shaders/model_character_view.h

   1 #ifndef SHADER_model_character_view_H
   2 #define SHADER_model_character_view_H
   3 static void shader_model_character_view_link(void);
   4 static void shader_model_character_view_register(void);
   5 static struct vg_shader _shader_model_character_view = {
   6    .name = "model_character_view",
   7    .link = shader_model_character_view_link,
   8    .vs =
   9 {
  10 .orig_file = "shaders/model_skinned.vs",
  11 .static_src =
  12 "layout (location=0) in vec3 a_co;\n"
  13 "layout (location=1) in vec3 a_norm;\n"
  14 "layout (location=2) in vec2 a_uv;\n"
  15 "layout (location=3) in vec4 a_colour;\n"
  16 "layout (location=4) in vec4 a_weights;\n"
  17 "layout (location=5) in ivec4 a_groups;\n"
  18 "\n"
  19 "#line       1        1 \n"
  20 "const float k_motion_lerp_amount = 0.01;\n"
  21 "\n"
  22 "#line      2        0 \n"
  23 "\n"
  24 "out vec3 aMotionVec0;\n"
  25 "out vec3 aMotionVec1;\n"
  26 "\n"
  27 "void vs_motion_out( vec4 vproj0, vec4 vproj1 )\n"
  28 "{\n"
  29 "   // This magically solves some artifacting errors!\n"
  30 "   //\n"
  31 "   vproj1 = vproj0*(1.0-k_motion_lerp_amount) + vproj1*k_motion_lerp_amount;\n"
  32 "\n"
  33 "   aMotionVec0 = vec3( vproj0.xy, vproj0.w );\n"
  34 "   aMotionVec1 = vec3( vproj1.xy, vproj1.w );\n"
  35 "}\n"
  36 "\n"
  37 "#line      9        0 \n"
  38 "\n"
  39 "uniform mat4 uPv;\n"
  40 "uniform mat4x3 uTransforms[32];\n"
  41 "\n"
  42 "out vec4 aColour;\n"
  43 "out vec2 aUv;\n"
  44 "out vec3 aNorm;\n"
  45 "out vec3 aCo;\n"
  46 "out vec3 aWorldCo;\n"
  47 "\n"
  48 "void main()\n"
  49 "{\n"
  50 "   vec4 co_local = vec4( a_co, 1.0 );\n"
  51 "   vec3 co0 = uTransforms[ a_groups[0] ] * co_local;\n"
  52 "   vec3 co1 = uTransforms[ a_groups[1] ] * co_local;\n"
  53 "   vec3 co2 = uTransforms[ a_groups[2] ] * co_local;\n"
  54 "   vec3 n0  = mat3(uTransforms[ a_groups[0] ]) * a_norm;\n"
  55 "   vec3 n1  = mat3(uTransforms[ a_groups[1] ]) * a_norm;\n"
  56 "   vec3 n2  = mat3(uTransforms[ a_groups[2] ]) * a_norm;\n"
  57 "\n"
  58 "   vec3 world_pos    = co0*a_weights[0] + co1*a_weights[1] + co2*a_weights[2];\n"
  59 "   vec3 world_normal = n0*a_weights[0]  + n1*a_weights[1]  + n2*a_weights[2];\n"
  60 "   \n"
  61 "   gl_Position = uPv * vec4( world_pos, 1.0 );\n"
  62 "   aColour = a_colour;\n"
  63 "   aUv = a_uv;\n"
  64 "   aNorm = world_normal;\n"
  65 "   aCo = a_co;\n"
  66 "   aWorldCo = world_pos;\n"
  67 "\n"
  68 "   // TODO: motion vectors\n"
  69 "   aMotionVec0 = vec3(1.0);\n"
  70 "   aMotionVec1 = vec3(1.0);\n"
  71 "}\n"
  72 ""},
  73    .fs =
  74 {
  75 .orig_file = "shaders/model_character_view.fs",
  76 .static_src =
  77 "uniform sampler2D uTexMain;\n"
  78 "uniform vec3 uCamera;\n"
  79 "\n"
  80 "in vec4 aColour;\n"
  81 "in vec2 aUv;\n"
  82 "in vec3 aNorm;\n"
  83 "in vec3 aCo;\n"
  84 "in vec3 aWorldCo;\n"
  85 "\n"
  86 "#line       1        1 \n"
  87 "layout (location = 0) out vec4 oColour;\n"
  88 "\n"
