chore(release): 4.0.0 [skip ci]

# [4.0.0](https://github.com/mob-sakai/ParticleEffectForUGUI/compare/3.3.12...4.0.0) (2022-06-21)

### Bug Fixes

* correct world space particle position when changing screen size ([c6644a2](c6644a2132))
* keep properly canvas batches ([d8e96e6](d8e96e69a6))

### Features

* adaptive scaling for UI ([aa0d56f](aa0d56f9fa))
* add overlay window for UIParticle ([7b21c50](7b21c500ef))
* add particle attractor component ([386170c](386170cbf6))
* display warning in inspector if using 'TEXCOORD*.zw' components as custom vertex stream ([59221d5](59221d5821))
* mesh sharing group ([9afeebf](9afeebf672))
* random mesh sharing group ([4fa43ed](4fa43eda4b))
* support 8+ materials ([b76bf5a](b76bf5a5ad)), closes [#122](https://github.com/mob-sakai/ParticleEffectForUGUI/issues/122) [#152](https://github.com/mob-sakai/ParticleEffectForUGUI/issues/152) [#186](https://github.com/mob-sakai/ParticleEffectForUGUI/issues/186)

### BREAKING CHANGES

* If you update to v4, you may be required to adjust your UIParticle.scale.

.github/workflows/release.yml

@@ -12,12 +12,13 @@ on:
 jobs:
   release:
     runs-on: ubuntu-latest
-    if: "! contains(github.event.head_commit.message, '[skip ci]') && ! contains(github.event.head_commit.message, '[ci skip]')"
     steps:
       - uses: actions/checkout@v2
 
-      - run: |
+      - uses: cycjimmy/semantic-release-action@v2
-          npm i --no-save https://gist.github.com/mob-sakai/c90044338361af97a7e8c8a78425bdb3
+        with:
-          npx semantic-release -e @mob-sakai/semantic-release-upm
+          extra_plugins: |
+            @semantic-release/changelog
+            @semantic-release/git
         env:
           GITHUB_TOKEN: ${{ github.token }}

.github/workflows/test.yml

@@ -14,23 +14,25 @@ on:
       - synchronize
 
 jobs:
-  unity-test:
+  setup:
     runs-on: ubuntu-latest
+    outputs:
+      versions: ${{ steps.setup.outputs.versions }}
+    steps:
+      - id: setup
+        run: |
+          VERSIONS=`npx unity-changeset list --versions --all --latest-patch --min 2018.3 --json`
+          echo "==== Target Unity Versions ===="
+          echo "${VERSIONS}"
+          echo "::set-output name=versions::${VERSIONS}"
+
+  test:
+    runs-on: ubuntu-latest
+    needs: setup
     strategy:
       fail-fast: false
       matrix:
-        unityVersion: [
+        version: ${{ fromJson(needs.setup.outputs.versions) }}
-            "2018.3.14f1",
-            "2018.4.30f1",
-            "2019.1.14f1",
-            "2019.2.21f1",
-            "2019.3.15f1",
-            "2019.4.16f1",
-            "2020.1.17f1",
-            "2020.2.1f1",
-          ]
-    env:
-      UNITY_LICENSE: ${{ secrets.UNITY_LICENSE }}
 
     steps:
       # Checkout sandbox project
@@ -45,52 +47,23 @@ jobs:
         working-directory: Packages/dev
         run: git checkout ${{ github.sha }}
 
+      # Cache
       - uses: actions/cache@v2
         with:
           path: Library
-          key: Library-${{ matrix.unityVersion }}-${{ github.sha }}
+          key: Library-${{ matrix.version }}-${{ github.sha }}
           restore-keys: |
-            Library-${{ matrix.unityVersion }}-
+            Library-${{ matrix.version }}-
             Library-
 
-      # Install codecoverage package
-      - name: "Install codecoverage package"
-        if: startsWith(matrix.unityVersion, '2019.4.')
-        run: |
-          npx openupm-cli add -f com.unity.testtools.codecoverage@0.4.0-preview
-
       # Run tests
       - name: "Run tests"
-        uses: game-ci/unity-test-runner@main
+        uses: game-ci/unity-test-runner@v2
         with:
-          unityVersion: ${{ matrix.unityVersion }}
+          customImage: mobsakai/unity3d:${{ matrix.version }}
-          customImage: ghcr.io/mob-sakai/unity3d:${{ matrix.unityVersion }}
+          customParameters: -nographics
-          customParameters: -enableCodeCoverage
+          # unityVersion: ${{ matrix.version }}
-          # customParameters: -enableCodeCoverage -coverageOptions assemblyFilters:+CSharpCompilerSettings_,-*-CSharp,-*.Tests,-IgnoreAccessibility
+          checkName: ${{ matrix.version }} Test Results
-
+          githubToken: ${{ github.token }}
-      - uses: actions/upload-artifact@v2
+        env:
-        if: always()
+          UNITY_LICENSE: ${{ secrets.UNITY_LICENSE }}
-        with:
-          name: TestResults-${{ matrix.unityVersion }}
-          path: |
-            artifacts/*.xml
-            CodeCoverage/**/TestCoverageResults_*.xml
-
-  publish:
-    needs: unity-test
-    runs-on: ubuntu-latest
-    if: always()
-    steps:
-      
-      - uses: actions/download-artifact@v2
-        with:
-          path: artifacts
-      
-      - uses: testspace-com/setup-testspace@v1
-        with:
-          domain: ${{github.repository_owner}}
-
-      - name: Push test results
-        if: always()
-        run: |
-          testspace `find . -name '*.xml' | tr '\n' ' '`

.releaserc.json

@@ -0,0 +1,25 @@
+{
+  "branches": [
+    "+([0-9])?(.{+([0-9]),x}).x",
+    "master",
+    "main",
+    {
+      "name": "preview",
+      "prerelease": true
+    }
+  ],
+  "tagFormat": "${version}",
+  "plugins": [
+    "@semantic-release/commit-analyzer",
+    "@semantic-release/release-notes-generator",
+    "@semantic-release/changelog",
+    [
+      "@semantic-release/npm",
+      {
+        "npmPublish": false
+      }
+    ],
+    "@semantic-release/git",
+    "@semantic-release/github"
+  ]
+}

CHANGELOG.md

@@ -1,3 +1,120 @@
+# [4.0.0](https://github.com/mob-sakai/ParticleEffectForUGUI/compare/3.3.12...4.0.0) (2022-06-21)
+
+
+### Bug Fixes
+
+* correct world space particle position when changing screen size ([c6644a2](https://github.com/mob-sakai/ParticleEffectForUGUI/commit/c6644a213263375c7a35b5082ef4b71cc58964e6))
+* keep properly canvas batches ([d8e96e6](https://github.com/mob-sakai/ParticleEffectForUGUI/commit/d8e96e69a62dff7a451eaed32c7a814e7e62dbb9))
+
+
+### Features
+
+* adaptive scaling for UI ([aa0d56f](https://github.com/mob-sakai/ParticleEffectForUGUI/commit/aa0d56f9faa05e9679d4b476bcf135eafb1b8af9))
+* add overlay window for UIParticle ([7b21c50](https://github.com/mob-sakai/ParticleEffectForUGUI/commit/7b21c500ef78103b605fdca71051d2357b09602f))
+* add particle attractor component ([386170c](https://github.com/mob-sakai/ParticleEffectForUGUI/commit/386170cbf68ebf59d4510fe0a45cf83925ec9ba4))
+* display warning in inspector if using 'TEXCOORD*.zw' components as custom vertex stream ([59221d5](https://github.com/mob-sakai/ParticleEffectForUGUI/commit/59221d58217a440b77d504e6428bf99f10246260))
+* mesh sharing group ([9afeebf](https://github.com/mob-sakai/ParticleEffectForUGUI/commit/9afeebf67212cdf4d3ac9e9a3b78a7ced5c7ecfe))
+* random mesh sharing group ([4fa43ed](https://github.com/mob-sakai/ParticleEffectForUGUI/commit/4fa43eda4bc70c9c827c4fad9d5ae1327bfbc322))
+* support 8+ materials ([b76bf5a](https://github.com/mob-sakai/ParticleEffectForUGUI/commit/b76bf5a5ad378c3c4b16bcf08d21337757557101)), closes [#122](https://github.com/mob-sakai/ParticleEffectForUGUI/issues/122) [#152](https://github.com/mob-sakai/ParticleEffectForUGUI/issues/152) [#186](https://github.com/mob-sakai/ParticleEffectForUGUI/issues/186)
+
+
+### BREAKING CHANGES
+
+* If you update to v4, you may be required to adjust your UIParticle.scale.
+
+# [4.0.0-preview.1](https://github.com/mob-sakai/ParticleEffectForUGUI/compare/3.3.12...4.0.0-preview.1) (2022-06-18)
+
+
+### Bug Fixes
+
+* correct world space particle position when changing screen size ([c6644a2](https://github.com/mob-sakai/ParticleEffectForUGUI/commit/c6644a213263375c7a35b5082ef4b71cc58964e6))
+* keep properly canvas batches ([d8e96e6](https://github.com/mob-sakai/ParticleEffectForUGUI/commit/d8e96e69a62dff7a451eaed32c7a814e7e62dbb9))
+
+
+### Features
+
+* adaptive scaling for UI ([aa0d56f](https://github.com/mob-sakai/ParticleEffectForUGUI/commit/aa0d56f9faa05e9679d4b476bcf135eafb1b8af9))
+* add overlay window for UIParticle ([7b21c50](https://github.com/mob-sakai/ParticleEffectForUGUI/commit/7b21c500ef78103b605fdca71051d2357b09602f))
+* add particle attractor component ([386170c](https://github.com/mob-sakai/ParticleEffectForUGUI/commit/386170cbf68ebf59d4510fe0a45cf83925ec9ba4))
+* mesh sharing group ([9afeebf](https://github.com/mob-sakai/ParticleEffectForUGUI/commit/9afeebf67212cdf4d3ac9e9a3b78a7ced5c7ecfe))
+* random mesh sharing group ([4fa43ed](https://github.com/mob-sakai/ParticleEffectForUGUI/commit/4fa43eda4bc70c9c827c4fad9d5ae1327bfbc322))
+* support 8+ materials ([b76bf5a](https://github.com/mob-sakai/ParticleEffectForUGUI/commit/b76bf5a5ad378c3c4b16bcf08d21337757557101)), closes [#122](https://github.com/mob-sakai/ParticleEffectForUGUI/issues/122) [#152](https://github.com/mob-sakai/ParticleEffectForUGUI/issues/152) [#186](https://github.com/mob-sakai/ParticleEffectForUGUI/issues/186)
+
+
+### BREAKING CHANGES
+
+* If you update to v4, you may be required to adjust your UIParticle.scale.
+
+## [3.3.12](https://github.com/mob-sakai/ParticleEffectForUGUI/compare/3.3.11...3.3.12) (2022-06-10)
+
+
+### Bug Fixes
+
+* always display materials in inspector ([a10042d](https://github.com/mob-sakai/ParticleEffectForUGUI/commit/a10042d989dea18ff010bdbe970aa434e2bdf117))
+* UNITY_UI_ALPHACLIP in UIAdditive shader is not working ([e817e8d](https://github.com/mob-sakai/ParticleEffectForUGUI/commit/e817e8d3c75188f3243243855b135bd840699199))
+
+## [3.3.11](https://github.com/mob-sakai/ParticleEffectForUGUI/compare/3.3.10...3.3.11) (2022-06-10)
+
+
+### Bug Fixes
+
+* sorting by layer does not work properly ([ccc09e6](https://github.com/mob-sakai/ParticleEffectForUGUI/commit/ccc09e6aca2fa3d7bc887e6c733e66706e40ae0f))
+* when using linear color space, the particle colors are not output correctly ([11c3a7b](https://github.com/mob-sakai/ParticleEffectForUGUI/commit/11c3a7b37415d78e1b8ba3988a6e043c9f1861e0)), closes [#203](https://github.com/mob-sakai/ParticleEffectForUGUI/issues/203)
+
+## [3.3.10](https://github.com/mob-sakai/ParticleEffectForUGUI/compare/3.3.9...3.3.10) (2022-02-17)
+
+
+### Bug Fixes
+
+* annoying warning for [ExecuteInEditMode] ([b6b2c72](https://github.com/mob-sakai/ParticleEffectForUGUI/commit/b6b2c72b198566e2880a22831c937eff7e9eff28)), closes [#180](https://github.com/mob-sakai/ParticleEffectForUGUI/issues/180)
+* PrefabStageUtility class is not experimental after 2021.2 ([0fd5d7a](https://github.com/mob-sakai/ParticleEffectForUGUI/commit/0fd5d7affe707fa9e92abd6e192bf400dfb1a80a))
+
+## [3.3.9](https://github.com/mob-sakai/ParticleEffectForUGUI/compare/3.3.8...3.3.9) (2021-08-02)
+
+
+### Bug Fixes
+
+* fix for warning CS0618 ([61760d9](https://github.com/mob-sakai/ParticleEffectForUGUI/commit/61760d940cdd4baacaa196ac1631a0a1a40b7204))
+
+## [3.3.8](https://github.com/mob-sakai/ParticleEffectForUGUI/compare/3.3.7...3.3.8) (2021-06-08)
+
+
+### Bug Fixes
+
+* improve performance ([e352d15](https://github.com/mob-sakai/ParticleEffectForUGUI/commit/e352d153cef8c1efb2792e35010d7eed1e31a040))
+
+## [3.3.7](https://github.com/mob-sakai/ParticleEffectForUGUI/compare/3.3.6...3.3.7) (2021-06-02)
+
+
+### Bug Fixes
+
+* Refresh() will be called multiple times in the same frame, due to external assets ([0b9d80d](https://github.com/mob-sakai/ParticleEffectForUGUI/commit/0b9d80da939580c72ca1471081d7a034edc985d4))
+
+## [3.3.6](https://github.com/mob-sakai/ParticleEffectForUGUI/compare/3.3.5...3.3.6) (2021-05-11)
+
+
+### Bug Fixes
+
+* In rare cases, the generated camera (for baking) will not be deactivated ([12c748a](https://github.com/mob-sakai/ParticleEffectForUGUI/commit/12c748a8cd4adfd2dc5f085cec77050431f261a4))
+* remove from "Add Component" menu ([476c402](https://github.com/mob-sakai/ParticleEffectForUGUI/commit/476c4027ff5f70fb9b4c026dd5fc59bf5a876227))
+
+## [3.3.5](https://github.com/mob-sakai/ParticleEffectForUGUI/compare/3.3.4...3.3.5) (2021-02-28)
+
+
+### Bug Fixes
+
+* fix cached position for pre-warmed particles ([e3f42d7](https://github.com/mob-sakai/ParticleEffectForUGUI/commit/e3f42d747a7fd973b5813cc72a9444943a6c3ad0))
+* ParticleSystem creates particles in wrong position during pre-warm ([b93e0e4](https://github.com/mob-sakai/ParticleEffectForUGUI/commit/b93e0e4701c7011176eeec5c109dda7f4ea632e0)), closes [#147](https://github.com/mob-sakai/ParticleEffectForUGUI/issues/147)
+
+## [3.3.4](https://github.com/mob-sakai/ParticleEffectForUGUI/compare/3.3.3...3.3.4) (2021-02-22)
+
+
+### Bug Fixes
+
+* Multiselecting sets all scales to the same value ([13223b2](https://github.com/mob-sakai/ParticleEffectForUGUI/commit/13223b2d747609cf88b424ad590bda7f857b387d))
+* support sub emitter with 'PlayOnAwake' ([d5ce78a](https://github.com/mob-sakai/ParticleEffectForUGUI/commit/d5ce78ae5acf2740ba7fdc6cde9f197c4e165484))
+* The maximum material count is 8 ([3bb5241](https://github.com/mob-sakai/ParticleEffectForUGUI/commit/3bb52412751360409747192150188ae904f2c3d3))
+
 ## [3.3.3](https://github.com/mob-sakai/ParticleEffectForUGUI/compare/3.3.2...3.3.3) (2021-02-03)
 
