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    vg_async_call( world_link_gates_async, world, 0 );
 186    vg_async_stall();
 187
 188    /* water */
 189    for( u32 j=0; j<mdl_arrcount(&world->ent_water); j++ ){
 190       ent_water *water = mdl_arritm( &world->ent_water, j );
 191       if( world->water.enabled ){
 192          vg_warn( "Multiple water surfaces in level!\n" );
 193          break;
 194       }
 195
 196       world->water.enabled = 1;
 197       water_set_surface( world, water->transform.co[1] );
 198    }
 199
 200    /* volumes */
 201    for( u32 j=0; j<mdl_arrcount(&world->ent_volume); j++ ){
 202       ent_volume *volume = mdl_arritm( &world->ent_volume, j );
 203       mdl_transform_m4x3( &volume->transform, volume->to_world );
 204       m4x3_invert_full( volume->to_world, volume->to_local );
 205    }
 206
 207    /* audio packs */
 208    for( u32 j=0; j<mdl_arrcount(&world->ent_audio); j++ ){
 209       ent_audio *audio = mdl_arritm( &world->ent_audio, j );
 210
 211       for( u32 k=0; k<audio->clip_count; k++ ){
 212          ent_audio_clip *clip = mdl_arritm( &world->ent_audio_clip,
 213                                              audio->clip_start+k );
 214
 215          if( clip->_.file.pack_size ){
 216             u32 size = clip->_.file.pack_size,
 217                 offset = clip->_.file.pack_offset;
 218
 219             /* embedded files are fine to clear the scratch buffer, only
 220              * external audio uses it */
 221
 222             vg_linear_clear( vg_mem.scratch );
 223             void *data = vg_linear_alloc( vg_mem.scratch,
 224                                           clip->_.file.pack_size );
 225
 226             mdl_fread_pack_file( &world->meta, &clip->_.file, data );
 227
 228             clip->_.clip.path = NULL;
 229             clip->_.clip.flags = audio->flags;
 230             clip->_.clip.data = data;
 231             clip->_.clip.size = size;
 232          }
 233          else{
 234             clip->_.clip.path = mdl_pstr(&world->meta,clip->_.file.pstr_path);
 235             clip->_.clip.flags = audio->flags;
 236             clip->_.clip.data = NULL;
 237             clip->_.clip.size = 0;
 238          }
 239
 240          audio_clip_load( &clip->_.clip, world->heap );
 241       }
 242    }
 243
 244    /* create generic entity hierachy for those who need it */
 245    u32 indexed_count = 0;
 246    struct {
 247       u32 type;
 248       mdl_array_ptr *array;
 249    }
 250    indexables[] = {
 251       { k_ent_gate, &world->ent_gate },
 252       { k_ent_objective, &world->ent_objective },
 253       { k_ent_volume, &world->ent_volume },
 254       { k_ent_challenge, &world->ent_challenge },
 255       { k_ent_glider, &world->ent_glider },
 256       { k_ent_npc, &world->ent_npc }
 257    };
 258
 259    for( u32 i=0; i<vg_list_size(indexables); i++ )
 260       indexed_count += mdl_arrcount( indexables[i].array );
 261    vg_info( "indexing %u entities\n", indexed_count );
 262
 263    world->entity_list = vg_linear_alloc( world->heap,
 264                                          vg_align8(indexed_count*sizeof(u32)));
 265
 266    u32 index=0;
 267    for( u32 i=0; i<vg_list_size(indexables); i++ ){
 268       u32 type  = indexables[i].type,
 269           count = mdl_arrcount( indexables[i].array );
 270
 271       for( u32 j=0; j<count; j ++ )
 272          world->entity_list[index ++] = mdl_entity_id( type, j );
 273    }
 274
 275    world->entity_bh = bh_create( world->heap, &bh_system_entity_list, world,
 276                                  indexed_count, 2 );
 277