  89 "// OpenGL wiki: Recommends do not use vec3 because of drivers. hence the v4s...\n"
  90 "layout (std140) uniform ub_world_lighting\n"
  91 "{\n"
  92 "   vec4 g_cube_min;\n"
  93 "   vec4 g_cube_inv_range;\n"
  94 "\n"
  95 "   vec4 g_water_plane;\n"
  96 "   vec4 g_depth_bounds;\n"
  97 "\n"
  98 "   vec4 g_daysky_colour;\n"
  99 "   vec4 g_nightsky_colour;\n"
 100 "   vec4 g_sunset_colour;\n"
 101 "   vec4 g_ambient_colour;\n"
 102 "   vec4 g_sunset_ambient;\n"
 103 "   vec4 g_sun_colour;\n"
 104 "   vec4 g_sun_dir;\n"
 105 "\n"
 106 "   float g_water_fog;\n"
 107 "   float g_time;\n"
 108 "   float g_realtime;\n"
 109 "   float g_shadow_length;\n"
 110 "   float g_shadow_spread;\n"
 111 "\n"
 112 "   float g_time_of_day;\n"
 113 "   float g_day_phase;\n"
 114 "   float g_sunset_phase;\n"
 115 "\n"
 116 "   int g_light_preview;\n"
 117 "   int g_shadow_samples;\n"
 118 "\n"
 119 "   int g_debug_indices;\n"
 120 "   int g_debug_complexity;\n"
 121 "};\n"
 122 "\n"
 123 "uniform sampler2D g_world_depth;\n"
 124 "uniform samplerBuffer uLightsArray;\n"
 125 "uniform usampler3D uLightsIndex;\n"
 126 "\n"
 127 "#line       1        1 \n"
 128 "//const vec3  DAYSKY_COLOUR   = vec3( 0.37, 0.54, 0.97 );\n"
 129 "//const vec3  NIGHTSKY_COLOUR = vec3( 0.03, 0.05, 0.20 );\n"
 130 "//const vec3  SUNSET_COLOUR   = vec3( 1.00, 0.32, 0.01 );\n"
 131 "//const vec3  AMBIENT_COLOUR  = vec3( 0.13, 0.17, 0.35 );\n"
 132 "//const vec3  SUNSET_AMBIENT  = vec3( 0.25, 0.17, 0.51 );\n"
 133 "//const vec3  SUN_COLOUR      = vec3( 1.10, 0.89, 0.35 );\n"
 134 "\n"
 135 "const float SUN_ANGLE       = 0.0001;\n"
 136 "const float PI              = 3.14159265;\n"
 137 "\n"
 138 "//struct world_info\n"
 139 "//{\n"
 140 "//   float time,\n"
 141 "//         time_of_day,\n"
 142 "//         day_phase,\n"
 143 "//         sunset_phase;\n"
 144 "//   \n"
 145 "//   vec3 sun_dir;\n"
 146 "//};\n"
 147 "\n"
 148 "float luminance( vec3 v )\n"
 149 "{\n"
 150 "   return dot( v, vec3(0.2126, 0.7152, 0.0722) );\n"
 151 "}\n"
 152 "\n"
 153 "vec3 clearskies_ambient( vec3 dir )\n"
 154 "{\n"
 155 "   float sun_azimuth  = g_sunset_phase * (dot( dir.xz, g_sun_dir.xz )*0.4+0.6);\n"
 156 "   float sky_gradient = dir.y;\n"
 157 "   \n"
 158 "   /* Blend phase colours */\n"
 159 "   vec3 ambient  = g_daysky_colour.rgb   * (g_day_phase-g_sunset_phase*0.1);\n"
 160 "        ambient += g_sunset_colour.rgb   * (1.0-dir.y*0.5)*sun_azimuth;\n"
 161 "        ambient += g_nightsky_colour.rgb * (1.0-g_day_phase);\n"
 162 "   \n"
 163 "   /* Add gradient */\n"
 164 "        ambient -= sky_gradient * luminance(ambient);\n"
 165 "        \n"
 166 "   return ambient;\n"
 167 "}\n"
 168 "\n"
 169 "vec3 clearskies_sky( vec3 ray_dir )\n"
 170 "{\n"
 171 "   ray_dir.y = abs( ray_dir.y );\n"
 172 "   vec3 sky_colour  = clearskies_ambient( ray_dir );\n"
 173 "   \n"
 174 "   /* Sun */\n"
 175 "   float sun_theta  = dot( ray_dir, g_sun_dir.xyz );\n"
 176 "   float sun_size   = max( 0.0, sun_theta * 0.5 + 0.5 + SUN_ANGLE );\n"
