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
  11 static int ccmd_set_time( int argc, const char *argv[] ){
  12    if( argc == 1 ){
  13       world_instance *world = world_current_instance();
  14       world->time = atof( argv[0] );
  15    }
  16    else {
  17       vg_error( "Usage set_time <0-1.0>\n" );
  18    }
  19    return 0;
  20 }
  21
  22 VG_STATIC void async_world_render_init( void *payload, u32 size )
  23 {
  24    vg_info( "Allocate uniform buffers\n" );
  25    for( int i=0; i<4; i++ ){
  26       world_instance *world = &world_static.instances[i];
  27       world->ubo_bind_point = i;
  28
  29       glGenBuffers( 1, &world->ubo_lighting );
  30       glBindBuffer( GL_UNIFORM_BUFFER, world->ubo_lighting );
  31       glBufferData( GL_UNIFORM_BUFFER, sizeof(struct ub_world_lighting),
  32                     NULL, GL_DYNAMIC_DRAW );
  33
  34       glBindBufferBase( GL_UNIFORM_BUFFER, i, world->ubo_lighting );
  35       VG_CHECK_GL_ERR();
  36    }
  37
  38    vg_info( "Allocate frame buffers\n" );
  39    for( int i=0; i<4; i++ ){
  40       world_instance *world = &world_static.instances[i];
  41       struct framebuffer *fb = &world->heightmap;
  42
  43       fb->display_name = NULL;
  44       fb->link = NULL;
  45       fb->fixed_w = 1024;
  46       fb->fixed_h = 1024;
  47       fb->resolution_div = 0;
  48
  49       fb->attachments[0].display_name     = NULL;
  50       fb->attachments[0].purpose = k_framebuffer_attachment_type_texture;
  51       fb->attachments[0].internalformat   = GL_RG16F;
  52       fb->attachments[0].format           = GL_RG;
  53       fb->attachments[0].type             = GL_FLOAT;
  54       fb->attachments[0].attachment       = GL_COLOR_ATTACHMENT0;
  55
  56       fb->attachments[1].purpose = k_framebuffer_attachment_type_none;
  57       fb->attachments[2].purpose = k_framebuffer_attachment_type_none;
  58       fb->attachments[3].purpose = k_framebuffer_attachment_type_none;
  59       fb->attachments[4].purpose = k_framebuffer_attachment_type_none;
  60
  61       render_fb_allocate( fb );
  62    }
  63 }
  64
  65 VG_STATIC void world_render_init(void)
  66 {
  67    VG_VAR_F32( k_day_length );
  68    VG_VAR_I32( k_debug_light_indices );
  69    VG_VAR_I32( k_debug_light_complexity );
  70    VG_VAR_I32( k_light_preview );
  71    vg_console_reg_cmd( "set_time", ccmd_set_time, NULL );
  72
  73    world_render.sky_rate = 1.0;
  74    world_render.sky_target_rate = 1.0;
  75
  76    shader_scene_standard_register();
  77    shader_scene_standard_alphatest_register();
  78    shader_scene_cubemapped_register();
  79    shader_scene_fxglow_register();
  80    shader_scene_vertex_blend_register();
  81    shader_scene_terrain_register();
  82    shader_scene_depth_register();
  83    shader_scene_position_register();
  84    shader_model_sky_register();
  85
  86    vg_info( "Loading world resources\n" );
  87    vg_linear_clear( vg_mem.scratch );
  88
  89    mdl_context msky;
  90    mdl_open( &msky, "models/rs_skydome.mdl", vg_mem.scratch );
  91    mdl_load_metadata_block( &msky, vg_mem.scratch );
  92    mdl_async_load_glmesh( &msky, &world_render.skydome );
  93    mdl_close( &msky );
  94
  95    vg_info( "Loading default world textures\n" );
  96    vg_tex2d_load_qoi_async_file( "textures/garbage.qoi",
  97                                  VG_TEX2D_NEAREST|VG_TEX2D_REPEAT,
  98                                  &world_render.tex_terrain_noise );
  99
 100    vg_async_call( async_world_render_init, NULL, 0 );
 101 }
 102
 103 VG_STATIC void world_link_lighting_ub( world_instance *world, GLuint shader )
 104 {
 105    GLuint idx = glGetUniformBlockIndex( shader, "ub_world_lighting" );
