world_entity.c

   1 #ifndef WORLD_ENTITY_C
   2 #define WORLD_ENTITY_C
   3
   4 #include "model.h"
   5 #include "entity.h"
   6 #include "world.h"
   7 #include "world_load.h"
   8 #include "save.h"
   9 #include "vg/vg_msg.h"
  10 #include "menu.h"
  11 #include "ent_challenge.h"
  12 #include "ent_skateshop.h"
  13 #include "ent_route.h"
  14 #include "ent_traffic.h"
  15
  16 static void world_entity_focus( u32 entity_id ){
  17    localplayer.immobile = 1;
  18    menu.disable_open = 1;
  19
  20    v3_zero( localplayer.rb.v );
  21    v3_zero( localplayer.rb.w );
  22    player_walk.move_speed = 0.0f;
  23    world_static.focused_entity = entity_id;
  24    skaterift.activity = k_skaterift_ent_focus;
  25 }
  26
  27 static void world_entity_unfocus(void){
  28    localplayer.immobile = 0;
  29    skaterift.activity = k_skaterift_default;
  30    menu.disable_open = 0;
  31    srinput.state = k_input_state_resume;
  32 }
  33
  34 static void world_entity_focus_camera( world_instance *world, u32 uid ){
  35    if( mdl_entity_id_type( uid ) == k_ent_camera ){
  36       u32 index = mdl_entity_id_id( uid );
  37       ent_camera *cam = mdl_arritm( &world->ent_camera, index );
  38
  39       v3f dir = {0.0f,-1.0f,0.0f};
  40       mdl_transform_vector( &cam->transform, dir, dir );
  41       v3_angles( dir, world_static.focus_cam.angles );
  42       v3_copy( cam->transform.co, world_static.focus_cam.pos );
  43       world_static.focus_cam.fov = cam->fov;
  44    }
  45    else {
  46       camera_copy( &localplayer.cam, &world_static.focus_cam );
  47
  48       /* TODO ? */
  49       world_static.focus_cam.nearz = localplayer.cam.nearz;
  50       world_static.focus_cam.farz = localplayer.cam.farz;
  51    }
  52 }
  53
  54 /* logic preupdate */
  55 static void world_entity_focus_preupdate(void){
  56    f32 rate = vg_minf( 1.0f, vg.time_frame_delta * 2.0f );
  57    int active = 0;
  58    if( skaterift.activity == k_skaterift_ent_focus )
  59       active = 1;
  60
  61    vg_slewf( &world_static.focus_strength, active,
  62              vg.time_frame_delta * (1.0f/0.5f) );
  63
  64    u32 type = mdl_entity_id_type( world_static.focused_entity ),
  65        index = mdl_entity_id_id( world_static.focused_entity );
  66    world_instance *world = world_current_instance();
  67
  68    /* TODO: Table. */
  69    if( type == k_ent_skateshop ){
  70       ent_skateshop *skateshop = mdl_arritm( &world->ent_skateshop, index );
  71       ent_skateshop_preupdate( skateshop, active );
  72    }
  73    else if( type == k_ent_challenge ){
  74       ent_challenge *challenge = mdl_arritm( &world->ent_challenge, index );
  75       ent_challenge_preupdate( challenge, active );
  76    }
  77    else if( type == k_ent_route ){
  78       ent_route *route = mdl_arritm( &world->ent_route, index );
  79       ent_route_preupdate( route, active );
  80    }
  81 }
  82
  83 /* additional renderings like text etc.. */
  84 static void world_entity_focus_render(void){
  85    world_instance *world = world_current_instance();
  86    if( skaterift.activity != k_skaterift_ent_focus ){
  87       skateshop_render_nonfocused( world, &skaterift.cam );
  88       return;
  89    }
  90
  91    u32 type = mdl_entity_id_type( world_static.focused_entity ),
  92        index = mdl_entity_id_id( world_static.focused_entity );
  93
  94    if( type == k_ent_skateshop ){
  95       ent_skateshop *skateshop = mdl_arritm( &world->ent_skateshop, index );
  96       skateshop_render( skateshop );
