shaders/scene_water_fast.h

   1 #ifndef SHADER_scene_water_fast_H
   2 #define SHADER_scene_water_fast_H
   3 static void shader_scene_water_fast_link(void);
   4 static void shader_scene_water_fast_register(void);
   5 static struct vg_shader _shader_scene_water_fast = {
   6    .name = "scene_water_fast",
   7    .link = shader_scene_water_fast_link,
   8    .vs =
   9 {
  10 .orig_file = "shaders/scene.vs",
  11 .static_src =
  12 "layout (location=0) in vec3  a_co;\n"
  13 "layout (location=1) in vec4  a_norm;\n"
  14 "layout (location=2) in vec2  a_uv;\n"
  15 "layout (location=3) in ivec4 a_lights;\n"
  16 "\n"
  17 "#line       1        1 \n"
  18 "const float k_motion_lerp_amount = 0.01;\n"
  19 "\n"
  20 "#line      2        0 \n"
  21 "\n"
  22 "out vec3 aMotionVec0;\n"
  23 "out vec3 aMotionVec1;\n"
  24 "\n"
  25 "void vs_motion_out( vec4 vproj0, vec4 vproj1 )\n"
  26 "{\n"
  27 "   // This magically solves some artifacting errors!\n"
  28 "   //\n"
  29 "   vproj1 = vproj0*(1.0-k_motion_lerp_amount) + vproj1*k_motion_lerp_amount;\n"
  30 "\n"
  31 "   aMotionVec0 = vec3( vproj0.xy, vproj0.w );\n"
  32 "   aMotionVec1 = vec3( vproj1.xy, vproj1.w );\n"
  33 "}\n"
  34 "\n"
  35 "#line      7        0 \n"
  36 "\n"
  37 "uniform mat4x3 uMdl;\n"
  38 "uniform mat4   uPv;\n"
  39 "uniform mat4   uPvmPrev;\n"
  40 "\n"
  41 "out vec2 aUv;\n"
  42 "out vec4 aNorm;\n"
  43 "out vec3 aCo;\n"
  44 "out vec3 aWorldCo;\n"
  45 "\n"
  46 "flat out ivec4 light_indices;\n"
  47 "\n"
  48 "void main()\n"
  49 "{\n"
  50 "   vec3 world_pos0 = uMdl     * vec4( a_co, 1.0 );\n"
  51 "   vec4 vproj0     = uPv      * vec4( world_pos0, 1.0 );\n"
  52 "   vec4 vproj1     = uPvmPrev * vec4( a_co, 1.0 );\n"
  53 "\n"
  54 "   vs_motion_out( vproj0, vproj1 );\n"
  55 "\n"
  56 "   gl_Position = vproj0;\n"
  57 "\n"
  58 "   aUv = a_uv;\n"
  59 "   aNorm = vec4( mat3(uMdl) * a_norm.xyz, a_norm.w );\n"
  60 "   aCo = a_co;\n"
  61 "   aWorldCo = world_pos0;\n"
  62 "\n"
  63 "   light_indices = a_lights;\n"
  64 "}\n"
  65 ""},
  66    .fs =
  67 {
  68 .orig_file = "shaders/scene_water_fast.fs",
  69 .static_src =
  70 "uniform sampler2D uTexDudv;\n"
  71 "\n"
  72 "uniform float uTime;\n"
  73 "uniform vec3 uCamera;\n"
  74 "uniform float uSurfaceY;\n"
  75 "uniform vec3 uBoard0;\n"
  76 "uniform vec3 uBoard1;\n"
  77 "\n"
  78 "uniform vec3 uShoreColour;\n"
  79 "uniform vec3 uOceanColour;\n"
  80 "\n"
  81 "#line       1        1 \n"
  82 "// :D\n"
  83 "\n"
  84 "in vec2 aUv;\n"
  85 "in vec4 aNorm;\n"
  86 "in vec3 aCo;\n"
  87 "in vec3 aWorldCo;\n"
  88 "flat in ivec4 light_indices;\n"
  89 "\n"
  90 "uniform samplerBuffer uLightsArray;\n"
  91 "\n"
  92 "#line       1        1 \n"
  93 "layout (location = 0) out vec4 oColour;\n"
  94 "\n"
  95 "layout (std140) uniform ub_world_lighting\n"
  96 "{\n"
  97 "   vec4 g_light_colours[3];\n"
  98 "   vec4 g_light_directions[3];\n"
  99 "   vec4 g_ambient_colour;\n"
 100 "\n"
 101 "   vec4 g_water_plane;\n"
 102 "   vec4 g_depth_bounds;\n"
 103 "   float g_water_fog;\n"
 104 "   float g_time;\n"
 105 "   int g_light_count;\n"
 106 "   int g_light_preview;\n"
 107 "   int g_shadow_samples;\n"
 108 "\n"
 109 "   int g_debug_indices;\n"
