world_render.c

   1 /*
   2  * Copyright (C) 2021-2023 Mt.ZERO Software, Harry Godden - All Rights Reserved
   3  */
   4
   5 #ifndef WORLD_RENDER_C
   6 #define WORLD_RENDER_C
   7
   8 #include "world.h"
   9 #include "world_render.h"
  10 #include "font.h"
  11 #include "gui.h"
  12
  13 static int ccmd_set_time( int argc, const char *argv[] ){
  14    if( argc == 1 ){
  15       world_instance *world = world_current_instance();
  16       world->time = atof( argv[0] );
  17    }
  18    else {
  19       vg_error( "Usage set_time <0-1.0>\n" );
  20    }
  21    return 0;
  22 }
  23
  24 VG_STATIC void async_world_render_init( void *payload, u32 size )
  25 {
  26    vg_info( "Allocate uniform buffers\n" );
  27    for( int i=0; i<4; i++ ){
  28       world_instance *world = &world_static.instances[i];
  29       world->ubo_bind_point = i;
  30
  31       glGenBuffers( 1, &world->ubo_lighting );
  32       glBindBuffer( GL_UNIFORM_BUFFER, world->ubo_lighting );
  33       glBufferData( GL_UNIFORM_BUFFER, sizeof(struct ub_world_lighting),
  34                     NULL, GL_DYNAMIC_DRAW );
  35
  36       glBindBufferBase( GL_UNIFORM_BUFFER, i, world->ubo_lighting );
  37       VG_CHECK_GL_ERR();
  38    }
  39
  40    vg_info( "Allocate frame buffers\n" );
  41    for( int i=0; i<4; i++ ){
  42       world_instance *world = &world_static.instances[i];
  43       struct framebuffer *fb = &world->heightmap;
  44
  45       fb->display_name = NULL;
  46       fb->link = NULL;
  47       fb->fixed_w = 1024;
  48       fb->fixed_h = 1024;
  49       fb->resolution_div = 0;
  50
  51       fb->attachments[0].display_name     = NULL;
  52       fb->attachments[0].purpose = k_framebuffer_attachment_type_texture;
  53       fb->attachments[0].internalformat   = GL_RG16F;
  54       fb->attachments[0].format           = GL_RG;
  55       fb->attachments[0].type             = GL_FLOAT;
  56       fb->attachments[0].attachment       = GL_COLOR_ATTACHMENT0;
  57
  58       fb->attachments[1].purpose = k_framebuffer_attachment_type_none;
  59       fb->attachments[2].purpose = k_framebuffer_attachment_type_none;
  60       fb->attachments[3].purpose = k_framebuffer_attachment_type_none;
  61       fb->attachments[4].purpose = k_framebuffer_attachment_type_none;
  62
  63       render_fb_allocate( fb );
  64    }
  65 }
  66
  67 VG_STATIC void world_render_init(void)
  68 {
  69    VG_VAR_F32( k_day_length );
  70    VG_VAR_I32( k_debug_light_indices );
  71    VG_VAR_I32( k_debug_light_complexity );
  72    VG_VAR_I32( k_light_preview );
  73    vg_console_reg_cmd( "set_time", ccmd_set_time, NULL );
  74
  75    world_render.sky_rate = 1.0;
  76    world_render.sky_target_rate = 1.0;
  77
  78    shader_scene_standard_register();
  79    shader_scene_standard_alphatest_register();
  80    shader_scene_cubemapped_register();
  81    shader_scene_fxglow_register();
  82    shader_scene_vertex_blend_register();
  83    shader_scene_terrain_register();
  84    shader_scene_depth_register();
  85    shader_scene_position_register();
  86    shader_model_sky_register();
  87
  88    vg_info( "Loading world resources\n" );
  89    vg_linear_clear( vg_mem.scratch );
  90
  91    mdl_context msky;
  92    mdl_open( &msky, "models/rs_skydome.mdl", vg_mem.scratch );
  93    mdl_load_metadata_block( &msky, vg_mem.scratch );
  94    mdl_async_load_glmesh( &msky, &world_render.skydome );
  95    mdl_close( &msky );
  96
  97    vg_info( "Loading default world textures\n" );
  98    vg_tex2d_load_qoi_async_file( "textures/garbage.qoi",
  99                                  VG_TEX2D_NEAREST|VG_TEX2D_REPEAT,
 100                                  &world_render.tex_terrain_noise );
 101
 102    vg_async_call( async_world_render_init, NULL, 0 );
 103 }
 104
 105 VG_STATIC void world_link_lighting_ub( world_instance *world, GLuint shader )
 106 {
 107    GLuint idx = glGetUniformBlockIndex( shader, "ub_world_lighting" );
 108    glUniformBlockBinding( shader, idx, world->ubo_bind_point );
