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Fixed IK constraint NaN when a parent bone has zero scale.

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This commit is contained in:
Nathan Sweet 2023-04-04 20:07:21 -04:00
parent 5bea236326
commit 3fd5ed2287
1 changed files with 3 additions and 3 deletions
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6
spine-libgdx/spine-libgdx/src/com/esotericsoftware/spine/IkConstraint.java
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@ -186,7 +186,7 @@ public class IkConstraint implements Updatable {
ty = targetY - bone.worldY;
break;
case 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 sc = pc / bone.skeleton.scaleY;
pb = -sc * s * bone.skeleton.scaleX;
@ -195,7 +195,7 @@ public class IkConstraint implements Updatable {
// Fall through.
default:
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;
ty = (y * pa - x * pc) / d - bone.ay;
}
@ -264,7 +264,7 @@ public class IkConstraint implements Updatable {
b = pp.b;
c = pp.c;
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 l1 = (float)Math.sqrt(dx * dx + dy * dy), l2 = child.data.length * csx, a1, a2;
if (l1 < 0.0001f) {