97 lines
2.5 KiB
C
97 lines
2.5 KiB
C
|
/*
|
||
|
|
* Copyright (c), Recep Aslantas.
|
||
|
|
*
|
||
|
|
* MIT License (MIT), http://opensource.org/licenses/MIT
|
||
|
|
* Full license can be found in the LICENSE file
|
||
|
|
*/
|
||
|
|
|
||
|
|
/*
|
||
|
|
Functions:
|
||
|
|
CGLM_INLINE vec3s glms_unprojecti_no(vec3s pos, mat4s invMat, vec4s vp, vec3 dest)
|
||
|
|
CGLM_INLINE vec3s glms_project_no(vec3s pos, mat4s m, vec4s vp, vec3s dest)
|
||
|
|
*/
|
||
|
|
|
||
|
|
#ifndef cglms_project_zo_h
|
||
|
|
#define cglms_project_zo_h
|
||
|
|
|
||
|
|
#include "../../common.h"
|
||
|
|
#include "../../types-struct.h"
|
||
|
|
#include "../../plane.h"
|
||
|
|
#include "../../cam.h"
|
||
|
|
|
||
|
|
/*!
|
||
|
|
* @brief maps the specified viewport coordinates into specified space [1]
|
||
|
|
* the matrix should contain projection matrix.
|
||
|
|
*
|
||
|
|
* if you don't have ( and don't want to have ) an inverse matrix then use
|
||
|
|
* glm_unproject version. You may use existing inverse of matrix in somewhere
|
||
|
|
* else, this is why glm_unprojecti exists to save save inversion cost
|
||
|
|
*
|
||
|
|
* [1] space:
|
||
|
|
* 1- if m = invProj: View Space
|
||
|
|
* 2- if m = invViewProj: World Space
|
||
|
|
* 3- if m = invMVP: Object Space
|
||
|
|
*
|
||
|
|
* You probably want to map the coordinates into object space
|
||
|
|
* so use invMVP as m
|
||
|
|
*
|
||
|
|
* Computing viewProj:
|
||
|
|
* glm_mat4_mul(proj, view, viewProj);
|
||
|
|
* glm_mat4_mul(viewProj, model, MVP);
|
||
|
|
* glm_mat4_inv(viewProj, invMVP);
|
||
|
|
*
|
||
|
|
* @param[in] pos point/position in viewport coordinates
|
||
|
|
* @param[in] invMat matrix (see brief)
|
||
|
|
* @param[in] vp viewport as [x, y, width, height]
|
||
|
|
*
|
||
|
|
* @returns unprojected coordinates
|
||
|
|
*/
|
||
|
|
CGLM_INLINE
|
||
|
|
vec3s
|
||
|
|
glms_unprojecti_zo(vec3s pos, mat4s invMat, vec4s vp, vec3 dest) {
|
||
|
|
vec3s dest;
|
||
|
|
glm_unprojecti_zo(pos.raw, invMat.raw, vp.raw, dest.raw);
|
||
|
|
return 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]
|
||
|
|
*
|
||
|
|
* @returns projected coordinates
|
||
|
|
*/
|
||
|
|
CGLM_INLINE
|
||
|
|
vec3s
|
||
|
|
glms_project_zo(vec3s pos, mat4s m, vec4s vp, vec3 dest) {
|
||
|
|
vec3s dest;
|
||
|
|
glm_project_zo(pos.raw, m.raw, vp.raw, dest.raw);
|
||
|
|
return dest;
|
||
|
|
}
|
||
|
|
|
||
|
|
/*!
|
||
|
|
* @brief map object's z coordinate to window coordinates
|
||
|
|
*
|
||
|
|
* Computing MVP:
|
||
|
|
* glm_mat4_mul(proj, view, viewProj);
|
||
|
|
* glm_mat4_mul(viewProj, model, MVP);
|
||
|
|
*
|
||
|
|
* @param[in] v object coordinates
|
||
|
|
* @param[in] m MVP matrix
|
||
|
|
*
|
||
|
|
* @returns projected z coordinate
|
||
|
|
*/
|
||
|
|
CGLM_INLINE
|
||
|
|
vec3s
|
||
|
|
glms_project_z_zo(vec3s v, mat4s m) {
|
||
|
|
return glm_project_z_zo(v.raw, m.raw);
|
||
|
|
}
|
||
|
|
|
||
|
|
#endif /* cglm_project_zo_h */
|