 109 }
 110
 111 VG_STATIC void world_bind_position_texture( world_instance *world,
 112                                             GLuint shader, GLuint location,
 113                                             int slot )
 114 {
 115    render_fb_bind_texture( &world->heightmap, 0, slot );
 116    glUniform1i( location, slot );
 117 }
 118
 119 VG_STATIC void world_bind_light_array( world_instance *world,
 120                                        GLuint shader, GLuint location,
 121                                        int slot )
 122 {
 123    glActiveTexture( GL_TEXTURE0 + slot );
 124    glBindTexture( GL_TEXTURE_BUFFER, world->tex_light_entities );
 125    glUniform1i( location, slot );
 126 }
 127
 128 VG_STATIC void world_bind_light_index( world_instance *world,
 129                                        GLuint shader, GLuint location,
 130                                        int slot )
 131 {
 132    glActiveTexture( GL_TEXTURE0 + slot );
 133    glBindTexture( GL_TEXTURE_3D, world->tex_light_cubes );
 134    glUniform1i( location, slot );
 135 }
 136
 137 VG_STATIC void render_world_depth( world_instance *world, camera *cam );
 138
 139 /*
 140  * Rendering
 141  */
 142
 143 VG_STATIC void bind_terrain_noise(void)
 144 {
 145    glActiveTexture( GL_TEXTURE0 );
 146    glBindTexture( GL_TEXTURE_2D, world_render.tex_terrain_noise );
 147 }
 148
 149 struct world_pass{
 150    camera *cam;
 151    enum mdl_shader shader;
 152    enum world_geo_type geo_type;
 153
 154    void (*fn_bind_textures)( world_instance *world,
 155                              struct world_surface *mat );
 156    void (*fn_set_mdl)( m4x3f mdl );
 157    void (*fn_set_uPvmPrev)( m4x4f pvm );
 158 };
 159
 160 VG_STATIC
 161 void world_render_traffic( world_instance *world, u32 material_id,
 162                            struct world_pass *pass ){
 163    if( !mdl_arrcount( &world->ent_traffic ) ) return;
 164
 165    /* HACK: use the first material for every traffic entity */
 166    ent_traffic *first = mdl_arritm( &world->ent_traffic, 0 );
 167    if( !first->submesh_count ) return;
 168
 169    mdl_submesh *sm = mdl_arritm( &world->meta.submeshs, first->submesh_start );
 170    if( sm->material_id != material_id ) return;
 171
 172    struct world_surface *mat = &world->surfaces[ material_id ];
 173    pass->fn_bind_textures( world, mat );
 174
 175    for( u32 j=0; j<mdl_arrcount( &world->ent_traffic ); j++ ){
 176       ent_traffic *traffic = mdl_arritm( &world->ent_traffic, j );
 177
 178       for( u32 k=0; k<traffic->submesh_count; k++ ){
 179          sm = mdl_arritm( &world->meta.submeshs,
 180                            traffic->submesh_start+k );
 181
 182          m4x3f mmdl;
 183          q_m3x3( traffic->transform.q, mmdl );
 184          v3_copy( traffic->transform.co, mmdl[3] );
 185
 186          m4x4f m4mdl;
 187          m4x3_expand( mmdl, m4mdl );
 188          m4x4_mul( pass->cam->mtx_prev.pv, m4mdl, m4mdl );
 189
 190          pass->fn_set_mdl( mmdl );
 191          pass->fn_set_uPvmPrev( m4mdl );
 192
 193          mdl_draw_submesh( sm );
 194       }
 195    }
 196 }
 197
 198 VG_STATIC
 199 void world_render_pass( world_instance *world, struct world_pass *pass ){
 200    for( int i=0; i<world->surface_count; i++ ){
 201       struct world_surface *mat = &world->surfaces[i];
 202
 203       if( mat->info.shader == pass->shader ){
 204          mdl_submesh *sm;
 205
 206          if( pass->geo_type == k_world_geo_type_solid ){
 207             sm = &mat->sm_geo;
 208          }
 209          else{
 210             world_render_traffic( world, i, pass );
 211             sm = &mat->sm_no_collide;
 212          }
 213
 214          if( !sm->indice_count )
 215             continue;
 216
 217          m4x3f mmdl;
 218          m4x3_identity( mmdl );
 219          pass->fn_set_mdl( mmdl );
 220          pass->fn_set_uPvmPrev( pass->cam->mtx_prev.pv );
 221
 222          pass->fn_bind_textures( world, mat );