 110 "   int g_debug_complexity;\n"
 111 "\n"
 112 "   // g_time ?\n"
 113 "\n"
 114 "   //vec4 g_point_light_positions[32];\n"
 115 "   //vec4 g_point_light_colours[32];\n"
 116 "};\n"
 117 "\n"
 118 "uniform sampler2D g_world_depth;\n"
 119 "\n"
 120 "float world_depth_sample( vec3 pos )\n"
 121 "{\n"
 122 "   vec2 depth_coord = (pos.xz - g_depth_bounds.xy) * g_depth_bounds.zw; \n"
 123 "   return texture( g_world_depth, depth_coord ).r;\n"
 124 "}\n"
 125 "\n"
 126 "float world_water_depth( vec3 pos )\n"
 127 "{\n"
 128 "   vec2 depth_coord = (pos.xz - g_depth_bounds.xy) * g_depth_bounds.zw; \n"
 129 "   float ref_depth = g_water_plane.y*g_water_plane.w;\n"
 130 "   return texture( g_world_depth, depth_coord ).g - ref_depth;\n"
 131 "}\n"
 132 "\n"
 133 "float shadow_sample( vec3 vdir )\n"
 134 "{\n"
 135 "   vec3 sample_pos = aWorldCo + vdir;\n"
 136 "   float height_sample = world_depth_sample( sample_pos );\n"
 137 "\n"
 138 "   float fdelta = height_sample - sample_pos.y;\n"
 139 "   return clamp( fdelta, 0.1, 0.2 )-0.1;\n"
 140 "}\n"
 141 "\n"
 142 "vec3 apply_fog( vec3 vfrag, float fdist )\n"
 143 "{\n"
 144 "   float dist = pow(fdist*0.0008,1.2);\n"
 145 "   return mix( vfrag, vec3(0.55,0.76,1.0), min( 1.0, dist ) );\n"
 146 "}\n"
 147 "\n"
 148 "\n"
 149 "// New lighting model\n"
 150 "\n"
 151 "vec3 newlight_compute_ambient()\n"
 152 "{\n"
 153 "   return g_ambient_colour.rgb;\n"
 154 "}\n"
 155 "\n"
 156 "float newlight_compute_sun_shadow( vec3 dir )\n"
 157 "{\n"
 158 "   if( g_shadow_samples == 0 )\n"
 159 "   {\n"
 160 "      return 1.0;\n"
 161 "   }\n"
 162 "\n"
 163 "   float fspread = g_light_colours[0].w;\n"
 164 "   vec3  vdir = dir;\n"
 165 "   float flength = g_light_directions[0].w;\n"
 166 "\n"
 167 "   float famt = 0.0;\n"
 168 "   famt+=shadow_sample((vdir+vec3(-0.563, 0.550, 0.307)*fspread)*flength*0.1);\n"
 169 "   famt+=shadow_sample((vdir+vec3( 0.808, 0.686, 0.346)*fspread)*flength*0.2);\n"
 170 "   famt+=shadow_sample((vdir+vec3( 0.787, 0.074,-0.065)*fspread)*flength*0.3);\n"
 171 "   famt+=shadow_sample((vdir+vec3(-0.593, 0.071,-0.425)*fspread)*flength*0.4);\n"
 172 "   famt+=shadow_sample((vdir+vec3(-0.790,-0.933,-0.875)*fspread)*flength*0.5);\n"
 173 "   famt+=shadow_sample((vdir+vec3( 0.807,-0.690, 0.472)*fspread)*flength*0.6);\n"
 174 "   famt+=shadow_sample((vdir+vec3( 0.522,-0.379, 0.350)*fspread)*flength*0.7);\n"
 175 "   famt+=shadow_sample((vdir+vec3( 0.483, 0.201, 0.306)*fspread)*flength*0.8);\n"
 176 "\n"
 177 "   return 1.0 - famt;\n"
 178 "}\n"
 179 "\n"
 180 "vec3 newlight_compute_world_diffuse( vec3 wnormal )\n"
 181 "{\n"
 182 "   vec3 vtotal = g_ambient_colour.rgb;\n"
 183 "\n"
 184 "   for( int i=0; i<g_light_count; i++ )\n"
 185 "   {\n"
 186 "      vec3 vcolour = g_light_colours[i].rgb;\n"
 187 "      vec3 vdir = g_light_directions[i].xyz;\n"
 188 "\n"
 189 "      float flight = max(dot( vdir, wnormal )*0.75+0.25,0.0);\n"
 190 "      vtotal += vcolour*flight;\n"
 191 "   }\n"
 192 "\n"
 193 "   return vtotal;\n"
 194 "}\n"
 195 "\n"
 196 "vec3 newlight_compute_sun_spec( vec3 wnormal, vec3 halfview, float fintensity )\n"
 197 "{\n"
 198 "   vec3 vcolour = g_light_colours[0].rgb;\n"
