world_entity.c

   1 #include "vg/vg_steam.h"
   2 #include "vg/vg_steam_user_stats.h"
   3 #include "model.h"
   4 #include "entity.h"
   5 #include "world.h"
   6 #include "world_load.h"
   7 #include "save.h"
   8 #include "vg/vg_msg.h"
   9 #include "menu.h"
  10 #include "ent_challenge.h"
  11 #include "ent_skateshop.h"
  12 #include "ent_route.h"
  13 #include "ent_traffic.h"
  14 #include "ent_glider.h"
  15 #include "ent_region.h"
  16 #include "ent_npc.h"
  17 #include "input.h"
  18 #include "player_walk.h"
  19
  20 bh_system bh_system_entity_list =
  21 {
  22    .expand_bound = entity_bh_expand_bound,
  23    .item_centroid = entity_bh_centroid,
  24    .item_closest = entity_bh_closest,
  25    .item_swap = entity_bh_swap,
  26    .item_debug = entity_bh_debug,
  27    .cast_ray = NULL
  28 };
  29
  30 void world_entity_set_focus( u32 entity_id )
  31 {
  32    if( world_static.focused_entity )
  33    {
  34       vg_warn( "Entity %u#%u tried to take focus from %u#%u\n",
  35                   mdl_entity_id_type( entity_id ),
  36                   mdl_entity_id_id( entity_id ),
  37                   mdl_entity_id_type( world_static.focused_entity ),
  38                   mdl_entity_id_id( world_static.focused_entity ) );
  39       return;
  40    }
  41
  42    world_static.focused_entity = entity_id;
  43 }
  44
  45 void world_entity_focus_modal(void)
  46 {
  47    localplayer.immobile = 1;
  48    menu.disable_open = 1;
  49    srinput.state = k_input_state_resume;
  50
  51    v3_zero( localplayer.rb.v );
  52    v3_zero( localplayer.rb.w );
  53    player_walk.move_speed = 0.0f;
  54    skaterift.activity = k_skaterift_ent_focus;
  55 }
  56
  57 void world_entity_exit_modal(void)
  58 {
  59    if( skaterift.activity != k_skaterift_ent_focus )
  60    {
  61       vg_warn( "Entity %u#%u tried to exit modal when we weren't in one\n",
  62                   mdl_entity_id_type( world_static.focused_entity ),
  63                   mdl_entity_id_id( world_static.focused_entity ) );
  64       return;
  65    }
  66
  67    localplayer.immobile = 0;
  68    menu.disable_open = 0;
  69    srinput.state = k_input_state_resume;
  70    skaterift.activity = k_skaterift_default;
  71 }
  72
  73 void world_entity_clear_focus(void)
  74 {
  75    if( skaterift.activity == k_skaterift_ent_focus )
  76    {
  77       vg_warn( "Entity %u#%u tried to clear focus before exiting modal\n",
  78                   mdl_entity_id_type( world_static.focused_entity ),
  79                   mdl_entity_id_id( world_static.focused_entity ) );
  80       return;
  81    }
  82
  83    world_static.focused_entity = 0;
  84 }
  85
  86 void world_entity_focus_camera( world_instance *world, u32 uid )
  87 {
  88    if( mdl_entity_id_type( uid ) == k_ent_camera ){
  89       u32 index = mdl_entity_id_id( uid );
  90       ent_camera *cam = mdl_arritm( &world->ent_camera, index );
  91
  92       v3f dir = {0.0f,-1.0f,0.0f};
  93       mdl_transform_vector( &cam->transform, dir, dir );
  94       v3_angles( dir, world_static.focus_cam.angles );
  95       v3_copy( cam->transform.co, world_static.focus_cam.pos );
  96       world_static.focus_cam.fov = cam->fov;
  97    }
  98    else {
  99       vg_camera_copy( &localplayer.cam, &world_static.focus_cam );
 100
 101       /* TODO ? */
 102       world_static.focus_cam.nearz = localplayer.cam.nearz;
 103       world_static.focus_cam.farz = localplayer.cam.farz;
 104    }
 105 }
 106
 107 /* logic preupdate */
 108 void world_entity_focus_preupdate(void)
 109 {
 110    f32 rate = vg_minf( 1.0f, vg.time_frame_delta * 2.0f );
 111    int active = 0;
 112    if( skaterift.activity == k_skaterift_ent_focus )
 113       active = 1;
 114
 115    vg_slewf( &world_static.focus_strength, active,
 116              vg.time_frame_delta * (1.0f/0.5f) );
 117
 118    u32 type = mdl_entity_id_type( world_static.focused_entity ),
 119        index = mdl_entity_id_id( world_static.focused_entity );
