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,   /* TODO: can probably remove these */
 255
 256                transport;
 257       }
 258       gate;
 259
 260       u32 node_id;
 261
 262       struct route_timing
 263       {
 264          u32 version; /* Incremented on every teleport */
 265          double time;
 266       }
 267       timing;
 268    }
 269    *gates;
 270    u32 gate_count;
 271
 272    struct nonlocal_gate
 273    {
 274       struct teleport_gate gate;
 275       mdl_node *node;
 276
 277       u32 target_map_index, working;
 278    }
 279    *nonlocal_gates;
 280    u32 nonlocalgate_count;
 281
 282    struct route_collector
 283    {
 284       struct route_timing timing;
 285    }
 286    *collectors;
 287    u32 collector_count;
 288
 289
 290    /* logic
 291     * ----------------------------------------------------
 292     */
 293
 294    /* world geometry */
 295    scene *scene_geo,
 296          *scene_no_collide,
 297          *scene_lines;
 298
 299    /* spacial mappings */
 300    bh_tree *audio_bh,
 301            *trigger_bh,
 302            *geo_bh;
 303
 304    /* graphics */
 305    glmesh mesh_route_lines;
 306    glmesh mesh_geo,
 307           mesh_no_collide,
 308           mesh_water;
 309
 310    rigidbody rb_geo; /* todo.. ... */
 311 };
 312
 313 VG_STATIC struct world_global
 314 {
 315    /*
 316     * Allocated as system memory
 317     * --------------------------------------------------------------------------
 318     */
 319    void *generic_heap,
 320         *audio_heap;  /* sub buffer of the audio buffer */
 321
 322    /* rendering */
 323    glmesh skydome;
 324    mdl_submesh dome_upper, dome_lower;
 325
 326    glmesh mesh_gate_surface;
 327
 328    double sky_time, sky_rate, sky_target_rate;
 329
 330    /* gates, TODO: active_gate should also know which instance */
 331    u32 active_gate,
 332        current_run_version;
 333    double time, rewind_from, rewind_to, last_use;
 334
 335    /* water rendering */
 336    struct
 337    {
 338       struct framebuffer fbreflect, fbdepth;
 339    }
 340    water;
 341
 342    /* split flap display */
 343    struct
 344    {
 345       mdl_submesh *sm_module, *sm_card;
 346       glmesh mesh_base, mesh_display;
 347
 348       u32 w, h;
 349       float *buffer;
 350    }
 351    sfd;
 352
 353    /* timing bars, fixed maximum amount */
 354    struct route_ui_bar
 355    {
 356       GLuint vao, vbo, ebo;
 357
 358       u32  indices_head;
 359       u32  vertex_head;
 360
 361       struct route_ui_segment
 362       {
 363          float length;
 364          u32 vertex_start, vertex_count,
 365              index_start, index_count, notches;
 366       }
 367       segments[k_max_ui_segments];
 368
 369       u32 segment_start, segment_count, fade_start, fade_count;
 370       double fade_timer_start;
 371       float xpos;
 372    }
 373    ui_bars[16];
 374
 375    v3f render_gate_pos;
 376    int active_route_board;
 377    int in_trigger;
 378
 379    int switching_to_new_world;
 380
 381    world_instance worlds[4];
 382    u32            world_count;
 383    u32            active_world;
 384 }
 385 world_global;
 386
 387 VG_STATIC world_instance *get_active_world( void )
 388 {
 389    return &world_global.worlds[ world_global.active_world ];
 390 }
 391
 392 /*
 393  * API
 394  */
 395
 396 VG_STATIC
 397 int ray_hit_is_ramp( world_instance *world, ray_hit *hit );
 398
 399 VG_STATIC
 400 struct world_material *ray_hit_material( world_instance *world, ray_hit *hit );
 401
 402 VG_STATIC
 403 void ray_world_get_tri( world_instance *world, ray_hit *hit, v3f tri[3] );
 404
 405 VG_STATIC
 406 int ray_world( world_instance *world, v3f pos, v3f dir, ray_hit *hit );
 407
 408 /*
 409  * Submodules
 410  */
 411
 412 #include "world_routes.h"
 413 #include "world_sfd.h"
 414 #include "world_render.h"
 415 #include "world_water.h"
 416 #include "world_gen.h"
 417 #include "world_gate.h"
 418
 419 /*
 420  * -----------------------------------------------------------------------------
 421  *                                    Events
 422  * -----------------------------------------------------------------------------
 423  */
 424
 425 VG_STATIC int world_stop_sound( int argc, const char *argv[] )
 426 {
 427    world_instance *world = get_active_world();
 428
 429    /*
 430     * None of our world audio runs as one shots, they always have a player.