 199 "   vec3 vdir = g_light_directions[0].xyz;\n"
 200 "\n"
 201 "   vec3 specdir = reflect( -vdir, wnormal );\n"
 202 "   float spec = pow(max(dot( halfview, specdir ), 0.0), 10.0);\n"
 203 "   return vcolour*spec*fintensity;\n"
 204 "}\n"
 205 "\n"
 206 "float newlight_specular( vec3 wnormal, vec3 dir, vec3 halfview, float exponent )\n"
 207 "{\n"
 208 "   vec3 specdir = reflect( -dir, wnormal );\n"
 209 "   return pow(max(dot( halfview, specdir ), 0.0), exponent);\n"
 210 "}\n"
 211 "\n"
 212 "vec3 newlight_compute_quadratic( vec3 wnormal, vec3 halfview, \n"
 213 "                                 vec3 light_colour, vec3 light_pos )\n"
 214 "{\n"
 215 "   vec3 light_delta = (light_pos-aWorldCo) * 10.0;\n"
 216 "\n"
 217 "   float quadratic = dot(light_delta,light_delta);\n"
 218 "   float attenuation = 1.0f/( 1.0f + quadratic );\n"
 219 "   attenuation *= max( 0.0, dot( normalize(light_delta), wnormal ) );\n"
 220 "\n"
 221 "   return light_colour*attenuation;\n"
 222 "}\n"
 223 "\n"
 224 "vec3 newlight_compute_spot( vec3 wnormal, vec3 halfview, \n"
 225 "                            vec3 light_colour, vec3 light_pos,\n"
 226 "                            vec4 light_dir )\n"
 227 "{\n"
 228 "   vec3 light_delta = (light_pos-aWorldCo) * 10.0;\n"
 229 "\n"
 230 "   float quadratic = dot(light_delta,light_delta);\n"
 231 "   float attenuation = 1.0f/( 1.0f + quadratic );\n"
 232 "\n"
 233 "   light_delta = normalize( light_delta );\n"
 234 "   attenuation *= max( 0.0, dot( light_delta, wnormal ) );\n"
 235 "\n"
 236 "   float spot_theta = max( 0.0, dot( light_delta, -light_dir.xyz ) ),\n"
 237 "            falloff = max( 0.0,( spot_theta - light_dir.w ) / (1.0-light_dir.w) );\n"
 238 "\n"
 239 "   return light_colour*attenuation*falloff;\n"
 240 "}\n"
 241 "\n"
 242 "#line     12        0 \n"
 243 "#line       1        2 \n"
 244 "const vec3  DAYSKY_COLOUR   = vec3( 0.37, 0.54, 0.97 );\n"
 245 "const vec3  NIGHTSKY_COLOUR = vec3( 0.03, 0.05, 0.20 );\n"
 246 "const vec3  SUNSET_COLOUR   = vec3( 1.00, 0.32, 0.01 );\n"
 247 "const vec3  AMBIENT_COLOUR  = vec3( 0.13, 0.17, 0.35 );\n"
 248 "const vec3  SUNSET_AMBIENT  = vec3( 0.25, 0.17, 0.51 );\n"
 249 "const vec3  SUN_COLOUR      = vec3( 1.10, 0.89, 0.35 ) * 1.125;\n"
 250 "\n"
 251 "const float SUN_ANGLE       = 0.0001;\n"
 252 "const float TIME_RATE       = 0.025;\n"
 253 "\n"
 254 "const float PI              = 3.14159265;\n"
 255 "\n"
 256 "struct world_info\n"
 257 "{\n"
 258 "   float time,\n"
 259 "         time_of_day,\n"
 260 "         day_phase,\n"
 261 "         sunset_phase;\n"
 262 "   \n"
 263 "   vec3 sun_dir;\n"
 264 "};\n"
 265 "\n"
 266 "float luminance( vec3 v )\n"
 267 "{\n"
 268 "   return dot( v, vec3(0.2126, 0.7152, 0.0722) );\n"
 269 "}\n"
 270 "\n"
 271 "vec3 scene_ambient( vec3 dir, const world_info w )\n"
 272 "{\n"
 273 "   float sun_azimuth  = dot( dir.xz, w.sun_dir.xz ) * 0.4 + 0.6;\n"
 274 "   float sky_gradient = dir.y;\n"
 275 "   \n"
 276 "   /* Blend phase colours */\n"
 277 "   vec3 ambient  = DAYSKY_COLOUR   * (w.day_phase-w.sunset_phase*0.1);\n"
 278 "        ambient += SUNSET_COLOUR   * (1.0-dir.y*0.5) * w.sunset_phase * sun_azimuth;\n"
 279 "        ambient += NIGHTSKY_COLOUR * (1.0-w.day_phase);\n"