 120    world_instance *world = world_current_instance();
 121
 122    /* TODO: Table. */
 123    if( type == k_ent_skateshop )
 124    {
 125       ent_skateshop *skateshop = mdl_arritm( &world->ent_skateshop, index );
 126       ent_skateshop_preupdate( skateshop, active );
 127    }
 128    else if( type == k_ent_challenge )
 129    {
 130       ent_challenge *challenge = mdl_arritm( &world->ent_challenge, index );
 131       ent_challenge_preupdate( challenge, active );
 132    }
 133    else if( type == k_ent_route )
 134    {
 135       ent_route *route = mdl_arritm( &world->ent_route, index );
 136       ent_route_preupdate( route, active );
 137    }
 138    else if( type == k_ent_npc )
 139    {
 140       ent_npc *npc = mdl_arritm( &world->ent_npc, index );
 141       ent_npc_preupdate( npc, active );
 142    }
 143 }
 144
 145 /* additional renderings like text etc.. */
 146 void world_entity_focus_render(void)
 147 {
 148    world_instance *world = world_current_instance();
 149    if( skaterift.activity != k_skaterift_ent_focus ){
 150       skateshop_render_nonfocused( world, &skaterift.cam );
 151       return;
 152    }
 153
 154    u32 type = mdl_entity_id_type( world_static.focused_entity ),
 155        index = mdl_entity_id_id( world_static.focused_entity );
 156
 157    if( type == k_ent_skateshop ){
 158       ent_skateshop *skateshop = mdl_arritm( &world->ent_skateshop, index );
 159       skateshop_render( skateshop );
 160    }
 161    else if( type == k_ent_challenge ){}
 162    else if( type == k_ent_route ){}
 163    else if( type == k_ent_miniworld ){}
 164    else if( type == k_ent_npc ){}
 165    else {
 166       vg_fatal_error( "Programming error\n" );
 167    }
 168 }
 169
 170 void world_gen_entities_init( world_instance *world )
 171 {
 172    /* lights */
 173    for( u32 j=0; j<mdl_arrcount(&world->ent_light); j ++ ){
 174       ent_light *light = mdl_arritm( &world->ent_light, j );
 175
 176       m4x3f to_world;
 177       q_m3x3( light->transform.q, to_world );
 178       v3_copy( light->transform.co, to_world[3] );
 179       m4x3_invert_affine( to_world, light->inverse_world );
 180
 181       light->angle_sin_cos[0] = sinf( light->angle * 0.5f );
 182       light->angle_sin_cos[1] = cosf( light->angle * 0.5f );
 183    }
 184
 185    /* gates */
 186    for( u32 j=0; j<mdl_arrcount(&world->ent_gate); j ++ ){
 187       ent_gate *gate = mdl_arritm( &world->ent_gate, j );
 188
 189       if( !(gate->flags & k_ent_gate_nonlocal) ) {
 190          gate_transform_update( gate );
 191       }
 192    }
 193
 194    vg_async_call( world_link_nonlocal_async, world, 0 );
 195
 196    /* water */
 197    for( u32 j=0; j<mdl_arrcount(&world->ent_water); j++ ){
 198       ent_water *water = mdl_arritm( &world->ent_water, j );
 199       if( world->water.enabled ){
 200          vg_warn( "Multiple water surfaces in level!\n" );
 201          break;
 202       }
 203
 204       world->water.enabled = 1;
 205       water_set_surface( world, water->transform.co[1] );
 206    }
 207
 208    /* volumes */
 209    for( u32 j=0; j<mdl_arrcount(&world->ent_volume); j++ ){
 210       ent_volume *volume = mdl_arritm( &world->ent_volume, j );
 211       mdl_transform_m4x3( &volume->transform, volume->to_world );
 212       m4x3_invert_full( volume->to_world, volume->to_local );
 213    }
 214
 215    /* audio packs */
 216    for( u32 j=0; j<mdl_arrcount(&world->ent_audio); j++ ){
 217       ent_audio *audio = mdl_arritm( &world->ent_audio, j );
 218
 219       for( u32 k=0; k<audio->clip_count; k++ ){
 220          ent_audio_clip *clip = mdl_arritm( &world->ent_audio_clip,
 221                                              audio->clip_start+k );
 222
 223          if( clip->_.file.pack_size ){
 224             u32 size = clip->_.file.pack_size,
 225                 offset = clip->_.file.pack_offset;
 226
 227             /* embedded files are fine to clear the scratch buffer, only
