wip

1 files changed, 582 insertions, 0 deletions

diff --git a/include/cglm/cam.h b/include/cglm/cam.h
new file mode 100644
index 0000000..816cb5e
--- /dev/null
+++ b/include/cglm/cam.h
@@ -0,0 +1,582 @@
+/*
+ * Copyright (c), Recep Aslantas.
+ *
+ * MIT License (MIT), http://opensource.org/licenses/MIT
+ * Full license can be found in the LICENSE file
+ */
+
+/*
+ Functions:
+   CGLM_INLINE void  glm_frustum(float left,   float right,
+                                 float bottom, float top,
+                                 float nearZ,  float farZ,
+                                 mat4  dest)
+   CGLM_INLINE void  glm_ortho(float left,   float right,
+                               float bottom, float top,
+                               float nearZ,  float farZ,
+                               mat4  dest)
+   CGLM_INLINE void  glm_ortho_aabb(vec3 box[2], mat4 dest)
+   CGLM_INLINE void  glm_ortho_aabb_p(vec3 box[2],  float padding, mat4 dest)
+   CGLM_INLINE void  glm_ortho_aabb_pz(vec3 box[2], float padding, mat4 dest)
+   CGLM_INLINE void  glm_ortho_default(float aspect, mat4  dest)
+   CGLM_INLINE void  glm_ortho_default_s(float aspect, float size, mat4 dest)
+   CGLM_INLINE void  glm_perspective(float fovy,
+                                     float aspect,
+                                     float nearZ,
+                                     float farZ,
+                                     mat4  dest)
+   CGLM_INLINE void  glm_perspective_default(float aspect, mat4 dest)
+   CGLM_INLINE void  glm_perspective_resize(float aspect, mat4 proj)
+   CGLM_INLINE void  glm_lookat(vec3 eye, vec3 center, vec3 up, mat4 dest)
+   CGLM_INLINE void  glm_look(vec3 eye, vec3 dir, vec3 up, mat4 dest)
+   CGLM_INLINE void  glm_look_anyup(vec3 eye, vec3 dir, mat4 dest)
+   CGLM_INLINE void  glm_persp_decomp(mat4   proj,
+                                      float *nearZ, float *farZ,
+                                      float *top,   float *bottom,
+                                      float *left,  float *right)
+   CGLM_INLINE void  glm_persp_decompv(mat4 proj, float dest[6])
+   CGLM_INLINE void  glm_persp_decomp_x(mat4 proj, float *left, float *right)
+   CGLM_INLINE void  glm_persp_decomp_y(mat4 proj, float *top,  float *bottom)
+   CGLM_INLINE void  glm_persp_decomp_z(mat4 proj, float *nearv, float *farv)
+   CGLM_INLINE void  glm_persp_decomp_far(mat4 proj, float *farZ)
+   CGLM_INLINE void  glm_persp_decomp_near(mat4 proj, float *nearZ)
+   CGLM_INLINE float glm_persp_fovy(mat4 proj)
+   CGLM_INLINE float glm_persp_aspect(mat4 proj)
+   CGLM_INLINE void  glm_persp_sizes(mat4 proj, float fovy, vec4 dest)
+ */
+
+#ifndef cglm_cam_h
+#define cglm_cam_h
+
+#include "common.h"
+#include "plane.h"
+
+#include "clipspace/persp.h"
+
+#ifndef CGLM_CLIPSPACE_INCLUDE_ALL
+#  if CGLM_CONFIG_CLIP_CONTROL == CGLM_CLIP_CONTROL_LH_ZO
+#    include "clipspace/ortho_lh_zo.h"
+#    include "clipspace/persp_lh_zo.h"
+#    include "clipspace/view_lh_zo.h"
+#  elif CGLM_CONFIG_CLIP_CONTROL == CGLM_CLIP_CONTROL_LH_NO
+#    include "clipspace/ortho_lh_no.h"
+#    include "clipspace/persp_lh_no.h"
+#    include "clipspace/view_lh_no.h"
+#  elif CGLM_CONFIG_CLIP_CONTROL == CGLM_CLIP_CONTROL_RH_ZO
+#    include "clipspace/ortho_rh_zo.h"
+#    include "clipspace/persp_rh_zo.h"
+#    include "clipspace/view_rh_zo.h"
+#  elif CGLM_CONFIG_CLIP_CONTROL == CGLM_CLIP_CONTROL_RH_NO
+#    include "clipspace/ortho_rh_no.h"
+#    include "clipspace/persp_rh_no.h"
+#    include "clipspace/view_rh_no.h"
+#  endif
+#else
+#  include "clipspace/ortho_lh_zo.h"
+#  include "clipspace/persp_lh_zo.h"
+#  include "clipspace/ortho_lh_no.h"
+#  include "clipspace/persp_lh_no.h"
+#  include "clipspace/ortho_rh_zo.h"
+#  include "clipspace/persp_rh_zo.h"
+#  include "clipspace/ortho_rh_no.h"
+#  include "clipspace/persp_rh_no.h"
+#  include "clipspace/view_lh_zo.h"
+#  include "clipspace/view_lh_no.h"
+#  include "clipspace/view_rh_zo.h"
+#  include "clipspace/view_rh_no.h"
+#endif
+
+/*!
