world.h

   1 /*
   2  * Copyright (C) 2021-2022 Mt.ZERO Software, Harry Godden - All Rights Reserved
   3  */
   4
   5 #include "common.h"
   6
   7 #ifndef WORLD_H
   8 #define WORLD_H
   9
  10 typedef struct world_instance world_instance;
  11
  12 #include "vg/vg_loader.h"
  13
  14 #include "network.h"
  15 #include "network_msg.h"
  16 #include "scene.h"
  17 #include "render.h"
  18 #include "rigidbody.h"
  19 #include "bvh.h"
  20 #include "model.h"
  21
  22 #include "shaders/scene_standard.h"
  23 #include "shaders/scene_standard_alphatest.h"
  24 #include "shaders/scene_vertex_blend.h"
  25 #include "shaders/scene_terrain.h"
  26 #include "shaders/scene_depth.h"
  27
  28 #include "shaders/model_sky.h"
  29
  30 typedef struct teleport_gate teleport_gate;
  31
  32 enum { k_max_ui_segments = 8 };
  33
  34 enum { k_max_ui_elements = k_max_ui_segments };
  35 enum { k_max_element_verts = 10 };
  36 enum { k_max_element_indices = 20 };
  37
  38 enum { k_route_ui_max_verts = k_max_ui_elements*k_max_element_verts };
  39 enum { k_route_ui_max_indices = k_max_ui_elements*k_max_element_indices };
  40
  41 enum logic_type
  42 {
  43    k_logic_type_relay         = 1,
  44    k_logic_type_chance        = 2,
  45    k_logic_type_achievement   = 3
  46 };
  47
  48 enum geo_type
  49 {
  50    k_geo_type_solid = 0,
  51    k_geo_type_nonsolid = 1,
  52    k_geo_type_water = 2
  53 };
  54
  55 struct world_instance
  56 {
  57    /* This is a small flag we use to changelevel.
  58     * It will not be cleared until all sounds stop playing
  59     */
  60
  61    /* Fixed items
  62     * -------------------------------------------------------
  63     */
  64
  65    char  world_name[ 64 ];
  66
  67    struct
  68    {
  69       boxf depthbounds;
  70       int depth_computed;
  71
  72       float height;
  73       int enabled;
  74       v4f plane;
  75    }
  76    water;
  77
  78    /* STD140 */
  79    struct ub_world_lighting
  80    {
  81       /* v3f (padded) */
  82       v4f g_light_colours[3],
  83           g_light_directions[3],
  84           g_ambient_colour;
  85
  86       v4f g_water_plane,
  87           g_depth_bounds;
  88
  89       float g_water_fog;
  90       int g_light_count;
  91       int g_light_preview;
  92       int g_shadow_samples;
  93
  94       v4f g_point_light_positions[32];
  95       v4f g_point_light_colours[32];
  96    }
  97    ub_lighting;
  98    GLuint ubo_lighting;
  99    int    ubo_bind_point;
 100
 101    struct framebuffer heightmap;
 102
 103    /*
 104     * Dynamically allocated when world_load is called.