 278    world->tar_min = world->entity_bh->nodes[0].bbx[0][1];
 279    world->tar_max = world->entity_bh->nodes[0].bbx[1][1] + 20.0f;
 280
 281    for( u32 i=0; i<mdl_arrcount(&world->ent_marker); i++ ){
 282       ent_marker *marker = mdl_arritm( &world->ent_marker, i );
 283
 284       if( MDL_CONST_PSTREQ( &world->meta, marker->pstr_alias, "tar_min" ) )
 285          world->tar_min = marker->transform.co[1];
 286
 287       if( MDL_CONST_PSTREQ( &world->meta, marker->pstr_alias, "tar_max" ) )
 288          world->tar_max = marker->transform.co[1];
 289    }
 290 }
 291
 292 ent_spawn *world_find_closest_spawn( world_instance *world, v3f position )
 293 {
 294    ent_spawn *rp = NULL, *r;
 295    float min_dist = INFINITY;
 296
 297    for( u32 i=0; i<mdl_arrcount(&world->ent_spawn); i++ ){
 298       r = mdl_arritm( &world->ent_spawn, i );
 299       float d = v3_dist2( r->transform.co, position );
 300
 301       if( d < min_dist ){
 302          min_dist = d;
 303          rp = r;
 304       }
 305    }
 306
 307    if( !rp ){
 308       if( mdl_arrcount(&world->ent_spawn) ){
 309          vg_warn( "Invalid distances to spawns.. defaulting to first one.\n" );
 310          return mdl_arritm( &world->ent_spawn, 0 );
 311       }
 312       else{
 313          vg_error( "There are no spawns in the level!\n" );
 314       }
 315    }
 316
 317    return rp;
 318 }
 319
 320 ent_spawn *world_find_spawn_by_name( world_instance *world, const char *name )
 321 {
 322    ent_spawn *rp = NULL, *r;
 323    for( u32 i=0; i<mdl_arrcount(&world->ent_spawn); i++ ){
 324       r = mdl_arritm( &world->ent_spawn, i );
 325       if( !strcmp( mdl_pstr(&world->meta, r->pstr_name), name ) ){
 326          rp = r;
 327          break;
 328       }
 329    }
 330
 331    if( !rp )
 332       vg_warn( "No spawn named '%s'\n", name );
 333
 334    return rp;
 335 }
 336
 337 void world_default_spawn_pos( world_instance *world, v3f pos )
 338 {
 339    ent_spawn *rp = world_find_spawn_by_name( world, "start" );
 340    if( !rp ) rp = world_find_closest_spawn( world, (v3f){0,0,0} );
 341    if( rp )
 342       v3_copy( rp->transform.co, pos );
 343    else
 344    {
 345       vg_error( "There are no valid spawns in the world\n" );
 346       v3_zero( pos );
 347    }
 348 }
 349
 350 void ent_volume_call( world_instance *world, ent_call *call )
 351 {
 352    u32 index = mdl_entity_id_id( call->id );
 353    ent_volume *volume = mdl_arritm( &world->ent_volume, index );
 354    if( !volume->target ) return;
 355
 356    if( call->function == k_ent_function_trigger ){
 357       call->id = volume->target;
 358
 359       if( volume->flags & k_ent_volume_flag_particles ){
 360          float *co = alloca( sizeof(float)*3 );
 361          co[0] = vg_randf64(&vg.rand)*2.0f-1.0f;
 362          co[1] = vg_randf64(&vg.rand)*2.0f-1.0f;
 363          co[2] = vg_randf64(&vg.rand)*2.0f-1.0f;
 364          m4x3_mulv( volume->to_world, co, co );
 365
 366          call->function = k_ent_function_particle_spawn;
 367          call->data = co;
 368          entity_call( world, call );
 369       }
 370       else{
 371          call->function = volume->trigger.event;
 372          entity_call( world, call );
 373       }
 374    }
 375    else if( call->function == k_ent_function_trigger_leave ){
 376       call->id = volume->target;
 377
 378       if( volume->flags & k_ent_volume_flag_particles ){
 379          vg_warn( "Invalid condition; calling leave on particle volume.\n" );
 380       }
 381       else{
 382          call->function = volume->trigger.event_leave;
 383          entity_call( world, call );