  97    }
  98    else if( type == k_ent_challenge ){}
  99    else if( type == k_ent_route ){}
 100    else if( type == k_ent_miniworld ){}
 101    else {
 102       vg_fatal_error( "Programming error\n" );
 103    }
 104 }
 105
 106 static void world_gen_entities_init( world_instance *world ){
 107    /* lights */
 108    for( u32 j=0; j<mdl_arrcount(&world->ent_light); j ++ ){
 109       ent_light *light = mdl_arritm( &world->ent_light, j );
 110
 111       m4x3f to_world;
 112       q_m3x3( light->transform.q, to_world );
 113       v3_copy( light->transform.co, to_world[3] );
 114       m4x3_invert_affine( to_world, light->inverse_world );
 115
 116       light->angle_sin_cos[0] = sinf( light->angle * 0.5f );
 117       light->angle_sin_cos[1] = cosf( light->angle * 0.5f );
 118    }
 119
 120    /* gates */
 121    for( u32 j=0; j<mdl_arrcount(&world->ent_gate); j ++ ){
 122       ent_gate *gate = mdl_arritm( &world->ent_gate, j );
 123
 124       if( !(gate->flags & k_ent_gate_nonlocal) ) {
 125          gate_transform_update( gate );
 126       }
 127    }
 128
 129    vg_async_call( world_link_nonlocal_async, world, 0 );
 130
 131    /* water */
 132    for( u32 j=0; j<mdl_arrcount(&world->ent_water); j++ ){
 133       ent_water *water = mdl_arritm( &world->ent_water, j );
 134       if( world->water.enabled ){
 135          vg_warn( "Multiple water surfaces in level!\n" );
 136          break;
 137       }
 138
 139       world->water.enabled = 1;
 140       water_set_surface( world, water->transform.co[1] );
 141    }
 142
 143    /* volumes */
 144    for( u32 j=0; j<mdl_arrcount(&world->ent_volume); j++ ){
 145       ent_volume *volume = mdl_arritm( &world->ent_volume, j );
 146       mdl_transform_m4x3( &volume->transform, volume->to_world );
 147       m4x3_invert_full( volume->to_world, volume->to_local );
 148    }
 149
 150    /* audio packs */
 151    for( u32 j=0; j<mdl_arrcount(&world->ent_audio); j++ ){
 152       ent_audio *audio = mdl_arritm( &world->ent_audio, j );
 153
 154       for( u32 k=0; k<audio->clip_count; k++ ){
 155          ent_audio_clip *clip = mdl_arritm( &world->ent_audio_clip,
 156                                              audio->clip_start+k );
 157
 158          if( clip->_.file.pack_size ){
 159             u32 size = clip->_.file.pack_size,
 160                 offset = clip->_.file.pack_offset;
 161
 162             /* embedded files are fine to clear the scratch buffer, only
 163              * external audio uses it */
 164
 165             vg_linear_clear( vg_mem.scratch );
 166             void *data = vg_linear_alloc( vg_mem.scratch,
 167                                           clip->_.file.pack_size );
 168
 169             mdl_fread_pack_file( &world->meta, &clip->_.file, data );
 170
 171             clip->_.clip.path = NULL;
 172             clip->_.clip.flags = audio->flags;
 173             clip->_.clip.data = data;
 174             clip->_.clip.size = size;
 175          }
 176          else{
 177             clip->_.clip.path = mdl_pstr(&world->meta,clip->_.file.pstr_path);
 178             clip->_.clip.flags = audio->flags;
 179             clip->_.clip.data = NULL;
 180             clip->_.clip.size = 0;
 181          }
 182
 183          audio_clip_load( &clip->_.clip, world->heap );
 184       }
 185    }
 186
 187    /* create generic entity hierachy for those who need it */
 188    u32 indexed_count = 0;
 189    struct {
 190       u32 type;
 191       mdl_array_ptr *array;
 192    }
