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 #include "respawn.h"
  13
  14 static int ccmd_set_time( int argc, const char *argv[] ){
  15    if( argc == 1 ){
  16       world_instance *world = world_current_instance();
  17       world->time = atof( argv[0] );
  18    }
  19    else {
  20       vg_error( "Usage set_time <0-1.0>\n" );
  21    }
  22    return 0;
  23 }
  24
  25 static void async_world_render_init( void *payload, u32 size )
  26 {
  27    vg_info( "Allocate uniform buffers\n" );
  28    for( int i=0; i<k_world_max; i++ ){
  29       world_instance *world = &world_static.instances[i];
  30       world->ubo_bind_point = i;
  31
  32       glGenBuffers( 1, &world->ubo_lighting );
  33       glBindBuffer( GL_UNIFORM_BUFFER, world->ubo_lighting );
  34       glBufferData( GL_UNIFORM_BUFFER, sizeof(struct ub_world_lighting),
  35                     NULL, GL_DYNAMIC_DRAW );
  36
  37       glBindBufferBase( GL_UNIFORM_BUFFER, i, world->ubo_lighting );
  38       VG_CHECK_GL_ERR();
  39    }
  40
  41    vg_info( "Allocate frame buffers\n" );
  42    for( int i=0; i<k_world_max; i++ ){
  43       world_instance *world = &world_static.instances[i];
  44       struct framebuffer *fb = &world->heightmap;
  45
  46       fb->display_name = NULL;
  47       fb->link = NULL;
  48       fb->fixed_w = 1024;
  49       fb->fixed_h = 1024;
  50       fb->resolution_div = 0;
  51
  52       fb->attachments[0].display_name     = NULL;
  53       fb->attachments[0].purpose = k_framebuffer_attachment_type_texture;
  54       fb->attachments[0].internalformat   = GL_RG16F;
  55       fb->attachments[0].format           = GL_RG;
  56       fb->attachments[0].type             = GL_FLOAT;
  57       fb->attachments[0].attachment       = GL_COLOR_ATTACHMENT0;
  58
  59       fb->attachments[1].purpose = k_framebuffer_attachment_type_none;
  60       fb->attachments[2].purpose = k_framebuffer_attachment_type_none;
  61       fb->attachments[3].purpose = k_framebuffer_attachment_type_none;
  62       fb->attachments[4].purpose = k_framebuffer_attachment_type_none;
  63
  64       render_fb_allocate( fb );
  65    }
  66 }
  67
  68 static void world_render_init(void)
  69 {
  70    VG_VAR_F32( k_day_length );
  71    VG_VAR_I32( k_debug_light_indices );
  72    VG_VAR_I32( k_debug_light_complexity );
  73    VG_VAR_I32( k_light_preview );
  74    vg_console_reg_cmd( "set_time", ccmd_set_time, NULL );
  75
  76    world_render.sky_rate = 1.0;
  77    world_render.sky_target_rate = 1.0;
  78
  79    shader_scene_standard_register();
  80    shader_scene_standard_alphatest_register();
  81    shader_scene_override_register();
  82    shader_scene_cubemapped_register();
  83    shader_scene_fxglow_register();
  84    shader_scene_vertex_blend_register();
  85    shader_scene_terrain_register();
  86    shader_scene_depth_register();
  87    shader_scene_position_register();
  88    shader_model_sky_register();
  89
  90    vg_info( "Loading world resources\n" );
  91    vg_linear_clear( vg_mem.scratch );
  92
  93    mdl_context msky;
  94    mdl_open( &msky, "models/rs_skydome.mdl", vg_mem.scratch );
  95    mdl_load_metadata_block( &msky, vg_mem.scratch );
  96    mdl_async_load_glmesh( &msky, &world_render.skydome );
  97    mdl_close( &msky );
  98
  99    vg_info( "Loading default world textures\n" );
 100    vg_tex2d_load_qoi_async_file( "textures/garbage.qoi",
 101                                  VG_TEX2D_NEAREST|VG_TEX2D_REPEAT,
 102                                  &world_render.tex_terrain_noise );
 103
 104    vg_async_call( async_world_render_init, NULL, 0 );
 105 }
 106
 107 static void world_link_lighting_ub( world_instance *world, GLuint shader ){
 108    GLuint idx = glGetUniformBlockIndex( shader, "ub_world_lighting" );
 109    glUniformBlockBinding( shader, idx, world->ubo_bind_point );
 110 }
 111
 112 static void world_bind_position_texture( world_instance *world,
 113                                             GLuint shader, GLuint location,
 114                                             int slot ){
 115    render_fb_bind_texture( &world->heightmap, 0, slot );
 116    glUniform1i( location, slot );
 117 }
 118
 119 static void world_bind_light_array( world_instance *world,
 120                                        GLuint shader, GLuint location,
 121                                        int slot ){
 122    glActiveTexture( GL_TEXTURE0 + slot );
 123    glBindTexture( GL_TEXTURE_BUFFER, world->tex_light_entities );
 124    glUniform1i( location, slot );
 125 }
 126
 127 static void world_bind_light_index( world_instance *world,
