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13 lines
306 B
C
13 lines
306 B
C
#include <c3d/maths.h>
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C3D_FVec Quat_CrossFVec3(C3D_FQuat q, C3D_FVec v)
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{
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C3D_FVec qv = FVec3_New(q.i, q.j, q.k);
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C3D_FVec uv = FVec3_Cross(qv, v);
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C3D_FVec uuv = FVec3_Cross(qv, uv);
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uv = FVec3_Scale(uv, 2.0f * q.r);
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uuv = FVec3_Scale(uuv, 2.0f);
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return FVec3_Add(v, FVec3_Add(uv, uuv));
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}
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