 106    glUniformBlockBinding( shader, idx, world->ubo_bind_point );
 107 }
 108
 109 VG_STATIC void world_bind_position_texture( world_instance *world,
 110                                             GLuint shader, GLuint location,
 111                                             int slot )
 112 {
 113    render_fb_bind_texture( &world->heightmap, 0, slot );
 114    glUniform1i( location, slot );
 115 }
 116
 117 VG_STATIC void world_bind_light_array( world_instance *world,
 118                                        GLuint shader, GLuint location,
 119                                        int slot )
 120 {
 121    glActiveTexture( GL_TEXTURE0 + slot );
 122    glBindTexture( GL_TEXTURE_BUFFER, world->tex_light_entities );
 123    glUniform1i( location, slot );
 124 }
 125
 126 VG_STATIC void world_bind_light_index( world_instance *world,
 127                                        GLuint shader, GLuint location,
 128                                        int slot )
 129 {
 130    glActiveTexture( GL_TEXTURE0 + slot );
 131    glBindTexture( GL_TEXTURE_3D, world->tex_light_cubes );
 132    glUniform1i( location, slot );
 133 }
 134
 135 VG_STATIC void render_world_depth( world_instance *world, camera *cam );
 136
 137 /*
 138  * Rendering
 139  */
 140
 141 VG_STATIC void bind_terrain_noise(void)
 142 {
 143    glActiveTexture( GL_TEXTURE0 );
 144    glBindTexture( GL_TEXTURE_2D, world_render.tex_terrain_noise );
 145 }
 146
 147 struct world_pass{
 148    camera *cam;
 149    enum mdl_shader shader;
 150    enum world_geo_type geo_type;
 151
 152    void (*fn_bind_textures)( world_instance *world,
 153                              struct world_surface *mat );
 154    void (*fn_set_mdl)( m4x3f mdl );
 155    void (*fn_set_uPvmPrev)( m4x4f pvm );
 156 };
 157
 158 VG_STATIC
 159 void world_render_traffic( world_instance *world, u32 material_id,
 160                            struct world_pass *pass ){
 161    if( !mdl_arrcount( &world->ent_traffic ) ) return;
 162
 163    /* HACK: use the first material for every traffic entity */
 164    ent_traffic *first = mdl_arritm( &world->ent_traffic, 0 );
 165    if( !first->submesh_count ) return;
 166
 167    mdl_submesh *sm = mdl_arritm( &world->meta.submeshs, first->submesh_start );
 168    if( sm->material_id != material_id ) return;
 169
 170    struct world_surface *mat = &world->surfaces[ material_id ];
 171    pass->fn_bind_textures( world, mat );
 172
 173    for( u32 j=0; j<mdl_arrcount( &world->ent_traffic ); j++ ){
 174       ent_traffic *traffic = mdl_arritm( &world->ent_traffic, j );
 175
 176       for( u32 k=0; k<traffic->submesh_count; k++ ){
 177          sm = mdl_arritm( &world->meta.submeshs,
 178                            traffic->submesh_start+k );
 179
 180          m4x3f mmdl;
 181          q_m3x3( traffic->transform.q, mmdl );
 182          v3_copy( traffic->transform.co, mmdl[3] );
 183
 184          m4x4f m4mdl;
 185          m4x3_expand( mmdl, m4mdl );
 186          m4x4_mul( pass->cam->mtx_prev.pv, m4mdl, m4mdl );
 187
 188          pass->fn_set_mdl( mmdl );
 189          pass->fn_set_uPvmPrev( m4mdl );
 190
 191          mdl_draw_submesh( sm );
 192       }
 193    }
 194 }
 195
 196 VG_STATIC
 197 void world_render_pass( world_instance *world, struct world_pass *pass ){
 198    for( int i=0; i<world->surface_count; i++ ){
 199       struct world_surface *mat = &world->surfaces[i];
 200
 201       if( mat->info.shader == pass->shader ){
 202          mdl_submesh *sm;
 203
 204          if( pass->geo_type == k_world_geo_type_solid ){
 205             sm = &mat->sm_geo;
 206          }
 207          else{