+ * @brief set up perspective peprojection matrix
+ *
+ * @param[in]  left    viewport.left
+ * @param[in]  right   viewport.right
+ * @param[in]  bottom  viewport.bottom
+ * @param[in]  top     viewport.top
+ * @param[in]  nearZ   near clipping plane
+ * @param[in]  farZ    far clipping plane
+ * @param[out] dest    result matrix
+ */
+CGLM_INLINE
+void
+glm_frustum(float left,    float right,
+            float bottom,  float top,
+            float nearZ,   float farZ,
+            mat4  dest) {
+#if CGLM_CONFIG_CLIP_CONTROL == CGLM_CLIP_CONTROL_LH_ZO
+  glm_frustum_lh_zo(left, right, bottom, top, nearZ, farZ, dest);
+#elif CGLM_CONFIG_CLIP_CONTROL == CGLM_CLIP_CONTROL_LH_NO
+  glm_frustum_lh_no(left, right, bottom, top, nearZ, farZ, dest);
+#elif CGLM_CONFIG_CLIP_CONTROL == CGLM_CLIP_CONTROL_RH_ZO
+  glm_frustum_rh_zo(left, right, bottom, top, nearZ, farZ, dest);
+#elif CGLM_CONFIG_CLIP_CONTROL == CGLM_CLIP_CONTROL_RH_NO
+  glm_frustum_rh_no(left, right, bottom, top, nearZ, farZ, dest);
+#endif
+}
+
+/*!
+ * @brief set up orthographic projection matrix
+ *
+ * @param[in]  left    viewport.left
+ * @param[in]  right   viewport.right
+ * @param[in]  bottom  viewport.bottom
+ * @param[in]  top     viewport.top
+ * @param[in]  nearZ   near clipping plane
+ * @param[in]  farZ    far clipping plane
+ * @param[out] dest    result matrix
+ */
+CGLM_INLINE
+void
+glm_ortho(float left,    float right,
+          float bottom,  float top,
+          float nearZ,   float farZ,
+          mat4  dest) {
+#if CGLM_CONFIG_CLIP_CONTROL == CGLM_CLIP_CONTROL_LH_ZO
+  glm_ortho_lh_zo(left, right, bottom, top, nearZ, farZ, dest);
+#elif CGLM_CONFIG_CLIP_CONTROL == CGLM_CLIP_CONTROL_LH_NO
+  glm_ortho_lh_no(left, right, bottom, top, nearZ, farZ, dest);
+#elif CGLM_CONFIG_CLIP_CONTROL == CGLM_CLIP_CONTROL_RH_ZO
+  glm_ortho_rh_zo(left, right, bottom, top, nearZ, farZ, dest);
+#elif CGLM_CONFIG_CLIP_CONTROL == CGLM_CLIP_CONTROL_RH_NO
+  glm_ortho_rh_no(left, right, bottom, top, nearZ, farZ, dest);
+#endif
+}
+
+/*!