 280 "   \n"
 281 "   /* Add gradient */\n"
 282 "        ambient -= sky_gradient * luminance(ambient);\n"
 283 "        \n"
 284 "   return ambient;\n"
 285 "}\n"
 286 "\n"
 287 "vec3 scene_sky( vec3 ray_dir, const world_info w )\n"
 288 "{\n"
 289 "   ray_dir.y = abs( ray_dir.y );\n"
 290 "   vec3 sky_colour  = scene_ambient( ray_dir, w );\n"
 291 "   \n"
 292 "   /* Sun */\n"
 293 "   float sun_theta  = dot( ray_dir, w.sun_dir );\n"
 294 "   float sun_size   = max( 0.0, sun_theta * 0.5 + 0.5 + SUN_ANGLE );\n"
 295 "   float sun_shape  = pow( sun_size, 2000.0 );\n"
 296 "         sun_shape += sun_size * max(w.sun_dir.y,0.0) * 0.5;\n"
 297 "         \n"
 298 "   vec3 sun_colour  = mix( vec3(1.0), SUNSET_COLOUR, w.sunset_phase*0.5 );\n"
 299 "        sun_colour *= sun_shape;\n"
 300 "   \n"
 301 "   vec3 composite   = sky_colour + sun_colour;\n"
 302 "   return composite;\n"
 303 "}\n"
 304 "\n"
 305 "vec3 scene_compute_ambient( vec3 normal, const world_info w )\n"
 306 "{\n"
 307 "   return scene_ambient( (normal * vec3(1.0,-1.0,1.0)) * 0.5 + 0.5, w );\n"
 308 "}\n"
 309 "\n"
 310 "vec3 SR_LIGHT( vec3 normal, vec2 dir, vec3 colour )\n"
 311 "{\n"
 312 "   vec3 dir3 = vec3\n"
 313 "   (\n"
 314 "      cos(dir.y) * cos(dir.x),\n"
 315 "                   sin(dir.x),\n"
 316 "      sin(dir.y) * cos(dir.x)\n"
 317 "   );\n"
 318 "\n"
 319 "   float flight = max( dot( normal, dir3 ) * 0.75 + 0.25, 0.0 );\n"
 320 "   \n"
 321 "   return flight * colour;\n"
 322 "}\n"
 323 "\n"
 324 "vec3 scene_lighting_old( vec3 normal, const world_info w )\n"
 325 "{\n"
 326 "   vec3 SR_COLOUR_SUN  = vec3( 1.36,  1.35, 1.01 );\n"
 327 "   vec3 SR_COLOUR_FILL = vec3( 0.33,  0.56, 0.64 );\n"
 328 "   vec3 SR_COLOUR_RIM  = vec3( 0.05,  0.05, 0.23 );\n"
 329 "   \n"
 330 "   return SR_LIGHT( normal, vec2(  0.63, -0.08 ), SR_COLOUR_SUN ) +\n"
 331 "          SR_LIGHT( normal, vec2( -2.60, -0.13 ), SR_COLOUR_FILL ) + \n"
 332 "          SR_LIGHT( normal, vec2(  2.60, -0.84 ), SR_COLOUR_RIM ) ;\n"
 333 "}\n"
 334 "\n"
 335 "vec3 scene_lighting( vec3 normal, float shadow, vec3 halfview, const world_info w )\n"
 336 "{\n"
 337 "   float fresnel = 1.0 - abs(dot(normal,halfview));\n"
 338 "\n"
 339 "   vec3  sky_reflection = 0.5 * fresnel * mix( DAYSKY_COLOUR, SUNSET_COLOUR, w.sunset_phase );\n"
 340 "   vec3  light_sun      = max(0.0,dot(normal,w.sun_dir)*0.75+0.25) * SUN_COLOUR \n"
 341 "                           * w.day_phase;\n"
 342 "\n"
 343 "   float scaled_shadow = max( shadow, 1.0 - max(w.sun_dir.y,0.0) );\n"
 344 "\n"
 345 "   vec3 ambient = mix( AMBIENT_COLOUR, SUNSET_AMBIENT, w.sunset_phase );\n"
 346 "\n"
 347 "   return ambient + (light_sun + sky_reflection) * shadow;\n"
 348 "\n"
 349 "\n"
 350 "\n"
 351 "\n"
 352 "\n"
 353 "\n"
 354 "   float  sun_theta = dot( normal, w.sun_dir );\n"
 355 "\n"
 356 "   float  softness_min = 0.5;\n"
 357 "   float  softness     = softness_min + w.sunset_phase * (1.0-softness_min);\n"
 358 "   float  light_min    = 0.0 * w.day_phase;\n"
 359 "   float  light_direct = light_min + smoothstep( -softness, softness, sun_theta ) * (1.0-light_min);\n"
 360 "          light_direct *= clamp(w.sun_dir.y * 4.0 + 1.0,0.0,1.0) * shadow;\n"