 228              * external audio uses it */
 229
 230             vg_linear_clear( vg_mem.scratch );
 231             void *data = vg_linear_alloc( vg_mem.scratch,
 232                                           clip->_.file.pack_size );
 233
 234             mdl_fread_pack_file( &world->meta, &clip->_.file, data );
 235
 236             clip->_.clip.path = NULL;
 237             clip->_.clip.flags = audio->flags;
 238             clip->_.clip.data = data;
 239             clip->_.clip.size = size;
 240          }
 241          else{
 242             clip->_.clip.path = mdl_pstr(&world->meta,clip->_.file.pstr_path);
 243             clip->_.clip.flags = audio->flags;
 244             clip->_.clip.data = NULL;
 245             clip->_.clip.size = 0;
 246          }
 247
 248          audio_clip_load( &clip->_.clip, world->heap );
 249       }
 250    }
 251
 252    /* create generic entity hierachy for those who need it */
 253    u32 indexed_count = 0;
 254    struct {
 255       u32 type;
 256       mdl_array_ptr *array;
 257    }
 258    indexables[] = {
 259       { k_ent_gate, &world->ent_gate },
 260       { k_ent_objective, &world->ent_objective },
 261       { k_ent_volume, &world->ent_volume },
 262       { k_ent_challenge, &world->ent_challenge },
 263       { k_ent_glider, &world->ent_glider },
 264       { k_ent_npc, &world->ent_npc }
 265    };
 266
 267    for( u32 i=0; i<vg_list_size(indexables); i++ )
 268       indexed_count += mdl_arrcount( indexables[i].array );
 269    vg_info( "indexing %u entities\n", indexed_count );
 270
 271    world->entity_list = vg_linear_alloc( world->heap,
 272                                          vg_align8(indexed_count*sizeof(u32)));
 273
 274    u32 index=0;
 275    for( u32 i=0; i<vg_list_size(indexables); i++ ){
 276       u32 type  = indexables[i].type,
 277           count = mdl_arrcount( indexables[i].array );
 278
 279       for( u32 j=0; j<count; j ++ )
 280          world->entity_list[index ++] = mdl_entity_id( type, j );
 281    }
 282
 283    world->entity_bh = bh_create( world->heap, &bh_system_entity_list, world,
 284                                  indexed_count, 2 );
 285
 286    world->tar_min = world->entity_bh->nodes[0].bbx[0][1];
 287    world->tar_max = world->entity_bh->nodes[0].bbx[1][1] + 20.0f;
 288
 289    for( u32 i=0; i<mdl_arrcount(&world->ent_marker); i++ ){
 290       ent_marker *marker = mdl_arritm( &world->ent_marker, i );
 291
 292       if( MDL_CONST_PSTREQ( &world->meta, marker->pstr_alias, "tar_min" ) )
 293          world->tar_min = marker->transform.co[1];
 294
 295       if( MDL_CONST_PSTREQ( &world->meta, marker->pstr_alias, "tar_max" ) )
 296          world->tar_max = marker->transform.co[1];
 297    }
 298 }
 299
 300 ent_spawn *world_find_closest_spawn( world_instance *world, v3f position )
 301 {
 302    ent_spawn *rp = NULL, *r;
 303    float min_dist = INFINITY;
 304
 305    for( u32 i=0; i<mdl_arrcount(&world->ent_spawn); i++ ){
 306       r = mdl_arritm( &world->ent_spawn, i );
 307       float d = v3_dist2( r->transform.co, position );
 308
 309       if( d < min_dist ){
 310          min_dist = d;
 311          rp = r;
 312       }
 313    }
 314
 315    if( !rp ){
 316       if( mdl_arrcount(&world->ent_spawn) ){
 317          vg_warn( "Invalid distances to spawns.. defaulting to first one.\n" );
 318          return mdl_arritm( &world->ent_spawn, 0 );
 319       }
 320       else{
 321          vg_error( "There are no spawns in the level!\n" );
 322       }
 323    }
 324
 325    return rp;
 326 }
 327
 328 ent_spawn *world_find_spawn_by_name( world_instance *world, const char *name )
 329 {
 330    ent_spawn *rp = NULL, *r;
 331    for( u32 i=0; i<mdl_arrcount(&world->ent_spawn); i++ ){
 332       r = mdl_arritm( &world->ent_spawn, i );
 333       if( !strcmp( mdl_pstr(&world->meta, r->pstr_name), name ) ){
 334          rp = r;
 335          break;
 336       }
 337    }
 338
 339    if( !rp )
 340       vg_warn( "No spawn named '%s'\n", name );