 384       }
 385    }
 386 }
 387
 388 void ent_audio_call( world_instance *world, ent_call *call )
 389 {
 390    if( world->status == k_world_status_unloading ){
 391       vg_warn( "cannot modify audio while unloading world\n" );
 392       return;
 393    }
 394
 395    u8 world_id = (world - world_static.instances) + 1;
 396    u32 index = mdl_entity_id_id( call->id );
 397    ent_audio *audio = mdl_arritm( &world->ent_audio, index );
 398
 399    v3f sound_co;
 400
 401    if( call->function == k_ent_function_particle_spawn ){
 402       v3_copy( call->data, sound_co );
 403    }
 404    else if( call->function == k_ent_function_trigger ){
 405       v3_copy( audio->transform.co, sound_co );
 406    }
 407    else
 408       return;
 409
 410    float chance = vg_randf64(&vg.rand)*100.0f,
 411          bar = 0.0f;
 412
 413    for( u32 i=0; i<audio->clip_count; i++ ){
 414       ent_audio_clip *clip = mdl_arritm( &world->ent_audio_clip,
 415                                           audio->clip_start+i );
 416
 417       float mod = world->probabilities[ audio->probability_curve ],
 418             p   = clip->probability * mod;
 419
 420       bar += p;
 421       if( chance < bar )
 422       {
 423          audio_lock();
 424
 425          if( audio->behaviour == k_channel_behaviour_unlimited )
 426          {
 427             audio_oneshot_3d( &clip->_.clip, sound_co,
 428                               audio->transform.s[0],
 429                               audio->volume );
 430          }
 431          else if( audio->behaviour == k_channel_behaviour_discard_if_full )
 432          {
 433             audio_channel *ch =
 434                audio_get_group_idle_channel( audio->group,
 435                                              audio->max_channels );
 436
 437             if( ch )
 438             {
 439                audio_channel_init( ch, &clip->_.clip, audio->flags );
 440                audio_channel_group( ch, audio->group );
 441                audio_channel_world( ch, world_id );
 442                audio_channel_set_spacial( ch, sound_co, audio->transform.s[0] );
 443                audio_channel_edit_volume( ch, audio->volume, 1 );
 444                ch = audio_relinquish_channel( ch );
 445             }
 446          }
 447          else if( audio->behaviour == k_channel_behaviour_crossfade_if_full)
 448          {
 449             audio_channel *ch =
 450                audio_get_group_idle_channel( audio->group,
 451                                              audio->max_channels );
 452
 453             /* group is full */
 454             if( !ch ){
 455                audio_channel *existing =
 456                   audio_get_group_first_active_channel( audio->group );
 457
 458                if( existing ){
 459                   if( existing->source == &clip->_.clip ){
 460                      audio_unlock();
 461                      return;
 462                   }
 463
 464                   existing->group = 0;
 465                   existing = audio_channel_fadeout(existing, audio->crossfade);
 466                }
 467
 468                ch = audio_get_first_idle_channel();
 469             }
 470
 471             if( ch )
 472             {
 473                audio_channel_init( ch, &clip->_.clip, audio->flags );
 474                audio_channel_group( ch, audio->group );
 475                audio_channel_world( ch, world_id );
 476                audio_channel_fadein( ch, audio->crossfade );
 477                ch = audio_relinquish_channel( ch );
 478             }
 479          }
 480
 481          audio_unlock();