 223          mdl_draw_submesh( sm );
 224       }
 225    }
 226 }
 227
 228 VG_STATIC
 229 void world_render_both_stages( world_instance *world, struct world_pass *pass )
 230 {
 231    mesh_bind( &world->mesh_geo );
 232    pass->geo_type = k_world_geo_type_solid;
 233    world_render_pass( world, pass );
 234
 235    glDisable( GL_CULL_FACE );
 236    mesh_bind( &world->mesh_no_collide );
 237    pass->geo_type = k_world_geo_type_nonsolid;
 238    world_render_pass( world, pass );
 239    glEnable( GL_CULL_FACE );
 240 }
 241
 242 VG_STATIC void bindpoint_diffuse_texture1( world_instance *world,
 243                                            struct world_surface *mat )
 244
 245 {
 246    glActiveTexture( GL_TEXTURE1 );
 247    glBindTexture( GL_TEXTURE_2D, world->textures[ mat->info.tex_diffuse ] );
 248 }
 249
 250 VG_STATIC void bindpoint_diffuse1_and_cubemap10( world_instance *world,
 251                                                  struct world_surface *mat ){
 252    glActiveTexture( GL_TEXTURE1 );
 253    glBindTexture( GL_TEXTURE_2D, world->textures[ mat->info.tex_diffuse ] );
 254
 255    u32 cubemap_id = mat->info.tex_none0,
 256        cubemap_index = 0;
 257
 258    if( mdl_entity_id_type( cubemap_id ) == k_ent_cubemap ){
 259       cubemap_index = mdl_entity_id_id( cubemap_id );
 260    }
 261
 262    ent_cubemap *cm = mdl_arritm( &world->ent_cubemap, cubemap_index );
 263    glActiveTexture( GL_TEXTURE10 );
 264    glBindTexture( GL_TEXTURE_CUBE_MAP, cm->texture_id );
 265
 266    shader_scene_cubemapped_uColour( mat->info.colour );
 267 }
 268
 269 VG_STATIC void render_world_vb( world_instance *world, camera *cam )
 270 {
 271    shader_scene_vertex_blend_use();
 272    shader_scene_vertex_blend_uTexGarbage(0);
 273    shader_scene_vertex_blend_uTexGradients(1);
 274    world_link_lighting_ub( world, _shader_scene_vertex_blend.id );
 275    world_bind_position_texture( world, _shader_scene_vertex_blend.id,
 276                                 _uniform_scene_vertex_blend_g_world_depth, 2 );
 277    world_bind_light_array( world, _shader_scene_vertex_blend.id,
 278                                 _uniform_scene_vertex_blend_uLightsArray, 3 );
 279    world_bind_light_index( world, _shader_scene_vertex_blend.id,
 280                                 _uniform_scene_vertex_blend_uLightsIndex, 4 );
 281
 282    glActiveTexture( GL_TEXTURE0 );
 283    glBindTexture( GL_TEXTURE_2D, world_render.tex_terrain_noise );
 284
 285    shader_scene_vertex_blend_uPv( cam->mtx.pv );
 286    shader_scene_vertex_blend_uCamera( cam->transform[3] );
 287
 288    struct world_pass pass = {
 289       .shader = k_shader_standard_vertex_blend,
 290       .cam = cam,
 291       .fn_bind_textures = bindpoint_diffuse_texture1,
 292       .fn_set_mdl = shader_scene_vertex_blend_uMdl,
 293       .fn_set_uPvmPrev = shader_scene_vertex_blend_uPvmPrev,
 294    };
 295
 296    world_render_both_stages( world, &pass );
 297 }
 298
 299 VG_STATIC void world_shader_standard_bind( world_instance *world, camera *cam ){
 300    shader_scene_standard_use();
 301    shader_scene_standard_uTexGarbage(0);
 302    shader_scene_standard_uTexMain(1);
 303    shader_scene_standard_uPv( cam->mtx.pv );
 304
 305    world_link_lighting_ub( world, _shader_scene_standard.id );
 306    world_bind_position_texture( world, _shader_scene_standard.id,
 307                                 _uniform_scene_standard_g_world_depth, 2 );
 308    world_bind_light_array( world, _shader_scene_standard.id,
 309                                 _uniform_scene_standard_uLightsArray, 3 );
 310    world_bind_light_index( world, _shader_scene_standard.id,
 311                                 _uniform_scene_standard_uLightsIndex, 4 );
 312
 313    bind_terrain_noise();
 314    shader_scene_standard_uCamera( cam->transform[3] );
 315 }
 316
 317 VG_STATIC void render_world_standard( world_instance *world, camera *cam ){
 318    world_shader_standard_bind( world, cam );
