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implement project zo

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This commit is contained in:
Recep Aslantas
2021-08-16 14:16:43 +03:00
parent 4530e0381b
commit 29c3837672
8 changed files with 86 additions and 13 deletions
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2
include/cglm/call/clipspace/persp_lh_zo.h
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@@ -11,7 +11,7 @@
extern "C" {
#endif
#include "../cglm.h"
#include "../../cglm.h"
CGLM_EXPORT
void

4
include/cglm/call/clipspace/project_no.h
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@@ -17,6 +17,10 @@ CGLM_EXPORT
void
glmc_unprojecti_no(vec3 pos, mat4 invMat, vec4 vp, vec3 dest);
CGLM_EXPORT
void
glmc_project_no(vec3 pos, mat4 m, vec4 vp, vec3 dest);
#ifdef __cplusplus
}
#endif

4
include/cglm/call/clipspace/project_zo.h
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@@ -17,6 +17,10 @@ CGLM_EXPORT
void
glmc_unprojecti_zo(vec3 pos, mat4 invMat, vec4 vp, vec3 dest);
CGLM_EXPORT
void
glmc_project_zo(vec3 pos, mat4 m, vec4 vp, vec3 dest);
#ifdef __cplusplus
}
#endif

29
include/cglm/clipspace/project_no.h
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@@ -54,4 +54,33 @@ glm_unprojecti_no(vec3 pos, mat4 invMat, vec4 vp, vec3 dest) {
glm_vec3(v, dest);
}
/*!
* @brief map object coordinates to window coordinates
*
* Computing MVP:
* glm_mat4_mul(proj, view, viewProj);
* glm_mat4_mul(viewProj, model, MVP);
*
* @param[in] pos object coordinates
* @param[in] m MVP matrix
* @param[in] vp viewport as [x, y, width, height]
* @param[out] dest projected coordinates
*/
CGLM_INLINE
void
glm_project_no(vec3 pos, mat4 m, vec4 vp, vec3 dest) {
CGLM_ALIGN(16) vec4 pos4;
glm_vec4(pos, 1.0f, pos4);
glm_mat4_mulv(m, pos4, pos4);
glm_vec4_scale(pos4, 1.0f / pos4[3], pos4); /* pos = pos / pos.w */
glm_vec4_scale(pos4, 0.5f, pos4);
glm_vec4_adds(pos4, 0.5f, pos4);
dest[0] = pos4[0] * vp[2] + vp[0];
dest[1] = pos4[1] * vp[3] + vp[1];
dest[2] = pos4[2];
}
#endif /* cglm_project_no_h */

31
include/cglm/clipspace/project_zo.h
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@@ -54,4 +54,35 @@ glm_unprojecti_zo(vec3 pos, mat4 invMat, vec4 vp, vec3 dest) {
glm_vec3(v, dest);
}
/*!
* @brief map object coordinates to window coordinates
*
* Computing MVP:
* glm_mat4_mul(proj, view, viewProj);
* glm_mat4_mul(viewProj, model, MVP);
*
* @param[in] pos object coordinates
* @param[in] m MVP matrix
* @param[in] vp viewport as [x, y, width, height]
* @param[out] dest projected coordinates
*/
CGLM_INLINE
void
glm_project_no(vec3 pos, mat4 m, vec4 vp, vec3 dest) {
CGLM_ALIGN(16) vec4 pos4;
glm_vec4(pos, 1.0f, pos4);
glm_mat4_mulv(m, pos4, pos4);
glm_vec4_scale(pos4, 1.0f / pos4[3], pos4); /* pos = pos / pos.w */
dest[2] = pos4[2];
glm_vec4_scale(pos4, 0.5f, pos4);
glm_vec4_adds(pos4, 0.5f, pos4);
dest[0] = pos4[0] * vp[2] + vp[0];
dest[1] = pos4[1] * vp[3] + vp[1];
}
#endif /* cglm_project_zo_h */

17
include/cglm/project.h
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@@ -107,18 +107,11 @@ glm_unproject(vec3 pos, mat4 m, vec4 vp, vec3 dest) {
CGLM_INLINE
void
glm_project(vec3 pos, mat4 m, vec4 vp, vec3 dest) {
CGLM_ALIGN(16) vec4 pos4, vone = GLM_VEC4_ONE_INIT;
glm_vec4(pos, 1.0f, pos4);
glm_mat4_mulv(m, pos4, pos4);
glm_vec4_scale(pos4, 1.0f / pos4[3], pos4); /* pos = pos / pos.w */
glm_vec4_add(pos4, vone, pos4);
glm_vec4_scale(pos4, 0.5f, pos4);
dest[0] = pos4[0] * vp[2] + vp[0];
dest[1] = pos4[1] * vp[3] + vp[1];
dest[2] = pos4[2];
#if CGLM_CONFIG_CLIP_CONTROL & CGLM_CLIP_CONTROL_ZO_BIT
glm_project_zo(pos, m, vp, dest);
#elif CGLM_CONFIG_CLIP_CONTROL & CGLM_CLIP_CONTROL_NO_BIT
glm_project_no(pos, m, vp, dest);
#endif
}
#endif /* cglm_project_h */