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view frustum center

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This commit is contained in:
Recep Aslantas
2017-12-31 17:17:39 +03:00
parent 2d0a3ad828
commit eaf45e489d
3 changed files with 33 additions and 0 deletions
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4
include/cglm/call/cam.h
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@@ -56,6 +56,10 @@ CGLM_EXPORT
void
glmc_frustum_corners(mat4 invMat, vec4 dest[8]);
CGLM_EXPORT
void
glmc_frustum_center(vec4 corners[8], vec4 dest);
#ifdef __cplusplus
}
#endif

23
include/cglm/cam.h
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@@ -503,4 +503,27 @@ glm_frustum_corners(mat4 invMat, vec4 dest[8]) {
glm_vec4_scale(dest[7], 1.0f / dest[7][3], dest[7]);
}
/*!
* @brief finds center of view frustum
*
* @param[in] corners view frustum corners
* @param[out] dest view frustum center
*/
CGLM_INLINE
void
glm_frustum_center(vec4 corners[8], vec4 dest) {
glm_vec4_broadcast(0.0f, dest);
glm_vec4_add(corners[0], dest, dest);
glm_vec4_add(corners[1], dest, dest);
glm_vec4_add(corners[2], dest, dest);
glm_vec4_add(corners[3], dest, dest);
glm_vec4_add(corners[4], dest, dest);
glm_vec4_add(corners[5], dest, dest);
glm_vec4_add(corners[6], dest, dest);
glm_vec4_add(corners[7], dest, dest);
glm_vec4_scale(dest, 0.125f, dest);
}
#endif /* cglm_vcam_h */

6
src/cam.c
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@@ -78,3 +78,9 @@ void
glmc_frustum_corners(mat4 invMat, vec4 dest[8]) {
glm_frustum_corners(invMat, dest);
}
CGLM_EXPORT
void
glmc_frustum_center(vec4 corners[8], vec4 dest) {
glm_frustum_center(corners, dest);
}