world_gen.h

   1 /*
   2  * Copyright (C) 2021-2022 Mt.ZERO Software, Harry Godden - All Rights Reserved
   3  */
   4
   5 #ifndef WORLD_GEN_H
   6 #define WORLD_GEN_H
   7
   8 #include "world.h"
   9
  10 VG_STATIC void world_load( world_instance *world, const char *path );
  11
  12 VG_STATIC void world_add_all_if_material( m4x3f transform, scene *pscene,
  13                                           mdl_context *mdl, u32 id )
  14 {
  15    for( u32 i=0; i<mdl_arrcount(&mdl->meshs); i++ ){
  16       mdl_mesh *mesh = mdl_arritm( &mdl->meshs, i );
  17
  18       for( u32 j=0; j<mesh->submesh_count; j++ ){
  19          mdl_submesh *sm = mdl_arritm( &mdl->submeshs, mesh->submesh_start+j );
  20          if( sm->material_id == id ){
  21             m4x3f transform2;
  22             mdl_transform_m4x3( &mesh->transform, transform2 );
  23             m4x3_mul( transform, transform2, transform2 );
  24
  25             scene_add_mdl_submesh( pscene, mdl, sm, transform2 );
  26          }
  27       }
  28    }
  29 }
  30
  31 VG_STATIC void world_add_blob( world_instance *world,
  32                                scene *pscene, ray_hit *hit )
  33 {
  34    m4x3f transform;
  35    v4f qsurface, qrandom;
  36    v3f axis;
  37
  38    v3_cross( (v3f){0.0f,1.0f,0.0f}, hit->normal, axis );
  39
  40    float angle = v3_dot(hit->normal,(v3f){0.0f,1.0f,0.0f});
  41    q_axis_angle( qsurface, axis, angle );
  42    q_axis_angle( qrandom, (v3f){0.0f,1.0f,0.0f}, vg_randf()*VG_TAUf );
  43    q_mul( qsurface, qrandom, qsurface );
  44    q_m3x3( qsurface, transform );
  45    v3_copy( hit->pos, transform[3] );
  46
  47    scene_vert verts[] =
  48    {
  49       { .co = { -1.00f, 0.0f, 0.0f } },
  50       { .co = {  1.00f, 0.0f, 0.0f } },
  51       { .co = { -1.00f, 1.2f, 0.0f } },
  52       { .co = {  1.00f, 1.2f, 0.0f } },
  53       { .co = { -0.25f, 2.0f, 0.0f } },
  54       { .co = {  0.25f, 2.0f, 0.0f } }
  55    };
  56
  57    const u32 indices[] = { 0,1,3, 0,3,2, 2,3,5, 2,5,4 };
  58
  59    if( pscene->vertex_count + vg_list_size(verts) > pscene->max_vertices )
  60       vg_fatal_exit_loop( "Scene vertex buffer overflow" );
  61
  62    if( pscene->indice_count + vg_list_size(indices) > pscene->max_indices )
  63       vg_fatal_exit_loop( "Scene index buffer overflow" );
  64
  65    scene_vert *dst_verts = &pscene->arrvertices[ pscene->vertex_count ];
  66    u32 *dst_indices      = &pscene->arrindices [ pscene->indice_count ];
  67
  68    scene_vert *ref       = &world->scene_geo->arrvertices[ hit->tri[0] ];
  69
  70    for( u32 i=0; i<vg_list_size(verts); i++ )
  71    {
  72       scene_vert *pvert = &dst_verts[ i ],
  73                  *src   = &verts[ i ];
  74
  75       m4x3_mulv( transform, src->co, pvert->co );
  76       scene_vert_pack_norm( pvert, transform[1] );
  77
  78       v2_copy( ref->uv, pvert->uv );
  79    }
  80
  81    for( u32 i=0; i<vg_list_size(indices); i++ )
  82       dst_indices[i] = indices[i] + pscene->vertex_count;
  83
  84    pscene->vertex_count += vg_list_size(verts);
  85    pscene->indice_count += vg_list_size(indices);
  86 }
  87
  88 /* Sprinkle foliage models over the map on terrain material */
  89 VG_STATIC void world_apply_procedural_foliage( world_instance *world,
  90                                                struct world_surface *mat )
  91 {
  92    if( vg.quality_profile == k_quality_profile_low )
  93       return;
  94
  95    vg_info( "Applying foliage (%u)\n", mat->info.pstr_name );
  96
  97    v3f volume;
  98    v3_sub( world->scene_geo->bbx[1], world->scene_geo->bbx[0], volume );
  99    volume[1] = 1.0f;
 100
 101    int count = 0;
 102
 103    float area = volume[0]*volume[2];
 104    u32 particles = 0.08f * area;
 105
 106    vg_info( "Map area: %f. Max particles: %u\n", area, particles );
 107
 108    for( u32 i=0; i<particles; i++ ){
 109       v3f pos;
 110       v3_mul( volume, (v3f){ vg_randf(), 1000.0f, vg_randf() }, pos );
 111       pos[1] = 1000.0f;
 112       v3_add( pos, world->scene_geo->bbx[0], pos );
 113
 114       ray_hit hit;
 115       hit.dist = INFINITY;
 116
 117       if( ray_world( world, pos, (v3f){0.0f,-1.0f,0.0f}, &hit )){
 118          struct world_surface *m1 = ray_hit_surface( world, &hit );
 119          if((hit.normal[1] > 0.8f) && (m1 == mat) && (hit.pos[1] > 0.0f+10.0f)){
 120             world_add_blob( world, world->scene_no_collide, &hit );
 121             count ++;
 122          }
 123       }
 124    }
 125
 126    vg_info( "%d foliage models added\n", count );
 127 }
 128
 129
 130 #if 0
 131
 132 VG_STATIC void world_pct_audio( world_instance *world, mdl_node *pnode )
 133 {
 134    struct world_audio_thing *thing = &world->audio_things[
