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[cpp] Fix 1-bone IK, see #1692.

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This commit is contained in:
badlogic 2020-06-03 17:38:44 +02:00
parent 93d78523c4
commit 2b2d32f7a2
1 changed files with 6 additions and 4 deletions
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10
spine-cpp/spine-cpp/src/spine/IkConstraint.cpp
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@ -56,10 +56,12 @@ void IkConstraint::apply(Bone &bone, float targetX, float targetY, bool compress
ty = targetY - bone._worldY;
break;
case TransformMode_NoRotationOrReflection: {
rotationIK += MathUtil::atan2(pc, pa) * MathUtil::Rad_Deg;
float ps = MathUtil::abs(pa * pd - pb * pc) / (pa * pa + pc * pc);
pb = -pc * ps;
pd = pa * ps;
float s = MathUtil::abs(pa * pd - pb * pc) / (pa * pa + pc * pc);
float sa = pa / bone._skeleton.getScaleX();
float sc = pc / bone._skeleton.getScaleY();
pb = -sc * s * bone._skeleton.getScaleX();
pd = sa * s * bone._skeleton.getScaleY();
rotationIK += MathUtil::atan2(sc, sa) * MathUtil::Rad_Deg;
}
default:
float x = targetX - p->_worldX, y = targetY - p->_worldY;