 128                                        GLuint shader, GLuint location,
 129                                        int slot ){
 130    glActiveTexture( GL_TEXTURE0 + slot );
 131    glBindTexture( GL_TEXTURE_3D, world->tex_light_cubes );
 132    glUniform1i( location, slot );
 133 }
 134
 135 static void render_world_depth( world_instance *world, camera *cam );
 136
 137 /*
 138  * Rendering
 139  */
 140
 141 static void bind_terrain_noise(void){
 142    glActiveTexture( GL_TEXTURE0 );
 143    glBindTexture( GL_TEXTURE_2D, world_render.tex_terrain_noise );
 144 }
 145
 146 struct world_pass{
 147    camera *cam;
 148    enum mdl_shader shader;
 149    enum world_geo_type geo_type;
 150
 151    void (*fn_bind_textures)( world_instance *world,
 152                              struct world_surface *mat );
 153    void (*fn_set_mdl)( m4x3f mdl );
 154    void (*fn_set_uPvmPrev)( m4x4f pvm );
 155 };
 156
 157 static
 158 void world_render_traffic( world_instance *world, u32 material_id,
 159                            struct world_pass *pass ){
 160    if( !mdl_arrcount( &world->ent_traffic ) ) return;
 161
 162    /* HACK: use the first material for every traffic entity */
 163    ent_traffic *first = mdl_arritm( &world->ent_traffic, 0 );
 164    if( !first->submesh_count ) return;
 165
 166    mdl_submesh *sm = mdl_arritm( &world->meta.submeshs, first->submesh_start );
 167    if( sm->material_id != material_id ) return;
 168
 169    struct world_surface *mat = &world->surfaces[ material_id ];
 170    pass->fn_bind_textures( world, mat );
 171
 172    for( u32 j=0; j<mdl_arrcount( &world->ent_traffic ); j++ ){
 173       ent_traffic *traffic = mdl_arritm( &world->ent_traffic, j );
 174
 175       for( u32 k=0; k<traffic->submesh_count; k++ ){
 176          sm = mdl_arritm( &world->meta.submeshs,
 177                            traffic->submesh_start+k );
 178
 179          m4x3f mmdl;
 180          q_m3x3( traffic->transform.q, mmdl );
 181          v3_copy( traffic->transform.co, mmdl[3] );
 182
 183          m4x4f m4mdl;
 184          m4x3_expand( mmdl, m4mdl );
 185          m4x4_mul( pass->cam->mtx_prev.pv, m4mdl, m4mdl );
 186
 187          pass->fn_set_mdl( mmdl );
 188          pass->fn_set_uPvmPrev( m4mdl );
 189
 190          mdl_draw_submesh( sm );
 191       }
 192    }
 193 }
 194
 195 static
 196 void world_render_pass( world_instance *world, struct world_pass *pass ){
 197    for( int i=0; i<world->surface_count; i++ ){
 198       struct world_surface *mat = &world->surfaces[i];
 199
 200       if( mat->info.shader == pass->shader ){
 201          mdl_submesh *sm;
 202
 203          if( pass->geo_type == k_world_geo_type_solid ){
 204             sm = &mat->sm_geo;
 205          }
 206          else{
 207             world_render_traffic( world, i, pass );
 208             sm = &mat->sm_no_collide;
 209          }
 210
 211          if( !sm->indice_count )
 212             continue;
 213
 214          m4x3f mmdl;
 215          m4x3_identity( mmdl );
 216          pass->fn_set_mdl( mmdl );
 217          pass->fn_set_uPvmPrev( pass->cam->mtx_prev.pv );
 218
 219          pass->fn_bind_textures( world, mat );
 220          mdl_draw_submesh( sm );
 221       }
 222    }
 223 }
 224
 225 static
 226 void world_render_both_stages( world_instance *world, struct world_pass *pass )
 227 {
 228    mesh_bind( &world->mesh_geo );
 229    pass->geo_type = k_world_geo_type_solid;
 230    world_render_pass( world, pass );
 231
 232    glDisable( GL_CULL_FACE );
 233    mesh_bind( &world->mesh_no_collide );
 234    pass->geo_type = k_world_geo_type_nonsolid;
 235    world_render_pass( world, pass );
 236    glEnable( GL_CULL_FACE );
 237 }
 238
 239 static void bindpoint_diffuse_texture1( world_instance *world,
 240                                            struct world_surface *mat )
 241
 242 {
 243    glActiveTexture( GL_TEXTURE1 );
 244    glBindTexture( GL_TEXTURE_2D, world->textures[ mat->info.tex_diffuse ] );
 245 }
 246
 247 static void bindpoint_diffuse1_and_cubemap10( world_instance *world,
 248                                                  struct world_surface *mat ){
 249    glActiveTexture( GL_TEXTURE1 );
 250    glBindTexture( GL_TEXTURE_2D, world->textures[ mat->info.tex_diffuse ] );
 251
 252    u32 cubemap_id = mat->info.tex_none0,
 253        cubemap_index = 0;
 254
 255    if( mdl_entity_id_type( cubemap_id ) == k_ent_cubemap ){
 256       cubemap_index = mdl_entity_id_id( cubemap_id );
 257    }
 258
 259    ent_cubemap *cm = mdl_arritm( &world->ent_cubemap, cubemap_index );
 260    glActiveTexture( GL_TEXTURE10 );