 105     *
 106     *                  the following arrays index somewhere into this linear
 107     *                  allocator
 108     *
 109     * (world_gen.h)
 110     * --------------------------------------------------------------------------
 111     */
 112    /*
 113     * Main world .mdl
 114     */
 115    mdl_context *meta;
 116
 117    /*
 118     * Materials / textures
 119     */
 120
 121    GLuint *textures;
 122    u32 texture_count;
 123
 124    struct world_material
 125    {
 126       mdl_material info;
 127       mdl_submesh sm_geo,
 128                   sm_no_collide;
 129    }
 130    * materials;
 131    u32 material_count;
 132
 133    /*
 134     * Named safe places to respawn
 135     */
 136    struct respawn_point
 137    {
 138       v3f co;
 139       v4f q;
 140       const char *name;
 141    }
 142    * spawns;
 143    u32 spawn_count;
 144
 145    /*
 146     * Audio player entities
 147     */
 148    struct world_audio_thing
 149    {
 150       v3f pos;
 151       float volume;
 152       u32 flags;
 153
 154       audio_player player;
 155       audio_clip temp_embedded_clip;
 156    }
 157    * audio_things;
 158    u32 audio_things_count;
 159
 160    /*
 161     * Relays
 162     */
 163    struct logic_relay
 164    {
 165       v3f pos;
 166
 167       struct relay_target
 168       {
 169          u32 sub_id;
 170          enum classtype classtype;
 171       }
 172       targets[4];
 173       u32 target_count;
 174    }
 175    * logic_relays;
 176    u32 relay_count;
 177
 178    /*
 179     * Box trigger entities
 180     */
 181    struct trigger_zone
 182    {
 183       m4x3f transform, inv_transform;
 184
 185       struct relay_target target;
 186    }
 187    * triggers;
 188    u32 trigger_count;
 189
 190    /*
 191     * Achievements
 192     */
 193    struct logic_achievement
 194    {
 195       v3f pos;
 196       const char *achievement_id;
 197       u32 achieved;
 198    }
 199    * logic_achievements;
 200    u32 achievement_count;
 201
 202    /*
 203     * Lights
 204     */
 205    struct world_light
 206    {
 207       v3f co;
 208       v4f colour;
 209    }
 210    * lights;
 211    u32 light_count;
 212
 213    /*
 214     * Routes (world_routes.h)
 215     * --------------------------------------------------------------------------
 216     */
 217    struct route_node
 218    {
 219       v3f co, right, up, h;
 220       u32 next[2];
 221
 222       u32 special_type, special_id, current_refs, ref_count;
 223       u32 route_ids[4];    /* Gates can be linked into up to four routes */
 224    }
 225    *nodes;
 226    u32 node_count;
 227
 228    struct route
 229    {
 230       u32 track_id;
 231       v4f colour;
 232
 233       u32 start;
 234       mdl_submesh sm;
 235
 236       int active;
 237       float factive;
 238
 239       double best_lap, latest_pass; /* Session */
 240
 241       m4x3f scoreboard_transform;
 242    }
 243    *routes;
 244    u32 route_count;
 245
 246    struct route_gate
 247    {
 248       struct teleport_gate
 249       {
 250          v3f co[2];
 251          v4f q[2];
 252          v2f dims;
 253
 254          m4x3f to_world, recv_to_world, transport;
 255       }
 256       gate;
 257
 258       u32 node_id;
 259
 260       struct route_timing
 261       {
 262          u32 version; /* Incremented on every teleport */
 263          double time;
 264       }
 265       timing;
 266    }
 267    *gates;
 268    u32 gate_count;
 269
 270    struct route_collector
 271    {
 272       struct route_timing timing;
 273    }
 274    *collectors;
 275    u32 collector_count;
 276
 277
 278    /* logic
 279     * ----------------------------------------------------
 280     */
 281
 282    /* world geometry */
 283    scene *scene_geo,
 284          *scene_no_collide,
 285          *scene_lines;
 286
 287    /* spacial mappings */
 288    bh_tree *audio_bh,
 289            *trigger_bh,
 290            *geo_bh;
 291
 292    /* graphics */
