render.h

   1 #ifndef RENDER_H
   2 #define RENDER_H
   3 #define VG_3D
   4 #include "vg/vg.h"
   5
   6 static struct pipeline
   7 {
   8    float fov;
   9 }
  10 gpipeline;
  11
  12 static void render_water_texture( m4x3f camera );
  13 static void render_water_surface( m4x4f pv );
  14 static void render_world( m4x4f pv );
  15
  16 /*
  17  * http://www.terathon.com/lengyel/Lengyel-Oblique.pdf
  18  */
  19 static void plane_clip_projection( m4x4f mat, v4f plane )
  20 {
  21    v4f c =
  22    {
  23       (vg_signf(plane[0]) + mat[2][0]) / mat[0][0],
  24       (vg_signf(plane[1]) + mat[2][1]) / mat[1][1],
  25       -1.0f,
  26       (1.0f + mat[2][2]) / mat[3][2]
  27    };
  28
  29    v4_muls( plane, 2.0f / v4_dot(plane,c), c );
  30
  31    mat[0][2] = c[0];
  32    mat[1][2] = c[1];
  33    mat[2][2] = c[2] + 1.0f;
  34    mat[3][2] = c[3];
  35 }
  36
  37 #endif /* RENDER_H */