 

README.md

@@ -1,8 +1,6 @@
 Particle Effect For UGUI (UI Particle)
 ===
 
-**:warning: NOTE: Do not use [the obsolete tags and branches](https://github.com/mob-sakai/ParticleEffectForUGUI/issues/108) to reference the package. They will be removed in near future. :warning:**
-
 This plugin provide a component to render particle effect for uGUI in Unity 2018.2 or later.  
 The particle rendering is maskable and sortable, without Camera, RenderTexture or Canvas.
 
@@ -30,47 +28,61 @@ This plugin uses new APIs `MeshBake/MashTrailBake` (added with Unity 2018.2) to
 You can mask and sort particles for uGUI without Camera, RenderTexture, Canvas.
 
 Compares this "Baking mesh" approach with the conventional approach:  
-(This scene is included in the package.)
+[Performance test results](https://github.com/mob-sakai/ParticleEffectForUGUI/issues/193#issuecomment-1160028374)
 
 |Approach|Good|Bad|Screenshot|
 |-|-|-|-|
-|Baking mesh<br>**\(UIParticle\)**|Rendered as is.<br>Maskable.<br>Sortable.<br>Less objects.|**Requires Unity 2018.2 or later.**<br>Requires UI shaders to use Mask.|<img src="https://user-images.githubusercontent.com/12690315/41765089-0302b9a2-763e-11e8-88b3-b6ffa306bbb0.gif" width="500px">|
+|Baking mesh<br>**\(UIParticle\)**|Rendered as is.<br>Maskable.<br>Sortable.<br>Less objects.|[Not support `TEXCOORD*.zw` components for custom vertex stream](https://github.com/mob-sakai/ParticleEffectForUGUI/issues/191#issuecomment-1043409186)|<img src="https://user-images.githubusercontent.com/12690315/41765089-0302b9a2-763e-11e8-88b3-b6ffa306bbb0.gif" width="500px">|
 |Do nothing|Rendered as is.|**Looks like a glitch.**<br>Not maskable.<br>Not sortable.|<img src="https://user-images.githubusercontent.com/12690315/41765090-0329828a-763e-11e8-8d8a-f1d269ea3bc7.gif" width="500px">|
 |Convert particle to UIVertex<br>[\(UIParticleSystem\)](https://forum.unity.com/threads/free-script-particle-systems-in-ui-screen-space-overlay.406862/)|Maskable.<br>Sortable.<br>Less objects.|**Adjustment is difficult.**<br>Requires UI shaders.<br>Difficult to adjust scale.<br>Force hierarchy scalling.<br>Simulation results are incorrect.<br>Trail, rotation of transform, time scaling are not supported.<br>Generate heavy GC every frame.|<img src="https://user-images.githubusercontent.com/12690315/41765088-02deb9c6-763e-11e8-98d0-9e0c1766ef39.gif" width="500px">|
 |Use Canvas to sort|Rendered as is.<br>Sortable.|**You must to manage sorting orders.**<br>Not maskable.<br>More batches.|<img src="https://user-images.githubusercontent.com/12690315/41765087-02b866ea-763e-11e8-8c33-081c9ad852f8.gif" width="500px">|
 |Use RenderTexture|Maskable.<br>Sortable.|**Requires Camera and RenderTexture.**<br>Difficult to adjust position and size.<br>Quality depends on the RenderTexture's setting.|<img src="https://user-images.githubusercontent.com/12690315/41765085-0291b3e2-763e-11e8-827b-72e5ee9bc556.gif" width="500px">|
 
+|Approach|FPS on Editor|FPS on iPhone6|FPS on Xperia XZ|
+|--|--|--|--|
+|Particle System|43|57|22|
+|UIParticleSystem|4|3|0 (unmeasurable)|
+|Sorting By Canvas|43|44|18|
+|UIParticle|17|12|4|
+|UIParticle with MeshSharing|44|45|30|
+
+<br><br>
 
 #### Features
 
 * Easy to use: the package is out-of-the-box
-* Sort particle effects with UI
+* Sort particle effects and UI by sibling index
 * No Camera, RenderTexture or Canvas are required
-* Masking with Mask or RectMask2D
+* Masking by Mask or RectMask2D
 * Support Trail module
-* Change alpha with CanvasGroup
+* Support CanvasGroup alpha
-* No heavy allocation every frame
+* No allocations
 * Support overlay, camera space and world space
 * Support changing material property with AnimationClip (AnimatableProperty)  
 ![](https://user-images.githubusercontent.com/12690315/53286323-2d94a980-37b0-11e9-8afb-c4a207805ff2.gif)
-
+* [4.0.0+] Support 8+ materials
+* [4.0.0+] Correct world space particle position when changing window size for standalone platforms (Windows, MacOSX and Linux)
+* [4.0.0+] Adaptive scaling for UI
+* [4.0.0+] Mesh sharing group to improve performance  
+![](https://user-images.githubusercontent.com/12690315/174311048-c882df81-6c34-4eba-b0aa-5645457692f1.gif)
+* [4.0.0+] particle attractor component  
+![](https://user-images.githubusercontent.com/12690315/174311027-462929a4-13f0-4ec4-86ea-9c832f2eecf1.gif)
 
 
 <br><br><br><br>
 
 ## Demo
 
-* [WebGL Demo](https://mob-sakai.github.io/Demos/ParticleEffectForUGUI)
+* [WebGL Demo](https://mob-sakai.github.io/demos/UIParticle_Demo/index.html)  
+> ![](https://user-images.githubusercontent.com/12690315/174311768-1843a5f2-f776-491b-aaa8-2a131a8b6a16.gif)
 * [WebGL Demo (Cartoon FX & War FX)](https://mob-sakai.github.io/Demos/ParticleEffectForUGUI_CFX)
   * [Cartoon FX Free][CFX] & [War FX][WFX] (by [Jean Moreno (JMO)][JMO]) with UIParticle
+> ![](https://user-images.githubusercontent.com/12690315/91664766-3e07ac00-eb2c-11ea-978b-ef723be80619.gif)
 
 [CFX]: https://assetstore.unity.com/packages/vfx/particles/cartoon-fx-free-109565
 [WFX]: https://assetstore.unity.com/packages/vfx/particles/war-fx-5669
 [JMO]: https://assetstore.unity.com/publishers/1669
 
-![](https://user-images.githubusercontent.com/12690315/91664766-3e07ac00-eb2c-11ea-978b-ef723be80619.gif)
-
-
 
 <br><br><br><br>
 
@@ -99,7 +111,7 @@ Find the manifest.json file in the Packages folder of your project and add a lin
 
 To update the package, change suffix `#{version}` to the target version.
 
-* `"com.coffee.ui-particle": "https://github.com/mob-sakai/ParticleEffectForUGUI.git#3.3.0",`
+* `"com.coffee.ui-particle": "https://github.com/mob-sakai/ParticleEffectForUGUI.git#4.0.0",`
 
 Or, use [UpmGitExtension](https://github.com/mob-sakai/UpmGitExtension) to install and update the package.
 
@@ -147,7 +159,7 @@ Unity 2018.2 supports embedded packages.
 
 `UIParticle` controls the ParticleSystems that is attached to its own game objects and child game objects.
 
-![](https://user-images.githubusercontent.com/12690315/99765566-af129a80-2b42-11eb-88f6-661182d0b619.png)
+![](https://user-images.githubusercontent.com/12690315/174413976-691eb38e-7f92-4fbe-9790-8771b9dc70b2.png)
 
 | Properties | Description |
 | -- | -- |
@@ -155,7 +167,7 @@ Unity 2018.2 supports embedded packages.
 | Ignore Canvas Scale | Ignore the scale of the root canvas.<br>This prevents it from displaying small even in hierarchy scaling mode of `ParticleSystem`. |
 | Scale | Scale the rendering.<br>When the `3D` toggle is enabled, 3D scale (x,y,z) is supported. |
 | Animatable Properties | If you want update material properties (e.g. `_MainTex_ST`, `_Color`) in AnimationClip, use this to mark the changes. |
-| Shrink By Material | Shrink rendering by material.<br>Performance will be improved, but in some cases the rendering is not correct. |
+| Mesh Sharing | Particle simulation results are shared within the same group.<br>A large number of the same effects can be displayed with a small load.<br>When the `Random` toggle is enabled, it will be grouped randomaly. |
 | Rendering Order | The ParticleSystems to be rendered.<br>You can change the rendering order and the materials. |
 
 NOTE: Press `Refresh` button to reconstruct rendering order based on children ParticleSystem's sorting order and z position.
@@ -171,7 +183,7 @@ NOTE: Press `Refresh` button to reconstruct rendering order based on children Pa
 
 <br><br>
 
-### With your ParticleSystem prefab
+### With your existing ParticleSystem prefab
 
 1. Select `Game Object/UI/ParticleSystem (Empty)` to create UIParticle.  
 ![empty](https://user-images.githubusercontent.com/12690315/95007362-cb697f00-0649-11eb-8a09-29b0a13791e4.png)
@@ -196,30 +208,57 @@ If you want to mask particles, set a stencil supported shader (such as `UI/UIAdd
 var go = GameObject.Instantiate(prefab);
 var uiParticle = go.AddComponent<UIParticle>();
 