 193    indexables[] = {
 194       { k_ent_gate, &world->ent_gate },
 195       { k_ent_objective, &world->ent_objective },
 196       { k_ent_volume, &world->ent_volume },
 197       { k_ent_challenge, &world->ent_challenge }
 198    };
 199
 200    for( u32 i=0; i<vg_list_size(indexables); i++ )
 201       indexed_count += mdl_arrcount( indexables[i].array );
 202    vg_info( "indexing %u entities\n", indexed_count );
 203
 204    world->entity_list = vg_linear_alloc( world->heap,
 205                                          vg_align8(indexed_count*sizeof(u32)));
 206
 207    u32 index=0;
 208    for( u32 i=0; i<vg_list_size(indexables); i++ ){
 209       u32 type  = indexables[i].type,
 210           count = mdl_arrcount( indexables[i].array );
 211
 212       for( u32 j=0; j<count; j ++ )
 213          world->entity_list[index ++] = mdl_entity_id( type, j );
 214    }
 215
 216    world->entity_bh = bh_create( world->heap, &bh_system_entity_list, world,
 217                                  indexed_count, 2 );
 218
 219    world->tar_min = world->entity_bh->nodes[0].bbx[0][1];
 220    world->tar_max = world->entity_bh->nodes[0].bbx[1][1] + 20.0f;
 221
 222    for( u32 i=0; i<mdl_arrcount(&world->ent_marker); i++ ){
 223       ent_marker *marker = mdl_arritm( &world->ent_marker, i );
 224
 225       if( MDL_CONST_PSTREQ( &world->meta, marker->pstr_alias, "tar_min" ) )
 226          world->tar_min = marker->transform.co[1];
 227
 228       if( MDL_CONST_PSTREQ( &world->meta, marker->pstr_alias, "tar_max" ) )
 229          world->tar_max = marker->transform.co[1];
 230    }
 231 }
 232
 233 static
 234 ent_spawn *world_find_closest_spawn( world_instance *world, v3f position )
 235 {
 236    ent_spawn *rp = NULL, *r;
 237    float min_dist = INFINITY;
 238
 239    for( u32 i=0; i<mdl_arrcount(&world->ent_spawn); i++ ){
 240       r = mdl_arritm( &world->ent_spawn, i );
 241       float d = v3_dist2( r->transform.co, position );
 242
 243       if( d < min_dist ){
 244          min_dist = d;
 245          rp = r;
 246       }
 247    }
 248
 249    if( !rp ){
 250       if( mdl_arrcount(&world->ent_spawn) ){
 251          vg_warn( "Invalid distances to spawns.. defaulting to first one.\n" );
 252          return mdl_arritm( &world->ent_spawn, 0 );
 253       }
 254       else{
 255          vg_error( "There are no spawns in the level!\n" );
 256       }
 257    }
 258
 259    return rp;
 260 }
 261
 262 static
 263 ent_spawn *world_find_spawn_by_name( world_instance *world, const char *name )
 264 {
 265    ent_spawn *rp = NULL, *r;
 266    for( u32 i=0; i<mdl_arrcount(&world->ent_spawn); i++ ){
 267       r = mdl_arritm( &world->ent_spawn, i );
 268       if( !strcmp( mdl_pstr(&world->meta, r->pstr_name), name ) ){
 269          rp = r;
 270          break;
 271       }
 272    }
 273
 274    if( !rp )
 275       vg_warn( "No spawn named '%s'\n", name );
 276
 277    return rp;
 278 }
 279
 280 static void ent_volume_call( world_instance *world, ent_call *call ){
 281    u32 index = mdl_entity_id_id( call->id );
 282    ent_volume *volume = mdl_arritm( &world->ent_volume, index );
 283    if( !volume->target ) return;
 284
 285    if( call->function == k_ent_function_trigger ){
 286       call->id = volume->target;
 287
 288       if( volume->flags & k_ent_volume_flag_particles ){
 289          float *co = alloca( sizeof(float)*3 );
 290          co[0] = vg_randf64(&vg.rand)*2.0f-1.0f;
 291          co[1] = vg_randf64(&vg.rand)*2.0f-1.0f;
 292          co[2] = vg_randf64(&vg.rand)*2.0f-1.0f;