 341
 342    return rp;
 343 }
 344
 345 void world_default_spawn_pos( world_instance *world, v3f pos )
 346 {
 347    ent_spawn *rp = world_find_spawn_by_name( world, "start" );
 348    if( !rp ) rp = world_find_closest_spawn( world, (v3f){0,0,0} );
 349    if( rp )
 350       v3_copy( rp->transform.co, pos );
 351    else
 352    {
 353       vg_error( "There are no valid spawns in the world\n" );
 354       v3_zero( pos );
 355    }
 356 }
 357
 358 void ent_volume_call( world_instance *world, ent_call *call )
 359 {
 360    u32 index = mdl_entity_id_id( call->id );
 361    ent_volume *volume = mdl_arritm( &world->ent_volume, index );
 362    if( !volume->target ) return;
 363
 364    if( call->function == k_ent_function_trigger ){
 365       call->id = volume->target;
 366
 367       if( volume->flags & k_ent_volume_flag_particles ){
 368          float *co = alloca( sizeof(float)*3 );
 369          co[0] = vg_randf64(&vg.rand)*2.0f-1.0f;
 370          co[1] = vg_randf64(&vg.rand)*2.0f-1.0f;
 371          co[2] = vg_randf64(&vg.rand)*2.0f-1.0f;
 372          m4x3_mulv( volume->to_world, co, co );
 373
 374          call->function = k_ent_function_particle_spawn;
 375          call->data = co;
 376          entity_call( world, call );
 377       }
 378       else{
 379          call->function = volume->trigger.event;
 380          entity_call( world, call );
 381       }
 382    }
 383    else if( call->function == k_ent_function_trigger_leave ){
 384       call->id = volume->target;
 385
 386       if( volume->flags & k_ent_volume_flag_particles ){
 387          vg_warn( "Invalid condition; calling leave on particle volume.\n" );
 388       }
 389       else{
 390          call->function = volume->trigger.event_leave;
 391          entity_call( world, call );
 392       }
 393    }
 394 }
 395
 396 void ent_audio_call( world_instance *world, ent_call *call )
 397 {
 398    if( world->status == k_world_status_unloading ){
 399       vg_warn( "cannot modify audio while unloading world\n" );
 400       return;
 401    }
 402
 403    u8 world_id = (world - world_static.instances) + 1;
 404    u32 index = mdl_entity_id_id( call->id );
 405    ent_audio *audio = mdl_arritm( &world->ent_audio, index );
 406
 407    v3f sound_co;
 408
 409    if( call->function == k_ent_function_particle_spawn ){
 410       v3_copy( call->data, sound_co );
 411    }
 412    else if( call->function == k_ent_function_trigger ){
 413       v3_copy( audio->transform.co, sound_co );
 414    }
 415    else
 416       return;
 417
 418    float chance = vg_randf64(&vg.rand)*100.0f,
 419          bar = 0.0f;
 420
 421    for( u32 i=0; i<audio->clip_count; i++ ){
 422       ent_audio_clip *clip = mdl_arritm( &world->ent_audio_clip,
 423                                           audio->clip_start+i );
 424
 425       float mod = world->probabilities[ audio->probability_curve ],
 426             p   = clip->probability * mod;
 427
 428       bar += p;
 429       if( chance < bar )
 430       {
 431          audio_lock();
 432
 433          if( audio->behaviour == k_channel_behaviour_unlimited )
 434          {
 435             audio_oneshot_3d( &clip->_.clip, sound_co,
 436                               audio->transform.s[0],
 437                               audio->volume );
 438          }
 439          else if( audio->behaviour == k_channel_behaviour_discard_if_full )
 440          {
 441             audio_channel *ch =
 442                audio_get_group_idle_channel( audio->group,
 443                                              audio->max_channels );
 444
 445             if( ch )
 446             {
 447                audio_channel_init( ch, &clip->_.clip, audio->flags );
 448                audio_channel_group( ch, audio->group );
 449                audio_channel_world( ch, world_id );
 450                audio_channel_set_spacial( ch, sound_co, audio->transform.s[0] );
 451                audio_channel_edit_volume( ch, audio->volume, 1 );
