shaders/common_scene.glsl

   1 // :D
   2
   3 in vec2 aUv;
   4 in vec4 aNorm;
   5 in vec3 aCo;
   6 in vec3 aWorldCo;
   7
   8 #include "common_world.glsl"
   9
  10 float sdLine( vec3 p, vec3 a, vec3 b )
  11 {
  12   vec3 pa = p - a;
  13   vec3 ba = b - a;
  14
  15   float h = clamp( dot(pa,ba)/dot(ba,ba), 0.0, 1.0 );
  16   return length( pa - ba*h );
  17 }
  18
  19 float compute_board_shadow()
  20 {
  21    // player shadow
  22    float dist_to_player = max( 0.0, sdLine( aWorldCo, g_board_0.xyz,
  23                                                       g_board_1.xyz )-0.1 );
  24    float player_shadow = max( 1.0-dist_to_player*2.7, 0.0 );
  25    player_shadow *= player_shadow*player_shadow*player_shadow;
  26
  27    return 1.0 - player_shadow*0.8;
  28 }
  29
  30 vec3 scene_compute_lighting( vec3 diffuse, vec3 normal, vec3 co )
  31 {
  32    return world_compute_lighting( diffuse, normal, co, compute_board_shadow() );
  33 }