 293    glmesh mesh_route_lines;
 294    glmesh mesh_geo,
 295           mesh_no_collide,
 296           mesh_water;
 297
 298    rigidbody rb_geo; /* todo.. ... */
 299 };
 300
 301 VG_STATIC struct world_global
 302 {
 303    /*
 304     * Allocated as system memory
 305     * --------------------------------------------------------------------------
 306     */
 307    void *generic_heap,
 308         *audio_heap;  /* sub buffer of the audio buffer */
 309
 310    /* rendering */
 311    glmesh skydome;
 312    mdl_submesh dome_upper, dome_lower;
 313
 314    glmesh mesh_gate_surface;
 315
 316    double sky_time, sky_rate, sky_target_rate;
 317
 318    /* gates, TODO: active_gate should also know which instance */
 319    u32 active_gate,
 320        current_run_version;
 321    double time, rewind_from, rewind_to, last_use;
 322
 323    /* water rendering */
 324    struct
 325    {
 326       struct framebuffer fbreflect, fbdepth;
 327    }
 328    water;
 329
 330    /* split flap display */
 331    struct
 332    {
 333       mdl_submesh *sm_module, *sm_card;
 334       glmesh mesh_base, mesh_display;
 335
 336       u32 w, h;
 337       float *buffer;
 338    }
 339    sfd;
 340
 341    /* timing bars, fixed maximum amount */
 342    struct route_ui_bar
 343    {
 344       GLuint vao, vbo, ebo;
 345
 346       u32  indices_head;
 347       u32  vertex_head;
 348
 349       struct route_ui_segment
 350       {
 351          float length;
 352          u32 vertex_start, vertex_count,
 353              index_start, index_count, notches;
 354       }
 355       segments[k_max_ui_segments];
 356
 357       u32 segment_start, segment_count, fade_start, fade_count;
 358       double fade_timer_start;
 359       float xpos;
 360    }
 361    ui_bars[16];
 362
 363    v3f render_gate_pos;
 364    int active_route_board;
 365    int in_trigger;
 366
 367    int switching_to_new_world;
 368
 369    world_instance worlds[4];
 370    u32            world_count;
 371    u32            active_world;
 372 }
 373 world_global;
 374
 375 VG_STATIC world_instance *get_active_world( void )
 376 {
 377    return &world_global.worlds[ world_global.active_world ];
 378 }
 379
 380 /*
 381  * API
 382  */
 383
 384 VG_STATIC
 385 int ray_hit_is_ramp( world_instance *world, ray_hit *hit );
 386
 387 VG_STATIC
 388 struct world_material *ray_hit_material( world_instance *world, ray_hit *hit );
 389
 390 VG_STATIC
 391 void ray_world_get_tri( world_instance *world, ray_hit *hit, v3f tri[3] );
 392
 393 VG_STATIC
 394 int ray_world( world_instance *world, v3f pos, v3f dir, ray_hit *hit );
 395
 396 /*
 397  * Submodules
 398  */
 399
 400 #include "world_routes.h"
 401 #include "world_sfd.h"
 402 #include "world_render.h"
 403 #include "world_water.h"
 404 #include "world_gen.h"
 405 #include "world_gate.h"
 406
 407 /*
 408  * -----------------------------------------------------------------------------
 409  *                                    Events
 410  * -----------------------------------------------------------------------------
 411  */
 412
 413 VG_STATIC int world_stop_sound( int argc, const char *argv[] )
 414 {
 415    world_instance *world = get_active_world();
 416
 417    /*
 418     * None of our world audio runs as one shots, they always have a player.
 419     * Therefore it is safe to delete clip data after the players are
 420     * disconnected
 421     */
 422    audio_lock();
 423    for( int i=0; i<world->audio_things_count; i++ )
 424    {
 425       struct world_audio_thing *at = &world->audio_things[i];
 426
 427       if( audio_player_is_playing( &at->player ) )
 428       {
 429          u32 cflags = audio_player_get_flags( &at->player );
 430          audio_player_set_flags( &at->player, cflags | AUDIO_FLAG_KILL );
 431       }
 432    }
 433    audio_unlock();
 434
 435    return 0;
 436 }
 437
 438 VG_STATIC int world_change_world( int argc, const char *argv[] )
 439 {
 440 #if 0
 441    world_instance *world = get_active_world();