 361 "   \n"
 362 "   float  light_bounce  = 0.5 + 0.5 * dot( -normal, w.sun_dir );\n"
 363 "          light_bounce *= light_bounce * max( w.sun_dir.y, 0.0 );\n"
 364 "          \n"
 365 "   vec3   light_colour = SUN_COLOUR*w.day_phase + (SUNSET_COLOUR*w.sunset_phase + 0.1);\n"
 366 "   vec3   dark_colour  = mix( AMBIENT_COLOUR, SUNSET_AMBIENT, w.sunset_phase );\n"
 367 "   \n"
 368 "   float  spec         = newlight_specular( normal, w.sun_dir, halfview, 2.0 ) \n"
 369 "                            * 0.2 * shadow * w.day_phase;\n"
 370 "   \n"
 371 "   return mix(dark_colour, light_colour, light_direct) + \n"
 372 "              spec +\n"
 373 "              dark_colour * light_bounce;\n"
 374 "}\n"
 375 "\n"
 376 "void scene_state( float world_time, out world_info w )\n"
 377 "{\n"
 378 "   w.time         = world_time;\n"
 379 "   w.time_of_day  = fract( w.time );\n"
 380 "   w.day_phase    = cos( w.time_of_day * PI * 2.0 )      * 0.5 + 0.5;\n"
 381 "   w.sunset_phase = cos( w.time_of_day * PI * 4.0 + PI ) * 0.5 + 0.5;\n"
 382 "   w.sunset_phase = pow( w.sunset_phase, 6.0 );\n"
 383 "   \n"
 384 "   float a        = w.time_of_day * PI * 2.0;\n"
 385 "   w.sun_dir      = normalize( vec3( sin( a ), cos( a ), 0.2) );\n"
 386 "}\n"
 387 "\n"
 388 "\n"
 389 "#line     13        0 \n"
 390 "\n"
 391 "float sdLine( vec3 p, vec3 a, vec3 b )\n"
 392 "{\n"
 393 "  vec3 pa = p - a;\n"
 394 "  vec3 ba = b - a;\n"
 395 "\n"
 396 "  float h = clamp( dot(pa,ba)/dot(ba,ba), 0.0, 1.0 );\n"
 397 "  return length( pa - ba*h );\n"
 398 "}\n"
 399 "\n"
 400 "float compute_board_shadow()\n"
 401 "{\n"
 402 "   // player shadow\n"
 403 "   float dist_to_player = max( 0.0, sdLine( aWorldCo, uBoard0, uBoard1 )-0.1 );\n"
 404 "   float player_shadow = max( 1.0-dist_to_player*2.7, 0.0 );\n"
 405 "   player_shadow *= player_shadow*player_shadow*player_shadow;\n"
 406 "\n"
 407 "   return 1.0 - player_shadow*0.8;\n"
 408 "}\n"
 409 "\n"
 410 "vec3 scene_apply_fog( vec3 vfrag, vec3 colour, float fdist )\n"
 411 "{\n"
 412 "   float dist = pow(fdist*0.0010,0.78);\n"
 413 "   return mix( vfrag, colour, min( 1.0, dist ) );\n"
 414 "}\n"
 415 "\n"
 416 "vec3 scene_do_lighting( vec3 diffuse, vec3 wnormal )\n"
 417 "{\n"
 418 "   world_info world;\n"
 419 "   scene_state( g_time, world );\n"
 420 "\n"
 421 "   // Lighting\n"
 422 "   vec3 halfview = uCamera - aWorldCo;\n"
 423 "   float fdist = length(halfview);\n"
 424 "   halfview /= fdist;\n"
 425 "\n"
 426 "   vec3 total_light = vec3(0.0);\n"
 427 "\n"
 428 "\n"
 429 "   float world_shadow = newlight_compute_sun_shadow( world.sun_dir \n"
 430 "                                          * (1.0/(max(world.sun_dir.y,0.0)+0.2)) );\n"
 431 "   float board_shadow = compute_board_shadow();\n"
 432 "\n"
 433 "   total_light += scene_lighting( wnormal, min( board_shadow, world_shadow ), \n"
 434 "                                  halfview, world );\n"
 435 "\n"
 436 "   //total_light += scene_lighting_old( wnormal, world );\n"
 437 "\n"
 438 "   // Compute the other lights that exist in the map, not effected by the sun\n"
 439 "   // shadow\n"
 440 "\n"
 441 "   // read lights\n"
 442 "   vec4 light_colour_0 = texelFetch( uLightsArray, light_indices.x*3+0 );\n"