 319    struct world_pass pass = {
 320       .shader = k_shader_standard,
 321       .cam = cam,
 322       .fn_bind_textures = bindpoint_diffuse_texture1,
 323       .fn_set_mdl = shader_scene_standard_uMdl,
 324       .fn_set_uPvmPrev = shader_scene_standard_uPvmPrev,
 325    };
 326
 327    world_render_both_stages( world, &pass );
 328 }
 329
 330 VG_STATIC void render_world_cubemapped( world_instance *world, camera *cam,
 331                                         int layer_depth ){
 332    if( !mdl_arrcount( &world->ent_cubemap ) )
 333       return;
 334
 335    if( layer_depth == -1 ){
 336       world_shader_standard_bind( world, cam );
 337
 338       struct world_pass pass = {
 339          .shader = k_shader_cubemap,
 340          .cam = cam,
 341          .fn_bind_textures = bindpoint_diffuse_texture1,
 342          .fn_set_mdl = shader_scene_standard_uMdl,
 343          .fn_set_uPvmPrev = shader_scene_standard_uPvmPrev,
 344       };
 345
 346       world_render_both_stages( world, &pass );
 347    }
 348    else {
 349       shader_scene_cubemapped_use();
 350       shader_scene_cubemapped_uTexGarbage(0);
 351       shader_scene_cubemapped_uTexMain(1);
 352       shader_scene_cubemapped_uTexCubemap(10);
 353       shader_scene_cubemapped_uPv( cam->mtx.pv );
 354
 355       world_link_lighting_ub( world, _shader_scene_cubemapped.id );
 356       world_bind_position_texture( world, _shader_scene_cubemapped.id,
 357                                    _uniform_scene_cubemapped_g_world_depth, 2 );
 358       world_bind_light_array( world, _shader_scene_cubemapped.id,
 359                                    _uniform_scene_cubemapped_uLightsArray, 3 );
 360       world_bind_light_index( world, _shader_scene_cubemapped.id,
 361                                    _uniform_scene_cubemapped_uLightsIndex, 4 );
 362
 363       bind_terrain_noise();
 364       shader_scene_cubemapped_uCamera( cam->transform[3] );
 365
 366       struct world_pass pass = {
 367          .shader = k_shader_cubemap,
 368          .cam = cam,
 369          .fn_bind_textures = bindpoint_diffuse1_and_cubemap10,
 370          .fn_set_mdl = shader_scene_cubemapped_uMdl,
 371          .fn_set_uPvmPrev = shader_scene_cubemapped_uPvmPrev,
 372       };
 373
 374       world_render_both_stages( world, &pass );
 375    }
 376 }
 377
 378 VG_STATIC void render_world_alphatest( world_instance *world, camera *cam ){
 379    shader_scene_standard_alphatest_use();
 380    shader_scene_standard_alphatest_uTexGarbage(0);
 381    shader_scene_standard_alphatest_uTexMain(1);
 382    shader_scene_standard_alphatest_uPv( cam->mtx.pv );
 383
 384    world_link_lighting_ub( world, _shader_scene_standard_alphatest.id );
 385    world_bind_position_texture( world, _shader_scene_standard_alphatest.id,
 386                         _uniform_scene_standard_alphatest_g_world_depth, 2 );
 387    world_bind_light_array( world, _shader_scene_standard_alphatest.id,
 388                         _uniform_scene_standard_alphatest_uLightsArray, 3 );
 389    world_bind_light_index( world, _shader_scene_standard_alphatest.id,
 390                            _uniform_scene_standard_alphatest_uLightsIndex, 4 );
 391
 392
 393    bind_terrain_noise();
 394
 395
 396    shader_scene_standard_alphatest_uCamera( cam->transform[3] );
 397
 398    glDisable(GL_CULL_FACE);
 399
 400    struct world_pass pass = {
 401       .shader = k_shader_standard_cutout,
 402       .cam = cam,
 403       .fn_bind_textures = bindpoint_diffuse_texture1,
 404       .fn_set_mdl = shader_scene_standard_alphatest_uMdl,
 405       .fn_set_uPvmPrev = shader_scene_standard_alphatest_uPvmPrev,
 406    };
 407
 408    world_render_both_stages( world, &pass );
 409
 410    glEnable(GL_CULL_FACE);
 411 }
 412
 413 VG_STATIC
 414 void world_render_challenges( world_instance *world, struct world_pass *pass,
 415                               v3f pos, int layer_depth ){
 416    if( !world ) return;
 417
 418    /* sort lists */