 442
 443    if( argc == 0 )
 444    {
 445       vg_info( "%s\n", world.world_name );
 446       return 0;
 447    }
 448    else
 449    {
 450       vg_info( "Switching world...\n" );
 451       strcpy( world.world_name, argv[0] );
 452       world.switching_to_new_world = 1;
 453       world_stop_sound( 0, NULL );
 454    }
 455 #endif
 456
 457    return 0;
 458 }
 459
 460 VG_STATIC void world_init(void)
 461 {
 462 #if 0
 463    vg_var_push( (struct vg_var){
 464       .name = "water_enable",
 465       .data = &world.water.enabled,
 466       .data_type = k_var_dtype_i32,
 467       .opt_i32 = { .min=0, .max=1, .clamp=1 },
 468       .persistent = 0
 469    });
 470 #endif
 471
 472         vg_function_push( (struct vg_cmd)
 473    {
 474                 .name = "world_stop_sound",
 475                 .function = world_stop_sound
 476         });
 477
 478         vg_function_push( (struct vg_cmd)
 479    {
 480                 .name = "world",
 481                 .function = world_change_world
 482         });
 483
 484    world_global.sky_rate = 1.0;
 485    world_global.sky_target_rate = 1.0;
 486
 487    shader_scene_standard_register();
 488    shader_scene_standard_alphatest_register();
 489    shader_scene_vertex_blend_register();
 490    shader_scene_terrain_register();
 491    shader_scene_depth_register();
 492
 493    shader_model_sky_register();
 494
 495    vg_info( "Loading world resources\n" );
 496
 497    vg_linear_clear( vg_mem.scratch );
 498    mdl_context *msky = mdl_load_full( vg_mem.scratch, "models/rs_skydome.mdl" );
 499
 500    mdl_node *nupper = mdl_node_from_name( msky, "dome_complete" );
 501    world_global.dome_upper = *mdl_node_submesh( msky, nupper, 0 );
 502
 503    vg_acquire_thread_sync();
 504    {
 505       mdl_unpack_glmesh( msky, &world_global.skydome );
 506    }
 507    vg_release_thread_sync();
 508
 509    /* Other systems */
 510    vg_info( "Loading other world systems\n" );
 511
 512    vg_loader_step( world_render_init, NULL );
 513    vg_loader_step( world_sfd_init, NULL );
 514    vg_loader_step( world_water_init, NULL );
 515    vg_loader_step( world_gates_init, NULL );
 516    vg_loader_step( world_routes_init, NULL );
 517
 518    /* Allocate dynamic world memory arena */
 519    u32 max_size = 76*1024*1024;
 520    world_global.generic_heap = vg_create_linear_allocator( vg_mem.rtmemory,
 521                                                            max_size,
 522                                                            VG_MEMORY_SYSTEM );
 523 }
 524
 525 VG_STATIC void world_audio_init(void)
 526 {
 527    u32 size = vg_linear_remaining( vg_audio.audio_pool )
 528                - sizeof(vg_linear_allocator);
 529
 530    world_global.audio_heap = vg_create_linear_allocator( vg_audio.audio_pool,
 531                                                          size,
 532                                                          VG_MEMORY_SYSTEM );
 533 }
 534
 535 VG_STATIC void world_trigger_achievement( world_instance *world, u32 uid )
 536 {
 537    struct logic_achievement *ach = &world->logic_achievements[ uid ];
 538
 539    if( ach->achieved )
 540       return;
 541
 542    steam_set_achievement( ach->achievement_id );
 543    steam_store_achievements();
 544
 545    ach->achieved = 1;
 546 }
 547
 548 VG_STATIC void world_run_relay( world_instance *world,
 549                                 struct relay_target *rt );
 550
 551 VG_STATIC void world_trigger_relay( world_instance *world, u32 uid )
 552 {
 553    struct logic_relay *relay = &world->logic_relays[ uid ];
 554
 555    for( int i=0; i<relay->target_count; i++ )
 556    {
 557       world_run_relay( world, &relay->targets[i] );
 558    }
 559 }
 560
 561 VG_STATIC void world_trigger_audio( world_instance *world, u32 uid )
 562 {
 563    struct world_audio_thing *wat = &world->audio_things[ uid ];
 564
 565    audio_lock();
 566    audio_player_playclip( &wat->player,
 567                           &wat->temp_embedded_clip );