-// Play/Stop the controled ParticleSystems.
+// Control by ParticleSystem.
+particleSystem.Play();
+particleSystem.Emit(10);
+
+// Control by UIParticle.
 uiParticle.Play();
 uiParticle.Stop();
 ```
 
+<br><br>
+
+### UIParticleAttractor component
+
+`UIParticleAttractor` attracts particles generated by the specified ParticleSystem.
+
+![](https://user-images.githubusercontent.com/12690315/174413982-b31c358a-8e1d-4b3e-a6d8-18b050b25d6f.png)
+![](https://user-images.githubusercontent.com/12690315/174311027-462929a4-13f0-4ec4-86ea-9c832f2eecf1.gif)
+
+| Properties | Description |
+| -- | -- |
+| Particle System | Attracts particles generated by the specified particle system. |
+| Distination Radius | Once the particle is within the radius, the particle lifetime will become 0 and `OnAttracted` will be called. |
+| Delay Rate | Delay to start attracting.<br>It is a percentage of the particle's start lifetime. |
+| Max Speed | Maximum speed of attracting.<br> If this value is too small, attracting may not be completed by the end of the lifetime and `OnAttracted` may not be called. |
+| Movement | Attracting movement type. (Linear, Smooth, Sphere) |
+| OnAttracted | An event called when attracting is complete (per particle). |
+
 <br><br><br><br>
 
 ## Development Note
 
-### Animatable material property
+### Shader Limitation
 
-![](https://user-images.githubusercontent.com/12690315/53286323-2d94a980-37b0-11e9-8afb-c4a207805ff2.gif)
+UIParticles are based on UIVertex.  
+Therefore, only xy components is available for each UV in the shader. (zw components will be ignored).  
+So unfortunately UIParticles will not work well with some shaders.  
+When using custom vertex streams, you can fill zw components with "unnecessary" data.  
+https://github.com/mob-sakai/ParticleEffectForUGUI/issues/191
 
-Animation clips can change the material properties of the Renderer, such as ParticleSystemRenderer.  
+- If you need a simple Additive shader, use the `UI/Additive` shader instead.
-It uses MaterialPropertyBlock so it does not create new material instances.  
+- If you need a simple alpha-blend shader, use the `UI/Default` shader instead.
-Using material properties, you can change UV animation, scale and color etc.
 
-Well, there is a component called CanvasRenderer.  
+### Overheads
-It is used by all Graphic components for UI (Text, Image, Raw Image, etc.) including UIParticle.  
-However, It is **NOT** a Renderer.  
-Therefore, in UIParticle, changing ParticleSystemRenderer's MaterialPropertyBlock by animation clip is ignored.
 
-To prevent this, Use "Animatable Material Property".  
+UIParticle has some overheads and the batching depends on uGUI.  
-"Animatable Material Property" gets the necessary properties from ParticleSystemRenderer's MaterialPropertyBlock and sets them to the CanvasRenderer's material. 
+When improving performance, keep the following in mind:
+- If you are displaying a large number of the same effect, consider `Mesh Sharing` feature in [UIParticle Component](#uiparticle-component).
+  - If you don't like the uniform output, consider `Random Group` feature.  
+![](https://user-images.githubusercontent.com/12690315/174311048-c882df81-6c34-4eba-b0aa-5645457692f1.gif)
+- If you are using multiple materials, you will have more draw calls.
+  - Consider single material, atlasing the sprites, and using `Sprite` mode in the `Texture Sheet Animation` module in ParticleSystem.
 
 
 

Samples~/Cartoon FX & War FX Demo/CFX Free Demo.unity

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+  m_Name: UIParticle_Demo_UIAdditive
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Samples~/Demo/Scripts/Coffee.UIParticle.Demo.asmdef

@@ -6,5 +6,9 @@
     "optionalUnityReferences": [],
     "includePlatforms": [],
     "excludePlatforms": [],
-    "allowUnsafeCode": false
+    "allowUnsafeCode": false,
+    "overrideReferences": false,
+    "precompiledReferences": [],
+    "autoReferenced": false,
+    "defineConstraints": []
 }

Samples~/Demo/Scripts/CopyItemOnStart.cs

@@ -0,0 +1,25 @@
+using UnityEngine;
+
+namespace Coffee.UIExtensions.Demo
+{
+    public class CopyItemOnStart : MonoBehaviour
+    {
+        public GameObject origin;
+        public int count;
+
+        private void Start()
+        {
+            if (!origin) return;
+            origin.SetActive(false);
+
+            var parent = origin.transform.parent;
+            for (var i = 0; i < count; i++)
+            {
+                var go = Instantiate(origin, parent, false);
+                go.name = string.Format("{0} {1}", origin.name, i + 1);
+                go.hideFlags = HideFlags.DontSave;
+                go.SetActive(true);
+            }
+        }
+    }
+}

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Samples~/Demo/Scripts/UIElementDragger.cs

@@ -0,0 +1,82 @@
+using UnityEngine;
+using UnityEngine.EventSystems;
+
+public class UIElementDragger : MonoBehaviour, IBeginDragHandler, IDragHandler, IEndDragHandler
+{
+    public enum Target
+    {
+        Self,
+        Parent,
+        Custom,
+    }
+
+    private RectTransform rectTransform;
+    private Canvas canvas;
+    public Target m_Target;
+    public Transform m_CustomTarget;
+
+    private void OnEnable()
+    {
+        rectTransform = GetComponent<RectTransform>();
+        canvas = GetComponentInParent<Canvas>();
+    }
+
+    public void OnDrag(PointerEventData eventData)
+    {
+        var delta = (Vector3)GetLocalDelta(eventData.delta);
+
+        switch (m_Target)
+        {
+            case Target.Self:
+                rectTransform.localPosition += delta;
+                break;
+            case Target.Parent:
+                rectTransform.parent.localPosition += delta;
+                break;
+            case Target.Custom:
+                rectTransform.localPosition += delta;
+                if (m_CustomTarget)
+                {
+                    m_CustomTarget.localPosition += delta;
+                }
+                break;
+        }
+    }
+
+    public void OnBeginDrag(PointerEventData eventData)
+    {
+    }
+
+    public void OnEndDrag(PointerEventData eventData)
+    {
+    }
+
+    private Vector2 GetLocalDelta(Vector2 evDelta)
+    {
+        switch (canvas.renderMode)
+        {
+            case RenderMode.ScreenSpaceOverlay:
+                {
+                    var zero = transform.InverseTransformPoint(Vector2.zero);
+                    var delta = transform.InverseTransformPoint(evDelta);
+                    return delta - zero;
+                }
+            case RenderMode.ScreenSpaceCamera:
+                {
+                    Vector2 zero, delta;
+                    RectTransformUtility.ScreenPointToLocalPointInRectangle(rectTransform, Vector2.zero, canvas.worldCamera, out zero);
+                    RectTransformUtility.ScreenPointToLocalPointInRectangle(rectTransform, evDelta, canvas.worldCamera, out delta);
+                    return delta - zero;
+                }
+            case RenderMode.WorldSpace:
+                {
+                    Vector3 zero, delta;
+                    RectTransformUtility.ScreenPointToWorldPointInRectangle(rectTransform, Vector2.zero, canvas.worldCamera, out zero);
+                    RectTransformUtility.ScreenPointToWorldPointInRectangle(rectTransform, evDelta, canvas.worldCamera, out delta);
+                    return delta - zero;
+                }
+            default:
+                throw new System.NotSupportedException();
+        }
+    }
+}

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Samples~/Demo/Scripts/UIParticle_Demo.cs

@@ -0,0 +1,167 @@
+using UnityEngine;
+using UnityEngine.UI;
+
+namespace Coffee.UIExtensions.Demo
+{
+    public class UIParticle_Demo : MonoBehaviour
+    {
+        public Canvas root;
+
+        private int _width;
+        private int _height;
+
+        private void Start()
+        {
+            _width = Screen.width;
+            _height = Screen.height;
+        }
+
+        public void ResizeScreen()
+        {
+            switch (Application.platform)
+            {
+                case RuntimePlatform.OSXPlayer:
+                case RuntimePlatform.WindowsPlayer:
+                case RuntimePlatform.LinuxPlayer:
+                    if (Screen.width == _width && Screen.height == _height)
+                        Screen.SetResolution(_height, _width, Screen.fullScreen);
+                    else if (Screen.width == _height && Screen.height == _width)
+                        Screen.SetResolution(Mathf.Min(_width, _height), Mathf.Min(_width, _height), Screen.fullScreen);
+                    else
+                        Screen.SetResolution(_width, _height, Screen.fullScreen);
+                    break;
+            }
+        }
+
+        public void FullScreen()
+        {
+            Screen.fullScreen = !Screen.fullScreen;
+        }
+
+        public void EnableAnimations(bool enabled)
+        {
+            foreach (var animator in FindObjectsOfType<Animator>())
+            {
+                animator.enabled = enabled;
+            }
+        }
+
+        public void UIParticle_MeshSharing(bool enabled)
+        {
+            foreach (var uip in root.GetComponentsInChildren<UIParticle>(true))
+            {
+                uip.meshSharing = enabled ? UIParticle.MeshSharing.Auto : UIParticle.MeshSharing.None;
+            }
+        }
+
+        public void UIParticle_RandomGroup(bool enabled)
+        {
+            foreach (var uip in root.GetComponentsInChildren<UIParticle>(true))
+            {
+                uip.groupMaxId = enabled ? 4 : 0;
+            }
+        }
+
+        public void UIParticle_Scale(float scale)
+        {
+            foreach (var uip in FindObjectsOfType<UIParticle>())
+            {
+                uip.scale = scale;
+            }
+        }
+
+        public void ParticleSystem_WorldSpaseSimulation(bool enabled)
+        {
+            foreach (var ps in FindObjectsOfType<ParticleSystem>())
+            {
+                var main = ps.main;
+                main.simulationSpace = enabled ? ParticleSystemSimulationSpace.World : ParticleSystemSimulationSpace.Local;
+            }
+        }
+
+        public void ParticleSystem_WorldSpaseSimulation(ParticleSystem particleSystem)
+        {
+            foreach (var ps in particleSystem.GetComponentsInChildren<ParticleSystem>())
+            {
+                var main = ps.main;
+                main.simulationSpace = ParticleSystemSimulationSpace.World;
+                ps.Clear();
+            }
+        }
+
+        public void ParticleSystem_LocalSpaseSimulation(ParticleSystem particleSystem)
+        {
+            foreach (var ps in particleSystem.GetComponentsInChildren<ParticleSystem>())
+            {
+                var main = ps.main;
+                main.simulationSpace = ParticleSystemSimulationSpace.Local;
+                ps.Clear();
+            }
+        }
+
+        public void ParticleSystem_Emit(ParticleSystem particleSystem)
+        {
+            particleSystem.Emit(5);
+        }
+
+        public void ParticleSystem_SetScale(float scale)
+        {
+            foreach (var ps in FindObjectsOfType<ParticleSystem>())
+            {
+                ps.transform.localScale = new Vector3(scale, scale, scale);
+            }
+        }
+
+        public void UIParticleAttractor_Linear(UIParticleAttractor attractor)
+        {
+            attractor.movement = UIParticleAttractor.Movement.Linear;
+        }
+
+        public void UIParticleAttractor_Smooth(UIParticleAttractor attractor)
+        {
+            attractor.movement = UIParticleAttractor.Movement.Smooth;
+        }
+
+        public void UIParticleAttractor_Sphere(UIParticleAttractor attractor)
+        {
+            attractor.movement = UIParticleAttractor.Movement.Sphere;
+        }
+
+        int score = 0;
+        public void UIParticleAttractor_OnAttract(Text scoreText)
+        {
+            score++;
+            scoreText.text = score.ToString();
+            scoreText.GetComponent<Animator>().Play(0);
+        }
+
+        public void Canvas_WorldSpace(bool flag)
+        {
+            if (flag)
+            {
+                var canvas = FindObjectOfType<Canvas>();
+                canvas.renderMode = RenderMode.ScreenSpaceCamera;
+                canvas.renderMode = RenderMode.WorldSpace;
+                canvas.transform.rotation = Quaternion.Euler(new Vector3(0, 10, 0));
+            }
+        }
+
+        public void Canvas_CameraSpace(bool flag)
+        {
+            if (flag)
+            {
+                var canvas = FindObjectOfType<Canvas>();
+                canvas.renderMode = RenderMode.ScreenSpaceCamera;
+            }
+        }
+
+        public void Canvas_Overlay(bool flag)
+        {
+            if (flag)
+            {
+                var canvas = FindObjectOfType<Canvas>();
+                canvas.renderMode = RenderMode.ScreenSpaceOverlay;
+            }
+        }
+    }
+}

Samples~/Demo/Scripts/UIParticle_Demo_UIParticleController.cs

@@ -0,0 +1,33 @@
+using UnityEngine;
+
+namespace Coffee.UIExtensions.Demo
+{
+    public class UIParticle_Demo_UIParticleController : MonoBehaviour
+    {
+        public Transform root;
+
+        public void UIParticle_MeshSharing(bool enabled)
+        {
+            foreach (var uip in root.GetComponentsInChildren<UIParticle>(true))
+            {
+                uip.meshSharing = enabled ? UIParticle.MeshSharing.Auto : UIParticle.MeshSharing.None;
+            }
+        }
+
+        public void UIParticle_RandomGroup(bool enabled)
+        {
+            foreach (var uip in root.GetComponentsInChildren<UIParticle>(true))