 177 "   float sun_shape  = pow( sun_size, 2000.0 );\n"
 178 "         sun_shape += sun_size * max(g_sun_dir.y,0.0) * 0.5;\n"
 179 "         \n"
 180 "   vec3 sun_colour  = mix( vec3(1.0), g_sunset_colour.rgb, g_sunset_phase*0.5 );\n"
 181 "        sun_colour *= sun_shape;\n"
 182 "   \n"
 183 "   vec3 composite   = sky_colour + sun_colour;\n"
 184 "   return composite;\n"
 185 "}\n"
 186 "\n"
 187 "vec3 clearskies_lighting( vec3 normal, float shadow, vec3 halfview )\n"
 188 "{\n"
 189 "   float fresnel = 1.0 - abs(dot(normal,halfview));\n"
 190 "\n"
 191 "   vec3  reflect_colour = mix( g_daysky_colour.rgb, g_sunset_colour.rgb, \n"
 192 "                               g_sunset_phase );\n"
 193 "\n"
 194 "   vec3  sky_reflection = 0.5 * fresnel * reflect_colour;\n"
 195 "   vec3  light_sun      = max(0.0,dot(normal,g_sun_dir.xyz)*0.75+0.25) \n"
 196 "                           * g_sun_colour.rgb * g_day_phase;\n"
 197 "\n"
 198 "   float scaled_shadow = max( shadow, 1.0 - max(g_sun_dir.y,0.0) );\n"
 199 "   vec3 ambient = mix( g_ambient_colour.rgb, g_sunset_ambient.rgb, \n"
 200 "                       g_sunset_phase );\n"
 201 "\n"
 202 "   return ambient + (light_sun + sky_reflection) * shadow;\n"
 203 "}\n"
 204 "\n"
 205 "#line     42        0 \n"
 206 "\n"
 207 "float world_depth_sample( vec3 pos )\n"
 208 "{\n"
 209 "   vec2 depth_coord = (pos.xz - g_depth_bounds.xy) * g_depth_bounds.zw; \n"
 210 "   return texture( g_world_depth, depth_coord ).r;\n"
 211 "}\n"
 212 "\n"
 213 "float world_water_depth( vec3 pos )\n"
 214 "{\n"
 215 "   float ref_depth = g_water_plane.y*g_water_plane.w;\n"
 216 "   return world_depth_sample( pos ) - ref_depth;\n"
 217 "}\n"
 218 "\n"
 219 "float shadow_sample( vec3 vdir )\n"
 220 "{\n"
 221 "   vec3 sample_pos = aWorldCo + vdir;\n"
 222 "   float height_sample = world_depth_sample( sample_pos );\n"
 223 "\n"
 224 "   float fdelta = height_sample - sample_pos.y;\n"
 225 "   return clamp( fdelta, 0.2, 0.4 )-0.2;\n"
 226 "}\n"
 227 "\n"
 228 "float newlight_compute_sun_shadow( vec3 dir )\n"
 229 "{\n"
 230 "   if( g_shadow_samples == 0 )\n"
 231 "   {\n"
 232 "      return 1.0;\n"
 233 "   }\n"
 234 "\n"
 235 "   float fspread = g_shadow_spread;\n"
 236 "   float flength = g_shadow_length;\n"
 237 "\n"
 238 "   float famt = 0.0;\n"
 239 "   famt += shadow_sample((dir+vec3(-0.56,0.55, 0.30)*fspread)*flength*0.1);\n"
 240 "   famt += shadow_sample((dir+vec3( 0.80,0.68, 0.34)*fspread)*flength*0.2);\n"
 241 "   famt += shadow_sample((dir+vec3( 0.78,0.07,-0.06)*fspread)*flength*0.3);\n"
 242 "   famt += shadow_sample((dir+vec3(-0.59,0.07,-0.42)*fspread)*flength*0.4);\n"
 243 "\n"
 244 "   //famt+=shadow_sample((dir+vec3(-0.790,-0.933,-0.875)*fspread)*flength*0.5);\n"
 245 "   //famt+=shadow_sample((dir+vec3( 0.807,-0.690, 0.472)*fspread)*flength*0.6);\n"
 246 "   //famt+=shadow_sample((dir+vec3( 0.522,-0.379, 0.350)*fspread)*flength*0.7);\n"
 247 "   //famt+=shadow_sample((dir+vec3( 0.483, 0.201, 0.306)*fspread)*flength*0.8);\n"