 261    glBindTexture( GL_TEXTURE_CUBE_MAP, cm->texture_id );
 262
 263    shader_scene_cubemapped_uColour( mat->info.colour );
 264 }
 265
 266 static void render_world_vb( world_instance *world, camera *cam ){
 267    shader_scene_vertex_blend_use();
 268    shader_scene_vertex_blend_uTexGarbage(0);
 269    shader_scene_vertex_blend_uTexGradients(1);
 270    world_link_lighting_ub( world, _shader_scene_vertex_blend.id );
 271    world_bind_position_texture( world, _shader_scene_vertex_blend.id,
 272                                 _uniform_scene_vertex_blend_g_world_depth, 2 );
 273    world_bind_light_array( world, _shader_scene_vertex_blend.id,
 274                                 _uniform_scene_vertex_blend_uLightsArray, 3 );
 275    world_bind_light_index( world, _shader_scene_vertex_blend.id,
 276                                 _uniform_scene_vertex_blend_uLightsIndex, 4 );
 277
 278    glActiveTexture( GL_TEXTURE0 );
 279    glBindTexture( GL_TEXTURE_2D, world_render.tex_terrain_noise );
 280
 281    shader_scene_vertex_blend_uPv( cam->mtx.pv );
 282    shader_scene_vertex_blend_uCamera( cam->transform[3] );
 283
 284    struct world_pass pass = {
 285       .shader = k_shader_standard_vertex_blend,
 286       .cam = cam,
 287       .fn_bind_textures = bindpoint_diffuse_texture1,
 288       .fn_set_mdl = shader_scene_vertex_blend_uMdl,
 289       .fn_set_uPvmPrev = shader_scene_vertex_blend_uPvmPrev,
 290    };
 291
 292    world_render_both_stages( world, &pass );
 293 }
 294
 295 static void world_shader_standard_bind( world_instance *world, camera *cam ){
 296    shader_scene_standard_use();
 297    shader_scene_standard_uTexGarbage(0);
 298    shader_scene_standard_uTexMain(1);
 299    shader_scene_standard_uPv( cam->mtx.pv );
 300
 301    world_link_lighting_ub( world, _shader_scene_standard.id );
 302    world_bind_position_texture( world, _shader_scene_standard.id,
 303                                 _uniform_scene_standard_g_world_depth, 2 );
 304    world_bind_light_array( world, _shader_scene_standard.id,
 305                                 _uniform_scene_standard_uLightsArray, 3 );
 306    world_bind_light_index( world, _shader_scene_standard.id,
 307                                 _uniform_scene_standard_uLightsIndex, 4 );
 308
 309    bind_terrain_noise();
 310    shader_scene_standard_uCamera( cam->transform[3] );
 311 }
 312
 313 static void render_world_standard( world_instance *world, camera *cam ){
 314    world_shader_standard_bind( world, cam );
 315    struct world_pass pass = {
 316       .shader = k_shader_standard,
 317       .cam = cam,
 318       .fn_bind_textures = bindpoint_diffuse_texture1,
 319       .fn_set_mdl = shader_scene_standard_uMdl,
 320       .fn_set_uPvmPrev = shader_scene_standard_uPvmPrev,
 321    };
 322
 323    world_render_both_stages( world, &pass );
 324 }
 325
 326 static void render_world_cubemapped( world_instance *world, camera *cam,
 327                                         int layer_depth ){
 328    if( !mdl_arrcount( &world->ent_cubemap ) )
 329       return;
 330
 331    if( layer_depth == -1 ){
 332       world_shader_standard_bind( world, cam );
 333
 334       struct world_pass pass = {
 335          .shader = k_shader_cubemap,
 336          .cam = cam,
 337          .fn_bind_textures = bindpoint_diffuse_texture1,
 338          .fn_set_mdl = shader_scene_standard_uMdl,
 339          .fn_set_uPvmPrev = shader_scene_standard_uPvmPrev,
 340       };
 341
 342       world_render_both_stages( world, &pass );
 343    }
 344    else {
 345       shader_scene_cubemapped_use();
 346       shader_scene_cubemapped_uTexGarbage(0);
 347       shader_scene_cubemapped_uTexMain(1);
 348       shader_scene_cubemapped_uTexCubemap(10);
 349       shader_scene_cubemapped_uPv( cam->mtx.pv );
 350
 351       world_link_lighting_ub( world, _shader_scene_cubemapped.id );
 352       world_bind_position_texture( world, _shader_scene_cubemapped.id,
 353                                    _uniform_scene_cubemapped_g_world_depth, 2 );
 354       world_bind_light_array( world, _shader_scene_cubemapped.id,
 355                                    _uniform_scene_cubemapped_uLightsArray, 3 );
 356       world_bind_light_index( world, _shader_scene_cubemapped.id,
 357                                    _uniform_scene_cubemapped_uLightsIndex, 4 );
 358
 359       bind_terrain_noise();
 360       shader_scene_cubemapped_uCamera( cam->transform[3] );
 361
 362       struct world_pass pass = {
 363          .shader = k_shader_cubemap,
 364          .cam = cam,
 365          .fn_bind_textures = bindpoint_diffuse1_and_cubemap10,