+            {
+                uip.groupMaxId = enabled ? 4 : 0;
+            }
+        }
+
+        public void UIParticle_Scale(float scale)
+        {
+            foreach (var uip in root.GetComponentsInChildren<UIParticle>(true))
+            {
+                uip.scale = scale;
+            }
+        }
+    }
+}

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Samples~/Demo/UIParticleSystem_Demo.cs

@@ -1,335 +0,0 @@
-/// Credit glennpow, Zarlang
-/// Sourced from - http://forum.unity3d.com/threads/free-script-particle-systems-in-ui-screen-space-overlay.406862/
-/// Updated by Zarlang with a more robust implementation, including TextureSheet annimation support
-using UnityEngine;
-using UnityEngine.UI;
-
-namespace Coffee.UIExtensions.Demos
-{
-#if UNITY_5_3_OR_NEWER
-    [ExecuteInEditMode]
-    [RequireComponent(typeof(CanvasRenderer), typeof(ParticleSystem))]
-    public class UIParticleSystem_Demo : MaskableGraphic
-    {
-        [Tooltip("Having this enabled run the system in LateUpdate rather than in Update making it faster but less precise (more clunky)")]
-        public bool fixedTime = true;
-
-        private Transform _transform;
-        private ParticleSystem pSystem;
-        private ParticleSystem.Particle[] particles;
-        private UIVertex[] _quad = new UIVertex[4];
-        private Vector4 imageUV = Vector4.zero;
-        private ParticleSystem.TextureSheetAnimationModule textureSheetAnimation;
-        private int textureSheetAnimationFrames;
-        private Vector2 textureSheetAnimationFrameSize;
-        private ParticleSystemRenderer pRenderer;
-
-        private Material currentMaterial;
-
-        private Texture currentTexture;
-
-#if UNITY_5_5_OR_NEWER
-        private ParticleSystem.MainModule mainModule;
-#endif
-
-        public override Texture mainTexture
-        {
-            get
-            {
-                return currentTexture;
-            }
-        }
-
-        protected bool Initialize()
-        {
-            // initialize members
-            if (_transform == null)
-            {
-                _transform = transform;
-            }
-            if (pSystem == null)
-            {
-                pSystem = GetComponent<ParticleSystem>();
-
-                if (pSystem == null)
-                {
-                    return false;
-                }
-
-#if UNITY_5_5_OR_NEWER
-                mainModule = pSystem.main;
-                if (pSystem.main.maxParticles > 14000)
-                {
-                    mainModule.maxParticles = 14000;
-                }
-#else
-                    if (pSystem.maxParticles > 14000)
-                        pSystem.maxParticles = 14000;
-#endif
-
-                pRenderer = pSystem.GetComponent<ParticleSystemRenderer>();
-                if (pRenderer != null)
-                    pRenderer.enabled = false;
-
-                //Shader foundShader = Shader.Find("UI Extensions/Particles/Additive");
-                //Material pMaterial = new Material(foundShader);
-
-                //if (material == null)
-                    //material = pMaterial;
-
-                currentMaterial = material;
-                if (currentMaterial && currentMaterial.HasProperty("_MainTex"))
-                {
-                    currentTexture = currentMaterial.mainTexture;
-                    if (currentTexture == null)
-                        currentTexture = Texture2D.whiteTexture;
-                }
-                material = currentMaterial;
-                // automatically set scaling
-#if UNITY_5_5_OR_NEWER
-                mainModule.scalingMode = ParticleSystemScalingMode.Hierarchy;
-#else
-                    pSystem.scalingMode = ParticleSystemScalingMode.Hierarchy;
-#endif
-
-                particles = null;
-            }
-#if UNITY_5_5_OR_NEWER
-            if (particles == null)
-                particles = new ParticleSystem.Particle[pSystem.main.maxParticles];
-#else
-                if (particles == null)
-                    particles = new ParticleSystem.Particle[pSystem.maxParticles];
-#endif
-
-            imageUV = new Vector4(0, 0, 1, 1);
-
-            // prepare texture sheet animation
-            textureSheetAnimation = pSystem.textureSheetAnimation;
-            textureSheetAnimationFrames = 0;
-            textureSheetAnimationFrameSize = Vector2.zero;
-            if (textureSheetAnimation.enabled)
-            {
-                textureSheetAnimationFrames = textureSheetAnimation.numTilesX * textureSheetAnimation.numTilesY;
-                textureSheetAnimationFrameSize = new Vector2(1f / textureSheetAnimation.numTilesX, 1f / textureSheetAnimation.numTilesY);
-            }
-
-            return true;
-        }
-
-        protected override void Awake()
-        {
-            base.Awake();
-            if (!Initialize())
-                enabled = false;
-        }
-
-
-        protected override void OnPopulateMesh(VertexHelper vh)
-        {
-#if UNITY_EDITOR
-            if (!Application.isPlaying)
-            {
-                if (!Initialize())
-                {
-                    return;
-                }
-            }
-#endif
-            // prepare vertices
-            vh.Clear();
-
-            if (!gameObject.activeInHierarchy)
-            {
-                return;
-            }
-
-            Vector2 temp = Vector2.zero;
-            Vector2 corner1 = Vector2.zero;
-            Vector2 corner2 = Vector2.zero;
-            // iterate through current particles
-            int count = pSystem.GetParticles(particles);
-
-            for (int i = 0; i < count; ++i)
-            {
-                ParticleSystem.Particle particle = particles[i];
-
-                // get particle properties
-#if UNITY_5_5_OR_NEWER
-                Vector2 position = (mainModule.simulationSpace == ParticleSystemSimulationSpace.Local ? particle.position : _transform.InverseTransformPoint(particle.position));
-#else
-                    Vector2 position = (pSystem.simulationSpace == ParticleSystemSimulationSpace.Local ? particle.position : _transform.InverseTransformPoint(particle.position));
-#endif
-                float rotation = -particle.rotation * Mathf.Deg2Rad;
-                float rotation90 = rotation + Mathf.PI / 2;
-                Color32 color = particle.GetCurrentColor(pSystem);
-                float size = particle.GetCurrentSize(pSystem) * 0.5f;
-
-                // apply scale
-#if UNITY_5_5_OR_NEWER
-                if (mainModule.scalingMode == ParticleSystemScalingMode.Shape)
-                    position /= canvas.scaleFactor;
-#else
-                    if (pSystem.scalingMode == ParticleSystemScalingMode.Shape)
-                        position /= canvas.scaleFactor;
-#endif
-
-                // apply texture sheet animation
-                Vector4 particleUV = imageUV;
-                if (textureSheetAnimation.enabled)
-                {
-#if UNITY_5_5_OR_NEWER
-                    float frameProgress = 1 - (particle.remainingLifetime / particle.startLifetime);
-
-                    if (textureSheetAnimation.frameOverTime.curveMin != null)
-                    {
-                        frameProgress = textureSheetAnimation.frameOverTime.curveMin.Evaluate(1 - (particle.remainingLifetime / particle.startLifetime));
-                    }
-                    else if (textureSheetAnimation.frameOverTime.curve != null)
-                    {
-                        frameProgress = textureSheetAnimation.frameOverTime.curve.Evaluate(1 - (particle.remainingLifetime / particle.startLifetime));
-                    }
-                    else if (textureSheetAnimation.frameOverTime.constant > 0)
-                    {
-                        frameProgress = textureSheetAnimation.frameOverTime.constant - (particle.remainingLifetime / particle.startLifetime);
-                    }
-#else
-                    float frameProgress = 1 - (particle.lifetime / particle.startLifetime);
-#endif
-
-                    frameProgress = Mathf.Repeat(frameProgress * textureSheetAnimation.cycleCount, 1);
-                    int frame = 0;
-
-                    switch (textureSheetAnimation.animation)
-                    {
-
-                        case ParticleSystemAnimationType.WholeSheet:
-                            frame = Mathf.FloorToInt(frameProgress * textureSheetAnimationFrames);
-                            break;
-
-                        case ParticleSystemAnimationType.SingleRow:
-                            frame = Mathf.FloorToInt(frameProgress * textureSheetAnimation.numTilesX);
-
-                            int row = textureSheetAnimation.rowIndex;
-                            //                    if (textureSheetAnimation.useRandomRow) { // FIXME - is this handled internally by rowIndex?
-                            //                        row = Random.Range(0, textureSheetAnimation.numTilesY, using: particle.randomSeed);
-                            //                    }
-                            frame += row * textureSheetAnimation.numTilesX;
-                            break;
-
-                    }
-
-                    frame %= textureSheetAnimationFrames;
-
-                    particleUV.x = (frame % textureSheetAnimation.numTilesX) * textureSheetAnimationFrameSize.x;
-                    particleUV.y = Mathf.FloorToInt(frame / textureSheetAnimation.numTilesX) * textureSheetAnimationFrameSize.y;
-                    particleUV.z = particleUV.x + textureSheetAnimationFrameSize.x;
-                    particleUV.w = particleUV.y + textureSheetAnimationFrameSize.y;
-                }
-
-                temp.x = particleUV.x;
-                temp.y = particleUV.y;
-
-                _quad[0] = UIVertex.simpleVert;
-                _quad[0].color = color;
-                _quad[0].uv0 = temp;
-
-                temp.x = particleUV.x;
-                temp.y = particleUV.w;
-                _quad[1] = UIVertex.simpleVert;
-                _quad[1].color = color;
-                _quad[1].uv0 = temp;
-
-                temp.x = particleUV.z;
-                temp.y = particleUV.w;
-                _quad[2] = UIVertex.simpleVert;
-                _quad[2].color = color;
-                _quad[2].uv0 = temp;
-
-                temp.x = particleUV.z;
-                temp.y = particleUV.y;
-                _quad[3] = UIVertex.simpleVert;
-                _quad[3].color = color;
-                _quad[3].uv0 = temp;
-
-                if (rotation == 0)
-                {
-                    // no rotation
-                    corner1.x = position.x - size;
-                    corner1.y = position.y - size;
-                    corner2.x = position.x + size;
-                    corner2.y = position.y + size;
-
-                    temp.x = corner1.x;
-                    temp.y = corner1.y;
-                    _quad[0].position = temp;
-                    temp.x = corner1.x;
-                    temp.y = corner2.y;
-                    _quad[1].position = temp;
-                    temp.x = corner2.x;
-                    temp.y = corner2.y;
-                    _quad[2].position = temp;
-                    temp.x = corner2.x;
-                    temp.y = corner1.y;
-                    _quad[3].position = temp;
-                }
-                else
-                {
-                    // apply rotation
-                    Vector2 right = new Vector2(Mathf.Cos(rotation), Mathf.Sin(rotation)) * size;
-                    Vector2 up = new Vector2(Mathf.Cos(rotation90), Mathf.Sin(rotation90)) * size;
-
-                    _quad[0].position = position - right - up;
-                    _quad[1].position = position - right + up;
-                    _quad[2].position = position + right + up;
-                    _quad[3].position = position + right - up;
-                }
-
-                vh.AddUIVertexQuad(_quad);
-            }
-        }
-
-        void Update()
-        {
-            if (!fixedTime && Application.isPlaying)
-            {
-                pSystem.Simulate(Time.unscaledDeltaTime, false, false, true);
-                SetAllDirty();
-
-                if ((currentMaterial != null && currentTexture != currentMaterial.mainTexture) ||
-                    (material != null && currentMaterial != null && material.shader != currentMaterial.shader))
-                {
-                    pSystem = null;
-                    Initialize();
-                }
-            }
-        }
-
-        void LateUpdate()
-        {
-            if (!Application.isPlaying)
-            {
-                SetAllDirty();
-            }
-            else
-            {
-                if (fixedTime)
-                {
-                    pSystem.Simulate(Time.unscaledDeltaTime, false, false, true);
-                    SetAllDirty();
-                    if ((currentMaterial != null && currentTexture != currentMaterial.mainTexture) ||
-                        (material != null && currentMaterial != null && material.shader != currentMaterial.shader))
-                    {
-                        pSystem = null;
-                        Initialize();
-                    }
-                }
-            }
-            if (material == currentMaterial)
-                return;
-            pSystem = null;
-            Initialize();
-        }
-    }
-#endif
-}

Samples~/Demo/UIParticle_Demo.cs

@@ -1,111 +0,0 @@
-using UnityEngine;
-using UnityEngine.SceneManagement;
-using UnityEngine.UI;
-using System.Collections.Generic;
-
-namespace Coffee.UIExtensions.Demo
-{
-	public class UIParticle_Demo : MonoBehaviour
-	{