 293          m4x3_mulv( volume->to_world, co, co );
 294
 295          call->function = k_ent_function_particle_spawn;
 296          call->data = co;
 297          entity_call( world, call );
 298       }
 299       else{
 300          call->function = volume->trigger.event;
 301          entity_call( world, call );
 302       }
 303    }
 304    else if( call->function == k_ent_function_trigger_leave ){
 305       call->id = volume->target;
 306
 307       if( volume->flags & k_ent_volume_flag_particles ){
 308          assert(0);
 309       }
 310       else{
 311          call->function = volume->trigger.event_leave;
 312          entity_call( world, call );
 313       }
 314    }
 315 }
 316
 317 static void ent_audio_call( world_instance *world, ent_call *call ){
 318    if( world->status == k_world_status_unloading ){
 319       vg_warn( "cannot modify audio while unloading world\n" );
 320       return;
 321    }
 322
 323    u8 world_id = (world - world_static.instances) + 1;
 324    u32 index = mdl_entity_id_id( call->id );
 325    ent_audio *audio = mdl_arritm( &world->ent_audio, index );
 326
 327    v3f sound_co;
 328
 329    if( call->function == k_ent_function_particle_spawn ){
 330       v3_copy( call->data, sound_co );
 331    }
 332    else if( call->function == k_ent_function_trigger ){
 333       v3_copy( audio->transform.co, sound_co );
 334    }
 335    else
 336       return;
 337
 338    float chance = vg_randf64(&vg.rand)*100.0f,
 339          bar = 0.0f;
 340
 341    for( u32 i=0; i<audio->clip_count; i++ ){
 342       ent_audio_clip *clip = mdl_arritm( &world->ent_audio_clip,
 343                                           audio->clip_start+i );
 344
 345       float mod = world->probabilities[ audio->probability_curve ],
 346             p   = clip->probability * mod;
 347
 348       bar += p;
 349       if( chance < bar ){
 350          audio_lock();
 351
 352          if( audio->behaviour == k_channel_behaviour_unlimited ){
 353             audio_oneshot_3d( &clip->_.clip, sound_co,
 354                               audio->transform.s[0],
 355                               audio->volume );
 356          }
 357          else if( audio->behaviour == k_channel_behaviour_discard_if_full ){
 358             audio_channel *ch =
 359                audio_get_group_idle_channel( audio->group,
 360                                              audio->max_channels );
 361
 362             if( ch ){
 363                audio_channel_init( ch, &clip->_.clip, audio->flags );
 364                audio_channel_group( ch, audio->group );
 365                audio_channel_world( ch, world_id );
 366                audio_channel_set_spacial( ch, sound_co, audio->transform.s[0] );
 367                audio_channel_edit_volume( ch, audio->volume, 1 );
 368                ch = audio_relinquish_channel( ch );
 369             }
 370          }
 371          else if( audio->behaviour == k_channel_behaviour_crossfade_if_full){
 372             audio_channel *ch =
 373                audio_get_group_idle_channel( audio->group,
 374                                              audio->max_channels );
 375
 376             /* group is full */
 377             if( !ch ){
 378                audio_channel *existing =
 379                   audio_get_group_first_active_channel( audio->group );
 380
 381                if( existing ){
 382                   if( existing->source == &clip->_.clip ){
 383                      audio_unlock();