+ * @brief set up orthographic projection matrix using bounding box
+ *
+ * bounding box (AABB) must be in view space
+ *
+ * @param[in]  box   AABB
+ * @param[out] dest  result matrix
+ */
+CGLM_INLINE
+void
+glm_ortho_aabb(vec3 box[2], mat4 dest) {
+#if CGLM_CONFIG_CLIP_CONTROL == CGLM_CLIP_CONTROL_LH_ZO
+  glm_ortho_aabb_lh_zo(box, dest);
+#elif CGLM_CONFIG_CLIP_CONTROL == CGLM_CLIP_CONTROL_LH_NO
+  glm_ortho_aabb_lh_no(box, dest);
+#elif CGLM_CONFIG_CLIP_CONTROL == CGLM_CLIP_CONTROL_RH_ZO
+  glm_ortho_aabb_rh_zo(box, dest);
+#elif CGLM_CONFIG_CLIP_CONTROL == CGLM_CLIP_CONTROL_RH_NO
+  glm_ortho_aabb_rh_no(box, dest);
+#endif
+}
+
+/*!
+ * @brief set up orthographic projection matrix using bounding box
+ *
+ * bounding box (AABB) must be in view space
+ *
+ * @param[in]  box     AABB
+ * @param[in]  padding padding
+ * @param[out] dest    result matrix
+ */
+CGLM_INLINE
+void
+glm_ortho_aabb_p(vec3 box[2], float padding, mat4 dest) {
+#if CGLM_CONFIG_CLIP_CONTROL == CGLM_CLIP_CONTROL_LH_ZO
+  glm_ortho_aabb_p_lh_zo(box, padding, dest);
+#elif CGLM_CONFIG_CLIP_CONTROL == CGLM_CLIP_CONTROL_LH_NO
+  glm_ortho_aabb_p_lh_no(box, padding, dest);
+#elif CGLM_CONFIG_CLIP_CONTROL == CGLM_CLIP_CONTROL_RH_ZO
+  glm_ortho_aabb_p_rh_zo(box, padding, dest);
+#elif CGLM_CONFIG_CLIP_CONTROL == CGLM_CLIP_CONTROL_RH_NO
+  glm_ortho_aabb_p_rh_no(box, padding, dest);
+#endif
+}
+
+/*!
+ * @brief set up orthographic projection matrix using bounding box
+ *
+ * bounding box (AABB) must be in view space
+ *
+ * @param[in]  box     AABB
+ * @param[in]  padding padding for near and far
+ * @param[out] dest    result matrix
+ */
+CGLM_INLINE
+void
+glm_ortho_aabb_pz(vec3 box[2], float padding, mat4 dest) {
+#if CGLM_CONFIG_CLIP_CONTROL == CGLM_CLIP_CONTROL_LH_ZO
+  glm_ortho_aabb_pz_lh_zo(box, padding, dest);
+#elif CGLM_CONFIG_CLIP_CONTROL == CGLM_CLIP_CONTROL_LH_NO
+  glm_ortho_aabb_pz_lh_no(box, padding, dest);
+#elif CGLM_CONFIG_CLIP_CONTROL == CGLM_CLIP_CONTROL_RH_ZO
+  glm_ortho_aabb_pz_rh_zo(box, padding, dest);
+#elif CGLM_CONFIG_CLIP_CONTROL == CGLM_CLIP_CONTROL_RH_NO
+  glm_ortho_aabb_pz_rh_no(box, padding, dest);
+#endif
+}
+
+/*!
+ * @brief set up unit orthographic projection matrix
+ *
+ * @param[in]  aspect aspect ration ( width / height )
+ * @param[out] dest   result matrix
+ */
+CGLM_INLINE
+void
+glm_ortho_default(float aspect, mat4 dest) {
+#if CGLM_CONFIG_CLIP_CONTROL == CGLM_CLIP_CONTROL_LH_ZO
+  glm_ortho_default_lh_zo(aspect, dest);
+#elif CGLM_CONFIG_CLIP_CONTROL == CGLM_CLIP_CONTROL_LH_NO
+  glm_ortho_default_lh_no(aspect, dest);
+#elif CGLM_CONFIG_CLIP_CONTROL == CGLM_CLIP_CONTROL_RH_ZO
+  glm_ortho_default_rh_zo(aspect, dest);
+#elif CGLM_CONFIG_CLIP_CONTROL == CGLM_CLIP_CONTROL_RH_NO
+  glm_ortho_default_rh_no(aspect, dest);
+#endif
+}
+
+/*!