-		[SerializeField] ParticleSystem [] m_ParticleSystems = new ParticleSystem [0];
-		[SerializeField] List<Transform> m_ScalingByTransforms = new List<Transform> ();
-		[SerializeField] List<UIParticle> m_ScalingByUIParticles = new List<UIParticle> ();
-
-		public void SetTimeScale (float scale)
-		{
-			Time.timeScale = scale;
-		}
-
-		public void EnableTrailRibbon (bool ribbonMode)
-		{
-			foreach (var p in m_ParticleSystems)
-			{
-				var trails = p.trails;
-				trails.mode = ribbonMode ? ParticleSystemTrailMode.Ribbon : ParticleSystemTrailMode.PerParticle;
-			}
-		}
-
-		public void EnableSprite (bool enabled)
-		{
-			foreach (var p in m_ParticleSystems)
-			{
-				var tex = p.textureSheetAnimation;
-				tex.enabled = enabled;
-			}
-		}
-
-		public void EnableMask (bool enabled)
-		{
-			foreach (var m in FindObjectsOfType<Mask> ())
-			{
-				m.enabled = enabled;
-			}
-		}
-
-		public void EnableMask2D (bool enabled)
-		{
-			foreach (var m in FindObjectsOfType<RectMask2D> ())
-			{
-				m.enabled = enabled;
-			}
-		}
-
-		public void SetScale (float scale)
-		{
-			m_ScalingByTransforms.ForEach (x => x.localScale = Vector3.one * (10 * scale));
-			m_ScalingByUIParticles.ForEach (x => x.scale = scale);
-		}
-
-		public void SetUIParticleScale (float scale)
-		{
-			foreach (var uip in FindObjectsOfType<UIParticle> ())
-			{
-				uip.scale = scale;
-			}
-		}
-
-		public void LoadScene (string name)
-		{
-			SceneManager.LoadScene (name);
-		}
-
-		public void PlayAllParticleEffect ()
-		{
-			foreach (var animator in FindObjectsOfType<Animator> ())
-			{
-				animator.Play ("Play");
-			}
-
-			foreach (var particle in FindObjectsOfType<ParticleSystem> ())
-			{
-				particle.Play ();
-			}
-		}
-
-		public void SetWorldSpase (bool flag)
-		{
-			if (flag)
-			{
-				GetComponent<Canvas> ().renderMode = RenderMode.ScreenSpaceCamera;
-				GetComponent<Canvas> ().renderMode = RenderMode.WorldSpace;
-				transform.rotation = Quaternion.Euler (new Vector3 (0, 6, 0));
-			}
-		}
-
-		public void SetScreenSpase (bool flag)
-		{
-			if (flag)
-			{
-				GetComponent<Canvas> ().renderMode = RenderMode.ScreenSpaceCamera;
-			}
-		}
-
-		public void SetOverlay (bool flag)
-		{
-			if (flag)
-			{
-				GetComponent<Canvas> ().renderMode = RenderMode.ScreenSpaceOverlay;
-			}
-		}
-	}
-}

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@@ -5,8 +5,9 @@ Material:
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   m_ObjectHideFlags: 0
   m_CorrespondingSourceObject: {fileID: 0}
-  m_PrefabInternal: {fileID: 0}
+  m_PrefabInstance: {fileID: 0}
-  m_Name: UIParticle_Demo_Spread
+  m_PrefabAsset: {fileID: 0}
+  m_Name: UIParticle_PerformanceDemo_Spread
   m_Shader: {fileID: 4800000, guid: ecfa8f5732b504ef98fba10aa18d0326, type: 3}
   m_ShaderKeywords: 
   m_LightmapFlags: 4
@@ -63,6 +64,7 @@ Material:
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+    - _Glow: 1
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@@ -77,6 +79,7 @@ Material:
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+    - _UseUIAlphaClip: 0
     - _ZWrite: 1
     m_Colors:
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Samples~/Performance Demo/NanoMonitor/Scripts/Coffee.NanoMonitor.asmdef

@@ -0,0 +1,12 @@
+{
+    "name": "Coffee.NanoMonitor",
+    "references": [],
+    "optionalUnityReferences": [],
+    "includePlatforms": [],
+    "excludePlatforms": [],
+    "allowUnsafeCode": false,
+    "overrideReferences": false,
+    "precompiledReferences": [],
+    "autoReferenced": false,
+    "defineConstraints": []
+}

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Samples~/Performance Demo/NanoMonitor/Scripts/NanoMonitor.cs

@@ -0,0 +1,268 @@
+using System;
+using UnityEngine;
+using UnityEngine.Serialization;
+using UnityEngine.UI;
+#if UNITY_EDITOR
+using UnityEditor;
+
+#endif
+
+namespace Coffee.NanoMonitor
+{
+#if UNITY_EDITOR
+    [CustomEditor(typeof(NanoMonitor))]
+    internal class NanoMonitorEditor : Editor
+    {
+        private UnityEditorInternal.ReorderableList m_MonitorItemList;
+
+        private void OnEnable()
+        {
+            var items = serializedObject.FindProperty("m_CustomMonitorItems");
+            m_MonitorItemList = new UnityEditorInternal.ReorderableList(serializedObject, items)
+            {
+                draggable = false,
+                drawHeaderCallback = r => { EditorGUI.LabelField(r, new GUIContent("Custom Monitor Items")); },
+                drawElementCallback = (r, i, _, __) =>
+                {
+                    EditorGUI.LabelField(new Rect(r.x, r.y, r.width, r.height - 2), GUIContent.none, EditorStyles.textArea);
+                    var labelWidth = EditorGUIUtility.labelWidth;
+                    EditorGUIUtility.labelWidth = 80;
+                    EditorGUI.PropertyField(new Rect(r.x + 2, r.y + 3, r.width - 4, r.height - 4), items.GetArrayElementAtIndex(i), true);
+                    EditorGUIUtility.labelWidth = labelWidth;
+                },
+                elementHeightCallback = i => EditorGUI.GetPropertyHeight(items.GetArrayElementAtIndex(i)) + 6,
+            };
+        }
+
+        public override void OnInspectorGUI()
+        {
+            base.OnInspectorGUI();
+
+            m_MonitorItemList.DoLayoutList();
+            serializedObject.ApplyModifiedProperties();
+        }
+    }
+#endif
+
+
+    [DisallowMultipleComponent]
+    public sealed class NanoMonitor : MonoBehaviour
+    {
+        //################################
+        // Serialize Members.
+        //################################
+        // Settings
+        [Header("Settings")] [SerializeField] [Range(0.01f, 2f)]
+        private float m_Interval = 1f;
+
+        [SerializeField] [Range(0, 3)] private int m_Precision = 2;
+        [SerializeField] private Font m_Font;
+
+        // Foldout
+        [Header("Foldout")] [SerializeField] private bool m_Opened = false;
+
+        [FormerlySerializedAs("m_Collapse")] [SerializeField]
+        private GameObject m_FoldoutObject = null;
+
+        [SerializeField] private Button m_OpenButton = null;
+        [SerializeField] private Button m_CloseButton = null;
+
+        // View
+        [Header("View")] [SerializeField] private MonitorUI m_Fps = null;
+        [SerializeField] private MonitorUI m_Gc = null;
+        [SerializeField] private MonitorUI m_MonoUsage = null;
+        [SerializeField] private MonitorUI m_UnityUsage = null;
+
+        [HideInInspector] [SerializeField] private CustomMonitorItem[] m_CustomMonitorItems = new CustomMonitorItem[0];
+
+
+        //################################
+        // Public Members.
+        //################################
+        public void Clean()
+        {
+            Resources.UnloadUnusedAssets();
+            GC.Collect();
+        }
+
+
+        //################################
+        // Private Members.
+        //################################
+        private double _elapsed;
+        private double _fpsElapsed;
+        private int _frames;
+
+        private void Open()
+        {
+            _frames = 0;
+            _elapsed = m_Interval;
+            _fpsElapsed = 0;
+
+            if (m_FoldoutObject)
+            {
+                m_FoldoutObject.SetActive(true);
+            }
+
+            if (m_CloseButton)
+            {
+                m_CloseButton.gameObject.SetActive(true);
+            }
+
+            if (m_OpenButton)
+            {
+                m_OpenButton.gameObject.SetActive(false);
+            }
+        }
+
+        private void Close()
+        {
+            if (m_FoldoutObject)
+            {
+                m_FoldoutObject.SetActive(false);
+            }
+
+            if (m_CloseButton)
+            {
+                m_CloseButton.gameObject.SetActive(false);
+            }
+
+            if (m_OpenButton)
+            {
+                m_OpenButton.gameObject.SetActive(true);
+            }
+        }
+
+
+        //################################
+        // Unity Callbacks.
+        //################################
+        private void OnEnable()
+        {
+            if (m_OpenButton)
+            {
+                m_OpenButton.onClick.AddListener(Open);
+            }
+
+            if (m_CloseButton)
+            {
+                m_CloseButton.onClick.AddListener(Close);
+            }
+
+            if (m_Opened)
+            {
+                Open();
+            }
+            else
+            {
+                Close();
+            }
+        }
+
+        private void OnDisable()
+        {
+            if (m_OpenButton)
+            {
+                m_OpenButton.onClick.RemoveListener(Open);
+            }
+
+            if (m_CloseButton)
+            {
+                m_CloseButton.onClick.RemoveListener(Close);
+            }
+        }
+
+        private void Update()
+        {
+            _frames++;
+            _elapsed += Time.unscaledDeltaTime;
+            _fpsElapsed += Time.unscaledDeltaTime;
+            if (_elapsed < m_Interval) return;
+
+            if (m_Fps)
+            {
+                m_Fps.SetText("FPS: {0}", (int) (_frames / _fpsElapsed));
+            }
+
+            if (m_Gc)
+            {
+                m_Gc.SetText("GC: {0}", GC.CollectionCount(0));
+            }
+
+            if (m_MonoUsage)
+            {
+                var monoUsed = (UnityEngine.Profiling.Profiler.GetMonoUsedSizeLong() >> 10) / 1024f;
+                var monoTotal = (UnityEngine.Profiling.Profiler.GetMonoHeapSizeLong() >> 10) / 1024f;
+                if (m_Precision == 3)
+                {
+                    m_MonoUsage.SetText("Mono: {0:N3}/{1:N3}MB", monoUsed, monoTotal);
+                }
+                else if (m_Precision == 2)
+                {
+                    m_MonoUsage.SetText("Mono: {0:N2}/{1:N2}MB", monoUsed, monoTotal);
+                }
+                else if (m_Precision == 1)
+                {
+                    m_MonoUsage.SetText("Mono: {0:N1}/{1:N1}MB", monoUsed, monoTotal);
+                }
+                else
+                {
+                    m_MonoUsage.SetText("Mono: {0:N0}/{1:N0}MB", monoUsed, monoTotal);
+                }
+            }
+
+            if (m_UnityUsage)
+            {
+                var unityUsed = (UnityEngine.Profiling.Profiler.GetTotalAllocatedMemoryLong() >> 10) / 1024f;
+                var unityTotal = (UnityEngine.Profiling.Profiler.GetTotalReservedMemoryLong() >> 10) / 1024f;
+                if (m_Precision == 3)
+                {
+                    m_UnityUsage.SetText("Unity: {0:N3}/{1:N3}MB", unityUsed, unityTotal);
+                }
+                else if (m_Precision == 2)
+                {
+                    m_UnityUsage.SetText("Unity: {0:N2}/{1:N2}MB", unityUsed, unityTotal);
+                }
+                else if (m_Precision == 1)
+                {
+                    m_UnityUsage.SetText("Unity: {0:N1}/{1:N1}MB", unityUsed, unityTotal);
+                }
+                else
+                {
+                    m_UnityUsage.SetText("Unity: {0:N0}/{1:N0}MB", unityUsed, unityTotal);
+                }
+            }
+
+            foreach (var item in m_CustomMonitorItems)
+            {
+                item.UpdateText();
+            }
+
+            _frames = 0;
+            _elapsed %= m_Interval;
+            _fpsElapsed = 0;
+        }
+
+#if UNITY_EDITOR
+        private void OnValidate()
+        {
+            if (m_Font)
+            {
+                foreach (var ui in GetComponentsInChildren<MonitorUI>(true))
+                {
+                    ui.font = m_Font;
+                }
+            }
+
+            if (m_Opened)
+            {
+                Open();
+            }
+            else
+            {
+                Close();
+            }
+        }
+#endif
+    }
+}

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Samples~/Performance Demo/NanoMonitor/Scripts/ProfilerUI.meta

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Samples~/Performance Demo/NanoMonitor/Scripts/ProfilerUI/FixedFont.cs

@@ -0,0 +1,138 @@
+using System.Collections.Generic;
+using UnityEngine;
+using UnityEngine.UI;
+
+namespace Coffee.NanoMonitor{
+    public class FixedFont
+    {
+        private readonly UIVertex[] _tmpVerts = new UIVertex[4];
+        private static readonly Dictionary<Font, FixedFont> _fonts = new Dictionary<Font, FixedFont>();
+        private static readonly TextGenerator _textGenerator = new TextGenerator(100);
+
+        private static TextGenerationSettings _settings = new TextGenerationSettings
+        {
+            scaleFactor = 1,
+            horizontalOverflow = HorizontalWrapMode.Overflow,
+            verticalOverflow = VerticalWrapMode.Overflow,
+            alignByGeometry = true,
+            textAnchor = TextAnchor.MiddleCenter,
+            color = Color.white
+        };
+
+        private int _resolution = 0;
+        private readonly Font _font;
+        private UIVertex[] _verts;
+        private UICharInfo[] _charInfos;
+
+        private FixedFont(Font font)
+        {
+            _font = font;
+        }
+
+        public int fontSize => _font.dynamic ? 32 : _font.fontSize;
+
+        public static FixedFont GetOrCreate(Font font)
+        {
+            if (font == null) return null;
+            if (_fonts.TryGetValue(font, out var data)) return data;
+
+            data = new FixedFont(font);
+            _fonts.Add(font, data);
+            return data;
+        }
+
+        public void Invalidate()
+        {
+            _resolution = 0;
+        }
+
+        public void UpdateFont()
+        {
+            if (!_font) return;
+
+            var mat = _font.material;