 208             world_render_traffic( world, i, pass );
 209             sm = &mat->sm_no_collide;
 210          }
 211
 212          if( !sm->indice_count )
 213             continue;
 214
 215          m4x3f mmdl;
 216          m4x3_identity( mmdl );
 217          pass->fn_set_mdl( mmdl );
 218          pass->fn_set_uPvmPrev( pass->cam->mtx_prev.pv );
 219
 220          pass->fn_bind_textures( world, mat );
 221          mdl_draw_submesh( sm );
 222       }
 223    }
 224 }
 225
 226 VG_STATIC
 227 void world_render_both_stages( world_instance *world, struct world_pass *pass )
 228 {
 229    mesh_bind( &world->mesh_geo );
 230    pass->geo_type = k_world_geo_type_solid;
 231    world_render_pass( world, pass );
 232
 233    glDisable( GL_CULL_FACE );
 234    mesh_bind( &world->mesh_no_collide );
 235    pass->geo_type = k_world_geo_type_nonsolid;
 236    world_render_pass( world, pass );
 237    glEnable( GL_CULL_FACE );
 238 }
 239
 240 VG_STATIC void bindpoint_diffuse_texture1( world_instance *world,
 241                                            struct world_surface *mat )
 242
 243 {
 244    glActiveTexture( GL_TEXTURE1 );
 245    glBindTexture( GL_TEXTURE_2D, world->textures[ mat->info.tex_diffuse ] );
 246 }
 247
 248 VG_STATIC void bindpoint_diffuse1_and_cubemap10( world_instance *world,
 249                                                  struct world_surface *mat ){
 250    glActiveTexture( GL_TEXTURE1 );
 251    glBindTexture( GL_TEXTURE_2D, world->textures[ mat->info.tex_diffuse ] );
 252
 253    u32 cubemap_id = mat->info.tex_none0,
 254        cubemap_index = 0;
 255
 256    if( mdl_entity_id_type( cubemap_id ) == k_ent_cubemap ){
 257       cubemap_index = mdl_entity_id_id( cubemap_id );
 258    }
 259
 260    ent_cubemap *cm = mdl_arritm( &world->ent_cubemap, cubemap_index );
 261    glActiveTexture( GL_TEXTURE10 );
 262    glBindTexture( GL_TEXTURE_CUBE_MAP, cm->texture_id );
 263
 264    shader_scene_cubemapped_uColour( mat->info.colour );
 265 }
 266
 267 VG_STATIC void render_world_vb( world_instance *world, camera *cam )
 268 {
 269    shader_scene_vertex_blend_use();
 270    shader_scene_vertex_blend_uTexGarbage(0);
 271    shader_scene_vertex_blend_uTexGradients(1);
 272    world_link_lighting_ub( world, _shader_scene_vertex_blend.id );
 273    world_bind_position_texture( world, _shader_scene_vertex_blend.id,
 274                                 _uniform_scene_vertex_blend_g_world_depth, 2 );
 275    world_bind_light_array( world, _shader_scene_vertex_blend.id,
 276                                 _uniform_scene_vertex_blend_uLightsArray, 3 );
 277    world_bind_light_index( world, _shader_scene_vertex_blend.id,
 278                                 _uniform_scene_vertex_blend_uLightsIndex, 4 );
 279
 280    glActiveTexture( GL_TEXTURE0 );
 281    glBindTexture( GL_TEXTURE_2D, world_render.tex_terrain_noise );
 282
 283    shader_scene_vertex_blend_uPv( cam->mtx.pv );
 284    shader_scene_vertex_blend_uCamera( cam->transform[3] );
 285
 286    struct world_pass pass = {
 287       .shader = k_shader_standard_vertex_blend,
 288       .cam = cam,
 289       .fn_bind_textures = bindpoint_diffuse_texture1,
 290       .fn_set_mdl = shader_scene_vertex_blend_uMdl,
 291       .fn_set_uPvmPrev = shader_scene_vertex_blend_uPvmPrev,
 292    };
 293
 294    world_render_both_stages( world, &pass );
 295 }
 296
 297 VG_STATIC void world_shader_standard_bind( world_instance *world, camera *cam ){
 298    shader_scene_standard_use();
 299    shader_scene_standard_uTexGarbage(0);
 300    shader_scene_standard_uTexMain(1);
 301    shader_scene_standard_uPv( cam->mtx.pv );
 302
 303    world_link_lighting_ub( world, _shader_scene_standard.id );
