184 lines
5.1 KiB
C
184 lines
5.1 KiB
C
/*
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* Copyright (c), Recep Aslantas.
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*
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* MIT License (MIT), http://opensource.org/licenses/MIT
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* Full license can be found in the LICENSE file
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*/
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/*
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Functions:
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CGLM_INLINE void glm_ortho_rh_no(float left, float right,
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float bottom, float top,
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float nearZ, float farZ,
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mat4 dest)
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CGLM_INLINE void glm_ortho_aabb_rh_no(vec3 box[2], mat4 dest)
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CGLM_INLINE void glm_ortho_aabb_p_rh_no(vec3 box[2],
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float padding,
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mat4 dest)
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CGLM_INLINE void glm_ortho_aabb_pz_rh_no(vec3 box[2],
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float padding,
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mat4 dest)
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CGLM_INLINE void glm_ortho_default_rh_no(float aspect,
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mat4 dest)
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CGLM_INLINE void glm_ortho_default_s_rh_no(float aspect,
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float size,
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mat4 dest)
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*/
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#ifndef cglm_ortho_rh_no_h
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#define cglm_ortho_rh_no_h
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#include "../common.h"
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#include "../plane.h"
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#include "../mat4.h"
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/*!
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* @brief set up orthographic projection matrix
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* with a right-hand coordinate system and a
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* clip-space of [-1, 1].
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*
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* @param[in] left viewport.left
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* @param[in] right viewport.right
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* @param[in] bottom viewport.bottom
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* @param[in] top viewport.top
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* @param[in] nearZ near clipping plane
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* @param[in] farZ far clipping plane
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* @param[out] dest result matrix
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*/
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CGLM_INLINE
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void
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glm_ortho_rh_no(float left, float right,
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float bottom, float top,
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float nearZ, float farZ,
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mat4 dest) {
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float rl, tb, fn;
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glm_mat4_zero(dest);
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rl = 1.0f / (right - left);
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tb = 1.0f / (top - bottom);
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fn =-1.0f / (farZ - nearZ);
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dest[0][0] = 2.0f * rl;
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dest[1][1] = 2.0f * tb;
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dest[2][2] = 2.0f * fn;
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dest[3][0] =-(right + left) * rl;
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dest[3][1] =-(top + bottom) * tb;
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dest[3][2] = (farZ + nearZ) * fn;
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dest[3][3] = 1.0f;
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}
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/*!
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* @brief set up orthographic projection matrix using bounding box
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* with a right-hand coordinate system and a
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* clip-space of [-1, 1].
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*
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* bounding box (AABB) must be in view space
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*
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* @param[in] box AABB
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* @param[out] dest result matrix
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*/
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CGLM_INLINE
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void
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glm_ortho_aabb_rh_no(vec3 box[2], mat4 dest) {
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glm_ortho_rh_no(box[0][0], box[1][0],
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box[0][1], box[1][1],
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-box[1][2], -box[0][2],
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dest);
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}
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/*!
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* @brief set up orthographic projection matrix using bounding box
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* with a right-hand coordinate system and a
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* clip-space of [-1, 1].
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*
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* bounding box (AABB) must be in view space
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*
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* @param[in] box AABB
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* @param[in] padding padding
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* @param[out] dest result matrix
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*/
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CGLM_INLINE
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void
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glm_ortho_aabb_p_rh_no(vec3 box[2], float padding, mat4 dest) {
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glm_ortho_rh_no(box[0][0] - padding, box[1][0] + padding,
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box[0][1] - padding, box[1][1] + padding,
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-(box[1][2] + padding), -(box[0][2] - padding),
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dest);
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}
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/*!
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* @brief set up orthographic projection matrix using bounding box
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* with a right-hand coordinate system and a
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* clip-space of [-1, 1].
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*
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* bounding box (AABB) must be in view space
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*
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* @param[in] box AABB
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* @param[in] padding padding for near and far
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* @param[out] dest result matrix
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*/
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CGLM_INLINE
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void
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glm_ortho_aabb_pz_rh_no(vec3 box[2], float padding, mat4 dest) {
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glm_ortho_rh_no(box[0][0], box[1][0],
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box[0][1], box[1][1],
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-(box[1][2] + padding), -(box[0][2] - padding),
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dest);
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}
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/*!
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* @brief set up unit orthographic projection matrix
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* with a right-hand coordinate system and a
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* clip-space of [-1, 1].
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*
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* @param[in] aspect aspect ration ( width / height )
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* @param[out] dest result matrix
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*/
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CGLM_INLINE
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void
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glm_ortho_default_rh_no(float aspect, mat4 dest) {
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if (aspect >= 1.0f) {
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glm_ortho_rh_no(-aspect, aspect, -1.0f, 1.0f, -100.0f, 100.0f, dest);
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return;
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}
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aspect = 1.0f / aspect;
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glm_ortho_rh_no(-1.0f, 1.0f, -aspect, aspect, -100.0f, 100.0f, dest);
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}
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/*!
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* @brief set up orthographic projection matrix with given CUBE size
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* with a right-hand coordinate system and a
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* clip-space of [-1, 1].
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*
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* @param[in] aspect aspect ratio ( width / height )
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* @param[in] size cube size
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* @param[out] dest result matrix
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*/
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CGLM_INLINE
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void
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glm_ortho_default_s_rh_no(float aspect, float size, mat4 dest) {
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if (aspect >= 1.0f) {
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glm_ortho_rh_no(-size * aspect,
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size * aspect,
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-size,
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size,
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-size - 100.0f,
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size + 100.0f,
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dest);
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return;
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}
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glm_ortho_rh_no(-size,
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size,
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-size / aspect,
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size / aspect,
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-size - 100.0f,
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size + 100.0f,
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dest);
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}
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#endif /*cglm_ortho_rh_no_h*/
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