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[csharp] Port of commit e04e7b5. Adjusted fix for IK constraint NaN when parent has zero scale.

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This commit is contained in:
Harald Csaszar 2023-04-06 11:05:14 +02:00
parent 463e18596c
commit 210dc04109
1 changed files with 10 additions and 4 deletions
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10
spine-csharp/src/IkConstraint.cs
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@ -182,9 +182,14 @@ namespace Spine {
} }
default: { default: {
float x = targetX - p.worldX, y = targetY - p.worldY; float x = targetX - p.worldX, y = targetY - p.worldY;
float d = Math.Max(0.0001f, pa * pd - pb * pc); float d = pa * pd - pb * pc;
if (Math.Abs(d) <= 0.0001f) {
tx = 0;
ty = 0;
} else {
tx = (x * pd - y * pb) / d - bone.ax; tx = (x * pd - y * pb) / d - bone.ax;
ty = (y * pa - x * pc) / d - bone.ay; ty = (y * pa - x * pc) / d - bone.ay;
}
break; break;
} }
} }
@ -256,7 +261,8 @@ namespace Spine {
b = pp.b; b = pp.b;
c = pp.c; c = pp.c;
d = pp.d; d = pp.d;
float id = 1 / Math.Max(0.0001f, a * d - b * c), x = cwx - pp.worldX, y = cwy - pp.worldY; float id = a * d - b * c, x = cwx - pp.worldX, y = cwy - pp.worldY;
id = Math.Abs(id) <= 0.0001f ? 0 : 1 / id;
float dx = (x * d - y * b) * id - px, dy = (y * a - x * c) * id - py; float dx = (x * d - y * b) * id - px, dy = (y * a - x * c) * id - py;
float l1 = (float)Math.Sqrt(dx * dx + dy * dy), l2 = child.data.length * csx, a1, a2; float l1 = (float)Math.Sqrt(dx * dx + dy * dy), l2 = child.data.length * csx, a1, a2;
if (l1 < 0.0001f) { if (l1 < 0.0001f) {