 419    const f32 radius = 40.0f;
 420    bh_iter it;
 421    bh_iter_init_range( 0, &it, pos, radius );
 422    i32 idx;
 423
 424    u32 challenge_list[ 32 ],
 425        unlock_list[ 32 ];
 426
 427    u32 challenge_count = 0,
 428        unlock_count = 0;
 429
 430    while( bh_next( world->entity_bh, &it, &idx ) ){
 431       u32 id    = world->entity_list[ idx ],
 432           type  = mdl_entity_id_type( id ),
 433           index = mdl_entity_id_id( id );
 434
 435       if( type == k_ent_challenge ) {
 436          if( challenge_count < vg_list_size(challenge_list) )
 437             challenge_list[ challenge_count ++ ] = index;
 438       }
 439       else if( type == k_ent_unlock ){
 440          if( unlock_count < vg_list_size(unlock_list) )
 441             unlock_list[ unlock_count ++ ] = index;
 442       }
 443    }
 444
 445    /* render challenges */
 446    glDisable( GL_CULL_FACE );
 447    mesh_bind( &world->mesh_no_collide );
 448    u32 last_material = 0;
 449    for( u32 i=0; i<challenge_count; i++ ){
 450       u32 index = challenge_list[ i ];
 451       ent_challenge *challenge = mdl_arritm( &world->ent_challenge, index );
 452       if( challenge->flags & k_ent_challenge_hidden ) continue;
 453
 454       f32 dist = v3_dist( challenge->transform.co, pos ) * (1.0f/radius),
 455           scale = vg_smoothstepf( vg_clampf( 10.0f-dist*10.0f, 0.0f,1.0f ) );
 456
 457       v3_fill( challenge->transform.s, scale );
 458
 459       m4x3f mmdl;
 460       mdl_transform_m4x3( &challenge->transform, mmdl );
 461       shader_scene_fxglow_uMdl( mmdl );
 462
 463       for( u32 j=0; j<challenge->submesh_count; j++ ){
 464          mdl_submesh *sm = mdl_arritm( &world->meta.submeshs,
 465                                        challenge->submesh_start + j );
 466
 467          if( sm->material_id != last_material ){
 468             last_material = sm->material_id;
 469
 470             pass->fn_bind_textures( world, &world->surfaces[sm->material_id] );
 471          }
 472
 473          mdl_draw_submesh( sm );
 474       }
 475    }
 476
 477    /* render texts */
 478    shader_scene_font_use();
 479    shader_scene_font_uTexGarbage(0);
 480    shader_scene_font_uTexMain(1);
 481    shader_scene_font_uPv( skaterift.cam.mtx.pv );
 482
 483    /* TODO: Code dupe... */
 484    world_link_lighting_ub( world, _shader_scene_font.id );
 485    world_bind_position_texture( world, _shader_scene_font.id,
 486                                 _uniform_scene_font_g_world_depth, 2 );
 487    world_bind_light_array( world, _shader_scene_font.id,
 488                                 _uniform_scene_font_uLightsArray, 3 );
 489    world_bind_light_index( world, _shader_scene_font.id,
 490                                 _uniform_scene_font_uLightsIndex, 4 );
 491
 492    bind_terrain_noise();
 493    shader_scene_font_uCamera( skaterift.cam.transform[3] );
 494
 495    //shader_scene_font_uColour( (v4f){1.0f,1.0f,1.0f,1.0f} );
 496         glActiveTexture( GL_TEXTURE1 );
 497         glBindTexture( GL_TEXTURE_2D, gui.font.texture );
 498
 499    mesh_bind( &gui.font.mesh );
 500
 501    for( u32 i=0; i<unlock_count; i++ ){
 502       u32 index = unlock_list[ i ];
 503       ent_unlock *unlock = mdl_arritm( &world->ent_unlock, index );
 504       m4x3f mmdl;
 505       mdl_transform_m4x3( &unlock->transform, mmdl );
 506
 507       struct font3d_render render = {
 508          .font = &gui.font,
 509          .variant_id = 1,
 510          .shader = k_font_shader_world
 511       };
 512
 513       font3d_begin( "Test!", &skaterift.cam, mmdl, &render );
 514       font3d_draw( &render );
 515    }
 516 }
 517
 518 VG_STATIC void render_world_fxglow( world_instance *world, camera *cam,
 519                                     int layer_depth ){
 520    shader_scene_fxglow_use();
 521    shader_scene_fxglow_uTexMain(1);
 522    shader_scene_fxglow_uPv( cam->mtx.pv );
 523
 524    world_link_lighting_ub( world, _shader_scene_fxglow.id );