 304    world_bind_position_texture( world, _shader_scene_standard.id,
 305                                 _uniform_scene_standard_g_world_depth, 2 );
 306    world_bind_light_array( world, _shader_scene_standard.id,
 307                                 _uniform_scene_standard_uLightsArray, 3 );
 308    world_bind_light_index( world, _shader_scene_standard.id,
 309                                 _uniform_scene_standard_uLightsIndex, 4 );
 310
 311    bind_terrain_noise();
 312    shader_scene_standard_uCamera( cam->transform[3] );
 313 }
 314
 315 VG_STATIC void render_world_standard( world_instance *world, camera *cam ){
 316    world_shader_standard_bind( world, cam );
 317    struct world_pass pass = {
 318       .shader = k_shader_standard,
 319       .cam = cam,
 320       .fn_bind_textures = bindpoint_diffuse_texture1,
 321       .fn_set_mdl = shader_scene_standard_uMdl,
 322       .fn_set_uPvmPrev = shader_scene_standard_uPvmPrev,
 323    };
 324
 325    world_render_both_stages( world, &pass );
 326 }
 327
 328 VG_STATIC void render_world_cubemapped( world_instance *world, camera *cam,
 329                                         int layer_depth ){
 330    if( !mdl_arrcount( &world->ent_cubemap ) )
 331       return;
 332
 333    if( layer_depth == -1 ){
 334       world_shader_standard_bind( world, cam );
 335
 336       struct world_pass pass = {
 337          .shader = k_shader_cubemap,
 338          .cam = cam,
 339          .fn_bind_textures = bindpoint_diffuse_texture1,
 340          .fn_set_mdl = shader_scene_standard_uMdl,
 341          .fn_set_uPvmPrev = shader_scene_standard_uPvmPrev,
 342       };
 343
 344       world_render_both_stages( world, &pass );
 345    }
 346    else {
 347       shader_scene_cubemapped_use();
 348       shader_scene_cubemapped_uTexGarbage(0);
 349       shader_scene_cubemapped_uTexMain(1);
 350       shader_scene_cubemapped_uTexCubemap(10);
 351       shader_scene_cubemapped_uPv( cam->mtx.pv );
 352
 353       world_link_lighting_ub( world, _shader_scene_cubemapped.id );
 354       world_bind_position_texture( world, _shader_scene_cubemapped.id,
 355                                    _uniform_scene_cubemapped_g_world_depth, 2 );
 356       world_bind_light_array( world, _shader_scene_cubemapped.id,
 357                                    _uniform_scene_cubemapped_uLightsArray, 3 );
 358       world_bind_light_index( world, _shader_scene_cubemapped.id,
 359                                    _uniform_scene_cubemapped_uLightsIndex, 4 );
 360
 361       bind_terrain_noise();
 362       shader_scene_cubemapped_uCamera( cam->transform[3] );
 363
 364       struct world_pass pass = {
 365          .shader = k_shader_cubemap,
 366          .cam = cam,
 367          .fn_bind_textures = bindpoint_diffuse1_and_cubemap10,
 368          .fn_set_mdl = shader_scene_cubemapped_uMdl,
 369          .fn_set_uPvmPrev = shader_scene_cubemapped_uPvmPrev,
 370       };
 371
 372       world_render_both_stages( world, &pass );
 373    }
 374 }
 375
 376 VG_STATIC void render_world_alphatest( world_instance *world, camera *cam ){
 377    shader_scene_standard_alphatest_use();
 378    shader_scene_standard_alphatest_uTexGarbage(0);
 379    shader_scene_standard_alphatest_uTexMain(1);
 380    shader_scene_standard_alphatest_uPv( cam->mtx.pv );
 381
 382    world_link_lighting_ub( world, _shader_scene_standard_alphatest.id );
 383    world_bind_position_texture( world, _shader_scene_standard_alphatest.id,
 384                         _uniform_scene_standard_alphatest_g_world_depth, 2 );
 385    world_bind_light_array( world, _shader_scene_standard_alphatest.id,
 386                         _uniform_scene_standard_alphatest_uLightsArray, 3 );
