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2d: add scale2d and its friends

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This commit is contained in:
Recep Aslantas
2020-07-31 13:49:33 +03:00
parent 9b13b2f872
commit 0127d30fa8
5 changed files with 253 additions and 5 deletions
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81
include/cglm/affine2d.h
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@@ -27,7 +27,7 @@
* and stores result in same matrix
*
* @param[in, out] m affine transfrom
* @param[in] v translate vector [x, y, z]
* @param[in] v translate vector [x, y]
*/
CGLM_INLINE
void
@@ -44,7 +44,7 @@ glm_translate2d(mat3 m, vec2 v) {
* source matrix will remain same
*
* @param[in] m affine transfrom
* @param[in] v translate vector [x, y, z]
* @param[in] v translate vector [x, y]
* @param[out] dest translated matrix
*/
CGLM_INLINE
@@ -86,7 +86,7 @@ glm_translate2d_y(mat3 m, float y) {
* @brief creates NEW translate 2d transform matrix by v vector
*
* @param[out] m affine transfrom
* @param[in] v translate vector [x, y, z]
* @param[in] v translate vector [x, y]
*/
CGLM_INLINE
void
@@ -96,5 +96,80 @@ glm_translate2d_make(mat3 m, vec2 v) {
m[2][1] = v[1];
}
/*!
* @brief scale existing 2d transform matrix by v vector
* and store result in dest
*
* @param[in] m affine transfrom
* @param[in] v scale vector [x, y]
* @param[out] dest scaled matrix
*/
CGLM_INLINE
void
glm_scale2d_to(mat3 m, vec2 v, mat3 dest) {
dest[0][0] = m[0][0] * v[0];
dest[0][1] = m[0][1] * v[0];
dest[0][2] = m[0][2] * v[0];
dest[1][0] = m[1][0] * v[1];
dest[1][1] = m[1][1] * v[1];
dest[1][2] = m[1][2] * v[1];
dest[2][0] = m[2][0];
dest[2][1] = m[2][1];
dest[2][2] = m[2][2];
}
/*!
* @brief creates NEW 2d scale matrix by v vector
*
* @param[out] m affine transfrom
* @param[in] v scale vector [x, y]
*/
CGLM_INLINE
void
glm_scale2d_make(mat3 m, vec2 v) {
glm_mat3_identity(m);
m[0][0] = v[0];
m[1][1] = v[1];
}
/*!
* @brief scales existing 2d transform matrix by v vector
* and stores result in same matrix
*
* @param[in, out] m affine transfrom
* @param[in] v scale vector [x, y]
*/
CGLM_INLINE
void
glm_scale2d(mat3 m, vec2 v) {
m[0][0] = m[0][0] * v[0];
m[0][1] = m[0][1] * v[0];
m[0][2] = m[0][2] * v[0];
m[1][0] = m[1][0] * v[1];
m[1][1] = m[1][1] * v[1];
m[1][2] = m[1][2] * v[1];
}
/*!
* @brief applies uniform scale to existing 2d transform matrix v = [s, s]
* and stores result in same matrix
*
* @param[in, out] m affine transfrom
* @param[in] s scale factor
*/
CGLM_INLINE
void
glm_scale2d_uni(mat3 m, float s) {
m[0][0] = m[0][0] * s;
m[0][1] = m[0][1] * s;
m[0][2] = m[0][2] * s;
m[1][0] = m[1][0] * s;
m[1][1] = m[1][1] * s;
m[1][2] = m[1][2] * s;
}
#endif /* cglm_affine2d_h */

16
include/cglm/call/affine2d.h
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@@ -33,6 +33,22 @@ CGLM_EXPORT
void
glmc_translate2d_y(mat3 m, float to);
CGLM_EXPORT
void
glmc_scale2d_to(mat3 m, vec2 v, mat3 dest);
CGLM_EXPORT
void
glmc_scale2d_make(mat3 m, vec2 v);
CGLM_EXPORT
void
glmc_scale2d(mat3 m, vec2 v);
CGLM_EXPORT
void
glmc_scale2d_uni(mat3 m, float s);
#ifdef __cplusplus
}
#endif