shaders/common_scene.glsl

   1 // :D
   2
   3 in vec2 aUv;
   4 in vec4 aNorm;
   5 in vec3 aCo;
   6 in vec3 aWorldCo;
   7 flat in ivec4 light_indices;
   8
   9 uniform samplerBuffer uLightsArray;
  10
  11 #include "common_world.glsl"
  12 #include "light_clearskies.glsl"
  13
  14 float sdLine( vec3 p, vec3 a, vec3 b )
  15 {
  16   vec3 pa = p - a;
  17   vec3 ba = b - a;
  18
  19   float h = clamp( dot(pa,ba)/dot(ba,ba), 0.0, 1.0 );
  20   return length( pa - ba*h );
  21 }
  22
  23 float compute_board_shadow()
  24 {
  25    // player shadow
  26    float dist_to_player = max( 0.0, sdLine( aWorldCo, uBoard0, uBoard1 )-0.1 );
  27    float player_shadow = max( 1.0-dist_to_player*2.7, 0.0 );
  28    player_shadow *= player_shadow*player_shadow*player_shadow;
  29
  30    return 1.0 - player_shadow*0.8;
  31 }
  32
  33 vec3 scene_apply_fog( vec3 vfrag, vec3 colour, float fdist )
  34 {
  35    float dist = pow(fdist*0.0010,0.78);
  36    return mix( vfrag, colour, min( 1.0, dist ) );
  37 }
  38
  39 vec3 scene_do_lighting( vec3 diffuse, vec3 wnormal )
  40 {
  41    world_info world;
  42    scene_state( g_time, world );
  43
  44    // Lighting
  45    vec3 halfview = uCamera - aWorldCo;
  46    float fdist = length(halfview);
  47    halfview /= fdist;
  48
  49    vec3 total_light = vec3(0.0);
  50
  51
  52    float world_shadow = newlight_compute_sun_shadow( world.sun_dir
  53                                           * (1.0/(max(world.sun_dir.y,0.0)+0.2)) );
  54    float board_shadow = compute_board_shadow();
  55
  56    total_light += scene_lighting( wnormal, min( board_shadow, world_shadow ),
  57                                   halfview, world );
  58
  59    //total_light += scene_lighting_old( wnormal, world );
  60
  61    // Compute the other lights that exist in the map, not effected by the sun
  62    // shadow
  63
  64    // read lights
  65    vec4 light_colour_0 = texelFetch( uLightsArray, light_indices.x*3+0 );
  66    vec4 light_colour_1 = texelFetch( uLightsArray, light_indices.y*3+0 );
  67    vec4 light_colour_2 = texelFetch( uLightsArray, light_indices.z*3+0 );
  68    vec4 light_co_0     = texelFetch( uLightsArray, light_indices.x*3+1 );
  69    vec4 light_co_1     = texelFetch( uLightsArray, light_indices.y*3+1 );
  70    vec4 light_co_2     = texelFetch( uLightsArray, light_indices.z*3+1 );
  71    vec4 light_dir_0    = texelFetch( uLightsArray, light_indices.x*3+2 );
  72    vec4 light_dir_1    = texelFetch( uLightsArray, light_indices.y*3+2 );
  73    vec4 light_dir_2    = texelFetch( uLightsArray, light_indices.z*3+2 );
  74
  75    if( g_debug_indices == 1 )
  76    {
  77       float rings = min( fract(distance(light_co_0.xyz,aWorldCo)),
  78                       min( fract(distance(light_co_1.xyz,aWorldCo)),
  79                            fract(distance(light_co_2.xyz,aWorldCo)) )
  80                         );
  81
  82       return vec3(fract(light_indices.x * 0.125), fract(light_indices.y*0.125),
  83                   fract(light_indices.z * 0.125 )) + (rings-0.5) * 0.25;
  84    }
  85
  86    if( g_debug_complexity == 1 )
  87    {
  88       return vec3(1.0,0.0,0.0) * ( light_indices.w/3.0 );
  89    }
  90
  91    if( light_indices.w >= 1 )
  92    {
  93       total_light += newlight_compute_spot
  94                      (
  95                         wnormal, halfview,
  96                         light_colour_0.rgb,
  97                         light_co_0.xyz,
  98                         light_dir_0
  99                      ) * board_shadow
 100                        * step( world.day_phase, light_colour_0.w );
 101
 102       if( light_indices.w >= 2 )
 103       {
 104          total_light += newlight_compute_spot
 105                         (
 106                            wnormal, halfview,
 107                            light_colour_1.rgb,
 108                            light_co_1.xyz,
 109                            light_dir_1
 110                         ) * board_shadow
 111                           * step( world.day_phase, light_colour_1.w );
 112
 113          if( light_indices.w >= 3 )
 114          {
 115             total_light += newlight_compute_spot
 116                            (
 117                               wnormal, halfview,
 118                               light_colour_2.rgb,
 119                               light_co_2.xyz,
 120                               light_dir_2
 121                            ) * board_shadow
 122                              * step( world.day_phase, light_colour_2.w );
 123          }
 124       }
 125    }
 126
 127    vec3 fog_colour = scene_sky( -halfview, world );
 128
 129    return scene_apply_fog( diffuse * total_light, fog_colour, fdist );
 130 }