 452                ch = audio_relinquish_channel( ch );
 453             }
 454          }
 455          else if( audio->behaviour == k_channel_behaviour_crossfade_if_full)
 456          {
 457             audio_channel *ch =
 458                audio_get_group_idle_channel( audio->group,
 459                                              audio->max_channels );
 460
 461             /* group is full */
 462             if( !ch ){
 463                audio_channel *existing =
 464                   audio_get_group_first_active_channel( audio->group );
 465
 466                if( existing ){
 467                   if( existing->source == &clip->_.clip ){
 468                      audio_unlock();
 469                      return;
 470                   }
 471
 472                   existing->group = 0;
 473                   existing = audio_channel_fadeout(existing, audio->crossfade);
 474                }
 475
 476                ch = audio_get_first_idle_channel();
 477             }
 478
 479             if( ch )
 480             {
 481                audio_channel_init( ch, &clip->_.clip, audio->flags );
 482                audio_channel_group( ch, audio->group );
 483                audio_channel_world( ch, world_id );
 484                audio_channel_fadein( ch, audio->crossfade );
 485                ch = audio_relinquish_channel( ch );
 486             }
 487          }
 488
 489          audio_unlock();
 490          return;
 491       }
 492    }
 493 }
 494
 495
 496 void ent_ccmd_call( world_instance *world, ent_call *call )
 497 {
 498    if( call->function == k_ent_function_trigger ){
 499       u32 index = mdl_entity_id_id( call->id );
 500       ent_ccmd *ccmd = mdl_arritm( &world->ent_ccmd, index );
 501       vg_execute_console_input( mdl_pstr(&world->meta, ccmd->pstr_command),
 502                                 0 );
 503    }
 504 }
 505
 506 /*
 507  * BVH implementation
 508  * ----------------------------------------------------------------------------
 509  */
 510
 511 void entity_bh_expand_bound( void *user, boxf bound, u32 item_index )
 512 {
 513    world_instance *world = user;
 514
 515    u32 id    = world->entity_list[ item_index ],
 516        type  = mdl_entity_id_type( id ),
 517        index = mdl_entity_id_id( id );
 518
 519    if( type == k_ent_gate ){
 520       ent_gate *gate = mdl_arritm( &world->ent_gate, index );
 521       boxf box = {{ -gate->dimensions[0], -gate->dimensions[1], -0.1f },
 522                   {  gate->dimensions[0],  gate->dimensions[1],  0.1f }};
 523
 524       m4x3_expand_aabb_aabb( gate->to_world, bound, box );
 525    }
 526    else if( type == k_ent_objective ){
 527       ent_objective *objective = mdl_arritm( &world->ent_objective, index );
 528
 529       /* TODO: This might be more work than necessary. could maybe just get
 530        *       away with representing them as points */
 531
 532       boxf box;
 533       box_init_inf( box );
 534
 535       for( u32 i=0; i<objective->submesh_count; i++ ){
 536          mdl_submesh *sm = mdl_arritm( &world->meta.submeshs,
 537                                        objective->submesh_start+i );
 538          box_concat( box, sm->bbx );
 539       }
 540
 541       m4x3f transform;
 542       mdl_transform_m4x3( &objective->transform, transform );
 543       m4x3_expand_aabb_aabb( transform, bound, box );
 544    }
 545    else if( type == k_ent_volume ){
 546       ent_volume *volume = mdl_arritm( &world->ent_volume, index );
 547       m4x3_expand_aabb_aabb( volume->to_world, bound,
 548                               (boxf){{-1.0f,-1.0f,-1.0f},{ 1.0f, 1.0f, 1.0f}} );
 549    }
 550    else if( type == k_ent_challenge ){
 551       ent_challenge *challenge = mdl_arritm( &world->ent_challenge, index );
 552
 553       boxf box = {{-1.2f*0.5f,-0.72f*0.5f,-0.01f*0.5f},
 554                   { 1.2f*0.5f, 0.72f*0.5f, 0.01f*0.5f}};
 555       m4x3f transform;
 556       mdl_transform_m4x3( &challenge->transform, transform );
