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[csharp] Port of commit 3fd5ed22 - Fixed IK constraint NaN when a parent bone has zero scale.

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This commit is contained in:
Harald Csaszar 2023-04-05 10:43:58 +02:00
parent 3fd5ed2287
commit f5fb9b5aa2
1 changed files with 3 additions and 3 deletions
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6
spine-csharp/src/IkConstraint.cs
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@ -172,7 +172,7 @@ namespace Spine {
ty = targetY - bone.worldY; ty = targetY - bone.worldY;
break; break;
case TransformMode.NoRotationOrReflection: { case TransformMode.NoRotationOrReflection: {
float s = Math.Abs(pa * pd - pb * pc) / (pa * pa + pc * pc); float s = Math.Abs(pa * pd - pb * pc) / Math.Max(0.0001f, pa * pa + pc * pc);
float sa = pa / bone.skeleton.ScaleX; float sa = pa / bone.skeleton.ScaleX;
float sc = pc / bone.skeleton.ScaleY; float sc = pc / bone.skeleton.ScaleY;
pb = -sc * s * bone.skeleton.ScaleX; pb = -sc * s * bone.skeleton.ScaleX;
@ -182,7 +182,7 @@ namespace Spine {
} }
default: { default: {
float x = targetX - p.worldX, y = targetY - p.worldY; float x = targetX - p.worldX, y = targetY - p.worldY;
float d = pa * pd - pb * pc; float d = Math.Max(0.0001f, pa * pd - pb * pc);
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 +256,7 @@ namespace Spine {
b = pp.b; b = pp.b;
c = pp.c; c = pp.c;
d = pp.d; d = pp.d;
float id = 1 / (a * d - b * c), x = cwx - pp.worldX, y = cwy - pp.worldY; float id = 1 / Math.Max(0.0001f, a * d - b * c), x = cwx - pp.worldX, y = cwy - pp.worldY;
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) {