 366          .fn_set_mdl = shader_scene_cubemapped_uMdl,
 367          .fn_set_uPvmPrev = shader_scene_cubemapped_uPvmPrev,
 368       };
 369
 370       world_render_both_stages( world, &pass );
 371    }
 372 }
 373
 374 static void render_world_alphatest( world_instance *world, camera *cam ){
 375    shader_scene_standard_alphatest_use();
 376    shader_scene_standard_alphatest_uTexGarbage(0);
 377    shader_scene_standard_alphatest_uTexMain(1);
 378    shader_scene_standard_alphatest_uPv( cam->mtx.pv );
 379
 380    world_link_lighting_ub( world, _shader_scene_standard_alphatest.id );
 381    world_bind_position_texture( world, _shader_scene_standard_alphatest.id,
 382                         _uniform_scene_standard_alphatest_g_world_depth, 2 );
 383    world_bind_light_array( world, _shader_scene_standard_alphatest.id,
 384                         _uniform_scene_standard_alphatest_uLightsArray, 3 );
 385    world_bind_light_index( world, _shader_scene_standard_alphatest.id,
 386                            _uniform_scene_standard_alphatest_uLightsIndex, 4 );
 387
 388
 389    bind_terrain_noise();
 390
 391
 392    shader_scene_standard_alphatest_uCamera( cam->transform[3] );
 393
 394    glDisable(GL_CULL_FACE);
 395
 396    struct world_pass pass = {
 397       .shader = k_shader_standard_cutout,
 398       .cam = cam,
 399       .fn_bind_textures = bindpoint_diffuse_texture1,
 400       .fn_set_mdl = shader_scene_standard_alphatest_uMdl,
 401       .fn_set_uPvmPrev = shader_scene_standard_alphatest_uPvmPrev,
 402    };
 403
 404    world_render_both_stages( world, &pass );
 405
 406    glEnable(GL_CULL_FACE);
 407 }
 408
 409 static
 410 void world_render_challenges( world_instance *world, struct world_pass *pass,
 411                               v3f pos, int layer_depth ){
 412    if( !world ) return;
 413    if( skaterift.activity == k_skaterift_replay ) return;
 414    if( world != world_current_instance() ) return;
 415
 416    /* sort lists */
 417    f32 radius = 40.0f;
 418
 419    u32 objective_list[ 32 ],
 420        challenge_list[ 16 ];
 421
 422    v2f objective_uv_offsets[ 32 ];
 423
 424    u32 objective_count = 0,
 425        challenge_count = 0;
 426
 427    ent_challenge *active_challenge = NULL;
 428    int running = 0;
 429    if( mdl_entity_id_type( world_static.focused_entity ) == k_ent_challenge ){
 430       if( (skaterift.activity == k_skaterift_default) &&
 431            world_static.challenge_target ){
 432          running = 1;
 433       }
 434
 435       if( !((skaterift.activity != k_skaterift_ent_focus) &&
 436             !world_static.challenge_target) ){
 437          world_instance *challenge_world = world_current_instance();
 438          u32 index = mdl_entity_id_id( world_static.focused_entity );
 439          active_challenge = mdl_arritm(&challenge_world->ent_challenge, index);
 440       }
 441    }
 442
 443    if( active_challenge ){
 444       shader_scene_fxglow_uUvOffset( (v2f){ 8.0f/256.0f, 0.0f } );
 445       challenge_list[ challenge_count ++ ] = world_static.focused_entity;
 446
 447       u32 next = active_challenge->first;
 448       while( mdl_entity_id_type(next) == k_ent_objective ){
 449          u32 index = mdl_entity_id_id( next );
 450          objective_list[ objective_count ++ ] = index;
 451
 452          ent_objective *objective = mdl_arritm( &world->ent_objective, index );
 453          next = objective->id_next;
 454       }
 455
 456       radius = 10000.0f;
 457    }
 458    else {
 459       shader_scene_fxglow_uUvOffset( (v2f){ 0.0f, 0.0f } );
 460       bh_iter it;
 461       bh_iter_init_range( 0, &it, pos, radius+10.0f );
 462       i32 idx;
 463       while( bh_next( world->entity_bh, &it, &idx ) ){
 464          u32 id    = world->entity_list[ idx ],
 465              type  = mdl_entity_id_type( id ),
 466              index = mdl_entity_id_id( id );
 467
 468          if( type == k_ent_objective ) {
 469             if( objective_count < vg_list_size(objective_list) )
 470                objective_list[ objective_count ++ ] = index;
 471          }
 472          else if( type == k_ent_challenge ){
 473             if( challenge_count < vg_list_size(challenge_list) )
 474                challenge_list[ challenge_count ++ ] = index;
 475          }
 476       }
 477    }
 478
 479    /* render objectives */
 480    glDisable( GL_CULL_FACE );
 481    mesh_bind( &world->mesh_no_collide );
 482    u32 last_material = 0;
 483    for( u32 i=0; i<objective_count; i++ ){
 484       u32 index = objective_list[ i ];
 485       ent_objective *objective = mdl_arritm( &world->ent_objective, index );