 568    audio_unlock();
 569 }
 570
 571 VG_STATIC void world_run_relay( world_instance *world,
 572                                 struct relay_target *rt )
 573 {
 574    struct entity_instruction
 575    {
 576       enum classtype classtype;
 577       void (*p_trigger)( world_instance *world, u32 uid );
 578    }
 579    entity_instructions[] =
 580    {
 581       { k_classtype_logic_achievement, world_trigger_achievement },
 582       { k_classtype_logic_relay, world_trigger_relay },
 583       { k_classtype_audio, world_trigger_audio }
 584    };
 585
 586    for( int i=0; i<vg_list_size(entity_instructions); i++ )
 587    {
 588       struct entity_instruction *instr = &entity_instructions[i];
 589
 590       if( instr->classtype == rt->classtype )
 591       {
 592          instr->p_trigger( world, rt->sub_id );
 593          return;
 594       }
 595    }
 596
 597    vg_error( "Don't know how to trigger classtype %d\n", rt->classtype );
 598 }
 599
 600 VG_STATIC void world_update( world_instance *world, v3f pos )
 601 {
 602 #if 0
 603    if( world.switching_to_new_world )
 604    {
 605       int all_stopped = 1;
 606
 607       audio_lock();
 608       for( int i=0; i<world.audio_things_count; i++ )
 609       {
 610          struct world_audio_thing *at = &world.audio_things[i];
 611
 612          if( audio_player_is_playing( &at->player ) )
 613          {
 614             all_stopped = 0;
 615             break;
 616          }
 617       }
 618       audio_unlock();
 619
 620       if( all_stopped )
 621       {
 622          world.switching_to_new_world = 0;
 623          world_unload();
 624          vg_loader_start( world_load );
 625          return;
 626       }
 627    }
 628
 629    world.sky_time += world.sky_rate * vg.time_delta;
 630    world.sky_rate = vg_lerp( world.sky_rate, world.sky_target_rate,
 631                                  vg.time_delta * 5.0 );
 632 #endif
 633
 634    world_routes_update( world );
 635 #if 0
 636    world_routes_debug();
 637 #endif
 638
 639    if( world->route_count > 0 )
 640    {
 641       int closest = 0;
 642       float min_dist = INFINITY;
 643
 644       for( int i=0; i<world->route_count; i++ )
 645       {
 646          float d = v3_dist2( world->routes[i].scoreboard_transform[3], pos );
 647
 648          if( d < min_dist )
 649          {
 650             min_dist = d;
 651             closest = i;
 652          }
 653       }
 654
 655       if( (world_global.active_route_board != closest)
 656           || network_scores_updated )
 657       {
 658          network_scores_updated = 0;
 659          world_global.active_route_board = closest;
 660
 661          struct route *route = &world->routes[closest];
 662
 663          u32 id = route->track_id;
 664
 665          if( id != 0xffffffff )
 666          {
 667             struct netmsg_board *local_board =
 668                &scoreboard_client_data.boards[id];
 669
 670             for( int i=0; i<13; i++ )
 671             {
 672                sfd_encode( i, &local_board->data[27*i] );
 673             }
 674          }
 675       }
 676    }
 677
 678    int in_trigger = 0;
 679    for( int i=0; i<world->trigger_count; i++ )
 680    {
 681       struct trigger_zone *zone = &world->triggers[i];
 682
 683       v3f local;
 684       m4x3_mulv( zone->inv_transform, pos, local );
 685
 686       if( (fabsf(local[0]) <= 1.0f) &&
 687           (fabsf(local[1]) <= 1.0f) &&
 688           (fabsf(local[2]) <= 1.0f) )
 689       {
 690          in_trigger = 1;
 691
 692          if( !world_global.in_trigger )
 693          {
 694             world_run_relay( world, &zone->target );
 695          }
 696       }
 697
 698       vg_line_boxf_transformed( zone->transform, (boxf){{-1.0f,-1.0f,-1.0f},
 699                                                         { 1.0f, 1.0f, 1.0f}},
 700                                                         0xff00ff00 );
 701    }
 702
 703    for( int i=0; i<world->light_count; i++ )