+ * @brief set up orthographic projection matrix with given CUBE size
+ *
+ * @param[in]  aspect aspect ratio ( width / height )
+ * @param[in]  size   cube size
+ * @param[out] dest   result matrix
+ */
+CGLM_INLINE
+void
+glm_ortho_default_s(float aspect, float size, mat4 dest) {
+#if CGLM_CONFIG_CLIP_CONTROL == CGLM_CLIP_CONTROL_LH_ZO
+  glm_ortho_default_s_lh_zo(aspect, size, dest);
+#elif CGLM_CONFIG_CLIP_CONTROL == CGLM_CLIP_CONTROL_LH_NO
+  glm_ortho_default_s_lh_no(aspect, size, dest);
+#elif CGLM_CONFIG_CLIP_CONTROL == CGLM_CLIP_CONTROL_RH_ZO
+  glm_ortho_default_s_rh_zo(aspect, size, dest);
+#elif CGLM_CONFIG_CLIP_CONTROL == CGLM_CLIP_CONTROL_RH_NO
+  glm_ortho_default_s_rh_no(aspect, size, dest);
+#endif
+}
+
+/*!
+ * @brief set up perspective projection matrix
+ *
+ * @param[in]  fovy    field of view angle
+ * @param[in]  aspect  aspect ratio ( width / height )
+ * @param[in]  nearZ   near clipping plane
+ * @param[in]  farZ    far clipping planes
+ * @param[out] dest    result matrix
+ */
+CGLM_INLINE
+void
+glm_perspective(float fovy, float aspect, float nearZ, float farZ, mat4 dest) {
+#if CGLM_CONFIG_CLIP_CONTROL == CGLM_CLIP_CONTROL_LH_ZO
+  glm_perspective_lh_zo(fovy, aspect, nearZ, farZ, dest);
+#elif CGLM_CONFIG_CLIP_CONTROL == CGLM_CLIP_CONTROL_LH_NO
+  glm_perspective_lh_no(fovy, aspect, nearZ, farZ, dest);
+#elif CGLM_CONFIG_CLIP_CONTROL == CGLM_CLIP_CONTROL_RH_ZO
+  glm_perspective_rh_zo(fovy, aspect, nearZ, farZ, dest);
+#elif CGLM_CONFIG_CLIP_CONTROL == CGLM_CLIP_CONTROL_RH_NO
+  glm_perspective_rh_no(fovy, aspect, nearZ, farZ, dest);
+#endif
+}
+
+/*!
+ * @brief extend perspective projection matrix's far distance
+ *
+ * this function does not guarantee far >= near, be aware of that!
+ *
+ * @param[in, out] proj      projection matrix to extend
+ * @param[in]      deltaFar  distance from existing far (negative to shink)
+ */
+CGLM_INLINE
+void
+glm_persp_move_far(mat4 proj, float deltaFar) {
+#if CGLM_CONFIG_CLIP_CONTROL == CGLM_CLIP_CONTROL_LH_ZO
+  glm_persp_move_far_lh_zo(proj, deltaFar);
+#elif CGLM_CONFIG_CLIP_CONTROL == CGLM_CLIP_CONTROL_LH_NO
+  glm_persp_move_far_lh_no(proj, deltaFar);
+#elif CGLM_CONFIG_CLIP_CONTROL == CGLM_CLIP_CONTROL_RH_ZO
+  glm_persp_move_far_rh_zo(proj, deltaFar);
+#elif CGLM_CONFIG_CLIP_CONTROL == CGLM_CLIP_CONTROL_RH_NO
+  glm_persp_move_far_rh_no(proj, deltaFar);
+#endif
+}
+
+/*!
+ * @brief set up perspective projection matrix with default near/far
+ *        and angle values
+ *
+ * @param[in]  aspect aspect ratio ( width / height )
+ * @param[out] dest   result matrix
+ */
+CGLM_INLINE
+void
+glm_perspective_default(float aspect, mat4 dest) {
+#if CGLM_CONFIG_CLIP_CONTROL == CGLM_CLIP_CONTROL_LH_ZO
+  glm_perspective_default_lh_zo(aspect, dest);
+#elif CGLM_CONFIG_CLIP_CONTROL == CGLM_CLIP_CONTROL_LH_NO
+  glm_perspective_default_lh_no(aspect, dest);
+#elif CGLM_CONFIG_CLIP_CONTROL == CGLM_CLIP_CONTROL_RH_ZO
+  glm_perspective_default_rh_zo(aspect, dest);
+#elif CGLM_CONFIG_CLIP_CONTROL == CGLM_CLIP_CONTROL_RH_NO
+  glm_perspective_default_rh_no(aspect, dest);
+#endif
+}
+
+/*!