 486       if( (objective->flags & k_ent_objective_hidden) &&
 487           !active_challenge ) continue;
 488
 489       f32 scale = 1.0f;
 490
 491       if( running ){
 492          u32 passed = objective->flags & k_ent_objective_passed;
 493          f32 target = passed? 0.0f: 1.0f;
 494          vg_slewf(&objective->transform.s[0], target, vg.time_frame_delta*4.0f);
 495          scale = vg_smoothstepf( objective->transform.s[0] );
 496
 497          if( (objective == world_static.challenge_target) || passed )
 498             shader_scene_fxglow_uUvOffset( (v2f){ 16.0f/256.0f, 0.0f } );
 499          else
 500             shader_scene_fxglow_uUvOffset( (v2f){ 8.0f/256.0f, 0.0f } );
 501       }
 502       else {
 503          f32 dist = v3_dist( objective->transform.co, pos ) * (1.0f/radius);
 504          scale = vg_smoothstepf( vg_clampf( 5.0f-dist*5.0f, 0.0f,1.0f ) );
 505       }
 506
 507       m4x3f mmdl;
 508       q_m3x3( objective->transform.q, mmdl );
 509       m3x3_scalef( mmdl, scale );
 510       v3_copy( objective->transform.co, mmdl[3] );
 511       shader_scene_fxglow_uMdl( mmdl );
 512
 513       for( u32 j=0; j<objective->submesh_count; j++ ){
 514          mdl_submesh *sm = mdl_arritm( &world->meta.submeshs,
 515                                        objective->submesh_start + j );
 516
 517          if( sm->material_id != last_material ){
 518             last_material = sm->material_id;
 519             pass->fn_bind_textures( world, &world->surfaces[sm->material_id] );
 520          }
 521          mdl_draw_submesh( sm );
 522       }
 523    }
 524
 525    /* render texts */
 526    font3d_bind( &gui.font, k_font_shader_world, 0, world, &skaterift.cam );
 527
 528    char buf[32];
 529    u32 count = 0;
 530
 531    for( u32 i=0; i<mdl_arrcount(&world->ent_challenge); i++ ){
 532       ent_challenge *challenge = mdl_arritm( &world->ent_challenge, i );
 533       if( challenge->status ) count ++;
 534    }
 535
 536    int c=0;
 537    c+=highscore_intl( buf+c, count, 3 );
 538    buf[c++] = '/';
 539    c+=highscore_intl( buf+c, mdl_arrcount(&world->ent_challenge), 3 );
 540    buf[c++] = '\0';
 541
 542    f32 w = font3d_string_width( 1, buf );
 543    m4x3f mlocal;
 544    m3x3_identity( mlocal );
 545    mlocal[3][0] = -w*0.5f;
 546    mlocal[3][1] = 0.0f;
 547    mlocal[3][2] = 0.0f;
 548
 549    for( u32 i=0; i<challenge_count; i++ ){
 550       u32 index = challenge_list[ i ];
 551       ent_challenge *challenge = mdl_arritm( &world->ent_challenge, index );
 552       m4x3f mmdl;
 553       mdl_transform_m4x3( &challenge->transform, mmdl );
 554       m4x3_mul( mmdl, mlocal, mmdl );
 555
 556       vg_line_point( challenge->transform.co, 0.25f, VG__RED );
 557
 558       f32 dist = v3_dist( challenge->transform.co, pos ) * (1.0f/radius),
 559           scale = vg_smoothstepf( vg_clampf( 10.0f-dist*10.0f, 0.0f,1.0f ) ),
 560           colour = 0.0f;
 561
 562       if( challenge->status )
 563          colour = 1.0f;
 564
 565       shader_scene_font_uOpacity( scale );
 566       shader_scene_font_uColourize( colour );
 567       font3d_simple_draw( 1, buf, &skaterift.cam, mmdl );
 568    }
 569 }
 570
 571 static void render_world_fxglow( world_instance *world, camera *cam,
 572                                     int layer_depth ){
 573    shader_scene_fxglow_use();
 574    shader_scene_fxglow_uUvOffset( (v2f){ 0.0f, 0.0f } );
 575    shader_scene_fxglow_uTexMain(1);
 576    shader_scene_fxglow_uPv( cam->mtx.pv );
 577
 578    world_link_lighting_ub( world, _shader_scene_fxglow.id );
 579    world_bind_position_texture( world, _shader_scene_fxglow.id,
 580                         _uniform_scene_fxglow_g_world_depth, 2 );
 581    world_bind_light_array( world, _shader_scene_fxglow.id,
 582                         _uniform_scene_fxglow_uLightsArray, 3 );
 583    world_bind_light_index( world, _shader_scene_fxglow.id,
 584                            _uniform_scene_fxglow_uLightsIndex, 4 );
 585
 586    shader_scene_fxglow_uCamera( cam->transform[3] );
 587    glDisable(GL_CULL_FACE);
 588
 589    struct world_pass pass = {
 590       .shader = k_shader_fxglow,
 591       .cam = cam,
 592       .fn_bind_textures = bindpoint_diffuse_texture1,
 593       .fn_set_mdl = shader_scene_fxglow_uMdl,
 594       .fn_set_uPvmPrev = shader_scene_fxglow_uPvmPrev,
 595    };
 596
 597    world_render_both_stages( world, &pass );
 598    world_render_challenges( world, &pass, cam->pos, layer_depth );
 599
 600    glEnable(GL_CULL_FACE);
 601 }
 602
 603 static void bindpoint_terrain( world_instance *world,