 443 "   vec4 light_colour_1 = texelFetch( uLightsArray, light_indices.y*3+0 );\n"
 444 "   vec4 light_colour_2 = texelFetch( uLightsArray, light_indices.z*3+0 );\n"
 445 "   vec4 light_co_0     = texelFetch( uLightsArray, light_indices.x*3+1 );\n"
 446 "   vec4 light_co_1     = texelFetch( uLightsArray, light_indices.y*3+1 );\n"
 447 "   vec4 light_co_2     = texelFetch( uLightsArray, light_indices.z*3+1 );\n"
 448 "   vec4 light_dir_0    = texelFetch( uLightsArray, light_indices.x*3+2 );\n"
 449 "   vec4 light_dir_1    = texelFetch( uLightsArray, light_indices.y*3+2 );\n"
 450 "   vec4 light_dir_2    = texelFetch( uLightsArray, light_indices.z*3+2 );\n"
 451 "\n"
 452 "   if( g_debug_indices == 1 )\n"
 453 "   {\n"
 454 "      float rings = min( fract(distance(light_co_0.xyz,aWorldCo)),\n"
 455 "                      min( fract(distance(light_co_1.xyz,aWorldCo)),\n"
 456 "                           fract(distance(light_co_2.xyz,aWorldCo)) ) \n"
 457 "                        );\n"
 458 "               \n"
 459 "      return vec3(fract(light_indices.x * 0.125), fract(light_indices.y*0.125),\n"
 460 "                  fract(light_indices.z * 0.125 )) + (rings-0.5) * 0.25;\n"
 461 "   }\n"
 462 "\n"
 463 "   if( g_debug_complexity == 1 )\n"
 464 "   {\n"
 465 "      return vec3(1.0,0.0,0.0) * ( light_indices.w/3.0 );\n"
 466 "   }\n"
 467 "\n"
 468 "   if( light_indices.w >= 1 )\n"
 469 "   {\n"
 470 "      total_light += newlight_compute_spot\n"
 471 "                     ( \n"
 472 "                        wnormal, halfview,\n"
 473 "                        light_colour_0.rgb,\n"
 474 "                        light_co_0.xyz,\n"
 475 "                        light_dir_0\n"
 476 "                     ) * board_shadow \n"
 477 "                       * step( world.day_phase, light_colour_0.w );\n"
 478 "\n"
 479 "      if( light_indices.w >= 2 )\n"
 480 "      {\n"
 481 "         total_light += newlight_compute_spot\n"
 482 "                        ( \n"
 483 "                           wnormal, halfview,\n"
 484 "                           light_colour_1.rgb,\n"
 485 "                           light_co_1.xyz,\n"
 486 "                           light_dir_1\n"
 487 "                        ) * board_shadow\n"
 488 "                          * step( world.day_phase, light_colour_1.w );\n"
 489 "\n"
 490 "         if( light_indices.w >= 3 )\n"
 491 "         {\n"
 492 "            total_light += newlight_compute_spot\n"
 493 "                           ( \n"
 494 "                              wnormal, halfview,\n"
 495 "                              light_colour_2.rgb,\n"
 496 "                              light_co_2.xyz,\n"
 497 "                              light_dir_2\n"
 498 "                           ) * board_shadow\n"
 499 "                             * step( world.day_phase, light_colour_2.w );\n"
 500 "         }\n"
 501 "      }\n"
 502 "   }\n"
 503 "\n"
 504 "   vec3 fog_colour = scene_sky( -halfview, world );\n"
 505 "   \n"
 506 "   return scene_apply_fog( diffuse * total_light, fog_colour, fdist );\n"
 507 "}\n"
 508 "\n"
 509 "#line     13        0 \n"
 510 "#line       1        2 \n"
 511 "const float k_motion_lerp_amount = 0.01;\n"