 387    world_bind_light_index( world, _shader_scene_standard_alphatest.id,
 388                            _uniform_scene_standard_alphatest_uLightsIndex, 4 );
 389
 390
 391    bind_terrain_noise();
 392
 393
 394    shader_scene_standard_alphatest_uCamera( cam->transform[3] );
 395
 396    glDisable(GL_CULL_FACE);
 397
 398    struct world_pass pass = {
 399       .shader = k_shader_standard_cutout,
 400       .cam = cam,
 401       .fn_bind_textures = bindpoint_diffuse_texture1,
 402       .fn_set_mdl = shader_scene_standard_alphatest_uMdl,
 403       .fn_set_uPvmPrev = shader_scene_standard_alphatest_uPvmPrev,
 404    };
 405
 406    world_render_both_stages( world, &pass );
 407
 408    glEnable(GL_CULL_FACE);
 409 }
 410
 411 VG_STATIC
 412 void world_render_challenges( world_instance *world, struct world_pass *pass,
 413                               v3f pos ){
 414    if( !world ) return;
 415
 416    glDisable( GL_CULL_FACE );
 417    mesh_bind( &world->mesh_no_collide );
 418
 419    u32 last_material = 0;
 420
 421    const f32 radius = 40.0f;
 422
 423    bh_iter it;
 424    bh_iter_init_range( 0, &it, pos, radius );
 425    i32 idx;
 426
 427    while( bh_next( world->entity_bh, &it, &idx ) ){
 428       u32 id    = world->entity_list[ idx ],
 429           type  = mdl_entity_id_type( id ),
 430           index = mdl_entity_id_id( id );
 431
 432       if( type != k_ent_challenge ) continue;
 433
 434       ent_challenge *challenge = mdl_arritm(&world->ent_challenge,index);
 435
 436       f32 dist = v3_dist( challenge->transform.co, pos ) * (1.0f/radius),
 437           scale = vg_smoothstepf( vg_clampf( 10.0f-dist*10.0f, 0.0f,1.0f ) );
 438
 439       v3_fill( challenge->transform.s, scale );
 440
 441       m4x3f mmdl;
 442       mdl_transform_m4x3( &challenge->transform, mmdl );
 443       shader_scene_fxglow_uMdl( mmdl );
 444
 445       for( u32 j=0; j<challenge->submesh_count; j++ ){
 446          mdl_submesh *sm = mdl_arritm( &world->meta.submeshs,
 447                                        challenge->submesh_start + j );
 448
 449          if( sm->material_id != last_material ){
 450             last_material = sm->material_id;
 451
 452             pass->fn_bind_textures( world, &world->surfaces[sm->material_id] );
 453          }
 454
 455          mdl_draw_submesh( sm );
 456       }
 457    }
 458 }
 459
 460 VG_STATIC void render_world_fxglow( world_instance *world, camera *cam ){
 461    //glDrawBuffers( 1, (GLenum[]){ GL_COLOR_ATTACHMENT0 } );
 462
 463    shader_scene_fxglow_use();
 464    shader_scene_fxglow_uTexMain(1);
 465    shader_scene_fxglow_uPv( cam->mtx.pv );
 466
 467    world_link_lighting_ub( world, _shader_scene_fxglow.id );
 468    world_bind_position_texture( world, _shader_scene_fxglow.id,
 469                         _uniform_scene_fxglow_g_world_depth, 2 );
 470    world_bind_light_array( world, _shader_scene_fxglow.id,
 471                         _uniform_scene_fxglow_uLightsArray, 3 );
 472    world_bind_light_index( world, _shader_scene_fxglow.id,
 473                            _uniform_scene_fxglow_uLightsIndex, 4 );
 474
 475    shader_scene_fxglow_uCamera( cam->transform[3] );
 476    glDisable(GL_CULL_FACE);
 477
 478    struct world_pass pass = {
 479       .shader = k_shader_fxglow,
 480       .cam = cam,
 481       .fn_bind_textures = bindpoint_diffuse_texture1,
 482       .fn_set_mdl = shader_scene_fxglow_uMdl,
 483       .fn_set_uPvmPrev = shader_scene_fxglow_uPvmPrev,
 484    };
 485
 486    world_render_both_stages( world, &pass );
 487    world_render_challenges( world, &pass, cam->pos );
 488
 489    glEnable(GL_CULL_FACE);