 604                                   struct world_surface *mat )
 605 {
 606    glActiveTexture( GL_TEXTURE1 );
 607    glBindTexture( GL_TEXTURE_2D, world->textures[ mat->info.tex_diffuse ] );
 608
 609    shader_scene_terrain_uSandColour( mat->info.colour );
 610    shader_scene_terrain_uBlendOffset( mat->info.colour1 );
 611 }
 612
 613 static void bindpoint_override( world_instance *world,
 614                                    struct world_surface *mat ){
 615    if( mat->info.flags & k_material_flag_collision ){
 616       shader_scene_override_uAlphatest(0);
 617    }
 618    else{
 619       glActiveTexture( GL_TEXTURE1 );
 620       glBindTexture( GL_TEXTURE_2D, world->textures[ mat->info.tex_diffuse ] );
 621       shader_scene_override_uAlphatest(1);
 622    }
 623 }
 624
 625 static void render_terrain( world_instance *world, camera *cam ){
 626    shader_scene_terrain_use();
 627    shader_scene_terrain_uTexGarbage(0);
 628    shader_scene_terrain_uTexGradients(1);
 629
 630    WORLD_BIND_LIGHT_BUFFERS_UB0_TEX234( world, scene_terrain );
 631    glActiveTexture( GL_TEXTURE0 );
 632    glBindTexture( GL_TEXTURE_2D, world_render.tex_terrain_noise );
 633
 634    shader_scene_terrain_uPv( cam->mtx.pv );
 635    shader_scene_terrain_uCamera( cam->transform[3] );
 636
 637    struct world_pass pass = {
 638       .shader = k_shader_terrain_blend,
 639       .cam = cam,
 640       .fn_bind_textures = bindpoint_terrain,
 641       .fn_set_mdl = shader_scene_terrain_uMdl,
 642       .fn_set_uPvmPrev = shader_scene_terrain_uPvmPrev,
 643    };
 644
 645    world_render_both_stages( world, &pass );
 646 }
 647
 648 static void render_sky( world_instance *world, camera *cam )
 649 {
 650    /*
 651     * Modify matrix to remove clipping and view translation
 652     */
 653    m4x4f v,
 654          v_prev,
 655          pv,
 656          pv_prev;
 657
 658    m4x4_copy( cam->mtx.v, v );
 659    m4x4_copy( cam->mtx_prev.v, v_prev );
 660    v3_zero( v[3] );
 661    v3_zero( v_prev[3] );
 662
 663    m4x4_copy( cam->mtx.p,      pv );
 664    m4x4_copy( cam->mtx_prev.p, pv_prev );
 665    m4x4_reset_clipping( pv,      cam->farz, cam->nearz );
 666    m4x4_reset_clipping( pv_prev, cam->farz, cam->nearz );
 667
 668    m4x4_mul( pv,      v,      pv );
 669    m4x4_mul( pv_prev, v_prev, pv_prev );
 670
 671    m4x3f identity_matrix;
 672    m4x3_identity( identity_matrix );
 673
 674    /*
 675     * Draw
 676     */
 677    shader_model_sky_use();
 678    shader_model_sky_uMdl( identity_matrix );
 679    shader_model_sky_uPv( pv );
 680    shader_model_sky_uPvmPrev( pv_prev );
 681    shader_model_sky_uTexGarbage(0);
 682    world_link_lighting_ub( world, _shader_model_sky.id );
 683
 684    glActiveTexture( GL_TEXTURE0 );
 685    glBindTexture( GL_TEXTURE_2D, world_render.tex_terrain_noise );
 686
 687    glDepthMask( GL_FALSE );
 688    glDisable( GL_DEPTH_TEST );
 689
 690    mesh_bind( &world_render.skydome );
 691    mesh_draw( &world_render.skydome );
 692
 693    glEnable( GL_DEPTH_TEST );
 694    glDepthMask( GL_TRUE );
 695 }
 696
 697 static void render_world_gates( world_instance *world, camera *cam,
 698                                    int layer_depth )
 699 {
 700    float closest = INFINITY;
 701    struct ent_gate *gate = NULL;
 702
 703    for( u32 i=0; i<mdl_arrcount(&world->ent_gate); i++ ){
 704       ent_gate *gi = mdl_arritm( &world->ent_gate, i );
 705
 706       if( !(gi->flags & k_ent_gate_linked) )
 707          continue;
 708
 709       float dist = v3_dist2( gi->co[0], cam->transform[3] );
 710
 711       vg_line_point( gi->co[0], 0.25f, VG__BLUE );
 712
 713       if( dist < closest ){
 714          closest = dist;
 715          gate = gi;
 716       }
 717    }
 718
 719    world->rendering_gate = gate;
 720    if( gate ){
 721       if( gate->flags & k_ent_gate_locked ) return;
 722
 723       if( gate->flags & k_ent_gate_nonlocal ){
 724          if( world_static.load_state != k_world_loader_none ){
 725             world->rendering_gate = NULL;
 726             return;
 727          }
 728
 729          world_instance *dest_world = &world_static.instances[ gate->target ];
 730          render_gate( world, dest_world, gate, cam, layer_depth );
 731       }
 732       else{
 733          render_gate( world, world, gate, cam, layer_depth );
 734       }
 735    }
 736 }
 737
 738 static void world_prerender( world_instance *world )
 739 {
 740
 741    if( mdl_arrcount( &world->ent_light ) ){
 742       f32 rate = vg_maxf(0.1f, fabsf(k_day_length)) * vg_signf(k_day_length);
 743       world->time += vg.time_delta * (1.0/(rate*60.0));
 744    }
 745    else{