 525    world_bind_position_texture( world, _shader_scene_fxglow.id,
 526                         _uniform_scene_fxglow_g_world_depth, 2 );
 527    world_bind_light_array( world, _shader_scene_fxglow.id,
 528                         _uniform_scene_fxglow_uLightsArray, 3 );
 529    world_bind_light_index( world, _shader_scene_fxglow.id,
 530                            _uniform_scene_fxglow_uLightsIndex, 4 );
 531
 532    shader_scene_fxglow_uCamera( cam->transform[3] );
 533    glDisable(GL_CULL_FACE);
 534
 535    struct world_pass pass = {
 536       .shader = k_shader_fxglow,
 537       .cam = cam,
 538       .fn_bind_textures = bindpoint_diffuse_texture1,
 539       .fn_set_mdl = shader_scene_fxglow_uMdl,
 540       .fn_set_uPvmPrev = shader_scene_fxglow_uPvmPrev,
 541    };
 542
 543    world_render_both_stages( world, &pass );
 544    world_render_challenges( world, &pass, cam->pos, layer_depth );
 545
 546    glEnable(GL_CULL_FACE);
 547 }
 548
 549 VG_STATIC void bindpoint_terrain( world_instance *world,
 550                                   struct world_surface *mat )
 551 {
 552    glActiveTexture( GL_TEXTURE1 );
 553    glBindTexture( GL_TEXTURE_2D, world->textures[ mat->info.tex_diffuse ] );
 554
 555    shader_scene_terrain_uSandColour( mat->info.colour );
 556    shader_scene_terrain_uBlendOffset( mat->info.colour1 );
 557 }
 558
 559 VG_STATIC void render_terrain( world_instance *world, camera *cam )
 560 {
 561    shader_scene_terrain_use();
 562    shader_scene_terrain_uTexGarbage(0);
 563    shader_scene_terrain_uTexGradients(1);
 564
 565    world_link_lighting_ub( world, _shader_scene_terrain.id );
 566    world_bind_position_texture( world, _shader_scene_terrain.id,
 567                         _uniform_scene_terrain_g_world_depth, 2 );
 568    world_bind_light_array( world, _shader_scene_terrain.id,
 569                         _uniform_scene_terrain_uLightsArray, 3 );
 570    world_bind_light_index( world, _shader_scene_terrain.id,
 571                            _uniform_scene_terrain_uLightsIndex, 4 );
 572
 573    glActiveTexture( GL_TEXTURE0 );
 574    glBindTexture( GL_TEXTURE_2D, world_render.tex_terrain_noise );
 575
 576    shader_scene_terrain_uPv( cam->mtx.pv );
 577    shader_scene_terrain_uCamera( cam->transform[3] );
 578
 579    struct world_pass pass = {
 580       .shader = k_shader_terrain_blend,
 581       .cam = cam,
 582       .fn_bind_textures = bindpoint_terrain,
 583       .fn_set_mdl = shader_scene_terrain_uMdl,
 584       .fn_set_uPvmPrev = shader_scene_terrain_uPvmPrev,
 585    };
 586
 587    world_render_both_stages( world, &pass );
 588 }
 589
 590 VG_STATIC void render_sky( world_instance *world, camera *cam )
 591 {
 592    /*
 593     * Modify matrix to remove clipping and view translation
 594     */
 595    m4x4f v,
 596          v_prev,
 597          pv,
 598          pv_prev;
 599
 600    m4x4_copy( cam->mtx.v, v );
 601    m4x4_copy( cam->mtx_prev.v, v_prev );
 602    v3_zero( v[3] );
 603    v3_zero( v_prev[3] );
 604
 605    m4x4_copy( cam->mtx.p,      pv );
 606    m4x4_copy( cam->mtx_prev.p, pv_prev );
 607    m4x4_reset_clipping( pv,      cam->farz, cam->nearz );
 608    m4x4_reset_clipping( pv_prev, cam->farz, cam->nearz );
 609
 610    m4x4_mul( pv,      v,      pv );
 611    m4x4_mul( pv_prev, v_prev, pv_prev );
 612
 613    m4x3f identity_matrix;
 614    m4x3_identity( identity_matrix );
 615
 616    /*
 617     * Draw
 618     */
 619    shader_model_sky_use();
 620    shader_model_sky_uMdl( identity_matrix );
 621    shader_model_sky_uPv( pv );
 622    shader_model_sky_uPvmPrev( pv_prev );
 623    shader_model_sky_uTexGarbage(0);
 624    world_link_lighting_ub( world, _shader_model_sky.id );
 625
 626    glActiveTexture( GL_TEXTURE0 );
 627    glBindTexture( GL_TEXTURE_2D, world_render.tex_terrain_noise );
 628
 629    glDepthMask( GL_FALSE );
 630    glDisable( GL_DEPTH_TEST );
 631
 632    mesh_bind( &world_render.skydome );
 633    mesh_draw( &world_render.skydome );