 431     * Therefore it is safe to delete clip data after the players are
 432     * disconnected
 433     */
 434    audio_lock();
 435    for( int i=0; i<world->audio_things_count; i++ )
 436    {
 437       struct world_audio_thing *at = &world->audio_things[i];
 438
 439       if( audio_player_is_playing( &at->player ) )
 440       {
 441          u32 cflags = audio_player_get_flags( &at->player );
 442          audio_player_set_flags( &at->player, cflags | AUDIO_FLAG_KILL );
 443       }
 444    }
 445    audio_unlock();
 446
 447    return 0;
 448 }
 449
 450 VG_STATIC int world_change_world( int argc, const char *argv[] )
 451 {
 452 #if 0
 453    world_instance *world = get_active_world();
 454
 455    if( argc == 0 )
 456    {
 457       vg_info( "%s\n", world.world_name );
 458       return 0;
 459    }
 460    else
 461    {
 462       vg_info( "Switching world...\n" );
 463       strcpy( world.world_name, argv[0] );
 464       world.switching_to_new_world = 1;
 465       world_stop_sound( 0, NULL );
 466    }
 467 #endif
 468
 469    return 0;
 470 }
 471
 472 VG_STATIC void world_init(void)
 473 {
 474 #if 0
 475    vg_var_push( (struct vg_var){
 476       .name = "water_enable",
 477       .data = &world.water.enabled,
 478       .data_type = k_var_dtype_i32,
 479       .opt_i32 = { .min=0, .max=1, .clamp=1 },
 480       .persistent = 0
 481    });
 482 #endif
 483
 484         vg_function_push( (struct vg_cmd)
 485    {
 486                 .name = "world_stop_sound",
 487                 .function = world_stop_sound
 488         });
 489
 490         vg_function_push( (struct vg_cmd)
 491    {
 492                 .name = "world",
 493                 .function = world_change_world
 494         });
 495
 496    world_global.sky_rate = 1.0;
 497    world_global.sky_target_rate = 1.0;
 498
 499    shader_scene_standard_register();
 500    shader_scene_standard_alphatest_register();
 501    shader_scene_vertex_blend_register();
 502    shader_scene_terrain_register();
 503    shader_scene_depth_register();
 504
 505    shader_model_sky_register();
 506
 507    vg_info( "Loading world resources\n" );
 508
 509    vg_linear_clear( vg_mem.scratch );
 510    mdl_context *msky = mdl_load_full( vg_mem.scratch, "models/rs_skydome.mdl" );
 511
 512    mdl_node *nupper = mdl_node_from_name( msky, "dome_complete" );
 513    world_global.dome_upper = *mdl_node_submesh( msky, nupper, 0 );
 514
 515    vg_acquire_thread_sync();
 516    {
 517       mdl_unpack_glmesh( msky, &world_global.skydome );
 518    }
 519    vg_release_thread_sync();
 520
 521    /* Other systems */
 522    vg_info( "Loading other world systems\n" );
 523
 524    vg_loader_step( world_render_init, NULL );
 525    vg_loader_step( world_sfd_init, NULL );
 526    vg_loader_step( world_water_init, NULL );
 527    vg_loader_step( world_gates_init, NULL );
 528    vg_loader_step( world_routes_init, NULL );
 529
 530    /* Allocate dynamic world memory arena */
 531    u32 max_size = 76*1024*1024;
 532    world_global.generic_heap = vg_create_linear_allocator( vg_mem.rtmemory,
 533                                                            max_size,
 534                                                            VG_MEMORY_SYSTEM );
 535 }
 536
 537 VG_STATIC void world_audio_init(void)
 538 {
 539    u32 size = vg_linear_remaining( vg_audio.audio_pool )
 540                - sizeof(vg_linear_allocator);
 541
 542    world_global.audio_heap = vg_create_linear_allocator( vg_audio.audio_pool,
 543                                                          size,
 544                                                          VG_MEMORY_SYSTEM );
 545 }
 546
 547 VG_STATIC void world_trigger_achievement( world_instance *world, u32 uid )
 548 {
 549    struct logic_achievement *ach = &world->logic_achievements[ uid ];
 550
 551    if( ach->achieved )
 552       return;
 553
 554    steam_set_achievement( ach->achievement_id );
 555    steam_store_achievements();
 556
 557    ach->achieved = 1;
 558 }
 559
 560 VG_STATIC void world_run_relay( world_instance *world,
 561                                 struct relay_target *rt );
 562
 563 VG_STATIC void world_trigger_relay( world_instance *world, u32 uid )
 564 {