 746       world->time = 0.834;
 747    }
 748
 749    struct ub_world_lighting *state = &world->ub_lighting;
 750
 751    state->g_time = world->time;
 752    state->g_realtime = vg.time_real;
 753    state->g_debug_indices = k_debug_light_indices;
 754    state->g_light_preview = k_light_preview;
 755    state->g_debug_complexity = k_debug_light_complexity;
 756
 757    if( skaterift.activity == k_skaterift_respawning )
 758       state->g_time_of_day = 0.1f;
 759    else
 760       state->g_time_of_day = vg_fractf( world->time );
 761
 762    state->g_day_phase   = cosf( state->g_time_of_day * VG_PIf * 2.0f );
 763    state->g_sunset_phase= cosf( state->g_time_of_day * VG_PIf * 4.0f + VG_PIf );
 764
 765    state->g_day_phase    =       state->g_day_phase    * 0.5f + 0.5f;
 766    state->g_sunset_phase = powf( state->g_sunset_phase * 0.5f + 0.5f, 6.0f );
 767
 768    float a = state->g_time_of_day * VG_PIf * 2.0f;
 769    state->g_sun_dir[0] = sinf( a );
 770    state->g_sun_dir[1] = cosf( a );
 771    state->g_sun_dir[2] = 0.2f;
 772    v3_normalize( state->g_sun_dir );
 773
 774    world->probabilities[ k_probability_curve_constant ] = 1.0f;
 775    float dp = state->g_day_phase;
 776
 777    world->probabilities[ k_probability_curve_wildlife_day ] =
 778       (dp*dp*0.8f+state->g_sunset_phase)*0.8f;
 779    world->probabilities[ k_probability_curve_wildlife_night ] =
 780       1.0f-powf(fabsf((state->g_time_of_day-0.5f)*5.0f),5.0f);
 781
 782    glBindBuffer( GL_UNIFORM_BUFFER, world->ubo_lighting );
 783    glBufferSubData( GL_UNIFORM_BUFFER, 0,
 784                     sizeof(struct ub_world_lighting), &world->ub_lighting );
 785 }
 786
 787 static void render_world( world_instance *world, camera *cam,
 788                              int layer_depth )
 789 {
 790    render_sky( world, cam );
 791
 792    render_world_routes( world, cam, layer_depth );
 793    render_world_standard( world, cam );
 794    render_world_cubemapped( world, cam, layer_depth );
 795
 796    render_world_vb( world, cam );
 797    render_world_alphatest( world, cam );
 798    render_terrain( world, cam );
 799
 800    if( layer_depth == -1 ) return;
 801    if( layer_depth == 0 ){
 802       world_entity_focus_render();
 803
 804       /* Render SFD's */
 805       u32 closest = 0;
 806       float min_dist = INFINITY;
 807
 808       if( mdl_arrcount( &world->ent_route ) ){
 809          for( u32 i=0; i<mdl_arrcount( &world->ent_route ); i++ ){
 810             ent_route *route = mdl_arritm( &world->ent_route, i );
 811             float dist = v3_dist2( route->board_transform[3], cam->pos );
 812
 813             if( dist < min_dist ){
 814                min_dist = dist;
 815                closest = i;
 816             }
 817          }
 818
 819          ent_route *route = mdl_arritm( &world->ent_route, closest );
 820          sfd_render( world, cam, route->board_transform );
 821       }
 822    }
 823
 824    f32 greyout = 0.0f;
 825    if( mdl_entity_id_type(world_static.focused_entity) == k_ent_challenge )
 826       greyout = world_static.focus_strength;
 827
 828    if( greyout > 0.0f ){
 829       glDrawBuffers( 1, (GLenum[]){ GL_COLOR_ATTACHMENT0 } );
 830       glEnable(GL_BLEND);
 831       glDisable(GL_DEPTH_TEST);
 832       glDepthMask(GL_FALSE);
 833       glBlendFunc(GL_SRC_ALPHA, GL_ONE_MINUS_SRC_ALPHA);
 834       glBlendEquation(GL_FUNC_ADD);
 835
 836       shader_blitcolour_use();
 837       shader_blitcolour_uColour( (v4f){ 0.5f, 0.5f, 0.5f, greyout*0.56f } );
 838       render_fsquad();
 839
 840       glDisable(GL_BLEND);
 841       glEnable(GL_DEPTH_TEST);
 842       glDepthMask(GL_TRUE);
 843       glDrawBuffers( 2, (GLenum[]){ GL_COLOR_ATTACHMENT0,
 844                                     GL_COLOR_ATTACHMENT1 } );
 845    }
 846
 847    render_world_fxglow( world, cam, layer_depth );
 848 }
 849
 850
 851 static
 852 void render_world_override_pass( world_instance *world,
 853                                  struct world_pass *pass ){
 854    for( int i=0; i<world->surface_count; i++ ){
 855       struct world_surface *mat = &world->surfaces[i];
 856
 857       if( mat->info.flags & k_material_flag_ghosts ) continue;
 858
 859       mdl_submesh *sm;
 860       if( pass->geo_type == k_world_geo_type_solid )
 861          sm = &mat->sm_geo;
 862       else
 863          sm = &mat->sm_no_collide;
 864
 865       if( !sm->indice_count )
 866          continue;
 867
 868       m4x3f mmdl;
 869       m4x3_identity( mmdl );
 870       pass->fn_set_mdl( mmdl );
 871       pass->fn_set_uPvmPrev( pass->cam->mtx_prev.pv );