+            if (!mat) return;
+
+            var tex = mat.mainTexture;
+            if (!tex) return;
+
+            var currentResolution = tex.width * tex.height;
+
+            if (_resolution == currentResolution) return;
+            _resolution = currentResolution;
+
+            _settings.font = _font;
+            _textGenerator.Invalidate();
+            _textGenerator.Populate("_!\"#$%&'()*+,-./0123456789:;<=>?@ABCDEFGHIJKLMNOPQRSTUVWXYZ[\\]^_`abcdefghijklmnopqrstuvwxyz{|}~", _settings);
+
+            _verts = _textGenerator.GetVerticesArray();
+            _charInfos = _textGenerator.GetCharactersArray();
+
+            float offsetX = 0;
+            for (var i = 0; i < _verts.Length; i++)
+            {
+                if ((i & 3) == 0)
+                    offsetX = _verts[i].position.x;
+
+                var v = _verts[i];
+                v.position -= new Vector3(offsetX, 0);
+                _verts[i] = v;
+            }
+        }
+
+        public float Layout(char c, float offset, float scale)
+        {
+            if (_charInfos == null) return offset;
+            if (c < 0x20 || 0x7e < c) return offset;
+            var ci = c - 0x20;
+
+            return offset + _charInfos[ci].charWidth * scale;
+        }
+
+        public float Append(VertexHelper toFill, char c, float offset, float scale, Color color)
+        {
+            if (_verts == null || _charInfos == null) return offset;
+            if (c < 0x20 || 0x7e < c) return offset;
+            var ci = c - 0x20;
+
+            for (var i = 0; i < 4; i++)
+            {
+                _tmpVerts[i] = _verts[ci * 4 + i];
+                _tmpVerts[i].position = _tmpVerts[i].position * scale + new Vector3(offset, 0);
+                _tmpVerts[i].color = ci == 0 ? Color.clear : color;
+            }
+
+            toFill.AddUIVertexQuad(_tmpVerts);
+            return offset + _charInfos[ci].charWidth * scale;
+        }
+
+        public void Fill(VertexHelper toFill, Color color, RectTransform tr)
+        {
+            if (_verts == null || _charInfos == null) return;
+            const int ci = '*' - 0x20;
+            var uv = (_verts[ci * 4].uv0 + _verts[ci * 4 + 2].uv0) / 2;
+
+            var rect = tr.rect;
+            var size = rect.size / 2;
+            var offset = (new Vector2(0.5f, 0.5f) - tr.pivot) * rect.size;
+
+            for (var i = 0; i < 4; i++)
+            {
+                _tmpVerts[i] = new UIVertex();
+                _tmpVerts[i].uv0 = uv;
+                _tmpVerts[i].color = color;
+
+                if (i == 0)
+                    _tmpVerts[i].position = new Vector2(-size.x, -size.y) + offset;
+                else if (i == 1)
+                    _tmpVerts[i].position = new Vector2(-size.x, size.y) + offset;
+                else if (i == 2)
+                    _tmpVerts[i].position = new Vector2(size.x, size.y) + offset;
+                else
+                    _tmpVerts[i].position = new Vector2(size.x, -size.y) + offset;
+            }
+
+            toFill.AddUIVertexQuad(_tmpVerts);
+        }
+    }
+}

Samples~/Performance Demo/NanoMonitor/Scripts/ProfilerUI/FixedFont.cs.meta

@@ -0,0 +1,12 @@
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+guid: 9a8c5c555d4bf4361ab3435c318c0699
+MonoImporter:
+  externalObjects: {}
+  serializedVersion: 2
+  defaultReferences:
+  - m_Material: {fileID: 2100000, guid: 4da4639f724144ddead57bffca64e71f, type: 3}
+  executionOrder: 0
+  icon: {instanceID: 0}
+  userData: 
+  assetBundleName: 
+  assetBundleVariant: 

Samples~/Performance Demo/NanoMonitor/Scripts/ProfilerUI/MonitorUI.cs

@@ -0,0 +1,236 @@
+using System.Text;
+using UnityEngine;
+using UnityEngine.UI;
+
+namespace Coffee.NanoMonitor{
+#if UNITY_EDITOR
+    using UnityEditor;
+
+    [CustomEditor(typeof(MonitorUI))]
+    public class MonitorTextEditor : Editor
+    {
+        private SerializedProperty m_Mode;
+        private SerializedProperty m_TextAnchor;
+        private SerializedProperty m_FontSize;
+        private SerializedProperty m_Font;
+        private SerializedProperty m_Text;
+        private SerializedProperty m_Color;
+
+        private void OnEnable()
+        {
+            m_Mode = serializedObject.FindProperty("m_Mode");
+
+            m_Text = serializedObject.FindProperty("m_Text");
+            m_Color = serializedObject.FindProperty("m_Color");
+            var fontData = serializedObject.FindProperty("m_FontData");
+            m_FontSize = fontData.FindPropertyRelative("m_FontSize");
+            m_Font = fontData.FindPropertyRelative("m_Font");
+            m_TextAnchor = serializedObject.FindProperty("m_TextAnchor");
+        }
+
+        public override void OnInspectorGUI()
+        {
+            serializedObject.Update();
+
+            EditorGUILayout.PropertyField(m_Mode);
+            if ((MonitorUI.Mode) m_Mode.intValue == MonitorUI.Mode.Text)
+            {
+                EditorGUILayout.PropertyField(m_Text);
+                EditorGUILayout.PropertyField(m_FontSize);
+                EditorGUILayout.PropertyField(m_TextAnchor);
+
+                //EditorGUI.BeginDisabledGroup(true);
+                EditorGUILayout.PropertyField(m_Font);
+                //EditorGUI.EndDisabledGroup();
+            }
+
+            EditorGUILayout.PropertyField(m_Color);
+
+            serializedObject.ApplyModifiedProperties();
+        }
+    }
+#endif
+
+    public class MonitorUI : Text
+    {
+        public enum Mode
+        {
+            Text,
+            Fill,
+        }
+
+        public enum TextAnchor
+        {
+            Left,
+            Center,
+            Right
+        }
+
+
+        //################################
+        // Serialize Members.
+        //################################
+        [SerializeField] private Mode m_Mode = Mode.Text;
+        [SerializeField] private TextAnchor m_TextAnchor;
+
+
+        //################################
+        // Public Members.
+        //################################
+        public override string text
+        {
+            get => m_StringBuilder.ToString();
+            set
+            {
+                m_Text = value;
+                if (m_StringBuilder.IsEqual(m_Text)) return;
+
+                m_StringBuilder.Length = 0;
+                m_StringBuilder.Append(m_Text);
+                SetVerticesDirty();
+            }
+        }
+
+        public TextAnchor textAnchor
+        {
+            get => m_TextAnchor;
+            set
+            {
+                if (m_TextAnchor == value) return;
+
+                m_TextAnchor = value;
+                SetVerticesDirty();
+            }
+        }
+
+        public override bool raycastTarget
+        {
+            get => m_Mode == Mode.Fill;
+            set { }
+        }
+
+        public void SetText(string format, double arg0 = 0, double arg1 = 0, double arg2 = 0, double arg3 = 0)
+        {
+            m_StringBuilder.Length = 0;
+            m_StringBuilder.AppendFormatNoAlloc(format, arg0, arg1, arg2, arg3);
+            SetVerticesDirty();
+        }
+
+        public void SetText(StringBuilder builder)
+        {
+            m_StringBuilder.Length = 0;
+            m_StringBuilder.Append(builder);
+            SetVerticesDirty();
+        }
+
+
+        //################################
+        // Private Members.
+        //################################
+        private readonly StringBuilder m_StringBuilder = new StringBuilder(64);
+
+        private void UpdateFont()
+        {
+            //var globalFont = NNanoMonitorttings.Instance.font;
+            //if (globalFont)
+            //{
+            //    font = globalFont;
+            //}
+
+            var fontData = FixedFont.GetOrCreate(font);
+            if (fontData != null)
+            {
+                fontData.Invalidate();
+                fontData.UpdateFont();
+            }
+        }
+
+
+        //################################
+        // Unity Callbacks.
+        //################################
+        protected override void OnEnable()
+        {
+            //NaNanoMonitortings.Instance.onFontChanged += UpdateFont;
+            RegisterDirtyMaterialCallback(UpdateFont);
+
+            base.OnEnable();
+            raycastTarget = false;
+            maskable = false;
+            m_StringBuilder.Length = 0;
+            m_StringBuilder.Append(m_Text);
+        }
+
+        protected override void OnDisable()
+        {
+            //NanNanoMonitorings.Instance.onFontChanged -= UpdateFont;
+            UnregisterDirtyMaterialCallback(UpdateFont);
+
+            base.OnDisable();
+        }
+
+#if UNITY_EDITOR
+        protected override void OnValidate()
+        {
+            base.OnValidate();
+
+            if (!m_StringBuilder.IsEqual(m_Text))
+            {
+                m_StringBuilder.Length = 0;
+                m_StringBuilder.Append(m_Text);
+            }
+        }
+#endif
+
+        protected override void OnPopulateMesh(VertexHelper toFill)
+        {
+            toFill.Clear();
+
+            var fontData = FixedFont.GetOrCreate(font);
+            if (fontData == null) return;
+
+            fontData.UpdateFont();
+
+            if (m_Mode == Mode.Fill)
+            {
+                fontData.Fill(toFill, color, rectTransform);
+                return;
+            }
+
+            var scale = (float) fontSize / fontData.fontSize;
+            float offset = 0;
+            switch (textAnchor)
+            {
+                case TextAnchor.Left:
+                    offset = rectTransform.rect.xMin;
+                    break;
+                case TextAnchor.Center:
+                    for (var i = 0; i < m_StringBuilder.Length; i++)
+                        offset = fontData.Layout(m_StringBuilder[i], offset, scale);
+                    offset = -offset / 2;
+                    break;
+                case TextAnchor.Right:
+                    for (var i = 0; i < m_StringBuilder.Length; i++)
+                        offset = fontData.Layout(m_StringBuilder[i], offset, scale);
+                    offset = rectTransform.rect.xMax - offset;
+                    break;
+            }
+
+            for (var i = 0; i < m_StringBuilder.Length; i++)
+            {
+                offset = fontData.Append(toFill, m_StringBuilder[i], offset, scale, color);
+            }
+        }
+
+        protected override void UpdateMaterial()
+        {
+            base.UpdateMaterial();
+
+            var fontData = FixedFont.GetOrCreate(font);
+            if (fontData != null)
+            {
+                fontData.UpdateFont();
+            }
+        }
+    }
+}

Samples~/Performance Demo/NanoMonitor/Scripts/ProfilerUI/MonitorUI.cs.meta

@@ -0,0 +1,12 @@
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+guid: b0e08c6080a2e4d8186f97c60518830f
+MonoImporter:
+  externalObjects: {}
+  serializedVersion: 2
+  defaultReferences:
+  - m_Material: {fileID: 2100000, guid: 4da4639f724144ddead57bffca64e71f, type: 3}
+  executionOrder: 0
+  icon: {instanceID: 0}
+  userData: 
+  assetBundleName: 
+  assetBundleVariant: 

Samples~/Performance Demo/NanoMonitor/Scripts/ProjectSettings~/MiniProfilerSettings.cs

@@ -0,0 +1,55 @@
+using System;
+using System.Linq;
+using UnityEngine;
+using UnityEngine.SceneManagement;
+
+namespace Coffee.MiniProfiler
+{
+    internal class MiniProfilerSettings : ScriptableSettings<MiniProfilerSettings>
+    {
+        [Header("UI")]
+        [SerializeField] private Font m_Font = null;
+
+        [Header("Instantiate On Boot")]
+        [SerializeField] private GameObject miniProfilerPrefab = null;
+        [SerializeField] private string[] m_SceneNames = new string[0];
+
+        public Font font => m_Font;
+        public event Action onFontChanged;
+
+        protected override void OnBoot()
+        {
+            SceneManager.sceneLoaded -= OnSceneLoaded;
+            SceneManager.sceneLoaded += OnSceneLoaded;
+        }
+
+        public void OnSceneLoaded(Scene scene, LoadSceneMode __)
+        {
+            SceneManager.sceneLoaded -= OnSceneLoaded;
+            if (!miniProfilerPrefab || !m_SceneNames.Contains(scene.name)) return;
+
+            var go = Instantiate(miniProfilerPrefab);
+            if (Application.isPlaying)
+                DontDestroyOnLoad(go);
+        }
+
+        protected override bool bootOnPlayMode => true;
+        protected override bool bootOnEditorMode => false;
+
+#if UNITY_EDITOR
+        protected override void OnValidate()
+        {
+            onFontChanged?.Invoke();
+            base.OnValidate();
+        }
+
+        private void Reset()
+        {
+            m_Font = UnityEngine.Resources.GetBuiltinResource<Font>("Arial.ttf");
+        }
+
+        [UnityEditor.SettingsProvider]
+        private static UnityEditor.SettingsProvider CreateSettingsProvider() => new ScriptableSettingsProvider<MiniProfilerSettings>();
+#endif
+    }
+}

Samples~/Performance Demo/NanoMonitor/Scripts/ProjectSettings~/MiniProfilerSettings.cs.meta

@@ -0,0 +1,13 @@
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+  externalObjects: {}
+  serializedVersion: 2
+  defaultReferences:
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+      type: 3}
+  executionOrder: 0
+  icon: {instanceID: 0}
+  userData: 
+  assetBundleName: 
+  assetBundleVariant: 

Samples~/Performance Demo/NanoMonitor/Scripts/ProjectSettings~/ScriptableSettings.cs

@@ -0,0 +1,280 @@
+using UnityEngine;
+using System;
+using System.Linq;
+#if UNITY_EDITOR
+using UnityEditor;
+
+#endif
+
+namespace Coffee.MiniProfiler
+{
+    internal abstract class ScriptableSettings : ScriptableObject
+    {
+#if UNITY_EDITOR