 482          return;
 483       }
 484    }
 485 }
 486
 487
 488 void ent_ccmd_call( world_instance *world, ent_call *call )
 489 {
 490    if( call->function == k_ent_function_trigger ){
 491       u32 index = mdl_entity_id_id( call->id );
 492       ent_ccmd *ccmd = mdl_arritm( &world->ent_ccmd, index );
 493       vg_execute_console_input( mdl_pstr(&world->meta, ccmd->pstr_command),
 494                                 0 );
 495    }
 496 }
 497
 498 /*
 499  * BVH implementation
 500  * ----------------------------------------------------------------------------
 501  */
 502
 503 void entity_bh_expand_bound( void *user, boxf bound, u32 item_index )
 504 {
 505    world_instance *world = user;
 506
 507    u32 id    = world->entity_list[ item_index ],
 508        type  = mdl_entity_id_type( id ),
 509        index = mdl_entity_id_id( id );
 510
 511    if( type == k_ent_gate ){
 512       ent_gate *gate = mdl_arritm( &world->ent_gate, index );
 513       boxf box = {{ -gate->dimensions[0], -gate->dimensions[1], -0.1f },
 514                   {  gate->dimensions[0],  gate->dimensions[1],  0.1f }};
 515
 516       m4x3_expand_aabb_aabb( gate->to_world, bound, box );
 517    }
 518    else if( type == k_ent_objective ){
 519       ent_objective *objective = mdl_arritm( &world->ent_objective, index );
 520
 521       /* TODO: This might be more work than necessary. could maybe just get
 522        *       away with representing them as points */
 523
 524       boxf box;
 525       box_init_inf( box );
 526
 527       for( u32 i=0; i<objective->submesh_count; i++ ){
 528          mdl_submesh *sm = mdl_arritm( &world->meta.submeshs,
 529                                        objective->submesh_start+i );
 530          box_concat( box, sm->bbx );
 531       }
 532
 533       m4x3f transform;
 534       mdl_transform_m4x3( &objective->transform, transform );
 535       m4x3_expand_aabb_aabb( transform, bound, box );
 536    }
 537    else if( type == k_ent_volume ){
 538       ent_volume *volume = mdl_arritm( &world->ent_volume, index );
 539       m4x3_expand_aabb_aabb( volume->to_world, bound,
 540                               (boxf){{-1.0f,-1.0f,-1.0f},{ 1.0f, 1.0f, 1.0f}} );
 541    }
 542    else if( type == k_ent_challenge ){
 543       ent_challenge *challenge = mdl_arritm( &world->ent_challenge, index );
 544
 545       boxf box = {{-1.2f*0.5f,-0.72f*0.5f,-0.01f*0.5f},
 546                   { 1.2f*0.5f, 0.72f*0.5f, 0.01f*0.5f}};
 547       m4x3f transform;
 548       mdl_transform_m4x3( &challenge->transform, transform );
 549       m4x3_expand_aabb_aabb( transform, bound, box );
 550    }
 551    else if( type == k_ent_glider ){
 552       ent_glider *glider = mdl_arritm( &world->ent_glider, index );
 553       m4x3f transform;
 554       mdl_transform_m4x3( &glider->transform, transform );
 555       m4x3_expand_aabb_aabb( transform, bound,
 556                             (boxf){{-1.0f,-1.0f,-1.0f},{ 1.0f, 1.0f, 1.0f}} );
 557    }
 558    else if( type == k_ent_npc )
 559    {
 560       ent_npc *npc = mdl_arritm( &world->ent_npc, index );
 561       box_addpt( bound, npc->transform.co );
 562    }
 563    else{
 564       vg_fatal_error( "Programming error\n" );
 565    }
 566 }
 567
 568 float entity_bh_centroid( void *user, u32 item_index, int axis )
 569 {
 570    world_instance *world = user;
 571
 572    u32 id    = world->entity_list[ item_index ],
 573        type  = mdl_entity_id_type( id ),
 574        index = mdl_entity_id_id( id );
 575
 576    if( type == k_ent_gate ){
 577       ent_gate *gate = mdl_arritm( &world->ent_gate, index );