 248 "\n"
 249 "   return 1.0 - famt;\n"
 250 "}\n"
 251 "\n"
 252 "float newlight_specular( vec3 wnormal, vec3 dir, vec3 halfview, float exponent )\n"
 253 "{\n"
 254 "   vec3 specdir = reflect( -dir, wnormal );\n"
 255 "   return pow(max(dot( halfview, specdir ), 0.0), exponent);\n"
 256 "}\n"
 257 "\n"
 258 "vec3 scene_apply_fog( vec3 vfrag, vec3 colour, float fdist )\n"
 259 "{\n"
 260 "   float dist = pow(fdist*0.0010,0.78);\n"
 261 "   return mix( vfrag, colour, min( 1.0, dist ) );\n"
 262 "}\n"
 263 "\n"
 264 "vec3 rand33(vec3 p3)\n"
 265 "{\n"
 266 "       p3 = fract(p3 * vec3(.1031, .1030, .0973));\n"
 267 "   p3 += dot(p3, p3.yxz+33.33);\n"
 268 "   return fract((p3.xxy + p3.yxx)*p3.zyx);\n"
 269 "}\n"
 270 "\n"
 271 "vec3 scene_calculate_light( int light_index, \n"
 272 "                            vec3 halfview, vec3 co, vec3 normal )\n"
 273 "{\n"
 274 "   vec4 light_colour = texelFetch( uLightsArray, light_index+0 );\n"
 275 "   vec4 light_co     = texelFetch( uLightsArray, light_index+1 );\n"
 276 "   vec4 light_dir    = texelFetch( uLightsArray, light_index+2 );\n"
 277 "\n"
 278 "   vec3 light_delta = light_co.xyz-co;\n"
 279 "   float dist2 = dot(light_delta,light_delta);\n"
 280 "\n"
 281 "   light_delta = normalize( light_delta );\n"
 282 "\n"
 283 "   float quadratic = dist2*100.0;\n"
 284 "   float attenuation  = 1.0f/( 1.0f + quadratic );\n"
 285 "         attenuation *= max( dot( light_delta, normal ), 0.0 );\n"
 286 "\n"
 287 "   float falloff = max( 0.0, 1.0-(dist2*light_co.w) );\n"
 288 "\n"
 289 "   if( light_dir.w < 0.999999 ){\n"
 290 "      float spot_theta = max( 0.0, dot( light_delta, -light_dir.xyz ) );\n"
 291 "      falloff *= max( 0.0, (spot_theta - light_dir.w) / (1.0-light_dir.w) );\n"
 292 "   }\n"
 293 "\n"
 294 "   return light_colour.rgb * attenuation * falloff \n"
 295 "            * step( g_day_phase, light_colour.w );\n"
 296 "}\n"
 297 "\n"
 298 "vec3 scene_calculate_packed_light_patch( uint packed_index, \n"
 299 "                                         vec3 halfview, vec3 co, vec3 normal )\n"
 300 "{\n"
 301 "   uint light_count = packed_index & 0x3u;\n"
 302 "\n"
 303 "   vec3 l = vec3(0.0);\n"
 304 "\n"
 305 "   if( light_count >= 1u ){\n"
 306 "      int index_0 = int( ((packed_index >>  2u) & 0x3ffu) * 3u );\n"
 307 "      int index_1 = int( ((packed_index >> 12u) & 0x3ffu) * 3u );\n"
 308 "      int index_2 = int( ((packed_index >> 22u) & 0x3ffu) * 3u );\n"
 309 "\n"
 310 "      l += scene_calculate_light( index_0, halfview, co, normal );\n"
 311 "\n"
 312 "      if( light_count >= 2u ){\n"
 313 "         l += scene_calculate_light( index_1, halfview, co, normal );\n"
 314 "\n"
 315 "         if( light_count >= 3u ){\n"
 316 "            l += scene_calculate_light( index_2, halfview, co, normal );\n"
 317 "         }\n"
 318 "      }\n"
 319 "   }\n"
 320 "\n"
 321 "   return l;\n"
 322 "}\n"
 323 "\n"
 324 "vec3 world_compute_lighting( vec3 diffuse, vec3 normal, vec3 co,\n"
