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2d: fix rotate2d and its friends

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This commit is contained in:
Recep Aslantas
2020-07-31 18:20:51 +03:00
parent b133c2e3e3
commit a12364d486
1 changed files with 30 additions and 24 deletions
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54
include/cglm/affine2d.h
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@@ -188,13 +188,13 @@ glm_rotate2d_make(mat3 m, float angle) {
s = sinf(angle);
c = cosf(angle);
m[0][0] = m[0][0] * c + m[1][0] * s;
m[0][1] = m[0][1] * c + m[1][1] * s;
m[0][2] = m[0][2] * c + m[1][2] * s;
m[1][0] = m[0][0] * -s + m[1][0] * c;
m[1][1] = m[0][1] * -s + m[1][1] * c;
m[1][2] = m[0][2] * -s + m[1][2] * c;
m[0][0] = c;
m[0][1] = s;
m[0][2] = 0;
m[1][0] = -s;
m[1][1] = c;
m[1][2] = 0;
m[2][0] = 0.0f;
m[2][1] = 0.0f;
@@ -210,18 +210,21 @@ glm_rotate2d_make(mat3 m, float angle) {
CGLM_INLINE
void
glm_rotate2d(mat3 m, float angle) {
float m00 = m[0][0], m10 = m[1][0],
m01 = m[0][1], m11 = m[1][1],
m02 = m[0][2], m12 = m[1][2];
float c, s;
s = sinf(angle);
c = cosf(angle);
m[0][0] = m[0][0] * c + m[1][0] * s;
m[0][1] = m[0][1] * c + m[1][1] * s;
m[0][2] = m[0][2] * c + m[1][2] * s;
m[1][0] = m[0][0] * -s + m[1][0] * c;
m[1][1] = m[0][1] * -s + m[1][1] * c;
m[1][2] = m[0][2] * -s + m[1][2] * c;
m[0][0] = m00 * c + m10 * s;
m[0][1] = m01 * c + m11 * s;
m[0][2] = m02 * c + m12 * s;
m[1][0] = m00 * -s + m10 * c;
m[1][1] = m01 * -s + m11 * c;
m[1][2] = m02 * -s + m12 * c;
}
/*!
@@ -235,22 +238,25 @@ glm_rotate2d(mat3 m, float angle) {
CGLM_INLINE
void
glm_rotate2d_to(mat3 m, float angle, mat3 dest) {
float m00 = m[0][0], m10 = m[1][0],
m01 = m[0][1], m11 = m[1][1],
m02 = m[0][2], m12 = m[1][2];
float c, s;
s = sinf(angle);
c = cosf(angle);
dest[0][0] = m[0][0] * c + m[1][0] * s;
dest[0][1] = m[0][1] * c + m[1][1] * s;
dest[0][2] = m[0][2] * c + m[1][2] * s;
dest[0][0] = m00 * c + m10 * s;
dest[0][1] = m01 * c + m11 * s;
dest[0][2] = m02 * c + m12 * s;
dest[1][0] = m00 * -s + m10 * c;
dest[1][1] = m01 * -s + m11 * c;
dest[1][2] = m02 * -s + m12 * c;
dest[1][0] = m[0][0] * -s + m[1][0] * c;
dest[1][1] = m[0][1] * -s + m[1][1] * c;
dest[1][2] = m[0][2] * -s + m[1][2] * c;
dest[2][0] = m[0][0];
dest[2][1] = m[0][1];
dest[2][2] = m[0][2];
dest[2][0] = m[2][0];
dest[2][1] = m[2][1];
dest[2][2] = m[2][2];
}
#endif /* cglm_affine2d_h */