 578       return gate->to_world[3][axis];
 579    }
 580    else if( type == k_ent_objective ){
 581       ent_objective *objective = mdl_arritm( &world->ent_objective, index );
 582       return objective->transform.co[axis];
 583    }
 584    else if( type == k_ent_volume ){
 585       ent_volume *volume = mdl_arritm( &world->ent_volume, index );
 586       return volume->transform.co[axis];
 587    }
 588    else if( type == k_ent_challenge )
 589    {
 590       ent_challenge *challenge = mdl_arritm( &world->ent_challenge, index );
 591       return challenge->transform.co[axis];
 592    }
 593    else if( type == k_ent_glider )
 594    {
 595       ent_glider *glider = mdl_arritm( &world->ent_glider, index );
 596       return glider->transform.co[axis];
 597    }
 598    else if( type == k_ent_npc )
 599    {
 600       ent_npc *npc = mdl_arritm( &world->ent_npc, index );
 601       return npc->transform.co[axis];
 602    }
 603    else
 604    {
 605       vg_fatal_error( "Programming error\n" );
 606       return INFINITY;
 607    }
 608 }
 609
 610 void entity_bh_swap( void *user, u32 ia, u32 ib )
 611 {
 612    world_instance *world = user;
 613
 614    u32 a = world->entity_list[ ia ],
 615        b = world->entity_list[ ib ];
 616
 617    world->entity_list[ ia ] = b;
 618    world->entity_list[ ib ] = a;
 619 }
 620
 621 void entity_bh_debug( void *user, u32 item_index ){
 622    world_instance *world = user;
 623
 624    u32 id    = world->entity_list[ item_index ],
 625        type  = mdl_entity_id_type( id ),
 626        index = mdl_entity_id_id( id );
 627
 628    if( type == k_ent_gate ){
 629       ent_gate *gate = mdl_arritm( &world->ent_gate, index );
 630       boxf box = {{ -gate->dimensions[0], -gate->dimensions[1], -0.1f },
 631                   {  gate->dimensions[0],  gate->dimensions[1],  0.1f }};
 632       vg_line_boxf_transformed( gate->to_world, box, 0xf000ff00 );
 633    }
 634    else if( type == k_ent_objective ){
 635       ent_objective *objective = mdl_arritm( &world->ent_objective, index );
 636       boxf box;
 637       box_init_inf( box );
 638
 639       for( u32 i=0; i<objective->submesh_count; i++ ){
 640          mdl_submesh *sm = mdl_arritm( &world->meta.submeshs,
 641                                        objective->submesh_start+i );
 642          box_concat( box, sm->bbx );
 643       }
 644
 645       m4x3f transform;
 646       mdl_transform_m4x3( &objective->transform, transform );
 647       vg_line_boxf_transformed( transform, box, 0xf000ff00 );
 648    }
 649    else if( type == k_ent_volume ){
 650       ent_volume *volume = mdl_arritm( &world->ent_volume, index );
 651       vg_line_boxf_transformed( volume->to_world,
 652                                 (boxf){{-1.0f,-1.0f,-1.0f},{ 1.0f, 1.0f, 1.0f}},
 653                                 0xf000ff00 );
 654    }
 655    else if( type == k_ent_challenge ){
 656       ent_challenge *challenge = mdl_arritm( &world->ent_challenge, index );
 657
 658       boxf box = {{-1.2f*0.5f,-0.72f*0.5f,-0.01f*0.5f},
 659                   { 1.2f*0.5f, 0.72f*0.5f, 0.01f*0.5f}};
 660       m4x3f transform;
 661       mdl_transform_m4x3( &challenge->transform, transform );
 662       vg_line_boxf_transformed( transform, box, 0xf0ff0000 );
 663    }
 664    else{
 665       vg_fatal_error( "Programming error\n" );
 666    }
 667 }
 668
 669 void update_ach_models(void)
 670 {
 671    world_instance *hub = &world_static.instances[k_world_purpose_hub];
 672    if( hub->status != k_world_status_loaded ) return;
 673
 674    for( u32 i=0; i<mdl_arrcount( &hub->ent_prop ); i ++ ){