 384                      return;
 385                   }
 386
 387                   existing->group = 0;
 388                   existing = audio_channel_fadeout(existing, audio->crossfade);
 389                }
 390
 391                ch = audio_get_first_idle_channel();
 392             }
 393
 394             if( ch ){
 395                audio_channel_init( ch, &clip->_.clip, audio->flags );
 396                audio_channel_group( ch, audio->group );
 397                audio_channel_world( ch, world_id );
 398                audio_channel_fadein( ch, audio->crossfade );
 399                ch = audio_relinquish_channel( ch );
 400             }
 401          }
 402
 403          audio_unlock();
 404          return;
 405       }
 406    }
 407 }
 408
 409
 410 static void ent_ccmd_call( world_instance *world, ent_call *call ){
 411    if( call->function == k_ent_function_trigger ){
 412       u32 index = mdl_entity_id_id( call->id );
 413       ent_ccmd *ccmd = mdl_arritm( &world->ent_ccmd, index );
 414       vg_execute_console_input( mdl_pstr(&world->meta, ccmd->pstr_command) );
 415    }
 416 }
 417
 418 /*
 419  * BVH implementation
 420  * ----------------------------------------------------------------------------
 421  */
 422
 423 static void
 424 entity_bh_expand_bound( void *user, boxf bound, u32 item_index ){
 425    world_instance *world = user;
 426
 427    u32 id    = world->entity_list[ item_index ],
 428        type  = mdl_entity_id_type( id ),
 429        index = mdl_entity_id_id( id );
 430
 431    if( type == k_ent_gate ){
 432       ent_gate *gate = mdl_arritm( &world->ent_gate, index );
 433       boxf box = {{ -gate->dimensions[0], -gate->dimensions[1], -0.1f },
 434                   {  gate->dimensions[0],  gate->dimensions[1],  0.1f }};
 435
 436       m4x3_expand_aabb_aabb( gate->to_world, bound, box );
 437    }
 438    else if( type == k_ent_objective ){
 439       ent_objective *objective = mdl_arritm( &world->ent_objective, index );
 440
 441       /* TODO: This might be more work than necessary. could maybe just get
 442        *       away with representing them as points */
 443
 444       boxf box;
 445       box_init_inf( box );
 446
 447       for( u32 i=0; i<objective->submesh_count; i++ ){
 448          mdl_submesh *sm = mdl_arritm( &world->meta.submeshs,
 449                                        objective->submesh_start+i );
 450          box_concat( box, sm->bbx );
 451       }
 452
 453       m4x3f transform;
 454       mdl_transform_m4x3( &objective->transform, transform );
 455       m4x3_expand_aabb_aabb( transform, bound, box );
 456    }
 457    else if( type == k_ent_volume ){
 458       ent_volume *volume = mdl_arritm( &world->ent_volume, index );
 459       m4x3_expand_aabb_aabb( volume->to_world, bound,
 460                               (boxf){{-1.0f,-1.0f,-1.0f},{ 1.0f, 1.0f, 1.0f}} );
 461    }
 462    else if( type == k_ent_challenge ){
 463       ent_challenge *challenge = mdl_arritm( &world->ent_challenge, index );
 464
 465       boxf box = {{-1.2f*0.5f,-0.72f*0.5f,-0.01f*0.5f},
 466                   { 1.2f*0.5f, 0.72f*0.5f, 0.01f*0.5f}};
 467       m4x3f transform;
 468       mdl_transform_m4x3( &challenge->transform, transform );
 469       m4x3_expand_aabb_aabb( transform, bound, box );
 470    }
 471    else{
 472       vg_fatal_error( "Programming error\n" );
 473    }
 474 }
 475
 476 static float entity_bh_centroid( void *user, u32 item_index, int axis ){
 477    world_instance *world = user;
 478