 325 "                             float light_mask )\n"
 326 "{\n"
 327 "   if( g_light_preview == 1 )\n"
 328 "      diffuse = vec3(0.75);\n"
 329 "\n"
 330 "   // Lighting\n"
 331 "   vec3 halfview = uCamera - co;\n"
 332 "   float fdist = length(halfview);\n"
 333 "   halfview /= fdist;\n"
 334 "\n"
 335 "   float world_shadow = newlight_compute_sun_shadow( g_sun_dir.xyz \n"
 336 "                                    * (1.0/(max(g_sun_dir.y,0.0)+0.2)) );\n"
 337 "\n"
 338 "   vec3 total_light = clearskies_lighting( \n"
 339 "                           normal, min( light_mask, world_shadow ), halfview );\n"
 340 "\n"
 341 "   vec3 cube_coord = (co - g_cube_min.xyz) * g_cube_inv_range.xyz;\n"
 342 "        cube_coord = floor( cube_coord );\n"
 343 "\n"
 344 "   if( g_debug_indices == 1 )\n"
 345 "   {\n"
 346 "      return rand33(cube_coord);\n"
 347 "   }\n"
 348 "\n"
 349 "   if( g_debug_complexity == 1 )\n"
 350 "   {\n"
 351 "      ivec3 coord = ivec3( cube_coord );\n"
 352 "      uvec4 index_sample = texelFetch( uLightsIndex, coord, 0 );\n"
 353 "\n"
 354 "      uint light_count = (index_sample.x & 0x3u) + (index_sample.y & 0x3u);\n"
 355 "      return vec3( float(light_count)*(1.0/6.0), 0.0, 0.5 );\n"
 356 "   }\n"
 357 "\n"
 358 "   // FIXME: this coord should absolutely must be clamped!\n"
 359 "   \n"
 360 "   ivec3 coord = ivec3( cube_coord );\n"
 361 "   uvec4 index_sample = texelFetch( uLightsIndex, coord, 0 );\n"
 362 "\n"
 363 "   total_light += \n"
 364 "      scene_calculate_packed_light_patch( index_sample.x,\n"
 365 "                                          halfview, co, normal ) \n"
 366 "                                          * light_mask;\n"
 367 "   total_light += \n"
 368 "      scene_calculate_packed_light_patch( index_sample.y,\n"
 369 "                                          halfview, co, normal )\n"
 370 "                                          * light_mask;\n"
 371 "\n"
 372 "   // Take a section of the sky function to give us a matching fog colour\n"
 373 "\n"
 374 "   vec3 fog_colour  = clearskies_ambient( -halfview );\n"
 375 "   float sun_theta  = dot( -halfview, g_sun_dir.xyz );\n"
 376 "   float sun_size   = max( 0.0, sun_theta * 0.5 + 0.5 );\n"
 377 "   float sun_shape  = sun_size * max(g_sun_dir.y,0.0) * 0.5;\n"
 378 "         \n"
 379 "   vec3 sun_colour  = mix( vec3(1.0), g_sunset_colour.rgb, g_sunset_phase*0.5 );\n"
 380 "        sun_colour *= sun_shape;\n"
 381 "\n"
 382 "   fog_colour += sun_colour;\n"
 383 "   return scene_apply_fog( diffuse * total_light, fog_colour, fdist );\n"
 384 "}\n"
 385 "\n"
 386 "#line     11        0 \n"
 387 "#line       1        2 \n"
 388 "const float k_motion_lerp_amount = 0.01;\n"
 389 "\n"
 390 "#line      2        0 \n"
 391 "\n"
 392 "layout (location = 1) out vec2 oMotionVec;\n"
 393 "\n"
 394 "in vec3 aMotionVec0;\n"
 395 "in vec3 aMotionVec1;\n"
 396 "\n"
 397 "void compute_motion_vectors()\n"
 398 "{\n"