 675       ent_prop *prop = mdl_arritm( &hub->ent_prop, i );
 676       if( prop->flags & 0x2 ){
 677          if( MDL_CONST_PSTREQ( &hub->meta, prop->pstr_alias, "MARC" ) )
 678             if( skaterift.achievements & 0x1 )
 679                prop->flags &= ~0x1;
 680          if( MDL_CONST_PSTREQ( &hub->meta, prop->pstr_alias, "ALBERT" ) )
 681             if( skaterift.achievements & 0x2 )
 682                prop->flags &= ~0x1;
 683          if( MDL_CONST_PSTREQ( &hub->meta, prop->pstr_alias, "JANET" ) )
 684             if( skaterift.achievements & 0x4 )
 685                prop->flags &= ~0x1;
 686          if( MDL_CONST_PSTREQ( &hub->meta, prop->pstr_alias, "BERNADETTA" ) )
 687             if( skaterift.achievements & 0x8 )
 688                prop->flags &= ~0x1;
 689       }
 690    }
 691 }
 692
 693 void entity_bh_closest( void *user, u32 item_index, v3f point, v3f closest )
 694 {
 695    world_instance *world = user;
 696
 697    u32 id    = world->entity_list[ item_index ],
 698        type  = mdl_entity_id_type( id ),
 699        index = mdl_entity_id_id( id );
 700
 701    if( type == k_ent_gate ){
 702       ent_gate *gate = mdl_arritm( &world->ent_gate, index );
 703       v3_copy( gate->to_world[3], closest );
 704    }
 705    else if( type == k_ent_objective ){
 706       ent_objective *challenge = mdl_arritm( &world->ent_objective, index );
 707       v3_copy( challenge->transform.co, closest );
 708    }
 709    else if( type == k_ent_volume ){
 710       ent_volume *volume = mdl_arritm( &world->ent_volume, index );
 711       v3_copy( volume->to_world[3], closest );
 712    }
 713    else if( type == k_ent_challenge ){
 714       ent_challenge *challenge = mdl_arritm( &world->ent_challenge, index );
 715       v3_copy( challenge->transform.co, closest );
 716    }
 717    else{
 718       vg_fatal_error( "Programming error\n" );
 719    }
 720 }
 721
 722 void world_entity_start( world_instance *world, vg_msg *sav )
 723 {
 724    vg_info( "Start instance %p\n", world );
 725
 726    world->probabilities[ k_probability_curve_constant ] = 1.0f;
 727    for( u32 i=0; i<mdl_arrcount(&world->ent_audio); i++ )
 728    {
 729       ent_audio *audio = mdl_arritm(&world->ent_audio,i);
 730       if( audio->flags & AUDIO_FLAG_AUTO_START )
 731       {
 732          ent_call call;
 733          call.data = NULL;
 734          call.function = k_ent_function_trigger;
 735          call.id = mdl_entity_id( k_ent_audio, i );
 736          entity_call( world, &call );
 737       }
 738    }
 739
 740    /* read savedata
 741     * ----------------------------------------------------------------------- */
 742
 743    for( u32 i=0; i<mdl_arrcount(&world->ent_challenge); i++ ){
 744       ent_challenge *challenge = mdl_arritm( &world->ent_challenge, i );
 745       const char *alias = mdl_pstr( &world->meta, challenge->pstr_alias );
 746
 747       u32 result;
 748       vg_msg_getkvintg( sav, alias, k_vg_msg_u32, &result );
 749
 750       if( result ){
 751          ent_call call;
 752          call.data = NULL;
 753          call.function = 0;
 754          call.id = mdl_entity_id( k_ent_challenge, i );
 755          entity_call( world, &call );
 756       }
 757    }
 758
 759    vg_msg routes_block = *sav;
 760    if( vg_msg_seekframe( &routes_block, "routes" ) ){
 761       for( u32 i=0; i<mdl_arrcount(&world->ent_route); i++ ){
 762          ent_route *route = mdl_arritm( &world->ent_route, i );
 763
 764          vg_msg route_info = routes_block;
 765          if( vg_msg_seekframe( &route_info,
 766                                mdl_pstr(&world->meta,route->pstr_name) ) ){
