camera.h

   1 #ifndef CAMERA_H
   2 #define CAMERA_H
   3
   4 #include "common.h"
   5
   6 static v2f camera_angles;
   7 static v3f camera_pos;
   8
   9 static m4x3f camera_mtx,
  10              camera_mtx_inverse;
  11
  12 static void camera_update(void)
  13 {
  14    /* Update camera matrices */
  15    v4f qyaw, qpitch, qcam;
  16    q_axis_angle( qyaw, (v3f){ 0.0f, 1.0f, 0.0f }, -camera_angles[0] );
  17    q_axis_angle( qpitch, (v3f){ 1.0f, 0.0f, 0.0f }, -camera_angles[1] );
  18
  19    q_mul( qyaw, qpitch, qcam );
  20    q_m3x3( qcam, camera_mtx );
  21    v3_copy( camera_pos, camera_mtx[3] );
  22
  23    m4x3_invert_affine( camera_mtx, camera_mtx_inverse );
  24 }
  25
  26 #endif /* CAMERA_H */