 557       m4x3_expand_aabb_aabb( transform, bound, box );
 558    }
 559    else if( type == k_ent_glider ){
 560       ent_glider *glider = mdl_arritm( &world->ent_glider, index );
 561       m4x3f transform;
 562       mdl_transform_m4x3( &glider->transform, transform );
 563       m4x3_expand_aabb_aabb( transform, bound,
 564                             (boxf){{-1.0f,-1.0f,-1.0f},{ 1.0f, 1.0f, 1.0f}} );
 565    }
 566    else if( type == k_ent_npc )
 567    {
 568       ent_npc *npc = mdl_arritm( &world->ent_npc, index );
 569       box_addpt( bound, npc->transform.co );
 570    }
 571    else{
 572       vg_fatal_error( "Programming error\n" );
 573    }
 574 }
 575
 576 float entity_bh_centroid( void *user, u32 item_index, int axis )
 577 {
 578    world_instance *world = user;
 579
 580    u32 id    = world->entity_list[ item_index ],
 581        type  = mdl_entity_id_type( id ),
 582        index = mdl_entity_id_id( id );
 583
 584    if( type == k_ent_gate ){
 585       ent_gate *gate = mdl_arritm( &world->ent_gate, index );
 586       return gate->to_world[3][axis];
 587    }
 588    else if( type == k_ent_objective ){
 589       ent_objective *objective = mdl_arritm( &world->ent_objective, index );
 590       return objective->transform.co[axis];
 591    }
 592    else if( type == k_ent_volume ){
 593       ent_volume *volume = mdl_arritm( &world->ent_volume, index );
 594       return volume->transform.co[axis];
 595    }
 596    else if( type == k_ent_challenge )
 597    {
 598       ent_challenge *challenge = mdl_arritm( &world->ent_challenge, index );
 599       return challenge->transform.co[axis];
 600    }
 601    else if( type == k_ent_glider )
 602    {
 603       ent_glider *glider = mdl_arritm( &world->ent_glider, index );
 604       return glider->transform.co[axis];
 605    }
 606    else if( type == k_ent_npc )
 607    {
 608       ent_npc *npc = mdl_arritm( &world->ent_npc, index );
 609       return npc->transform.co[axis];
 610    }
 611    else
 612    {
 613       vg_fatal_error( "Programming error\n" );
 614       return INFINITY;
 615    }
 616 }
 617
 618 void entity_bh_swap( void *user, u32 ia, u32 ib )
 619 {
 620    world_instance *world = user;
 621
 622    u32 a = world->entity_list[ ia ],
 623        b = world->entity_list[ ib ];
 624
 625    world->entity_list[ ia ] = b;
 626    world->entity_list[ ib ] = a;
 627 }
 628
 629 void entity_bh_debug( void *user, u32 item_index ){
 630    world_instance *world = user;
 631
 632    u32 id    = world->entity_list[ item_index ],
 633        type  = mdl_entity_id_type( id ),
 634        index = mdl_entity_id_id( id );
 635
 636    if( type == k_ent_gate ){
 637       ent_gate *gate = mdl_arritm( &world->ent_gate, index );
 638       boxf box = {{ -gate->dimensions[0], -gate->dimensions[1], -0.1f },
 639                   {  gate->dimensions[0],  gate->dimensions[1],  0.1f }};
 640       vg_line_boxf_transformed( gate->to_world, box, 0xf000ff00 );
 641    }
 642    else if( type == k_ent_objective ){
 643       ent_objective *objective = mdl_arritm( &world->ent_objective, index );
 644       boxf box;
 645       box_init_inf( box );
 646
 647       for( u32 i=0; i<objective->submesh_count; i++ ){
 648          mdl_submesh *sm = mdl_arritm( &world->meta.submeshs,
 649                                        objective->submesh_start+i );
 650          box_concat( box, sm->bbx );
 651       }
 652
 653       m4x3f transform;
 654       mdl_transform_m4x3( &objective->transform, transform );
 655       vg_line_boxf_transformed( transform, box, 0xf000ff00 );
 656    }
 657    else if( type == k_ent_volume ){
 658       ent_volume *volume = mdl_arritm( &world->ent_volume, index );
 659       vg_line_boxf_transformed( volume->to_world,
 660                                 (boxf){{-1.0f,-1.0f,-1.0f},{ 1.0f, 1.0f, 1.0f}},
 661                                 0xf000ff00 );
 662    }
 663    else if( type == k_ent_challenge ){