 704    {
 705       struct world_light *light = &world->lights[i];
 706
 707       u32 colour = 0xff000000;
 708       u8 r = light->colour[0] * 255.0f,
 709          g = light->colour[1] * 255.0f,
 710          b = light->colour[2] * 255.0f;
 711
 712       colour |= r;
 713       colour |= g << 8;
 714       colour |= b << 16;
 715
 716       vg_line_pt3( light->co, 0.25f, colour );
 717    }
 718
 719    world_global.in_trigger = in_trigger;
 720    sfd_update();
 721 }
 722
 723 /*
 724  * -----------------------------------------------------------------------------
 725  *                              API implementation
 726  * -----------------------------------------------------------------------------
 727  */
 728
 729 VG_STATIC void ray_world_get_tri( world_instance *world,
 730                                   ray_hit *hit, v3f tri[3] )
 731 {
 732    for( int i=0; i<3; i++ )
 733       v3_copy( world->scene_geo->arrvertices[ hit->tri[i] ].co, tri[i] );
 734 }
 735
 736 VG_STATIC int ray_world( world_instance *world,
 737                          v3f pos, v3f dir, ray_hit *hit )
 738 {
 739    return scene_raycast( world->scene_geo, world->geo_bh, pos, dir, hit );
 740 }
 741
 742 /*
 743  * Cast a sphere from a to b and see what time it hits
 744  */
 745 VG_STATIC int spherecast_world( world_instance *world,
 746                                 v3f pa, v3f pb, float r, float *t, v3f n )
 747 {
 748    bh_iter it;
 749    bh_iter_init( 0, &it );
 750
 751    boxf region;
 752    box_init_inf( region );
 753    box_addpt( region, pa );
 754    box_addpt( region, pb );
 755
 756    v3_add( (v3f){ r, r, r}, region[1], region[1] );
 757    v3_add( (v3f){-r,-r,-r}, region[0], region[0] );
 758
 759    v3f dir;
 760    v3_sub( pb, pa, dir );
 761
 762    v3f dir_inv;
 763    dir_inv[0] = 1.0f/dir[0];
 764    dir_inv[1] = 1.0f/dir[1];
 765    dir_inv[2] = 1.0f/dir[2];
 766
 767    int hit = -1;
 768    float min_t = 1.0f;
 769
 770    int idx;
 771    while( bh_next( world->geo_bh, &it, region, &idx ) )
 772    {
 773       u32 *ptri = &world->scene_geo->arrindices[ idx*3 ];
 774       v3f tri[3];
 775
 776       boxf box;
 777       box_init_inf( box );
 778
 779       for( int j=0; j<3; j++ )
 780       {
 781          v3_copy( world->scene_geo->arrvertices[ptri[j]].co, tri[j] );
 782          box_addpt( box, tri[j] );
 783       }
 784
 785       v3_add( (v3f){ r, r, r}, box[1], box[1] );
 786       v3_add( (v3f){-r,-r,-r}, box[0], box[0] );
 787
 788       if( !ray_aabb1( box, pa, dir_inv, 1.0f ) )
 789          continue;
 790
 791       float t;
 792       v3f n1;
 793       if( spherecast_triangle( tri, pa, dir, r, &t, n1 ) )
 794       {
 795          if( t < min_t )
 796          {
 797             min_t = t;
 798             hit = idx;
 799             v3_copy( n1, n );
 800          }
 801       }
 802    }
 803
 804    *t = min_t;
 805    return hit;
 806 }
 807
 808 VG_STATIC
 809 struct world_material *world_tri_index_material( world_instance *world,
 810                                                  u32 index )
 811 {
 812    for( int i=1; i<world->material_count; i++ )
 813    {
 814       struct world_material *mat = &world->materials[i];
 815
 816       if( (index >= mat->sm_geo.vertex_start) &&
 817           (index  < mat->sm_geo.vertex_start+mat->sm_geo.vertex_count ) )
 818       {
 819          return mat;
 820       }
 821    }
 822
 823    /* error material */
 824    return &world->materials[0];
 825 }
 826
 827 VG_STATIC struct world_material *world_contact_material( world_instance *world,
 828                                                          rb_ct *ct )
 829 {
 830    return world_tri_index_material( world, ct->element_id );
 831 }
 832
 833 VG_STATIC struct world_material *ray_hit_material( world_instance *world,
 834                                                    ray_hit *hit )
 835 {
 836    return world_tri_index_material( world, hit->tri[0] );
 837 }
 838
 839 #endif /* WORLD_H */