 565    struct logic_relay *relay = &world->logic_relays[ uid ];
 566
 567    for( int i=0; i<relay->target_count; i++ )
 568    {
 569       world_run_relay( world, &relay->targets[i] );
 570    }
 571 }
 572
 573 VG_STATIC void world_trigger_audio( world_instance *world, u32 uid )
 574 {
 575    struct world_audio_thing *wat = &world->audio_things[ uid ];
 576
 577    audio_lock();
 578    audio_player_playclip( &wat->player,
 579                           &wat->temp_embedded_clip );
 580    audio_unlock();
 581 }
 582
 583 VG_STATIC void world_run_relay( world_instance *world,
 584                                 struct relay_target *rt )
 585 {
 586    struct entity_instruction
 587    {
 588       enum classtype classtype;
 589       void (*p_trigger)( world_instance *world, u32 uid );
 590    }
 591    entity_instructions[] =
 592    {
 593       { k_classtype_logic_achievement, world_trigger_achievement },
 594       { k_classtype_logic_relay, world_trigger_relay },
 595       { k_classtype_audio, world_trigger_audio }
 596    };
 597
 598    for( int i=0; i<vg_list_size(entity_instructions); i++ )
 599    {
 600       struct entity_instruction *instr = &entity_instructions[i];
 601
 602       if( instr->classtype == rt->classtype )
 603       {
 604          instr->p_trigger( world, rt->sub_id );
 605          return;
 606       }
 607    }
 608
 609    vg_error( "Don't know how to trigger classtype %d\n", rt->classtype );
 610 }
 611
 612 VG_STATIC void world_update( world_instance *world, v3f pos )
 613 {
 614 #if 0
 615    if( world.switching_to_new_world )
 616    {
 617       int all_stopped = 1;
 618
 619       audio_lock();
 620       for( int i=0; i<world.audio_things_count; i++ )
 621       {
 622          struct world_audio_thing *at = &world.audio_things[i];
 623
 624          if( audio_player_is_playing( &at->player ) )
 625          {
 626             all_stopped = 0;
 627             break;
 628          }
 629       }
 630       audio_unlock();
 631
 632       if( all_stopped )
 633       {
 634          world.switching_to_new_world = 0;
 635          world_unload();
 636          vg_loader_start( world_load );
 637          return;
 638       }
 639    }
 640
 641    world.sky_time += world.sky_rate * vg.time_delta;
 642    world.sky_rate = vg_lerp( world.sky_rate, world.sky_target_rate,
 643                                  vg.time_delta * 5.0 );
 644 #endif
 645
 646    world_routes_update( world );
 647 #if 0
 648    world_routes_debug();
 649 #endif
 650
 651    if( world->route_count > 0 )
 652    {
 653       int closest = 0;
 654       float min_dist = INFINITY;
 655
 656       for( int i=0; i<world->route_count; i++ )
 657       {
 658          float d = v3_dist2( world->routes[i].scoreboard_transform[3], pos );
 659
 660          if( d < min_dist )
 661          {
 662             min_dist = d;
 663             closest = i;
 664          }
 665       }
 666
 667       if( (world_global.active_route_board != closest)
 668           || network_scores_updated )
 669       {
 670          network_scores_updated = 0;
 671          world_global.active_route_board = closest;
 672
 673          struct route *route = &world->routes[closest];
 674
 675          u32 id = route->track_id;
 676
 677          if( id != 0xffffffff )
 678          {
 679             struct netmsg_board *local_board =
 680                &scoreboard_client_data.boards[id];
 681
 682             for( int i=0; i<13; i++ )
 683             {
 684                sfd_encode( i, &local_board->data[27*i] );
 685             }
 686          }
 687       }
 688    }
 689
 690    int in_trigger = 0;
 691    for( int i=0; i<world->trigger_count; i++ )
 692    {
 693       struct trigger_zone *zone = &world->triggers[i];
 694
 695       v3f local;
 696       m4x3_mulv( zone->inv_transform, pos, local );
 697
 698       if( (fabsf(local[0]) <= 1.0f) &&
 699           (fabsf(local[1]) <= 1.0f) &&
 700           (fabsf(local[2]) <= 1.0f) )
 701       {
 702          in_trigger = 1;
 703
 704          if( !world_global.in_trigger )
 705          {
 706             world_run_relay( world, &zone->target );
 707          }
 708       }
 709
 710       vg_line_boxf_transformed( zone->transform, (boxf){{-1.0f,-1.0f,-1.0f},