 664       ent_challenge *challenge = mdl_arritm( &world->ent_challenge, index );
 665
 666       boxf box = {{-1.2f*0.5f,-0.72f*0.5f,-0.01f*0.5f},
 667                   { 1.2f*0.5f, 0.72f*0.5f, 0.01f*0.5f}};
 668       m4x3f transform;
 669       mdl_transform_m4x3( &challenge->transform, transform );
 670       vg_line_boxf_transformed( transform, box, 0xf0ff0000 );
 671    }
 672    else{
 673       vg_fatal_error( "Programming error\n" );
 674    }
 675 }
 676
 677 void update_ach_models(void)
 678 {
 679    world_instance *hub = &world_static.instances[k_world_purpose_hub];
 680    if( hub->status != k_world_status_loaded ) return;
 681
 682    for( u32 i=0; i<mdl_arrcount( &hub->ent_prop ); i ++ ){
 683       ent_prop *prop = mdl_arritm( &hub->ent_prop, i );
 684       if( prop->flags & 0x2 ){
 685          if( MDL_CONST_PSTREQ( &hub->meta, prop->pstr_alias, "MARC" ) )
 686             if( skaterift.achievements & 0x1 )
 687                prop->flags &= ~0x1;
 688          if( MDL_CONST_PSTREQ( &hub->meta, prop->pstr_alias, "ALBERT" ) )
 689             if( skaterift.achievements & 0x2 )
 690                prop->flags &= ~0x1;
 691          if( MDL_CONST_PSTREQ( &hub->meta, prop->pstr_alias, "JANET" ) )
 692             if( skaterift.achievements & 0x4 )
 693                prop->flags &= ~0x1;
 694          if( MDL_CONST_PSTREQ( &hub->meta, prop->pstr_alias, "BERNADETTA" ) )
 695             if( skaterift.achievements & 0x8 )
 696                prop->flags &= ~0x1;
 697       }
 698    }
 699 }
 700
 701 void entity_bh_closest( void *user, u32 item_index, v3f point, v3f closest )
 702 {
 703    world_instance *world = user;
 704
 705    u32 id    = world->entity_list[ item_index ],
 706        type  = mdl_entity_id_type( id ),
 707        index = mdl_entity_id_id( id );
 708
 709    if( type == k_ent_gate ){
 710       ent_gate *gate = mdl_arritm( &world->ent_gate, index );
 711       v3_copy( gate->to_world[3], closest );
 712    }
 713    else if( type == k_ent_objective ){
 714       ent_objective *challenge = mdl_arritm( &world->ent_objective, index );
 715       v3_copy( challenge->transform.co, closest );
 716    }
 717    else if( type == k_ent_volume ){
 718       ent_volume *volume = mdl_arritm( &world->ent_volume, index );
 719       v3_copy( volume->to_world[3], closest );
 720    }
 721    else if( type == k_ent_challenge ){
 722       ent_challenge *challenge = mdl_arritm( &world->ent_challenge, index );
 723       v3_copy( challenge->transform.co, closest );
 724    }
 725    else{
 726       vg_fatal_error( "Programming error\n" );
 727    }
 728 }
 729
 730 void world_entity_start( world_instance *world, vg_msg *sav )
 731 {
 732    vg_info( "Start instance %p\n", world );
 733
 734    world->probabilities[ k_probability_curve_constant ] = 1.0f;
 735    for( u32 i=0; i<mdl_arrcount(&world->ent_audio); i++ )
 736    {
 737       ent_audio *audio = mdl_arritm(&world->ent_audio,i);
 738       if( audio->flags & AUDIO_FLAG_AUTO_START )
 739       {
 740          ent_call call;
 741          call.data = NULL;
 742          call.function = k_ent_function_trigger;
 743          call.id = mdl_entity_id( k_ent_audio, i );
 744          entity_call( world, &call );
 745       }
 746    }
 747
 748    /* read savedata
 749     * ----------------------------------------------------------------------- */
 750
 751    for( u32 i=0; i<mdl_arrcount(&world->ent_challenge); i++ ){
 752       ent_challenge *challenge = mdl_arritm( &world->ent_challenge, i );
 753       const char *alias = mdl_pstr( &world->meta, challenge->pstr_alias );
 754
 755       u32 result;
 756       vg_msg_getkvintg( sav, alias, k_vg_msg_u32, &result );
 757
 758       if( result ){
 759          ent_call call;
 760          call.data = NULL;
 761          call.function = 0;
 762          call.id = mdl_entity_id( k_ent_challenge, i );
 763          entity_call( world, &call );
 764       }
 765    }
 766
 767    vg_msg routes_block = *sav;
