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Line支持Clip

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This commit is contained in:
monitor1394
2023-05-09 13:25:42 +08:00
parent c29a22c576
commit 29c9f59762
3 changed files with 72 additions and 13 deletions
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34
Runtime/XUGL/UGLHelper.cs
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@@ -133,8 +133,8 @@ namespace XUGL
cp2 = ep - (nep - sp).normalized * diff;
if (limit) cp2.y = ep.y;
}
int segment = (int) (dist / (smoothness <= 0 ? 2f : smoothness));
if (segment < 1) segment = (int) (dist / 0.5f);
int segment = (int)(dist / (smoothness <= 0 ? 2f : smoothness));
if (segment < 1) segment = (int)(dist / 0.5f);
if (segment < 4) segment = 4;
GetBezierList2(ref posList, sp, ep, segment, cp1, cp2);
if (posList.Count < 2)
@@ -154,7 +154,7 @@ namespace XUGL
Vector3 cp2 = sp + dist / k * dir * (k - 1);
cp1.x = sp.x;
cp2.x = ep.x;
int segment = (int) (dist / (smoothness <= 0 ? 2f : smoothness));
int segment = (int)(dist / (smoothness <= 0 ? 2f : smoothness));
GetBezierList2(ref posList, sp, ep, segment, cp1, cp2);
if (posList.Count < 2)
{
@@ -169,7 +169,7 @@ namespace XUGL
List<Vector3> list = new List<Vector3>();
for (int i = 0; i < segment; i++)
{
list.Add(GetBezier(i / (float) segment, sp, cp, ep));
list.Add(GetBezier(i / (float)segment, sp, cp, ep));
}
list.Add(ep);
return list;
@@ -185,7 +185,7 @@ namespace XUGL
}
for (int i = 0; i < segment; i++)
{
posList.Add((GetBezier2(i / (float) segment, sp, cp, cp2, ep)));
posList.Add((GetBezier2(i / (float)segment, sp, cp, cp2, ep)));
}
posList.Add(ep);
}
@@ -273,6 +273,30 @@ namespace XUGL
return true;
}
/// <summary>
/// 获得两直线的交点
/// </summary>
/// <param name="p1">线段1起点</param>
/// <param name="p2">线段1终点</param>
/// <param name="p3">线段2起点</param>
/// <param name="p4">线段2终点</param>
/// <param name="intersection">相交点。当不相交时为初始值</param>
/// <returns>相交则返回 true, 否则返回 false</returns>
public static bool GetIntersection(Vector3 p1, Vector3 p2, Vector3 p3, Vector3 p4, ref List<Vector3> intersection)
{
var d = (p2.x - p1.x) * (p4.y - p3.y) - (p2.y - p1.y) * (p4.x - p3.x);
if (d == 0)
return false;
var u = ((p3.x - p1.x) * (p4.y - p3.y) - (p3.y - p1.y) * (p4.x - p3.x)) / d;
var v = ((p3.x - p1.x) * (p2.y - p1.y) - (p3.y - p1.y) * (p2.x - p1.x)) / d;
if (u < 0 || u > 1 || v < 0 || v > 1)
return false;
intersection.Add(new Vector3(p1.x + u * (p2.x - p1.x), p1.y + u * (p2.y - p1.y)));
return true;
}
/// <summary>
/// 三个点画线段所需要的六个关键点
/// </summary>