world.h

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