foldcc/ParticleEffectForUGUI
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fix: UI/Additive shader does not support RectMask2D softness.

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mob-sakai
2026-06-24 12:02:42 +09:00
parent de80249552
commit 5aff2b480a
1 changed files with 43 additions and 10 deletions
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51
Shaders/UIAdditive.shader
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@@ -40,12 +40,8 @@
Lighting Off
ZWrite Off
ZTest [unity_GUIZTestMode]
Fog
{
Mode Off
}
Fog { Mode Off }
Blend One One
ColorMask [_ColorMask]
Pass
@@ -76,6 +72,7 @@
fixed4 color : COLOR;
float2 texcoord : TEXCOORD0;
float4 worldPosition : TEXCOORD1;
float4 mask : TEXCOORD2;
UNITY_VERTEX_OUTPUT_STEREO
};
@@ -84,16 +81,43 @@
float4 _MainTex_ST;
fixed4 _TextureSampleAdd;
float4 _ClipRect;
float _UIMaskSoftnessX;
float _UIMaskSoftnessY;
int _UIVertexColorAlwaysGammaSpace;
half3 _UIGammaToLinear(half3 value)
{
half3 low = 0.0849710 * value - 0.000163029;
half3 high = value * (value * (value * 0.265885 + 0.736584) - 0.00980184) + 0.00319697;
// We should be 0.5 away from any actual gamma value stored in an 8 bit channel
const half3 split = (half3)0.0725490; // Equals 18.5 / 255
return (value < split) ? low : high;
}
v2f vert(appdata_t v)
{
v2f OUT;
UNITY_SETUP_INSTANCE_ID(v);
UNITY_INITIALIZE_VERTEX_OUTPUT_STEREO(OUT);
float4 vPosition = UnityObjectToClipPos(v.vertex);
OUT.worldPosition = v.vertex;
OUT.vertex = UnityObjectToClipPos(OUT.worldPosition);
OUT.vertex = vPosition;
OUT.texcoord = TRANSFORM_TEX(v.texcoord, _MainTex);
float2 pixelSize = vPosition.w;
pixelSize /= float2(1, 1) * abs(mul((float2x2)UNITY_MATRIX_P, _ScreenParams.xy));
float4 clampedRect = clamp(_ClipRect, -2e10, 2e10);
float2 maskUV = (v.vertex.xy - clampedRect.xy) / (clampedRect.zw - clampedRect.xy);
OUT.texcoord = TRANSFORM_TEX(v.texcoord.xy, _MainTex);
OUT.mask = float4(v.vertex.xy * 2 - clampedRect.xy - clampedRect.zw, 0.25 / (0.25 * half2(_UIMaskSoftnessX, _UIMaskSoftnessY) + abs(pixelSize.xy)));
if (_UIVertexColorAlwaysGammaSpace)
{
#ifndef UNITY_COLORSPACE_GAMMA
v.color.rgb = _UIGammaToLinear(v.color.rgb);
#endif
}
OUT.color = v.color * _Color;
return OUT;
@@ -101,10 +125,18 @@
fixed4 frag(v2f IN) : SV_Target
{
half4 color = (tex2D(_MainTex, IN.texcoord) + _TextureSampleAdd) * IN.color;
//Round up the alpha color coming from the interpolator (to 1.0/256.0 steps)
//The incoming alpha could have numerical instability, which makes it very sensible to
//HDR color transparency blend, when it blends with the world's texture.
const half alphaPrecision = half(0xff);
const half invAlphaPrecision = half(1.0 / alphaPrecision);
IN.color.a = round(IN.color.a * alphaPrecision) * invAlphaPrecision;
half4 color = IN.color * (tex2D(_MainTex, IN.texcoord) + _TextureSampleAdd);
#ifdef UNITY_UI_CLIP_RECT
color.a *= UnityGet2DClipping(IN.worldPosition.xy, _ClipRect);
half2 m = saturate((_ClipRect.zw - _ClipRect.xy - abs(IN.mask.xy)) * IN.mask.zw);
color.a *= m.x * m.y;
#endif
#ifdef UNITY_UI_ALPHACLIP
@@ -112,6 +144,7 @@
#endif
color.rgb *= color.a;
return color;
}
ENDCG