 479    u32 id    = world->entity_list[ item_index ],
 480        type  = mdl_entity_id_type( id ),
 481        index = mdl_entity_id_id( id );
 482
 483    if( type == k_ent_gate ){
 484       ent_gate *gate = mdl_arritm( &world->ent_gate, index );
 485       return gate->to_world[3][axis];
 486    }
 487    else if( type == k_ent_objective ){
 488       ent_objective *objective = mdl_arritm( &world->ent_objective, index );
 489       return objective->transform.co[axis];
 490    }
 491    else if( type == k_ent_volume ){
 492       ent_volume *volume = mdl_arritm( &world->ent_volume, index );
 493       return volume->transform.co[axis];
 494    }
 495    else if( type == k_ent_challenge ){
 496       ent_challenge *challenge = mdl_arritm( &world->ent_challenge, index );
 497       return challenge->transform.co[axis];
 498    }
 499    else {
 500       vg_fatal_error( "Programming error\n" );
 501       return INFINITY;
 502    }
 503 }
 504
 505 static void entity_bh_swap( void *user, u32 ia, u32 ib ){
 506    world_instance *world = user;
 507
 508    u32 a = world->entity_list[ ia ],
 509        b = world->entity_list[ ib ];
 510
 511    world->entity_list[ ia ] = b;
 512    world->entity_list[ ib ] = a;
 513 }
 514
 515 static void entity_bh_debug( void *user, u32 item_index ){
 516    world_instance *world = user;
 517
 518    u32 id    = world->entity_list[ item_index ],
 519        type  = mdl_entity_id_type( id ),
 520        index = mdl_entity_id_id( id );
 521
 522    if( type == k_ent_gate ){
 523       ent_gate *gate = mdl_arritm( &world->ent_gate, index );
 524       boxf box = {{ -gate->dimensions[0], -gate->dimensions[1], -0.1f },
 525                   {  gate->dimensions[0],  gate->dimensions[1],  0.1f }};
 526       vg_line_boxf_transformed( gate->to_world, box, 0xf000ff00 );
 527    }
 528    else if( type == k_ent_objective ){
 529       ent_objective *objective = mdl_arritm( &world->ent_objective, index );
 530       boxf box;
 531       box_init_inf( box );
 532
 533       for( u32 i=0; i<objective->submesh_count; i++ ){
 534          mdl_submesh *sm = mdl_arritm( &world->meta.submeshs,
 535                                        objective->submesh_start+i );
 536          box_concat( box, sm->bbx );
 537       }
 538
 539       m4x3f transform;
 540       mdl_transform_m4x3( &objective->transform, transform );
 541       vg_line_boxf_transformed( transform, box, 0xf000ff00 );
 542    }
 543    else if( type == k_ent_volume ){
 544       ent_volume *volume = mdl_arritm( &world->ent_volume, index );
 545       vg_line_boxf_transformed( volume->to_world,
 546                                 (boxf){{-1.0f,-1.0f,-1.0f},{ 1.0f, 1.0f, 1.0f}},
 547                                 0xf000ff00 );
 548    }
 549    else if( type == k_ent_challenge ){
 550       ent_challenge *challenge = mdl_arritm( &world->ent_challenge, index );
 551
 552       boxf box = {{-1.2f*0.5f,-0.72f*0.5f,-0.01f*0.5f},
 553                   { 1.2f*0.5f, 0.72f*0.5f, 0.01f*0.5f}};
 554       m4x3f transform;
 555       mdl_transform_m4x3( &challenge->transform, transform );
 556       vg_line_boxf_transformed( transform, box, 0xf0ff0000 );
 557    }
 558    else{
 559       vg_fatal_error( "Programming error\n" );
 560    }
 561 }
 562
 563 static void update_ach_models(void){
 564    world_instance *hub = &world_static.instances[k_world_purpose_hub];
 565    if( hub->status != k_world_status_loaded ) return;
 566
 567    for( u32 i=0; i<mdl_arrcount( &hub->ent_prop ); i ++ ){