 768    if( vg_msg_seekframe( &routes_block, "routes" ) ){
 769       for( u32 i=0; i<mdl_arrcount(&world->ent_route); i++ ){
 770          ent_route *route = mdl_arritm( &world->ent_route, i );
 771
 772          vg_msg route_info = routes_block;
 773          if( vg_msg_seekframe( &route_info,
 774                                mdl_pstr(&world->meta,route->pstr_name) ) ){
 775
 776             u32 flags;
 777             vg_msg_getkvintg( &route_info, "flags", k_vg_msg_u32, &flags );
 778             route->flags |= flags;
 779
 780             vg_msg_getkvintg( &route_info, "best_laptime", k_vg_msg_f64,
 781                               &route->best_laptime );
 782
 783             f32 sections[ route->checkpoints_count ];
 784             vg_msg_cmd cmd;
 785             if( vg_msg_getkvcmd( &route_info, "sections", &cmd ) ){
 786                vg_msg_cast( cmd.value, cmd.code, sections,
 787                             k_vg_msg_f32 |
 788                             vg_msg_count_bits(route->checkpoints_count) );
 789             }
 790             else{
 791                for( u32 j=0; j<route->checkpoints_count; j ++ )
 792                   sections[j] = 0.0f;
 793             }
 794
 795             for( u32 j=0; j<route->checkpoints_count; j ++ ){
 796                ent_checkpoint *cp = mdl_arritm( &world->ent_checkpoint,
 797                      route->checkpoints_start + j );
 798
 799                cp->best_time = sections[j];
 800             }
 801
 802             /* LEGACY: check if steam achievements can give us a medal */
 803             if( steam_ready && steam_stats_ready ){
 804                for( u32 j=0; j<vg_list_size(track_infos); j ++ ){
 805                   struct track_info *inf = &track_infos[j];
 806                   if( !strcmp(inf->name,
 807                               mdl_pstr(&world->meta,route->pstr_name))){
 808
 809                      steamapi_bool set = 0;
 810                      if( SteamAPI_ISteamUserStats_GetAchievement(
 811                               hSteamUserStats, inf->achievement_id, &set ) )
 812                      {
 813                         if( set ){
 814                            route->flags |= k_ent_route_flag_achieve_silver;
 815                         }
 816                      }
 817                   }
 818                }
 819             }
 820          }
 821       }
 822    }
 823
 824    ent_region_re_eval( world );
 825 }
 826
 827 void world_entity_serialize( world_instance *world, vg_msg *sav )
 828 {
 829    for( u32 i=0; i<mdl_arrcount(&world->ent_challenge); i++ ){
 830       ent_challenge *challenge = mdl_arritm(&world->ent_challenge,i);
 831
 832       const char *alias = mdl_pstr(&world->meta,challenge->pstr_alias);
 833       vg_msg_wkvnum( sav, alias, k_vg_msg_u32, 1, &challenge->status );
 834    }
 835
 836    if( mdl_arrcount(&world->ent_route) ){
 837       vg_msg_frame( sav, "routes" );
 838       for( u32 i=0; i<mdl_arrcount(&world->ent_route); i++ ){
 839          ent_route *route = mdl_arritm( &world->ent_route, i );
 840
 841          vg_msg_frame( sav, mdl_pstr( &world->meta, route->pstr_name ) );
 842          {
 843             vg_msg_wkvnum( sav, "flags", k_vg_msg_u32, 1, &route->flags );
 844             vg_msg_wkvnum( sav, "best_laptime",
 845                            k_vg_msg_f64, 1, &route->best_laptime );
 846
 847             f32 sections[ route->checkpoints_count ];
 848
 849             for( u32 j=0; j<route->checkpoints_count; j ++ ){
 850                ent_checkpoint *cp = mdl_arritm( &world->ent_checkpoint,
 851                      route->checkpoints_start + j );
 852
 853                sections[j] = cp->best_time;
 854             }
 855
 856             vg_msg_wkvnum( sav, "sections", k_vg_msg_f32,
 857                            route->checkpoints_count, sections );
 858          }
 859          vg_msg_end_frame( sav );
 860       }
 861       vg_msg_end_frame( sav );
 862    }
 863 }