vg_camera.h

   1 #pragma once
   2
   3 #include "vg_m.h"
   4
   5 typedef struct vg_camera vg_camera;
   6 struct vg_camera
   7 {
   8    /* Input */
   9    v3f angles;
  10    v3f pos;
  11    f32 fov, nearz, farz;
  12
  13    /* Output */
  14    m4x3f transform,
  15          transform_inverse;
  16
  17    struct vg_camera_mtx{
  18       m4x4f p,
  19             v,
  20             pv;
  21    }
  22    mtx,
  23    mtx_prev;
  24 };
  25
  26 void vg_camera_lerp_angles( v3f a, v3f b, f32 t, v3f d );
  27
  28 /* lerp position, fov, and angles */
  29 void vg_camera_lerp( vg_camera *a, vg_camera *b, f32 t, vg_camera *d );
  30 void vg_camera_copy( vg_camera *a, vg_camera *d );
  31 void vg_m4x3_transform_camera( m4x3f m, vg_camera *cam );
  32
  33 /*
  34  * 1) [angles, pos] -> transform
  35  */
  36 void vg_camera_update_transform( vg_camera *cam );
  37
  38 /*
  39  * 2) [transform] -> transform_inverse, view matrix
  40  */
  41 void vg_camera_update_view( vg_camera *cam );
  42
  43 /*
  44  * 3) [fov,nearz,farz] -> projection matrix
  45  */
  46 void vg_camera_update_projection( vg_camera *cam );
  47
  48 /*
  49  * 4) [projection matrix, view matrix] -> previous pv, new pv
  50  */
  51 void vg_camera_finalize( vg_camera *cam );