+        public virtual string GetSettingPath()
+        {
+            return GetSettingPath(GetType());
+        }
+
+        internal static string GetSettingPath(Type type)
+        {
+            return $"Project/{ObjectNames.NicifyVariableName(type.Name.Replace("ProjectSettings", ""))}";
+        }
+#endif
+
+        public virtual string GetDefaultAssetPath()
+        {
+            return $"Assets/ProjectSettings/{GetType().Name}.asset";
+        }
+    }
+
+    internal abstract class ScriptableSettings<T> : ScriptableSettings
+        where T : ScriptableSettings<T>
+    {
+        //################################
+        // Public Members.
+        //################################
+        public static T Instance => _instance ? _instance : _instance = GetOrCreate();
+
+        private static T _instance;
+
+        protected virtual bool bootOnEditorMode => true;
+        protected virtual bool bootOnPlayMode => true;
+
+        protected abstract void OnBoot();
+
+#if UNITY_EDITOR
+        //################################
+        // Private Members.
+        //################################
+        private bool enabled;
+
+        private static T GetOrCreate()
+        {
+            return PlayerSettings.GetPreloadedAssets()
+                .OfType<T>()
+                .FirstOrDefault() ?? CreateInstance<T>();
+        }
+
+        private void OnPlayModeStateChanged(PlayModeStateChange state)
+        {
+            switch (state)
+            {
+                case PlayModeStateChange.EnteredEditMode:
+                    enabled = true;
+                    Boot();
+                    break;
+                case PlayModeStateChange.ExitingEditMode:
+                case PlayModeStateChange.ExitingPlayMode:
+                    enabled = false;
+                    break;
+            }
+        }
+
+        private void Boot()
+        {
+            var preloadedAssets = PlayerSettings.GetPreloadedAssets();
+            var assets = preloadedAssets.OfType<T>().ToArray();
+            var first = assets.FirstOrDefault() ?? this as T;
+
+            // If there are no preloaded assets, registry the first asset.
+            // If there are multiple preloaded assets, unregisters all but the first one.
+            if (assets.Length != 1)
+            {
+                // The first asset is not saved.
+                if (string.IsNullOrEmpty(AssetDatabase.GetAssetPath(first)))
+                {
+                    if (!AssetDatabase.IsValidFolder("Assets/ProjectSettings"))
+                        AssetDatabase.CreateFolder("Assets", "ProjectSettings");
+
+                    var assetName = ObjectNames.NicifyVariableName(first.GetType().Name.Replace("ProjectSettings", ""));
+                    var assetPath = AssetDatabase.GenerateUniqueAssetPath($"Assets/ProjectSettings/{assetName}.asset");
+                    AssetDatabase.CreateAsset(first, assetPath);
+                }
+
+                PlayerSettings.SetPreloadedAssets(preloadedAssets
+                    .Where(x => x)
+                    .Except(assets)
+                    .Concat(new[] {first})
+                    .ToArray());
+            }
+
+            // Another asset is registered as a preload asset.
+            if (first != this)
+            {
+                UnityEngine.Debug.LogError($"Another asset '{first}' is registered as a preload '{typeof(T).Name}' asset." +
+                                           $"\nThis instance ('{this}') will be ignored. Check 'Project Settings > Player > Preload Assets'", this);
+                return;
+            }
+
+            _instance = first;
+
+            // Do nothing on editor mode.
+            if (!bootOnEditorMode && !EditorApplication.isPlayingOrWillChangePlaymode)
+            {
+                return;
+            }
+
+            // Do nothing on play mode.
+            if (!bootOnPlayMode && EditorApplication.isPlayingOrWillChangePlaymode)
+            {
+                return;
+            }
+
+            OnBoot();
+        }
+
+
+        //################################
+        // Unity Callbacks.
+        //################################
+        private void OnEnable()
+        {
+            enabled = true;
+            Boot();
+            EditorApplication.playModeStateChanged += OnPlayModeStateChanged;
+        }
+
+        private void OnDisable()
+        {
+            EditorApplication.playModeStateChanged -= OnPlayModeStateChanged;
+        }
+
+        protected virtual void OnValidate()
+        {
+            if (enabled)
+                Boot();
+        }
+#else
+        private static T GetOrCreate()
+        {
+            return CreateInstance<T>();
+        }
+
+        private void OnEnable()
+        {
+            if (!bootOnPlayMode) return;
+
+            _instance = this as T;
+            OnBoot();
+        }
+#endif
+    }
+
+    [CustomEditor(typeof(ScriptablePreferenceSettings<>), true)]
+    internal class ScriptablePreferenceSettingsEditor : Editor
+    {
+        private static readonly GUIContent _button = new GUIContent("Open Project Settings");
+
+        public override void OnInspectorGUI()
+        {
+            if (GUILayout.Button(_button))
+            {
+                SettingsService.OpenProjectSettings(((ScriptableSettings) target).GetSettingPath());
+            }
+        }
+    }
+
+    internal abstract class ScriptablePreferenceSettings<T> : ScriptableSingleton<T>
+        where T : ScriptablePreferenceSettings<T>
+    {
+    }
+
+#if UNITY_EDITOR
+    [CustomEditor(typeof(ScriptableSettings), true)]
+    internal class ScriptableSettingsEditor : Editor
+    {
+        private static readonly GUIContent _button = new GUIContent("Open Project Settings");
+
+        public override void OnInspectorGUI()
+        {
+            if (GUILayout.Button(_button))
+            {
+                SettingsService.OpenProjectSettings(((ScriptableSettings) target).GetSettingPath());
+            }
+        }
+    }
+
+    internal class ScriptableSettingsProvider<T> : SettingsProvider where T : ScriptableSettings<T>
+    {
+        public ScriptableSettingsProvider(string path) : base(path)
+        {
+        }
+
+        public ScriptableSettingsProvider() : base(ScriptableSettings.GetSettingPath(typeof(T)))
+        {
+        }
+
+        protected SerializedObject serializedObject { get; private set; }
+        protected ScriptableSettings<T> target { get; private set; }
+
+        public sealed override void OnGUI(string searchContext)
+        {
+            if (!target)
+            {
+                target = ScriptableSettings<T>.Instance;
+                serializedObject = new SerializedObject(target);
+            }
+
+            OnGUI();
+        }
+
+        protected virtual void OnGUI()
+        {
+            serializedObject.UpdateIfRequiredOrScript();
+            var iterator = serializedObject.GetIterator();
+            var enterChildren = true;
+            while (iterator.NextVisible(enterChildren))
+            {
+                if (iterator.propertyPath != "m_Script")
+                    EditorGUILayout.PropertyField(iterator, true);
+
+                enterChildren = false;
+            }
+
+            serializedObject.ApplyModifiedProperties();
+        }
+    }
+
+    internal class ScriptablePreferenceSettingsProvider<T> : SettingsProvider where T : ScriptableSettings<T>
+    {
+        public ScriptablePreferenceSettingsProvider(string path) : base(path, SettingsScope.User)
+        {
+        }
+
+        public ScriptablePreferenceSettingsProvider() : base(ScriptableSettings.GetSettingPath(typeof(T)), SettingsScope.User)
+        {
+        }
+
+        protected SerializedObject serializedObject { get; private set; }
+        protected ScriptableSettings<T> target { get; private set; }
+
+        public sealed override void OnGUI(string searchContext)
+        {
+            if (!target)
+            {
+                target = ScriptableSettings<T>.Instance;
+                serializedObject = new SerializedObject(target);
+            }
+
+            OnGUI();
+        }
+
+        protected virtual void OnGUI()
+        {
+            serializedObject.UpdateIfRequiredOrScript();
+            var iterator = serializedObject.GetIterator();
+            var enterChildren = true;
+            while (iterator.NextVisible(enterChildren))
+            {
+                if (iterator.propertyPath != "m_Script")
+                    EditorGUILayout.PropertyField(iterator, true);
+
+                enterChildren = false;
+            }
+
+            serializedObject.ApplyModifiedProperties();
+        }
+    }
+#endif
+}

Samples~/Performance Demo/NanoMonitor/Scripts/ProjectSettings~/ScriptableSettings.cs.meta

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+  defaultReferences: []
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Samples~/Performance Demo/NanoMonitor/Scripts/Utilities.meta

@@ -0,0 +1,8 @@
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+folderAsset: yes
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+  externalObjects: {}
+  userData: 
+  assetBundleName: 
+  assetBundleVariant: 

Samples~/Performance Demo/NanoMonitor/Scripts/Utilities/CustomProfilerItem.cs

@@ -0,0 +1,47 @@
+using UnityEngine;
+#if UNITY_EDITOR
+using UnityEditor;
+#endif
+
+namespace Coffee.NanoMonitor
+{
+#if UNITY_EDITOR
+    [CustomPropertyDrawer(typeof(CustomMonitorItem))]
+    internal sealed class CustomMonitorItemDrawer : PropertyDrawer
+    {
+        public override void OnGUI(Rect p, SerializedProperty property, GUIContent label)
+        {
+            EditorGUI.PropertyField(new Rect(p.x, p.y + 18 * 0, p.width, 16), property.FindPropertyRelative("m_Text"));
+            EditorGUI.PropertyField(new Rect(p.x, p.y + 18 * 1, p.width, 16), property.FindPropertyRelative("m_Format"));
+            EditorGUI.indentLevel++;
+            EditorGUI.PropertyField(new Rect(p.x, p.y + 18 * 2, p.width, 16), property.FindPropertyRelative("m_Arg0"));
+            EditorGUI.PropertyField(new Rect(p.x, p.y + 18 * 3, p.width, 16), property.FindPropertyRelative("m_Arg1"));
+            EditorGUI.PropertyField(new Rect(p.x, p.y + 18 * 4, p.width, 16), property.FindPropertyRelative("m_Arg2"));
+            EditorGUI.indentLevel--;
+
+            property.serializedObject.ApplyModifiedProperties();
+        }
+
+        public override float GetPropertyHeight(SerializedProperty property, GUIContent label)
+        {
+            return (EditorGUIUtility.singleLineHeight + 2) * 5;
+        }
+    }
+#endif
+
+    [System.Serializable]
+    public class CustomMonitorItem
+    {
+        [SerializeField] private MonitorUI m_Text = null;
+        [SerializeField] private string m_Format = "";
+        [SerializeField] private NumericProperty m_Arg0 = null;
+        [SerializeField] private NumericProperty m_Arg1 = null;
+        [SerializeField] private NumericProperty m_Arg2 = null;
+
+        public void UpdateText()
+        {
+            if (m_Text)
+                m_Text.SetText(m_Format, m_Arg0.Get(), m_Arg1.Get(), m_Arg2.Get());
+        }
+    }
+}

Samples~/Performance Demo/NanoMonitor/Scripts/Utilities/CustomProfilerItem.cs.meta

@@ -0,0 +1,11 @@
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+  defaultReferences: []
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+  userData: 
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+  assetBundleVariant: 

Samples~/Performance Demo/NanoMonitor/Scripts/Utilities/NumericProperty.cs

@@ -0,0 +1,199 @@
+using System;
+using System.Collections.Generic;
+using System.Linq;
+using System.Reflection;
+using UnityEngine;
+using UnityEngine.Serialization;
+#if UNITY_EDITOR
+using UnityEditor;
+
+#endif
+
+namespace Coffee.NanoMonitor
+{
+#if UNITY_EDITOR
+    [CustomPropertyDrawer(typeof(NumericProperty))]
+    internal sealed class NumericPropertyDrawer : PropertyDrawer
+    {
+        private static Action<PropertyInfo> s_OnMenuSelected;
+        private static GenericMenu s_PropertyMenu;
+
+        private static readonly Dictionary<Type, string> s_SupportedTypes = new Dictionary<Type, string>
+        {
+            {typeof(bool), "bool"},
+            {typeof(sbyte), "sbyte"},
+            {typeof(short), "short"},
+            {typeof(int), "int"},
+            {typeof(long), "long"},
+            {typeof(byte), "byte"},
+            {typeof(ushort), "ushort"},
+            {typeof(uint), "uint"},
+            {typeof(ulong), "ulong"},
+            {typeof(float), "float"},
+            {typeof(double), "double"},
+            {typeof(decimal), "decimal"},
+        };
+
+        private static void Init()
+        {
+            if (s_PropertyMenu != null) return;
+
+            var properties = AppDomain.CurrentDomain.GetAssemblies()
+                .SelectMany(assembly => assembly.GetTypes())
+                .SelectMany(type => type.GetProperties(BindingFlags.Public | BindingFlags.NonPublic | BindingFlags.Static | BindingFlags.GetProperty))
+                .Where(pi => pi.GetMethod != null && s_SupportedTypes.ContainsKey(pi.PropertyType))
+                .OrderBy(pi => ConvertToMenuItem(pi, false))
+                .ToArray();
+
+            s_PropertyMenu = new GenericMenu();
+            s_PropertyMenu.AddItem(new GUIContent("No Property"), false, arg => s_OnMenuSelected?.Invoke(arg as PropertyInfo), null);
+            s_PropertyMenu.AddItem(new GUIContent("(Non Public Properties)/"), false, ()=>{});
+            s_PropertyMenu.AddSeparator("");
+
+            foreach (var pi in properties)
+            {