 512 "\n"
 513 "#line      2        0 \n"
 514 "\n"
 515 "layout (location = 1) out vec2 oMotionVec;\n"
 516 "\n"
 517 "in vec3 aMotionVec0;\n"
 518 "in vec3 aMotionVec1;\n"
 519 "\n"
 520 "void compute_motion_vectors()\n"
 521 "{\n"
 522 "   // Write motion vectors\n"
 523 "   vec2 vmotion0 = aMotionVec0.xy / aMotionVec0.z;\n"
 524 "   vec2 vmotion1 = aMotionVec1.xy / aMotionVec1.z;\n"
 525 "\n"
 526 "   oMotionVec = (vmotion1-vmotion0) * (1.0/k_motion_lerp_amount);\n"
 527 "}\n"
 528 "\n"
 529 "#line     14        0 \n"
 530 "\n"
 531 "vec4 water_surf( vec3 halfview, vec3 vnorm, float depthvalue )\n"
 532 "{\n"
 533 "   vec3 surface_tint = mix(uShoreColour, uOceanColour, depthvalue);\n"
 534 "\n"
 535 "   float ffresnel = pow(1.0-dot( vnorm, halfview ),5.0);\n"
 536 "\n"
 537 "   vec3 lightdir = vec3(0.95,0.0,-0.3);\n"
 538 "   vec3 specdir = reflect( -lightdir, vnorm );\n"
 539 "   float spec = pow(max(dot(halfview,specdir),0.0),20.0)*0.3;\n"
 540 "   \n"
 541 "   return vec4( surface_tint + spec, max(min(depthvalue*4.0, 1.0),0.0) );\n"
 542 "}\n"
 543 "\n"
 544 "void main()\n"
 545 "{\n"
 546 "   compute_motion_vectors();\n"
 547 "\n"
 548 "   // Surface colour composite\n"
 549 "   float depthvalue = clamp( -world_water_depth( aCo )*(1.0/25.0), 0.0, 1.0 );\n"
 550 "\n"
 551 "   vec2 world_coord = aCo.xz * 0.008;\n"
 552 "   vec4 time_offsets = vec4( uTime ) * vec4( 0.008, 0.006, 0.003, 0.03 );\n"
 553 "   vec4 dudva = texture( uTexDudv, world_coord + time_offsets.xy )-0.5;\n"
 554 "   vec4 dudvb = texture( uTexDudv, world_coord *7.0 - time_offsets.zw )-0.5;\n"
 555 "\n"
 556 "   vec3 surfnorm = dudva.rgb + dudvb.rgb;\n"
 557 "   surfnorm = normalize(vec3(0.0,1.0,0.0) + dudva.xyz*0.4 + dudvb.xyz*0.1);\n"
 558 "   \n"
 559 "   // Foam\n"
 560 "   float fband = fract( aCo.z*0.02+uTime*0.1+depthvalue*10.0 );\n"
 561 "   fband = step( fband+dudva.a*0.8, 0.3 ) * max((1.0-depthvalue*4.0),0.0);\n"
 562 "\n"
 563 "   // Lighting\n"
 564 "   vec3 halfview = -normalize( aCo-uCamera );\n"
 565 "\n"
 566 "   // Fog\n"
 567 "   float fdist = pow(length( aCo.xz-uCamera.xz ) * 0.00047, 2.6);\n"
 568 "\n"
 569 "   // Composite\n"
 570 "   vec4 vsurface = water_surf( halfview, surfnorm, depthvalue );\n"
 571 "   vsurface.a -= fdist;\n"
 572 "   oColour = mix( vsurface, vec4(1.0,1.0,1.0,0.5), fband );\n"
 573 "}\n"
 574 ""},
 575 };
 576
 577 static GLuint _uniform_scene_water_fast_uMdl;
 578 static GLuint _uniform_scene_water_fast_uPv;
 579 static GLuint _uniform_scene_water_fast_uPvmPrev;
 580 static GLuint _uniform_scene_water_fast_uTexDudv;
 581 static GLuint _uniform_scene_water_fast_uTime;
 582 static GLuint _uniform_scene_water_fast_uCamera;
 583 static GLuint _uniform_scene_water_fast_uSurfaceY;
 584 static GLuint _uniform_scene_water_fast_uBoard0;
 585 static GLuint _uniform_scene_water_fast_uBoard1;
 586 static GLuint _uniform_scene_water_fast_uShoreColour;
 587 static GLuint _uniform_scene_water_fast_uOceanColour;
 588 static GLuint _uniform_scene_water_fast_uLightsArray;
 589 static GLuint _uniform_scene_water_fast_g_world_depth;
 590 static void shader_scene_water_fast_uMdl(m4x3f m){
 591    glUniformMatrix4x3fv(_uniform_scene_water_fast_uMdl,1,GL_FALSE,(float*)m);