 711                                                         { 1.0f, 1.0f, 1.0f}},
 712                                                         0xff00ff00 );
 713    }
 714
 715    for( int i=0; i<world->light_count; i++ )
 716    {
 717       struct world_light *light = &world->lights[i];
 718
 719       u32 colour = 0xff000000;
 720       u8 r = light->colour[0] * 255.0f,
 721          g = light->colour[1] * 255.0f,
 722          b = light->colour[2] * 255.0f;
 723
 724       colour |= r;
 725       colour |= g << 8;
 726       colour |= b << 16;
 727
 728       vg_line_pt3( light->co, 0.25f, colour );
 729    }
 730
 731    world_global.in_trigger = in_trigger;
 732    sfd_update();
 733 }
 734
 735 /*
 736  * -----------------------------------------------------------------------------
 737  *                              API implementation
 738  * -----------------------------------------------------------------------------
 739  */
 740
 741 VG_STATIC void ray_world_get_tri( world_instance *world,
 742                                   ray_hit *hit, v3f tri[3] )
 743 {
 744    for( int i=0; i<3; i++ )
 745       v3_copy( world->scene_geo->arrvertices[ hit->tri[i] ].co, tri[i] );
 746 }
 747
 748 VG_STATIC int ray_world( world_instance *world,
 749                          v3f pos, v3f dir, ray_hit *hit )
 750 {
 751    return scene_raycast( world->scene_geo, world->geo_bh, pos, dir, hit );
 752 }
 753
 754 /*
 755  * Cast a sphere from a to b and see what time it hits
 756  */
 757 VG_STATIC int spherecast_world( world_instance *world,
 758                                 v3f pa, v3f pb, float r, float *t, v3f n )
 759 {
 760    bh_iter it;
 761    bh_iter_init( 0, &it );
 762
 763    boxf region;
 764    box_init_inf( region );
 765    box_addpt( region, pa );
 766    box_addpt( region, pb );
 767
 768    v3_add( (v3f){ r, r, r}, region[1], region[1] );
 769    v3_add( (v3f){-r,-r,-r}, region[0], region[0] );
 770
 771    v3f dir;
 772    v3_sub( pb, pa, dir );
 773
 774    v3f dir_inv;
 775    dir_inv[0] = 1.0f/dir[0];
 776    dir_inv[1] = 1.0f/dir[1];
 777    dir_inv[2] = 1.0f/dir[2];
 778
 779    int hit = -1;
 780    float min_t = 1.0f;
 781
 782    int idx;
 783    while( bh_next( world->geo_bh, &it, region, &idx ) )
 784    {
 785       u32 *ptri = &world->scene_geo->arrindices[ idx*3 ];
 786       v3f tri[3];
 787
 788       boxf box;
 789       box_init_inf( box );
 790
 791       for( int j=0; j<3; j++ )
 792       {
 793          v3_copy( world->scene_geo->arrvertices[ptri[j]].co, tri[j] );
 794          box_addpt( box, tri[j] );
 795       }
 796
 797       v3_add( (v3f){ r, r, r}, box[1], box[1] );
 798       v3_add( (v3f){-r,-r,-r}, box[0], box[0] );
 799
 800       if( !ray_aabb1( box, pa, dir_inv, 1.0f ) )
 801          continue;
 802
 803       float t;
 804       v3f n1;
 805       if( spherecast_triangle( tri, pa, dir, r, &t, n1 ) )
 806       {
 807          if( t < min_t )
 808          {
 809             min_t = t;
 810             hit = idx;
 811             v3_copy( n1, n );
 812          }
 813       }
 814    }
 815
 816    *t = min_t;
 817    return hit;
 818 }
 819
 820 VG_STATIC
 821 struct world_material *world_tri_index_material( world_instance *world,
 822                                                  u32 index )
 823 {
 824    for( int i=1; i<world->material_count; i++ )
 825    {
 826       struct world_material *mat = &world->materials[i];
 827
 828       if( (index >= mat->sm_geo.vertex_start) &&
 829           (index  < mat->sm_geo.vertex_start+mat->sm_geo.vertex_count ) )
 830       {
 831          return mat;
 832       }
 833    }
 834
 835    /* error material */
 836    return &world->materials[0];
 837 }
 838
 839 VG_STATIC struct world_material *world_contact_material( world_instance *world,
 840                                                          rb_ct *ct )
 841 {
 842    return world_tri_index_material( world, ct->element_id );
 843 }
 844
 845 VG_STATIC struct world_material *ray_hit_material( world_instance *world,
 846                                                    ray_hit *hit )
 847 {
 848    return world_tri_index_material( world, hit->tri[0] );
 849 }
 850
 851 #endif /* WORLD_H */