 490    //glDrawBuffers( 2, (GLenum[]){ GL_COLOR_ATTACHMENT0, GL_COLOR_ATTACHMENT1 } );
 491 }
 492
 493 VG_STATIC void bindpoint_terrain( world_instance *world,
 494                                   struct world_surface *mat )
 495 {
 496    glActiveTexture( GL_TEXTURE1 );
 497    glBindTexture( GL_TEXTURE_2D, world->textures[ mat->info.tex_diffuse ] );
 498
 499    shader_scene_terrain_uSandColour( mat->info.colour );
 500    shader_scene_terrain_uBlendOffset( mat->info.colour1 );
 501 }
 502
 503 VG_STATIC void render_terrain( world_instance *world, camera *cam )
 504 {
 505    shader_scene_terrain_use();
 506    shader_scene_terrain_uTexGarbage(0);
 507    shader_scene_terrain_uTexGradients(1);
 508
 509    world_link_lighting_ub( world, _shader_scene_terrain.id );
 510    world_bind_position_texture( world, _shader_scene_terrain.id,
 511                         _uniform_scene_terrain_g_world_depth, 2 );
 512    world_bind_light_array( world, _shader_scene_terrain.id,
 513                         _uniform_scene_terrain_uLightsArray, 3 );
 514    world_bind_light_index( world, _shader_scene_terrain.id,
 515                            _uniform_scene_terrain_uLightsIndex, 4 );
 516
 517    glActiveTexture( GL_TEXTURE0 );
 518    glBindTexture( GL_TEXTURE_2D, world_render.tex_terrain_noise );
 519
 520    shader_scene_terrain_uPv( cam->mtx.pv );
 521    shader_scene_terrain_uCamera( cam->transform[3] );
 522
 523    struct world_pass pass = {
 524       .shader = k_shader_terrain_blend,
 525       .cam = cam,
 526       .fn_bind_textures = bindpoint_terrain,
 527       .fn_set_mdl = shader_scene_terrain_uMdl,
 528       .fn_set_uPvmPrev = shader_scene_terrain_uPvmPrev,
 529    };
 530
 531    world_render_both_stages( world, &pass );
 532 }
 533
 534 VG_STATIC void render_sky( world_instance *world, camera *cam )
 535 {
 536    /*
 537     * Modify matrix to remove clipping and view translation
 538     */
 539    m4x4f v,
 540          v_prev,
 541          pv,
 542          pv_prev;
 543
 544    m4x4_copy( cam->mtx.v, v );
 545    m4x4_copy( cam->mtx_prev.v, v_prev );
 546    v3_zero( v[3] );
 547    v3_zero( v_prev[3] );
 548
 549    m4x4_copy( cam->mtx.p,      pv );
 550    m4x4_copy( cam->mtx_prev.p, pv_prev );
 551    m4x4_reset_clipping( pv,      cam->farz, cam->nearz );
 552    m4x4_reset_clipping( pv_prev, cam->farz, cam->nearz );
 553
 554    m4x4_mul( pv,      v,      pv );
 555    m4x4_mul( pv_prev, v_prev, pv_prev );
 556
 557    m4x3f identity_matrix;
 558    m4x3_identity( identity_matrix );
 559
 560    /*
 561     * Draw
 562     */
 563    shader_model_sky_use();
 564    shader_model_sky_uMdl( identity_matrix );
 565    shader_model_sky_uPv( pv );
 566    shader_model_sky_uPvmPrev( pv_prev );
 567    shader_model_sky_uTexGarbage(0);
 568    world_link_lighting_ub( world, _shader_model_sky.id );
 569
 570    glActiveTexture( GL_TEXTURE0 );
 571    glBindTexture( GL_TEXTURE_2D, world_render.tex_terrain_noise );
 572
 573    glDepthMask( GL_FALSE );
 574    glDisable( GL_DEPTH_TEST );
 575
 576    mesh_bind( &world_render.skydome );
 577    mesh_draw( &world_render.skydome );
 578
 579    glEnable( GL_DEPTH_TEST );
 580    glDepthMask( GL_TRUE );
 581 }
 582
 583 VG_STATIC void render_world_gates( world_instance *world, camera *cam,
 584                                    int layer_depth )
 585 {
 586    float closest = INFINITY;
 587    struct ent_gate *gate = NULL;
 588
 589    for( u32 i=0; i<mdl_arrcount(&world->ent_gate); i++ ){
 590       ent_gate *gi = mdl_arritm( &world->ent_gate, i );
 591
 592       if( !(gi->flags & k_ent_gate_linked) )
 593          continue;
 594
 595       float dist = v3_dist2( gi->co[0], cam->transform[3] );