 568       ent_prop *prop = mdl_arritm( &hub->ent_prop, i );
 569       if( prop->flags & 0x2 ){
 570          if( MDL_CONST_PSTREQ( &hub->meta, prop->pstr_alias, "MARC" ) )
 571             if( skaterift.achievements & 0x1 )
 572                prop->flags &= ~0x1;
 573          if( MDL_CONST_PSTREQ( &hub->meta, prop->pstr_alias, "ALBERT" ) )
 574             if( skaterift.achievements & 0x2 )
 575                prop->flags &= ~0x1;
 576          if( MDL_CONST_PSTREQ( &hub->meta, prop->pstr_alias, "JANET" ) )
 577             if( skaterift.achievements & 0x4 )
 578                prop->flags &= ~0x1;
 579          if( MDL_CONST_PSTREQ( &hub->meta, prop->pstr_alias, "BERNADETTA" ) )
 580             if( skaterift.achievements & 0x8 )
 581                prop->flags &= ~0x1;
 582       }
 583    }
 584 }
 585
 586 static void entity_bh_closest( void *user, u32 item_index, v3f point,
 587                                   v3f closest ){
 588    world_instance *world = user;
 589
 590    u32 id    = world->entity_list[ item_index ],
 591        type  = mdl_entity_id_type( id ),
 592        index = mdl_entity_id_id( id );
 593
 594    if( type == k_ent_gate ){
 595       ent_gate *gate = mdl_arritm( &world->ent_gate, index );
 596       v3_copy( gate->to_world[3], closest );
 597    }
 598    else if( type == k_ent_objective ){
 599       ent_objective *challenge = mdl_arritm( &world->ent_objective, index );
 600       v3_copy( challenge->transform.co, closest );
 601    }
 602    else if( type == k_ent_volume ){
 603       ent_volume *volume = mdl_arritm( &world->ent_volume, index );
 604       v3_copy( volume->to_world[3], closest );
 605    }
 606    else if( type == k_ent_challenge ){
 607       ent_challenge *challenge = mdl_arritm( &world->ent_challenge, index );
 608       v3_copy( challenge->transform.co, closest );
 609    }
 610    else{
 611       vg_fatal_error( "Programming error\n" );
 612    }
 613 }
 614
 615 static void world_entity_start( world_instance *world, vg_msg *sav ){
 616    vg_info( "Start instance %p\n", world );
 617
 618    world->probabilities[ k_probability_curve_constant ] = 1.0f;
 619    for( u32 i=0; i<mdl_arrcount(&world->ent_audio); i++ ){
 620       ent_audio *audio = mdl_arritm(&world->ent_audio,i);
 621       if( audio->flags & AUDIO_FLAG_AUTO_START ){
 622          ent_call call;
 623          call.data = NULL;
 624          call.function = k_ent_function_trigger;
 625          call.id = mdl_entity_id( k_ent_audio, i );
 626          entity_call( world, &call );
 627       }
 628    }
 629
 630    /* read savedata
 631     * ----------------------------------------------------------------------- */
 632
 633    for( u32 i=0; i<mdl_arrcount(&world->ent_challenge); i++ ){
 634       ent_challenge *challenge = mdl_arritm( &world->ent_challenge, i );
 635       const char *alias = mdl_pstr( &world->meta, challenge->pstr_alias );
 636
 637       if( vg_msg_getkvu32( sav, alias, 0 ) ){
 638          ent_call call;
 639          call.data = NULL;
 640          call.function = 0;
 641          call.id = mdl_entity_id( k_ent_challenge, i );
 642          entity_call( world, &call );
 643       }
 644    }
 645
 646    vg_msg routes_block = *sav;
 647    if( vg_msg_seekframe( &routes_block, "routes" ) ){
 648       for( u32 i=0; i<mdl_arrcount(&world->ent_route); i++ ){
 649          ent_route *route = mdl_arritm( &world->ent_route, i );
 650
 651          vg_msg route_info = routes_block;
 652          if( vg_msg_seekframe( &route_info,