 399 "   // Write motion vectors\n"
 400 "   vec2 vmotion0 = aMotionVec0.xy / aMotionVec0.z;\n"
 401 "   vec2 vmotion1 = aMotionVec1.xy / aMotionVec1.z;\n"
 402 "\n"
 403 "   oMotionVec = (vmotion1-vmotion0) * (1.0/k_motion_lerp_amount);\n"
 404 "}\n"
 405 "\n"
 406 "#line     12        0 \n"
 407 "\n"
 408 "void main()\n"
 409 "{\n"
 410 "   compute_motion_vectors();\n"
 411 "\n"
 412 "   vec3 qnorm     = normalize(floor(aNorm*2.0)*0.5) + vec3(0.001,0.0,0.0);\n"
 413 "   vec3 diffuse   = texture( uTexMain, aUv ).rgb;\n"
 414 "   vec3 composite = world_compute_lighting( diffuse, qnorm, aWorldCo, 1.0 );\n"
 415 "\n"
 416 "   float dist    = distance( aWorldCo, uCamera ) - 0.08;\n"
 417 "   float opacity = clamp( dist*dist, 0.0, 1.0 );\n"
 418 "\n"
 419 "   oColour = vec4( composite, opacity );\n"
 420 "}\n"
 421 ""},
 422 };
 423
 424 static GLuint _uniform_model_character_view_uPv;
 425 static GLuint _uniform_model_character_view_uTransforms;
 426 static GLuint _uniform_model_character_view_uTexMain;
 427 static GLuint _uniform_model_character_view_uCamera;
 428 static GLuint _uniform_model_character_view_g_world_depth;
 429 static GLuint _uniform_model_character_view_uLightsArray;
 430 static GLuint _uniform_model_character_view_uLightsIndex;
 431 static void shader_model_character_view_uPv(m4x4f m){
 432    glUniformMatrix4fv(_uniform_model_character_view_uPv,1,GL_FALSE,(float*)m);
 433 }
 434 static void shader_model_character_view_uTexMain(int i){
 435    glUniform1i(_uniform_model_character_view_uTexMain,i);
 436 }
 437 static void shader_model_character_view_uCamera(v3f v){
 438    glUniform3fv(_uniform_model_character_view_uCamera,1,v);
 439 }
 440 static void shader_model_character_view_g_world_depth(int i){
 441    glUniform1i(_uniform_model_character_view_g_world_depth,i);
 442 }
 443 static void shader_model_character_view_register(void){
 444    vg_shader_register( &_shader_model_character_view );
 445 }
 446 static void shader_model_character_view_use(void){ glUseProgram(_shader_model_character_view.id); }
 447 static void shader_model_character_view_link(void){
 448    _uniform_model_character_view_uPv = glGetUniformLocation( _shader_model_character_view.id, "uPv" );
 449    _uniform_model_character_view_uTransforms = glGetUniformLocation( _shader_model_character_view.id, "uTransforms" );
 450    _uniform_model_character_view_uTexMain = glGetUniformLocation( _shader_model_character_view.id, "uTexMain" );
 451    _uniform_model_character_view_uCamera = glGetUniformLocation( _shader_model_character_view.id, "uCamera" );
 452    _uniform_model_character_view_g_world_depth = glGetUniformLocation( _shader_model_character_view.id, "g_world_depth" );
 453    _uniform_model_character_view_uLightsArray = glGetUniformLocation( _shader_model_character_view.id, "uLightsArray" );
 454    _uniform_model_character_view_uLightsIndex = glGetUniformLocation( _shader_model_character_view.id, "uLightsIndex" );
 455 }
 456 #endif /* SHADER_model_character_view_H */