 634
 635    glEnable( GL_DEPTH_TEST );
 636    glDepthMask( GL_TRUE );
 637 }
 638
 639 VG_STATIC void render_world_gates( world_instance *world, camera *cam,
 640                                    int layer_depth )
 641 {
 642    float closest = INFINITY;
 643    struct ent_gate *gate = NULL;
 644
 645    for( u32 i=0; i<mdl_arrcount(&world->ent_gate); i++ ){
 646       ent_gate *gi = mdl_arritm( &world->ent_gate, i );
 647
 648       if( !(gi->flags & k_ent_gate_linked) )
 649          continue;
 650
 651       float dist = v3_dist2( gi->co[0], cam->transform[3] );
 652
 653       vg_line_point( gi->co[0], 0.25f, VG__BLUE );
 654
 655       if( dist < closest ){
 656          closest = dist;
 657          gate = gi;
 658       }
 659    }
 660
 661    world->rendering_gate = gate;
 662    if( gate ){
 663       if( gate->flags & k_ent_gate_locked ) return;
 664
 665       if( gate->flags & k_ent_gate_nonlocal ){
 666          if( world_static.load_state != k_world_loader_none ){
 667             world->rendering_gate = NULL;
 668             return;
 669          }
 670
 671          world_instance *dest_world = &world_static.instances[ gate->target ];
 672          render_gate( world, dest_world, gate, cam, layer_depth );
 673       }
 674       else{
 675          render_gate( world, world, gate, cam, layer_depth );
 676       }
 677    }
 678 }
 679
 680 VG_STATIC void world_prerender( world_instance *world )
 681 {
 682
 683    if( mdl_arrcount( &world->ent_light ) ){
 684       f32 rate = vg_maxf(0.1f, fabsf(k_day_length)) * vg_signf(k_day_length);
 685       world->time += vg.time_delta * (1.0/(rate*60.0));
 686    }
 687    else{
 688       world->time = 0.834;
 689    }
 690
 691    struct ub_world_lighting *state = &world->ub_lighting;
 692
 693    state->g_time = world->time;
 694    state->g_realtime = vg.time;
 695    state->g_debug_indices = k_debug_light_indices;
 696    state->g_light_preview = k_light_preview;
 697    state->g_debug_complexity = k_debug_light_complexity;
 698    state->g_time_of_day = vg_fractf( world->time );
 699    state->g_day_phase   = cosf( state->g_time_of_day * VG_PIf * 2.0f );
 700    state->g_sunset_phase= cosf( state->g_time_of_day * VG_PIf * 4.0f + VG_PIf );
 701
 702    state->g_day_phase    =       state->g_day_phase    * 0.5f + 0.5f;
 703    state->g_sunset_phase = powf( state->g_sunset_phase * 0.5f + 0.5f, 6.0f );
 704
 705    float a = state->g_time_of_day * VG_PIf * 2.0f;
 706    state->g_sun_dir[0] = sinf( a );
 707    state->g_sun_dir[1] = cosf( a );
 708    state->g_sun_dir[2] = 0.2f;
 709    v3_normalize( state->g_sun_dir );
 710
 711    world->probabilities[ k_probability_curve_constant ] = 1.0f;
 712    float dp = state->g_day_phase;
 713
 714    world->probabilities[ k_probability_curve_wildlife_day ] =
 715       (dp*dp*0.8f+state->g_sunset_phase)*0.8f;
 716    world->probabilities[ k_probability_curve_wildlife_night ] =
 717       1.0f-powf(fabsf((state->g_time_of_day-0.5f)*5.0f),5.0f);
 718
 719    glBindBuffer( GL_UNIFORM_BUFFER, world->ubo_lighting );
 720    glBufferSubData( GL_UNIFORM_BUFFER, 0,
 721                     sizeof(struct ub_world_lighting), &world->ub_lighting );
 722 }
 723
 724 VG_STATIC void skateshop_render(void);
 725 VG_STATIC void render_world( world_instance *world, camera *cam,
 726                              int layer_depth )
 727 {
 728    render_sky( world, cam );
 729
 730    render_world_routes( world, cam, layer_depth );
 731    render_world_standard( world, cam );
 732    render_world_cubemapped( world, cam, layer_depth );
 733
 734    render_world_vb( world, cam );
 735    render_world_alphatest( world, cam );
 736    render_world_fxglow( world, cam, layer_depth );
 737    render_terrain( world, cam );
 738
 739    if( layer_depth == 0 ){
 740       skateshop_render();
 741
 742       /* Render SFD's */
 743       u32 closest = 0;
 744       float min_dist = INFINITY;
 745
 746       if( !mdl_arrcount( &world->ent_route ) )