+ * @brief resize perspective matrix by aspect ratio ( width / height )
+ *        this makes very easy to resize proj matrix when window /viewport
+ *        reized
+ *
+ * @param[in]      aspect aspect ratio ( width / height )
+ * @param[in, out] proj   perspective projection matrix
+ */
+CGLM_INLINE
+void
+glm_perspective_resize(float aspect, mat4 proj) {
+  if (proj[0][0] == 0.0f)
+    return;
+
+  proj[0][0] = proj[1][1] / aspect;
+}
+
+/*!
+ * @brief set up view matrix
+ *
+ * NOTE: The UP vector must not be parallel to the line of sight from
+ *       the eye point to the reference point
+ *
+ * @param[in]  eye    eye vector
+ * @param[in]  center center vector
+ * @param[in]  up     up vector
+ * @param[out] dest   result matrix
+ */
+CGLM_INLINE
+void
+glm_lookat(vec3 eye, vec3 center, vec3 up, mat4 dest) {
+#if CGLM_CONFIG_CLIP_CONTROL & CGLM_CLIP_CONTROL_LH_BIT
+  glm_lookat_lh(eye, center, up, dest);
+#elif CGLM_CONFIG_CLIP_CONTROL & CGLM_CLIP_CONTROL_RH_BIT
+  glm_lookat_rh(eye, center, up, dest);
+#endif
+}
+
+/*!
+ * @brief set up view matrix
+ *
+ * convenient wrapper for lookat: if you only have direction not target self
+ * then this might be useful. Because you need to get target from direction.
+ *
+ * NOTE: The UP vector must not be parallel to the line of sight from
+ *       the eye point to the reference point
+ *
+ * @param[in]  eye    eye vector
+ * @param[in]  dir    direction vector
+ * @param[in]  up     up vector
+ * @param[out] dest   result matrix
+ */
+CGLM_INLINE
+void
+glm_look(vec3 eye, vec3 dir, vec3 up, mat4 dest) {
+#if CGLM_CONFIG_CLIP_CONTROL & CGLM_CLIP_CONTROL_LH_BIT
+  glm_look_lh(eye, dir, up, dest);
+#elif CGLM_CONFIG_CLIP_CONTROL & CGLM_CLIP_CONTROL_RH_BIT
+  glm_look_rh(eye, dir, up, dest);
+#endif
+}
+
+/*!
+ * @brief set up view matrix
+ *
+ * convenient wrapper for look: if you only have direction and if you don't
+ * care what UP vector is then this might be useful to create view matrix
+ *
+ * @param[in]  eye    eye vector
+ * @param[in]  dir    direction vector
+ * @param[out] dest   result matrix
+ */
+CGLM_INLINE
+void
+glm_look_anyup(vec3 eye, vec3 dir, mat4 dest) {
+#if CGLM_CONFIG_CLIP_CONTROL & CGLM_CLIP_CONTROL_LH_BIT
+  glm_look_anyup_lh(eye, dir, dest);
+#elif CGLM_CONFIG_CLIP_CONTROL & CGLM_CLIP_CONTROL_RH_BIT
+  glm_look_anyup_rh(eye, dir, dest);
+#endif
+}
+
+/*!
+ * @brief decomposes frustum values of perspective projection.
+ *
+ * @param[in]  proj    perspective projection matrix
+ * @param[out] nearZ   near
+ * @param[out] farZ    far
+ * @param[out] top     top
+ * @param[out] bottom  bottom
+ * @param[out] left    left
+ * @param[out] right   right
+ */
+CGLM_INLINE
+void
+glm_persp_decomp(mat4 proj,
+                 float * __restrict nearZ, float * __restrict farZ,
+                 float * __restrict top,   float * __restrict bottom,
+                 float * __restrict left,  float * __restrict right) {
+#if CGLM_CONFIG_CLIP_CONTROL == CGLM_CLIP_CONTROL_LH_ZO
+  glm_persp_decomp_lh_zo(proj, nearZ, farZ, top, bottom, left, right);
+#elif CGLM_CONFIG_CLIP_CONTROL == CGLM_CLIP_CONTROL_LH_NO
+  glm_persp_decomp_lh_no(proj, nearZ, farZ, top, bottom, left, right);
+#elif CGLM_CONFIG_CLIP_CONTROL == CGLM_CLIP_CONTROL_RH_ZO
+  glm_persp_decomp_rh_zo(proj, nearZ, farZ, top, bottom, left, right);
+#elif CGLM_CONFIG_CLIP_CONTROL == CGLM_CLIP_CONTROL_RH_NO
+  glm_persp_decomp_rh_no(proj, nearZ, farZ, top, bottom, left, right);
+#endif
+}
+
+/*!
