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mat3_mulv: function behaviour to match with mat4

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Using mat3_mulv with the same input/output vector creates undesired results. 

Respective mat4_mulv function provides temporary vec3 'res'.
Updated this function to match behaviour of mat4.
This commit is contained in:
Harry Godden
2020-07-02 23:29:10 +01:00
committed by GitHub
parent 79c44fdbfa
commit 7274cee153
1 changed files with 5 additions and 3 deletions
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8
include/cglm/mat3.h
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@@ -228,9 +228,11 @@ glm_mat3_transpose(mat3 m) {
CGLM_INLINE
void
glm_mat3_mulv(mat3 m, vec3 v, vec3 dest) {
dest[0] = m[0][0] * v[0] + m[1][0] * v[1] + m[2][0] * v[2];
dest[1] = m[0][1] * v[0] + m[1][1] * v[1] + m[2][1] * v[2];
dest[2] = m[0][2] * v[0] + m[1][2] * v[1] + m[2][2] * v[2];
vec3 res;
res[0] = m[0][0] * v[0] + m[1][0] * v[1] + m[2][0] * v[2];
res[1] = m[0][1] * v[0] + m[1][1] * v[1] + m[2][1] * v[2];
res[2] = m[0][2] * v[0] + m[1][2] * v[1] + m[2][2] * v[2];
glm_vec3_copy(res, dest);
}
/*!