 747          return;
 748
 749       for( u32 i=0; i<mdl_arrcount( &world->ent_route ); i++ ){
 750          ent_route *route = mdl_arritm( &world->ent_route, i );
 751          float dist = v3_dist2( route->board_transform[3], cam->pos );
 752
 753          if( dist < min_dist ){
 754             min_dist = dist;
 755             closest = i;
 756          }
 757       }
 758
 759       ent_route *route = mdl_arritm( &world->ent_route, closest );
 760       sfd_render( world, cam, route->board_transform );
 761    }
 762 }
 763
 764 VG_STATIC void render_cubemap_side( world_instance *world, ent_cubemap *cm,
 765                                     u32 side ){
 766    camera cam;
 767    glFramebufferTexture2D( GL_FRAMEBUFFER, GL_COLOR_ATTACHMENT0,
 768          GL_TEXTURE_CUBE_MAP_POSITIVE_X + side, cm->texture_id, 0 );
 769    glClear( GL_DEPTH_BUFFER_BIT );
 770
 771    v3f forward[6] = {
 772       { -1.0f,  0.0f,  0.0f },
 773       {  1.0f,  0.0f,  0.0f },
 774       {  0.0f, -1.0f,  0.0f },
 775       {  0.0f,  1.0f,  0.0f },
 776       {  0.0f,  0.0f, -1.0f },
 777       {  0.0f,  0.0f,  1.0f }
 778    };
 779    v3f up[6] = {
 780       { 0.0f, -1.0f,  0.0f },
 781       { 0.0f, -1.0f,  0.0f },
 782       { 0.0f,  0.0f,  1.0f },
 783       { 0.0f,  0.0f, -1.0f },
 784       { 0.0f, -1.0f,  0.0f },
 785       { 0.0f, -1.0f,  0.0f }
 786    };
 787
 788    v3_zero( cam.angles );
 789    v3_copy( cm->co, cam.pos );
 790
 791    v3_copy( forward[side], cam.transform[2] );
 792    v3_copy( up[side], cam.transform[1] );
 793    v3_cross( up[side], forward[side], cam.transform[0] );
 794    v3_copy( cm->co, cam.transform[3] );
 795    m4x3_invert_affine( cam.transform, cam.transform_inverse );
 796
 797    camera_update_view( &cam );
 798
 799    cam.nearz = 0.1f;
 800    cam.farz = 1000.0f;
 801    cam.fov = 90.0f;
 802    m4x4_copy( cam.mtx.p,  cam.mtx_prev.p );
 803    m4x4_projection( cam.mtx.p, cam.fov, 1.0f, cam.nearz, cam.farz );
 804    camera_finalize( &cam );
 805    camera_finalize( &cam );
 806
 807    render_world( world, &cam, -1 );
 808 }
 809
 810 VG_STATIC void render_world_cubemaps( world_instance *world ){
 811    if( world->cubemap_cooldown )
 812       world->cubemap_cooldown --;
 813    else{
 814       world->cubemap_cooldown = 60;
 815
 816       glViewport( 0, 0, WORLD_CUBEMAP_RES, WORLD_CUBEMAP_RES );
 817       for( u32 i=0; i<mdl_arrcount( &world->ent_cubemap ); i++ ){
 818          ent_cubemap *cm = mdl_arritm( &world->ent_cubemap, i );
 819          glBindFramebuffer( GL_FRAMEBUFFER, cm->framebuffer_id );
 820
 821          world->cubemap_side ++;
 822          if( world->cubemap_side >= 6 )
 823             world->cubemap_side = 0;
 824
 825          render_cubemap_side( world, cm, world->cubemap_side );
 826       }
 827    }
 828 }
 829
 830 VG_STATIC void render_world_depth( world_instance *world, camera *cam )
 831 {
 832    m4x3f identity_matrix;
 833    m4x3_identity( identity_matrix );
 834
 835    shader_scene_depth_use();
 836    shader_scene_depth_uCamera( cam->transform[3] );
 837    shader_scene_depth_uPv( cam->mtx.pv );
 838    shader_scene_depth_uPvmPrev( cam->mtx_prev.pv );
 839    shader_scene_depth_uMdl( identity_matrix );
 840    world_link_lighting_ub( world, _shader_scene_depth.id );
 841
 842    mesh_bind( &world->mesh_geo );
 843    mesh_draw( &world->mesh_geo );
 844 }
 845
 846 VG_STATIC void render_world_position( world_instance *world, camera *cam )
 847 {
 848    m4x3f identity_matrix;
 849    m4x3_identity( identity_matrix );
 850
 851    shader_scene_position_use();
 852    shader_scene_position_uCamera( cam->transform[3] );
 853    shader_scene_position_uPv( cam->mtx.pv );
 854    shader_scene_position_uPvmPrev( cam->mtx_prev.pv );
 855    shader_scene_position_uMdl( identity_matrix );
 856    world_link_lighting_ub( world, _shader_scene_position.id );
 857
 858    mesh_bind( &world->mesh_geo );
 859    mesh_draw( &world->mesh_geo );
 860 }
 861
 862 #endif