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[cpp] Fix NaN in IKConstraint due to fp precision.

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dd - r * r might result in a negative value, even if dd == r * r, depending on compiler optimizations and operation order.
This commit is contained in:
Mario Zechner 2024-08-06 16:39:01 +02:00
parent 1716baae68
commit 853b5ee165
1 changed files with 1 additions and 1 deletions
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2
spine-cpp/spine-cpp/src/spine/IkConstraint.cpp
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@ -213,7 +213,7 @@ void IkConstraint::apply(Bone &parent, Bone &child, float targetX, float targetY
r0 = q / c2;
r1 = c0 / q;
r = MathUtil::abs(r0) < MathUtil::abs(r1) ? r0 : r1;
if (r * r <= dd) {
if (dd - r * r >= 0) {
y = MathUtil::sqrt(dd - r * r) * bendDir;
a1 = ta - MathUtil::atan2(y, r);
a2 = MathUtil::atan2(y / psy, (r - l1) / psx);