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Add support for mat4 * vec3
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2 changed files with 12 additions and 0 deletions
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@ -589,6 +589,7 @@ void QuatToMatrix (const quat_t q, vec_t *m, int homogenous, int vertical);
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void Mat4Transpose (const mat4_t a, mat4_t b);
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void Mat4Mult (const mat4_t a, const mat4_t b, mat4_t c);
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void Mat4MultVec (const mat4_t a, const vec3_t b, vec3_t c);
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// Column major matrix
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int Mat4Decompose (const mat4_t m, quat_t rot, vec3_t scale, vec3_t shear,
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vec3_t trans);
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@ -832,6 +832,17 @@ Mat4Mult (const mat4_t a, const mat4_t b, mat4_t c)
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}
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}
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void
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Mat4MultVec (const mat4_t a, const vec3_t b, vec3_t c)
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{
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int i;
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vec3_t tb;
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VectorCopy (b, tb);
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for (i = 0; i < 3; i++)
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c[i] = a[i + 0] * tb[0] + a[i + 4] * b[1] + a[i + 8] * b[2] + a[i +12];
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}
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int
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Mat4Decompose (const mat4_t m, quat_t rot, vec3_t scale, vec3_t shear,
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vec3_t trans)
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