 596
 597       vg_line_point( gi->co[0], 0.25f, VG__BLUE );
 598
 599       if( dist < closest ){
 600          closest = dist;
 601          gate = gi;
 602       }
 603    }
 604
 605    world->rendering_gate = gate;
 606    if( gate ){
 607       if( gate->flags & k_ent_gate_locked ) return;
 608
 609       if( gate->flags & k_ent_gate_nonlocal ){
 610          if( world_static.load_state != k_world_loader_none ){
 611             world->rendering_gate = NULL;
 612             return;
 613          }
 614
 615          world_instance *dest_world = &world_static.instances[ gate->target ];
 616          render_gate( world, dest_world, gate, cam, layer_depth );
 617       }
 618       else{
 619          render_gate( world, world, gate, cam, layer_depth );
 620       }
 621    }
 622 }
 623
 624 VG_STATIC void world_prerender( world_instance *world )
 625 {
 626
 627    if( mdl_arrcount( &world->ent_light ) ){
 628       f32 rate = vg_maxf(0.1f, fabsf(k_day_length)) * vg_signf(k_day_length);
 629       world->time += vg.time_delta * (1.0/(rate*60.0));
 630    }
 631    else{
 632       world->time = 0.834;
 633    }
 634
 635    struct ub_world_lighting *state = &world->ub_lighting;
 636
 637    state->g_time = world->time;
 638    state->g_realtime = vg.time;
 639    state->g_debug_indices = k_debug_light_indices;
 640    state->g_light_preview = k_light_preview;
 641    state->g_debug_complexity = k_debug_light_complexity;
 642    state->g_time_of_day = vg_fractf( world->time );
 643    state->g_day_phase   = cosf( state->g_time_of_day * VG_PIf * 2.0f );
 644    state->g_sunset_phase= cosf( state->g_time_of_day * VG_PIf * 4.0f + VG_PIf );
 645
 646    state->g_day_phase    =       state->g_day_phase    * 0.5f + 0.5f;
 647    state->g_sunset_phase = powf( state->g_sunset_phase * 0.5f + 0.5f, 6.0f );
 648
 649    float a = state->g_time_of_day * VG_PIf * 2.0f;
 650    state->g_sun_dir[0] = sinf( a );
 651    state->g_sun_dir[1] = cosf( a );
 652    state->g_sun_dir[2] = 0.2f;
 653    v3_normalize( state->g_sun_dir );
 654
 655    world->probabilities[ k_probability_curve_constant ] = 1.0f;
 656    float dp = state->g_day_phase;
 657
 658    world->probabilities[ k_probability_curve_wildlife_day ] =
 659       (dp*dp*0.8f+state->g_sunset_phase)*0.8f;
 660    world->probabilities[ k_probability_curve_wildlife_night ] =
 661       1.0f-powf(fabsf((state->g_time_of_day-0.5f)*5.0f),5.0f);
 662
 663    glBindBuffer( GL_UNIFORM_BUFFER, world->ubo_lighting );
 664    glBufferSubData( GL_UNIFORM_BUFFER, 0,
 665                     sizeof(struct ub_world_lighting), &world->ub_lighting );
 666 }
 667
 668 VG_STATIC void skateshop_render(void);
 669 VG_STATIC void render_world( world_instance *world, camera *cam,
 670                              int layer_depth )
 671 {
 672    render_sky( world, cam );
 673
 674    render_world_routes( world, cam, layer_depth );
 675    render_world_standard( world, cam );
 676    render_world_cubemapped( world, cam, layer_depth );
 677
 678    render_world_vb( world, cam );
 679    render_world_alphatest( world, cam );
 680    render_world_fxglow( world, cam );
 681    render_terrain( world, cam );
 682
 683    if( layer_depth == 0 ){
 684       skateshop_render();
 685
 686       /* Render SFD's */
 687       u32 closest = 0;
 688       float min_dist = INFINITY;
 689
 690       if( !mdl_arrcount( &world->ent_route ) )
 691          return;
 692
 693       for( u32 i=0; i<mdl_arrcount( &world->ent_route ); i++ ){
 694          ent_route *route = mdl_arritm( &world->ent_route, i );
 695          float dist = v3_dist2( route->board_transform[3], cam->pos );
 696
 697          if( dist < min_dist ){