 767
 768             u32 flags;
 769             vg_msg_getkvintg( &route_info, "flags", k_vg_msg_u32, &flags );
 770             route->flags |= flags;
 771
 772             vg_msg_getkvintg( &route_info, "best_laptime", k_vg_msg_f64,
 773                               &route->best_laptime );
 774
 775             f32 sections[ route->checkpoints_count ];
 776             vg_msg_cmd cmd;
 777             if( vg_msg_getkvcmd( &route_info, "sections", &cmd ) ){
 778                vg_msg_cast( cmd.value, cmd.code, sections,
 779                             k_vg_msg_f32 |
 780                             vg_msg_count_bits(route->checkpoints_count) );
 781             }
 782             else{
 783                for( u32 j=0; j<route->checkpoints_count; j ++ )
 784                   sections[j] = 0.0f;
 785             }
 786
 787             for( u32 j=0; j<route->checkpoints_count; j ++ ){
 788                ent_checkpoint *cp = mdl_arritm( &world->ent_checkpoint,
 789                      route->checkpoints_start + j );
 790
 791                cp->best_time = sections[j];
 792             }
 793
 794             /* LEGACY: check if steam achievements can give us a medal */
 795             if( steam_ready && steam_stats_ready ){
 796                for( u32 j=0; j<vg_list_size(track_infos); j ++ ){
 797                   struct track_info *inf = &track_infos[j];
 798                   if( !strcmp(inf->name,
 799                               mdl_pstr(&world->meta,route->pstr_name))){
 800
 801                      steamapi_bool set = 0;
 802                      if( SteamAPI_ISteamUserStats_GetAchievement(
 803                               hSteamUserStats, inf->achievement_id, &set ) )
 804                      {
 805                         if( set ){
 806                            route->flags |= k_ent_route_flag_achieve_silver;
 807                         }
 808                      }
 809                   }
 810                }
 811             }
 812          }
 813       }
 814    }
 815
 816    ent_region_re_eval( world );
 817 }
 818
 819 void world_entity_serialize( world_instance *world, vg_msg *sav )
 820 {
 821    for( u32 i=0; i<mdl_arrcount(&world->ent_challenge); i++ ){
 822       ent_challenge *challenge = mdl_arritm(&world->ent_challenge,i);
 823
 824       const char *alias = mdl_pstr(&world->meta,challenge->pstr_alias);
 825       vg_msg_wkvnum( sav, alias, k_vg_msg_u32, 1, &challenge->status );
 826    }
 827
 828    if( mdl_arrcount(&world->ent_route) ){
 829       vg_msg_frame( sav, "routes" );
 830       for( u32 i=0; i<mdl_arrcount(&world->ent_route); i++ ){
 831          ent_route *route = mdl_arritm( &world->ent_route, i );
 832
 833          vg_msg_frame( sav, mdl_pstr( &world->meta, route->pstr_name ) );
 834          {
 835             vg_msg_wkvnum( sav, "flags", k_vg_msg_u32, 1, &route->flags );
 836             vg_msg_wkvnum( sav, "best_laptime",
 837                            k_vg_msg_f64, 1, &route->best_laptime );
 838
 839             f32 sections[ route->checkpoints_count ];
 840
 841             for( u32 j=0; j<route->checkpoints_count; j ++ ){
 842                ent_checkpoint *cp = mdl_arritm( &world->ent_checkpoint,
 843                      route->checkpoints_start + j );
 844
 845                sections[j] = cp->best_time;
 846             }
 847
 848             vg_msg_wkvnum( sav, "sections", k_vg_msg_f32,
 849                            route->checkpoints_count, sections );
 850          }
 851          vg_msg_end_frame( sav );
 852       }
 853       vg_msg_end_frame( sav );
 854    }
 855 }