+ * @brief decomposes frustum values of perspective projection.
+ *        this makes easy to get all values at once
+ *
+ * @param[in]  proj   perspective projection matrix
+ * @param[out] dest   array
+ */
+CGLM_INLINE
+void
+glm_persp_decompv(mat4 proj, float dest[6]) {
+#if CGLM_CONFIG_CLIP_CONTROL == CGLM_CLIP_CONTROL_LH_ZO
+  glm_persp_decompv_lh_zo(proj, dest);
+#elif CGLM_CONFIG_CLIP_CONTROL == CGLM_CLIP_CONTROL_LH_NO
+  glm_persp_decompv_lh_no(proj, dest);
+#elif CGLM_CONFIG_CLIP_CONTROL == CGLM_CLIP_CONTROL_RH_ZO
+  glm_persp_decompv_rh_zo(proj, dest);
+#elif CGLM_CONFIG_CLIP_CONTROL == CGLM_CLIP_CONTROL_RH_NO
+  glm_persp_decompv_rh_no(proj, dest);
+#endif
+}
+
+/*!
+ * @brief decomposes left and right values of perspective projection.
+ *        x stands for x axis (left / right axis)
+ *
+ * @param[in]  proj  perspective projection matrix
+ * @param[out] left  left
+ * @param[out] right right
+ */
+CGLM_INLINE
+void
+glm_persp_decomp_x(mat4 proj,
+                   float * __restrict left,
+                   float * __restrict right) {
+#if CGLM_CONFIG_CLIP_CONTROL == CGLM_CLIP_CONTROL_LH_ZO
+  glm_persp_decomp_x_lh_zo(proj, left, right);
+#elif CGLM_CONFIG_CLIP_CONTROL == CGLM_CLIP_CONTROL_LH_NO
+  glm_persp_decomp_x_lh_no(proj, left, right);
+#elif CGLM_CONFIG_CLIP_CONTROL == CGLM_CLIP_CONTROL_RH_ZO
+  glm_persp_decomp_x_rh_zo(proj, left, right);
+#elif CGLM_CONFIG_CLIP_CONTROL == CGLM_CLIP_CONTROL_RH_NO
+  glm_persp_decomp_x_rh_no(proj, left, right);
+#endif
+}
+
+/*!
+ * @brief decomposes top and bottom values of perspective projection.
+ *        y stands for y axis (top / bottom axis)
+ *
+ * @param[in]  proj   perspective projection matrix
+ * @param[out] top    top
+ * @param[out] bottom bottom
+ */
+CGLM_INLINE
+void
+glm_persp_decomp_y(mat4 proj,
+                   float * __restrict top,
+                   float * __restrict bottom) {
+#if CGLM_CONFIG_CLIP_CONTROL == CGLM_CLIP_CONTROL_LH_ZO
+  glm_persp_decomp_y_lh_zo(proj, top, bottom);
+#elif CGLM_CONFIG_CLIP_CONTROL == CGLM_CLIP_CONTROL_LH_NO
+  glm_persp_decomp_y_lh_no(proj, top, bottom);
+#elif CGLM_CONFIG_CLIP_CONTROL == CGLM_CLIP_CONTROL_RH_ZO
+  glm_persp_decomp_y_rh_zo(proj, top, bottom);
+#elif CGLM_CONFIG_CLIP_CONTROL == CGLM_CLIP_CONTROL_RH_NO
+  glm_persp_decomp_y_rh_no(proj, top, bottom);
+#endif
+}
+
+/*!
+ * @brief decomposes near and far values of perspective projection.