 592 }
 593 static void shader_scene_water_fast_uPv(m4x4f m){
 594    glUniformMatrix4fv(_uniform_scene_water_fast_uPv,1,GL_FALSE,(float*)m);
 595 }
 596 static void shader_scene_water_fast_uPvmPrev(m4x4f m){
 597    glUniformMatrix4fv(_uniform_scene_water_fast_uPvmPrev,1,GL_FALSE,(float*)m);
 598 }
 599 static void shader_scene_water_fast_uTexDudv(int i){
 600    glUniform1i(_uniform_scene_water_fast_uTexDudv,i);
 601 }
 602 static void shader_scene_water_fast_uTime(float f){
 603    glUniform1f(_uniform_scene_water_fast_uTime,f);
 604 }
 605 static void shader_scene_water_fast_uCamera(v3f v){
 606    glUniform3fv(_uniform_scene_water_fast_uCamera,1,v);
 607 }
 608 static void shader_scene_water_fast_uSurfaceY(float f){
 609    glUniform1f(_uniform_scene_water_fast_uSurfaceY,f);
 610 }
 611 static void shader_scene_water_fast_uBoard0(v3f v){
 612    glUniform3fv(_uniform_scene_water_fast_uBoard0,1,v);
 613 }
 614 static void shader_scene_water_fast_uBoard1(v3f v){
 615    glUniform3fv(_uniform_scene_water_fast_uBoard1,1,v);
 616 }
 617 static void shader_scene_water_fast_uShoreColour(v3f v){
 618    glUniform3fv(_uniform_scene_water_fast_uShoreColour,1,v);
 619 }
 620 static void shader_scene_water_fast_uOceanColour(v3f v){
 621    glUniform3fv(_uniform_scene_water_fast_uOceanColour,1,v);
 622 }
 623 static void shader_scene_water_fast_g_world_depth(int i){
 624    glUniform1i(_uniform_scene_water_fast_g_world_depth,i);
 625 }
 626 static void shader_scene_water_fast_register(void){
 627    vg_shader_register( &_shader_scene_water_fast );
 628 }
 629 static void shader_scene_water_fast_use(void){ glUseProgram(_shader_scene_water_fast.id); }
 630 static void shader_scene_water_fast_link(void){
 631    _uniform_scene_water_fast_uMdl = glGetUniformLocation( _shader_scene_water_fast.id, "uMdl" );
 632    _uniform_scene_water_fast_uPv = glGetUniformLocation( _shader_scene_water_fast.id, "uPv" );
 633    _uniform_scene_water_fast_uPvmPrev = glGetUniformLocation( _shader_scene_water_fast.id, "uPvmPrev" );
 634    _uniform_scene_water_fast_uTexDudv = glGetUniformLocation( _shader_scene_water_fast.id, "uTexDudv" );
 635    _uniform_scene_water_fast_uTime = glGetUniformLocation( _shader_scene_water_fast.id, "uTime" );
 636    _uniform_scene_water_fast_uCamera = glGetUniformLocation( _shader_scene_water_fast.id, "uCamera" );
 637    _uniform_scene_water_fast_uSurfaceY = glGetUniformLocation( _shader_scene_water_fast.id, "uSurfaceY" );
 638    _uniform_scene_water_fast_uBoard0 = glGetUniformLocation( _shader_scene_water_fast.id, "uBoard0" );
 639    _uniform_scene_water_fast_uBoard1 = glGetUniformLocation( _shader_scene_water_fast.id, "uBoard1" );
 640    _uniform_scene_water_fast_uShoreColour = glGetUniformLocation( _shader_scene_water_fast.id, "uShoreColour" );
 641    _uniform_scene_water_fast_uOceanColour = glGetUniformLocation( _shader_scene_water_fast.id, "uOceanColour" );
 642    _uniform_scene_water_fast_uLightsArray = glGetUniformLocation( _shader_scene_water_fast.id, "uLightsArray" );
 643    _uniform_scene_water_fast_g_world_depth = glGetUniformLocation( _shader_scene_water_fast.id, "g_world_depth" );
 644 }
 645 #endif /* SHADER_scene_water_fast_H */