 872       pass->fn_bind_textures( world, mat );
 873       mdl_draw_submesh( sm );
 874    }
 875 }
 876
 877 static void render_world_override( world_instance *world ){
 878    struct world_pass pass = {
 879       .cam = &skaterift.cam,
 880       .fn_bind_textures = bindpoint_override,
 881       .fn_set_mdl = shader_scene_override_uMdl,
 882       .fn_set_uPvmPrev = shader_scene_override_uPvmPrev,
 883       .shader = k_shader_override
 884    };
 885
 886    shader_scene_override_use();
 887    respawn_chooser_shader_uniforms();
 888    shader_scene_override_uTexGarbage(0);
 889    shader_scene_override_uTexMain(1);
 890    shader_scene_override_uPv( pass.cam->mtx.pv );
 891
 892    WORLD_BIND_LIGHT_BUFFERS_UB0_TEX234( world, scene_override );
 893    bind_terrain_noise();
 894    shader_scene_override_uCamera( pass.cam->transform[3] );
 895
 896    glDisable( GL_CULL_FACE );
 897    mesh_bind( &world->mesh_geo );
 898    pass.geo_type = k_world_geo_type_solid;
 899    render_world_override_pass( world, &pass );
 900    mesh_bind( &world->mesh_no_collide );
 901    pass.geo_type = k_world_geo_type_nonsolid;
 902    render_world_override_pass( world, &pass );
 903    glEnable( GL_CULL_FACE );
 904 }
 905
 906 static void render_cubemap_side( world_instance *world, ent_cubemap *cm,
 907                                     u32 side ){
 908    camera cam;
 909    glFramebufferTexture2D( GL_FRAMEBUFFER, GL_COLOR_ATTACHMENT0,
 910          GL_TEXTURE_CUBE_MAP_POSITIVE_X + side, cm->texture_id, 0 );
 911    glClear( GL_DEPTH_BUFFER_BIT );
 912
 913    v3f forward[6] = {
 914       { -1.0f,  0.0f,  0.0f },
 915       {  1.0f,  0.0f,  0.0f },
 916       {  0.0f, -1.0f,  0.0f },
 917       {  0.0f,  1.0f,  0.0f },
 918       {  0.0f,  0.0f, -1.0f },
 919       {  0.0f,  0.0f,  1.0f }
 920    };
 921    v3f up[6] = {
 922       { 0.0f, -1.0f,  0.0f },
 923       { 0.0f, -1.0f,  0.0f },
 924       { 0.0f,  0.0f,  1.0f },
 925       { 0.0f,  0.0f, -1.0f },
 926       { 0.0f, -1.0f,  0.0f },
 927       { 0.0f, -1.0f,  0.0f }
 928    };
 929
 930    v3_zero( cam.angles );
 931    v3_copy( cm->co, cam.pos );
 932
 933    v3_copy( forward[side], cam.transform[2] );
 934    v3_copy( up[side], cam.transform[1] );
 935    v3_cross( up[side], forward[side], cam.transform[0] );
 936    v3_copy( cm->co, cam.transform[3] );
 937    m4x3_invert_affine( cam.transform, cam.transform_inverse );
 938
 939    camera_update_view( &cam );
 940
 941    cam.nearz = 0.1f;
 942    cam.farz = 1000.0f;
 943    cam.fov = 90.0f;
 944    m4x4_copy( cam.mtx.p,  cam.mtx_prev.p );
 945    m4x4_projection( cam.mtx.p, cam.fov, 1.0f, cam.nearz, cam.farz );
 946    camera_finalize( &cam );
 947    camera_finalize( &cam );
 948
 949    render_world( world, &cam, -1 );
 950 }
 951
 952 static void render_world_cubemaps( world_instance *world ){
 953    if( world->cubemap_cooldown )
 954       world->cubemap_cooldown --;
 955    else{
 956       world->cubemap_cooldown = 60;
 957
 958       glViewport( 0, 0, WORLD_CUBEMAP_RES, WORLD_CUBEMAP_RES );
 959       for( u32 i=0; i<mdl_arrcount( &world->ent_cubemap ); i++ ){
 960          ent_cubemap *cm = mdl_arritm( &world->ent_cubemap, i );
 961          glBindFramebuffer( GL_FRAMEBUFFER, cm->framebuffer_id );
 962
 963          world->cubemap_side ++;
 964          if( world->cubemap_side >= 6 )
 965             world->cubemap_side = 0;
 966
 967          render_cubemap_side( world, cm, world->cubemap_side );
 968       }
 969    }
 970 }
 971
 972 static void render_world_depth( world_instance *world, camera *cam ){
 973    m4x3f identity_matrix;
 974    m4x3_identity( identity_matrix );
 975
 976    shader_scene_depth_use();
 977    shader_scene_depth_uCamera( cam->transform[3] );
 978    shader_scene_depth_uPv( cam->mtx.pv );
 979    shader_scene_depth_uPvmPrev( cam->mtx_prev.pv );
 980    shader_scene_depth_uMdl( identity_matrix );
 981    world_link_lighting_ub( world, _shader_scene_depth.id );
 982
 983    mesh_bind( &world->mesh_geo );
 984    mesh_draw( &world->mesh_geo );
 985 }
 986
 987 static void render_world_position( world_instance *world, camera *cam ){
 988    m4x3f identity_matrix;
 989    m4x3_identity( identity_matrix );
 990
 991    shader_scene_position_use();
 992    shader_scene_position_uCamera( cam->transform[3] );
 993    shader_scene_position_uPv( cam->mtx.pv );
 994    shader_scene_position_uPvmPrev( cam->mtx_prev.pv );
 995    shader_scene_position_uMdl( identity_matrix );
 996    world_link_lighting_ub( world, _shader_scene_position.id );
 997
 998    mesh_bind( &world->mesh_geo );
 999    mesh_draw( &world->mesh_geo );
1000 }
1001
1002 #endif