+                s_PropertyMenu.AddItem(new GUIContent(ConvertToMenuItem(pi, true)), false, arg => s_OnMenuSelected?.Invoke(arg as PropertyInfo), pi);
+            }
+        }
+
+        private static string ConvertToMenuItem(PropertyInfo p, bool propertyType)
+        {
+            var type = p.DeclaringType;
+            if (type == null) return "";
+            var category = p.GetMethod.IsPublic && type.IsPublic ? "" : "(Non Public Properties)/";
+            var typeName = type.FullName;
+            var asmName = type.Assembly.GetName().Name;
+            if (asmName == "UnityEngine.CoreModule")
+                asmName = "UnityEngine";
+            return propertyType
+                ? $"{category}{asmName}/{typeName}/{s_SupportedTypes[p.PropertyType]} {p.Name}"
+                : $"{category}{asmName}/{typeName}/{p.Name}";
+        }
+
+        public override void OnGUI(Rect position, SerializedProperty property, GUIContent label)
+        {
+            Init();
+            label = EditorGUI.BeginProperty(position, label, property);
+
+            var path = property.FindPropertyRelative("m_Path");
+            var split = path.stringValue.Split(';', ' ', ',');
+            var name = split.Length == 4 ? $"{split[0]}.{split[3]}" : "No Property";
+
+            position = EditorGUI.PrefixLabel(position, label);
+            if (GUI.Button(position, name, EditorStyles.popup))
+            {
+                s_OnMenuSelected = p =>
+                {
+                    path.stringValue = p == null ? "" : $"{p.DeclaringType?.FullName}, {p.DeclaringType?.Assembly.GetName().Name};{p.Name}";
+                    property.serializedObject.ApplyModifiedProperties();
+                };
+                s_PropertyMenu.DropDown(position);
+            }
+
+            EditorGUI.EndProperty();
+        }
+    }
+#endif
+
+    [Serializable]
+    public class NumericProperty : ISerializationCallbackReceiver
+    {
+        //################################
+        // Serialized Members.
+        //################################
+        [SerializeField] private string m_Path = "";
+
+
+        //################################
+        // Public Members.
+        //################################
+        public double Get()
+        {
+            return _get?.Invoke() ?? -1;
+        }
+
+
+        //################################
+        // Private Members.
+        //################################
+        private Func<double> _get = null;
+
+        private static PropertyInfo GetPropertyInfo(string path)
+        {
+            var p = path.Split(';');
+            if (p.Length != 2) return null;
+
+            var type = Type.GetType(p[0]);
+            if (type == null)
+            {
+                UnityEngine.Debug.LogException(new Exception($"Type '{p[0]}' is not found"));
+                return null;
+            }
+
+            var pInfo = type.GetProperty(p[1], BindingFlags.GetProperty | BindingFlags.Public | BindingFlags.Static);
+            if (pInfo == null)
+            {
+                UnityEngine.Debug.LogException(new Exception($"Member '{p[1]}' is not found in type '{type}'"));
+            }
+
+            return pInfo;
+        }
+
+        private static Func<double> CreateFunc(MethodInfo mInfo)
+        {
+            if (mInfo == null) return null;
+            switch (Type.GetTypeCode(mInfo.ReturnType))
+            {
+                case TypeCode.Boolean:
+                    var f_bool = (Func<bool>) mInfo.CreateDelegate(typeof(Func<bool>));
+                    return () => f_bool() ? 1 : 0;
+                case TypeCode.Byte:
+                    var f_byte = (Func<byte>) mInfo.CreateDelegate(typeof(Func<byte>));
+                    return () => f_byte();
+                case TypeCode.SByte:
+                    var f_sbyte = (Func<sbyte>) mInfo.CreateDelegate(typeof(Func<sbyte>));
+                    return () => f_sbyte();
+                case TypeCode.UInt16:
+                    var f_ushort = (Func<ushort>) mInfo.CreateDelegate(typeof(Func<ushort>));
+                    return () => f_ushort();
+                case TypeCode.UInt32:
+                    var f_uint = (Func<uint>) mInfo.CreateDelegate(typeof(Func<uint>));
+                    return () => f_uint();
+                case TypeCode.UInt64:
+                    var f_ulong = (Func<ulong>) mInfo.CreateDelegate(typeof(Func<ulong>));
+                    return () => f_ulong();
+                case TypeCode.Int16:
+                    var f_short = (Func<short>) mInfo.CreateDelegate(typeof(Func<short>));
+                    return () => f_short();
+                case TypeCode.Int32:
+                    var f_int = (Func<int>) mInfo.CreateDelegate(typeof(Func<int>));
+                    return () => f_int();
+                case TypeCode.Int64:
+                    var f_long = (Func<long>) mInfo.CreateDelegate(typeof(Func<long>));
+                    return () => f_long();
+                case TypeCode.Decimal:
+                    var f_decimal = (Func<decimal>) mInfo.CreateDelegate(typeof(Func<decimal>));
+                    return () => (double) f_decimal();
+                case TypeCode.Double:
+                    var f_double = (Func<double>) mInfo.CreateDelegate(typeof(Func<double>));
+                    return f_double;
+                case TypeCode.Single:
+                    var f_float = (Func<float>) mInfo.CreateDelegate(typeof(Func<float>));
+                    return () => f_float();
+                default:
+                    UnityEngine.Debug.LogException(new Exception(string.Format("Method '{1}.{0}' is not supported.", mInfo.Name, mInfo.DeclaringType)));
+                    return null;
+            }
+        }
+
+        void ISerializationCallbackReceiver.OnBeforeSerialize()
+        {
+        }
+
+        void ISerializationCallbackReceiver.OnAfterDeserialize()
+        {
+            var pInfo = GetPropertyInfo(m_Path);
+            _get = CreateFunc(pInfo?.GetMethod);
+        }
+    }
+}

Samples~/Performance Demo/NanoMonitor/Scripts/Utilities/NumericProperty.cs.meta

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Samples~/Performance Demo/NanoMonitor/Scripts/Utilities/StringBuilderExtensions.cs

@@ -0,0 +1,236 @@
+using System;
+using System.Runtime.CompilerServices;
+using System.Text;
+
+[assembly: InternalsVisibleTo("Coffee.NanoMonitor.Tests")]
+
+namespace Coffee.NanoMonitor
+{
+    internal static class StringBuilderExtensions
+    {
+        public static bool IsEqual(this StringBuilder sb, string other)
+        {
+            if (sb == null || other == null) return false;
+            if (sb.Length != other.Length) return false;
+
+            for (var i = 0; i < sb.Length; i++)
+            {
+                if (sb[i] != other[i]) return false;
+            }
+
+            return true;
+        }
+
+        public static void AppendFormatNoAlloc(this StringBuilder sb, string format, double arg0 = 0, double arg1 = 0, double arg2 = 0, double arg3 = 0)
+        {
+            for (var i = 0; i < format.Length; i++)
+            {
+                var c = format[i];
+
+                // Append formatted value
+                if (c == '{')
+                {
+                    i = GetFormat(format, i, out var argIndex, out var padding, out var precision, out var alignment);
+
+                    switch (argIndex)
+                    {
+                        case 0:
+                            sb.AppendDouble(arg0, padding, precision, alignment);
+                            break;
+                        case 1:
+                            sb.AppendDouble(arg1, padding, precision, alignment);
+                            break;
+                        case 2:
+                            sb.AppendDouble(arg2, padding, precision, alignment);
+                            break;
+                        case 3:
+                            sb.AppendDouble(arg3, padding, precision, alignment);
+                            break;
+                    }
+
+                    continue;
+                }
+
+                // Append character
+                sb.Append(c);
+            }
+        }
+
+        internal static void AppendInteger(this StringBuilder sb, double number, int padding, int precision, int alignment)
+        {
+            number = Math.Truncate(number);
+            var sign = number < 0;
+            number = sign ? -number : number;
+
+            var startIndex = sb.Length;
+            do
+            {
+                var n = Math.Truncate(number % 10);
+                number /= 10;
+
+                sb.Append((char) (n + 48));
+            } while (1 <= number || (sb.Length - startIndex) < padding);
+
+            if (sign)
+            {
+                sb.Append('-');
+            }
+
+            var endIndex = sb.Length - 1;
+
+            sb.Reverse(startIndex, endIndex);
+            sb.Alignment(alignment, startIndex, endIndex);
+        }
+
+        internal static void AppendDouble(this StringBuilder sb, double number, int padding, int precision, int alignment)
+        {
+            var integer = Math.Truncate(number);
+            var startIndex = sb.Length;
+            sb.AppendInteger(integer, padding, precision, 0);
+
+            if (0 < precision)
+            {
+                sb.Append('.');
+                number -= integer;
+                number = Math.Round(number, precision);
+                for (var p = 0; p < precision; p++)
+                {
+                    number *= 10;
+                    integer = (long) number;
+                    sb.Append((char) (integer + 48));
+                    number -= integer;
+                    number = Math.Round(number, precision);
+                }
+            }
+
+            sb.Alignment(alignment, startIndex, sb.Length - 1);
+        }
+
+        internal static void Reverse(this StringBuilder sb, int start, int end)
+        {
+            while (start < end)
+            {
+                var c = sb[start];
+                sb[start] = sb[end];
+                sb[end] = c;
+
+                start++;
+                end--;
+            }
+        }
+
+        internal static void Alignment(this StringBuilder sb, int alignment, int start, int end)
+        {
+            if (alignment == 0) return;
+
+            var len = end - start + 1;
+            if (0 < alignment && len < alignment)
+            {
+                sb.Append(' ', alignment - len);
+                for (var i = 0; i < len; i++)
+                {
+                    var c = sb[end - i];
+                    sb[end - i] = sb[start + alignment - i - 1];
+                    sb[start + alignment - i - 1] = c;
+                }
+            }
+            else if (alignment < 0 && len < -alignment)
+            {
+                sb.Append(' ', -alignment - len);
+            }
+        }
+
+        internal static int GetFormat(string format, int i, out int argIndex, out int padding, out int precision, out int alignment)
+        {
+            argIndex = -1;
+            padding = 0;
+            precision = 0;
+            alignment = 0;
+
+            var alignmentSign = false;
+            var readFlag = 0;
+
+            for (; i < format.Length; i++)
+            {
+                var c = format[i];
+
+                // End format
+                if (c == '}')
+                {
+                    return i;
+                }
+
+                // Start format
+                if (c == '{')
+                {
+                    readFlag = 1;
+                }
+
+                // After '{': Read argument index and format
+                else if (readFlag == 1)
+                {
+                    if ('0' <= c && c <= '3')
+                    {
+                        argIndex = c - 48;
+                    }
+                    else if (c == ',')
+                    {
+                        readFlag = 2;
+                    }
+                    else if (c == ':')
+                    {
+                        readFlag = 3;
+                    }
+                }
+
+                //After ',': Read alignment value
+                else if (readFlag == 2)
+                {
+                    if ('0' <= c && c <= '9')
+                    {
+                        alignment = alignment * 10 + (alignmentSign ? 48 - c : c - 48);
+                    }
+                    else if (c == '-')
+                    {
+                        alignmentSign = true;
+                    }
+                    else if (c == ':')
+                    {
+                        readFlag = 3;
+                    }
+                }
+
+                // After ':': Read format for integral
+                else if (readFlag == 3)
+                {
+                    if (c == '.')
+                    {
+                        precision = 0;
+                        readFlag = 4;
+                    }
+                    else if (c == '0')
+                    {
+                        padding++;
+                    }
+                    // Legacy mode
+                    else if ('1' <= c && c <= '9')
+                    {
+                        precision = c - 48;
+                    }
+                }
+
+                // After '.': Read decimal precision value
+                else if (readFlag == 4)
+                {
+                    if (c == '0')
+                    {
+                        precision++;
+                    }
+                }
+            }
+
+            argIndex = -1;
+            return i;
+        }
+    }
+}

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