 698             min_dist = dist;
 699             closest = i;
 700          }
 701       }
 702
 703       ent_route *route = mdl_arritm( &world->ent_route, closest );
 704       sfd_render( world, cam, route->board_transform );
 705    }
 706 }
 707
 708 VG_STATIC void render_cubemap_side( world_instance *world, ent_cubemap *cm,
 709                                     u32 side ){
 710    camera cam;
 711    glFramebufferTexture2D( GL_FRAMEBUFFER, GL_COLOR_ATTACHMENT0,
 712          GL_TEXTURE_CUBE_MAP_POSITIVE_X + side, cm->texture_id, 0 );
 713    glClear( GL_DEPTH_BUFFER_BIT );
 714
 715    v3f forward[6] = {
 716       { -1.0f,  0.0f,  0.0f },
 717       {  1.0f,  0.0f,  0.0f },
 718       {  0.0f, -1.0f,  0.0f },
 719       {  0.0f,  1.0f,  0.0f },
 720       {  0.0f,  0.0f, -1.0f },
 721       {  0.0f,  0.0f,  1.0f }
 722    };
 723    v3f up[6] = {
 724       { 0.0f, -1.0f,  0.0f },
 725       { 0.0f, -1.0f,  0.0f },
 726       { 0.0f,  0.0f,  1.0f },
 727       { 0.0f,  0.0f, -1.0f },
 728       { 0.0f, -1.0f,  0.0f },
 729       { 0.0f, -1.0f,  0.0f }
 730    };
 731
 732    v3_zero( cam.angles );
 733    v3_copy( cm->co, cam.pos );
 734
 735    v3_copy( forward[side], cam.transform[2] );
 736    v3_copy( up[side], cam.transform[1] );
 737    v3_cross( up[side], forward[side], cam.transform[0] );
 738    v3_copy( cm->co, cam.transform[3] );
 739    m4x3_invert_affine( cam.transform, cam.transform_inverse );
 740
 741    camera_update_view( &cam );
 742
 743    cam.nearz = 0.1f;
 744    cam.farz = 1000.0f;
 745    cam.fov = 90.0f;
 746    m4x4_copy( cam.mtx.p,  cam.mtx_prev.p );
 747    m4x4_projection( cam.mtx.p, cam.fov, 1.0f, cam.nearz, cam.farz );
 748    camera_finalize( &cam );
 749    camera_finalize( &cam );
 750
 751    render_world( world, &cam, -1 );
 752 }
 753
 754 VG_STATIC void render_world_cubemaps( world_instance *world ){
 755    if( world->cubemap_cooldown )
 756       world->cubemap_cooldown --;
 757    else{
 758       world->cubemap_cooldown = 60;
 759
 760       glViewport( 0, 0, WORLD_CUBEMAP_RES, WORLD_CUBEMAP_RES );
 761       for( u32 i=0; i<mdl_arrcount( &world->ent_cubemap ); i++ ){
 762          ent_cubemap *cm = mdl_arritm( &world->ent_cubemap, i );
 763          glBindFramebuffer( GL_FRAMEBUFFER, cm->framebuffer_id );
 764
 765          world->cubemap_side ++;
 766          if( world->cubemap_side >= 6 )
 767             world->cubemap_side = 0;
 768
 769          render_cubemap_side( world, cm, world->cubemap_side );
 770       }
 771    }
 772 }
 773
 774 VG_STATIC void render_world_depth( world_instance *world, camera *cam )
 775 {
 776    m4x3f identity_matrix;
 777    m4x3_identity( identity_matrix );
 778
 779    shader_scene_depth_use();
 780    shader_scene_depth_uCamera( cam->transform[3] );
 781    shader_scene_depth_uPv( cam->mtx.pv );
 782    shader_scene_depth_uPvmPrev( cam->mtx_prev.pv );
 783    shader_scene_depth_uMdl( identity_matrix );
 784    world_link_lighting_ub( world, _shader_scene_depth.id );
 785
 786    mesh_bind( &world->mesh_geo );
 787    mesh_draw( &world->mesh_geo );
 788 }
 789
 790 VG_STATIC void render_world_position( world_instance *world, camera *cam )
 791 {
 792    m4x3f identity_matrix;
 793    m4x3_identity( identity_matrix );
 794
 795    shader_scene_position_use();
 796    shader_scene_position_uCamera( cam->transform[3] );
 797    shader_scene_position_uPv( cam->mtx.pv );
 798    shader_scene_position_uPvmPrev( cam->mtx_prev.pv );
 799    shader_scene_position_uMdl( identity_matrix );
 800    world_link_lighting_ub( world, _shader_scene_position.id );
 801
 802    mesh_bind( &world->mesh_geo );
 803    mesh_draw( &world->mesh_geo );
 804 }
 805
 806 #endif