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update raymath.h function QuaternionMultiply

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the multiplication algorithm was slightly off
previously when combining quaternion rotations objects would shrink
now they rotate as expected

trying to get around the issue by using QuaternionToMatrix then QuaternionTransform doesn't work, and I'm not sure why
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0_stamina 2026-04-05 17:30:36 -07:00 committed by GitHub
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src/raymath.h
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@ -2225,9 +2225,9 @@ RMAPI Quaternion QuaternionMultiply(Quaternion q1, Quaternion q2)
float qax = q1.x, qay = q1.y, qaz = q1.z, qaw = q1.w; float qax = q1.x, qay = q1.y, qaz = q1.z, qaw = q1.w;
float qbx = q2.x, qby = q2.y, qbz = q2.z, qbw = q2.w; float qbx = q2.x, qby = q2.y, qbz = q2.z, qbw = q2.w;
result.x = qax*qbw + qaw*qbx + qay*qbz - qaz*qby; result.x = qax*qbw + qaw*qbx + qaz*qby - qay*qbz;
result.y = qay*qbw + qaw*qby + qaz*qbx - qax*qbz; result.y = qay*qbw + qaw*qby + qax*qbz - qaz*qbx;
result.z = qaz*qbw + qaw*qbz + qax*qby - qay*qbx; result.z = qaz*qbw + qaw*qbz + qay*qbx - qax*qby;
result.w = qaw*qbw - qax*qbx - qay*qby - qaz*qbz; result.w = qaw*qbw - qax*qbx - qay*qby - qaz*qbz;
return result; return result;