 653                                mdl_pstr(&world->meta,route->pstr_name) ) ){
 654             route->flags |= vg_msg_getkvu32( &route_info, "flags", 0 );
 655             route->best_laptime =
 656                vg_msg_getkvf64( &route_info, "best_laptime", 0.0 );
 657
 658             f32 sections[ route->checkpoints_count ];
 659             vg_msg_cmd cmd;
 660             if( vg_msg_getkvcmd( &route_info, "sections", &cmd ) ){
 661                vg_msg_cast( cmd.value, cmd.code, sections,
 662                             k_vg_msg_f32 |
 663                             vg_msg_count_bits(route->checkpoints_count) );
 664             }
 665             else{
 666                for( u32 j=0; j<route->checkpoints_count; j ++ )
 667                   sections[j] = 0.0f;
 668             }
 669
 670             for( u32 j=0; j<route->checkpoints_count; j ++ ){
 671                ent_checkpoint *cp = mdl_arritm( &world->ent_checkpoint,
 672                      route->checkpoints_start + j );
 673
 674                cp->best_time = sections[j];
 675             }
 676
 677             /* LEGACY: check if steam achievements can give us a medal */
 678             if( steam_ready && steam_stats_ready ){
 679                for( u32 j=0; j<vg_list_size(track_infos); j ++ ){
 680                   struct track_info *inf = &track_infos[j];
 681                   if( !strcmp(inf->name,
 682                               mdl_pstr(&world->meta,route->pstr_name))){
 683
 684                      steamapi_bool set = 0;
 685                      if( SteamAPI_ISteamUserStats_GetAchievement(
 686                               hSteamUserStats, inf->achievement_id, &set ) )
 687                      {
 688                         if( set ){
 689                            route->flags |= k_ent_route_flag_achieve_silver;
 690                         }
 691                      }
 692                   }
 693                }
 694             }
 695          }
 696       }
 697    }
 698
 699    ent_region_re_eval( world );
 700 }
 701
 702 static void world_entity_serialize( world_instance *world, vg_msg *sav ){
 703    for( u32 i=0; i<mdl_arrcount(&world->ent_challenge); i++ ){
 704       ent_challenge *challenge = mdl_arritm(&world->ent_challenge,i);
 705
 706       const char *alias = mdl_pstr(&world->meta,challenge->pstr_alias);
 707       vg_msg_wkvu32( sav, alias, challenge->status );
 708    }
 709
 710    if( mdl_arrcount(&world->ent_route) ){
 711       vg_msg_frame( sav, "routes" );
 712       for( u32 i=0; i<mdl_arrcount(&world->ent_route); i++ ){
 713          ent_route *route = mdl_arritm( &world->ent_route, i );
 714
 715          vg_msg_frame( sav, mdl_pstr( &world->meta, route->pstr_name ) );
 716          {
 717             vg_msg_wkvu32( sav, "flags", route->flags );
 718             vg_msg_wkvf64( sav, "best_laptime", route->best_laptime );
 719
 720             f32 sections[ route->checkpoints_count ];
 721
 722             for( u32 j=0; j<route->checkpoints_count; j ++ ){
 723                ent_checkpoint *cp = mdl_arritm( &world->ent_checkpoint,
 724                      route->checkpoints_start + j );
 725
 726                sections[j] = cp->best_time;
 727             }
 728
 729             vg_msg_wkvnum( sav, "sections", k_vg_msg_f32,
 730                            route->checkpoints_count, sections );
 731          }
 732          vg_msg_end_frame( sav );
 733       }
 734       vg_msg_end_frame( sav );
 735    }
 736 }
 737
 738 #endif /* WORLD_ENTITY_C */