+ *        z stands for z axis (near / far axis)
+ *
+ * @param[in]  proj    perspective projection matrix
+ * @param[out] nearZ   near
+ * @param[out] farZ    far
+ */
+CGLM_INLINE
+void
+glm_persp_decomp_z(mat4 proj, float * __restrict nearZ, float * __restrict farZ) {
+#if CGLM_CONFIG_CLIP_CONTROL == CGLM_CLIP_CONTROL_LH_ZO
+  glm_persp_decomp_z_lh_zo(proj, nearZ, farZ);
+#elif CGLM_CONFIG_CLIP_CONTROL == CGLM_CLIP_CONTROL_LH_NO
+  glm_persp_decomp_z_lh_no(proj, nearZ, farZ);
+#elif CGLM_CONFIG_CLIP_CONTROL == CGLM_CLIP_CONTROL_RH_ZO
+  glm_persp_decomp_z_rh_zo(proj, nearZ, farZ);
+#elif CGLM_CONFIG_CLIP_CONTROL == CGLM_CLIP_CONTROL_RH_NO
+  glm_persp_decomp_z_rh_no(proj, nearZ, farZ);
+#endif
+}
+
+/*!
+ * @brief decomposes far value of perspective projection.
+ *
+ * @param[in]  proj   perspective projection matrix
+ * @param[out] farZ   far
+ */
+CGLM_INLINE
+void
+glm_persp_decomp_far(mat4 proj, float * __restrict farZ) {
+#if CGLM_CONFIG_CLIP_CONTROL == CGLM_CLIP_CONTROL_LH_ZO
+  glm_persp_decomp_far_lh_zo(proj, farZ);
+#elif CGLM_CONFIG_CLIP_CONTROL == CGLM_CLIP_CONTROL_LH_NO
+  glm_persp_decomp_far_lh_no(proj, farZ);
+#elif CGLM_CONFIG_CLIP_CONTROL == CGLM_CLIP_CONTROL_RH_ZO
+  glm_persp_decomp_far_rh_zo(proj, farZ);
+#elif CGLM_CONFIG_CLIP_CONTROL == CGLM_CLIP_CONTROL_RH_NO
+  glm_persp_decomp_far_rh_no(proj, farZ);
+#endif
+}
+
+/*!
+ * @brief decomposes near value of perspective projection.
+ *
+ * @param[in]  proj   perspective projection matrix
+ * @param[out] nearZ  near
+ */
+CGLM_INLINE
+void
+glm_persp_decomp_near(mat4 proj, float * __restrict nearZ) {
+#if CGLM_CONFIG_CLIP_CONTROL == CGLM_CLIP_CONTROL_LH_ZO
+  glm_persp_decomp_near_lh_zo(proj, nearZ);
+#elif CGLM_CONFIG_CLIP_CONTROL == CGLM_CLIP_CONTROL_LH_NO
+  glm_persp_decomp_near_lh_no(proj, nearZ);
+#elif CGLM_CONFIG_CLIP_CONTROL == CGLM_CLIP_CONTROL_RH_ZO
+  glm_persp_decomp_near_rh_zo(proj, nearZ);
+#elif CGLM_CONFIG_CLIP_CONTROL == CGLM_CLIP_CONTROL_RH_NO
+  glm_persp_decomp_near_rh_no(proj, nearZ);
+#endif
+}
+
+/*!
+ * @brief returns sizes of near and far planes of perspective projection
+ *
+ * @param[in]  proj perspective projection matrix
+ * @param[in]  fovy fovy (see brief)
+ * @param[out] dest sizes order: [Wnear, Hnear, Wfar, Hfar]
+ */
+CGLM_INLINE
+void
+glm_persp_sizes(mat4 proj, float fovy, vec4 dest) {
+#if CGLM_CONFIG_CLIP_CONTROL == CGLM_CLIP_CONTROL_LH_ZO
+  glm_persp_sizes_lh_zo(proj, fovy, dest);
+#elif CGLM_CONFIG_CLIP_CONTROL == CGLM_CLIP_CONTROL_LH_NO
+  glm_persp_sizes_lh_no(proj, fovy, dest);
+#elif CGLM_CONFIG_CLIP_CONTROL == CGLM_CLIP_CONTROL_RH_ZO
+  glm_persp_sizes_rh_zo(proj, fovy, dest);
+#elif CGLM_CONFIG_CLIP_CONTROL == CGLM_CLIP_CONTROL_RH_NO
+  glm_persp_sizes_rh_no(proj, fovy, dest);
+#endif
+}
+
+#endif /* cglm_cam_h */