 135                                       world->audio_things_count ];
 136
 137    memset( thing, 0, sizeof(struct world_audio_thing) );
 138    struct classtype_audio *aud = mdl_get_entdata( world->meta, pnode );
 139
 140    v3_copy( pnode->co, thing->pos );
 141
 142    thing->volume = aud->volume;
 143    thing->range = pnode->s[0];
 144
 145    thing->flags = aud->flags;
 146    thing->temp_embedded_clip.path = mdl_pstr( world->meta, aud->pstr_file );
 147    thing->temp_embedded_clip.flags = aud->flags;
 148
 149    audio_clip_load( &thing->temp_embedded_clip, world_global.generic_heap );
 150
 151    pnode->sub_uid = world->audio_things_count;
 152    world->audio_things_count ++;
 153 }
 154
 155 VG_STATIC void world_pct_nonlocal_gate( world_instance *world, mdl_node *pnode )
 156 {
 157    struct nonlocal_gate *gate = &world->nonlocal_gates[
 158                                        world->nonlocalgate_count ++ ];
 159    struct classtype_gate *inf = mdl_get_entdata( world->meta, pnode );
 160
 161    gate->working = 0;
 162    gate->node = pnode;
 163    gate->target_map_index = 0;
 164    v2_copy( inf->dims, gate->gate.dims );
 165 }
 166
 167 VG_STATIC void world_link_nonlocal_gates( int index_a, int index_b )
 168 {
 169    vg_info( "Linking non-local gates\n" );
 170    world_instance *a = &world_global.worlds[ index_a ],
 171                   *b = &world_global.worlds[ index_b ];
 172
 173    for( int i=0; i<a->nonlocalgate_count; i++ )
 174    {
 175       struct nonlocal_gate *ga = &a->nonlocal_gates[i];
 176       struct classtype_gate *ga_inf = mdl_get_entdata( a->meta, ga->node );
 177       const char *ga_name = mdl_pstr( a->meta, ga_inf->target );
 178
 179       for( int j=0; j<b->nonlocalgate_count; j++ )
 180       {
 181          struct nonlocal_gate *gb = &b->nonlocal_gates[j];
 182          struct classtype_gate *gb_inf = mdl_get_entdata( b->meta, gb->node );
 183          const char *gb_name = mdl_pstr( b->meta, gb_inf->target );
 184
 185          if( !strcmp( ga_name, gb_name ) )
 186          {
 187             vg_success( "Created longjump for ID '%s'\n", ga_name );
 188
 189             v4f qYflip;
 190             q_axis_angle( qYflip, (v3f){0.0f,1.0f,0.0f}, VG_PIf );
 191
 192             /* TODO: Gates are created very wonkily. refactor. */
 193             ga->target_map_index = index_b;
 194             gb->target_map_index = index_a;
 195             ga->working = 1;
 196             gb->working = 1;
 197
 198             v4_copy( ga->node->q,  ga->gate.q[0] );
 199             v4_copy( gb->node->q,  ga->gate.q[1] );
 200             v3_copy( ga->node->co, ga->gate.co[0] );
 201             v3_copy( gb->node->co, ga->gate.co[1] );
 202
 203             v4_copy( gb->node->q,  gb->gate.q[0] );
 204             v4_copy( ga->node->q,  gb->gate.q[1] );
 205             v3_copy( gb->node->co, gb->gate.co[0] );
 206             v3_copy( ga->node->co, gb->gate.co[1] );
 207
 208             /* reverse B's direction */
 209             q_mul( gb->gate.q[0], qYflip, gb->gate.q[0] );
 210             q_mul( gb->gate.q[1], qYflip, gb->gate.q[1] );
 211             q_normalize( gb->gate.q[0] );
 212             q_normalize( gb->gate.q[1] );
 213
 214             gate_transform_update( &ga->gate );
 215             gate_transform_update( &gb->gate );
 216          }
 217       }
 218    }
 219 }
 220 #endif
 221
 222 VG_STATIC void world_generate( world_instance *world )
 223 {
 224    /*
 225     * Compile meshes into the world scenes
 226     */
 227    world->scene_geo = scene_init( world_global.generic_heap, 320000, 1200000 );
 228
 229    m4x3f midentity;
 230    m4x3_identity( midentity );
 231
 232    /*
 233     * Generate scene: collidable geometry
 234     * ----------------------------------------------------------------
 235     */
 236
 237    vg_info( "Generating collidable geometry\n" );
 238
 239    for( u32 i=0; i<world->surface_count; i++ ){
 240       struct world_surface *surf = &world->surfaces[ i ];
 241
 242       if( surf->info.flags & k_material_flag_collision )
 243          world_add_all_if_material( midentity, world->scene_geo,
 244                                     &world->meta, i );
 245
 246       scene_copy_slice( world->scene_geo, &surf->sm_geo );
 247    }
 248
 249    /* compress that bad boy */
 250    world->scene_geo = scene_fix( world_global.generic_heap, world->scene_geo );
 251
 252    vg_acquire_thread_sync();
 253    {
 254       scene_upload( world->scene_geo, &world->mesh_geo );
 255    }
 256    vg_release_thread_sync();
 257
 258    /* setup spacial mapping and rigidbody */
 259    world->geo_bh = scene_bh_create( world_global.generic_heap,
 260                                     world->scene_geo );
 261
 262    v3_zero( world->rb_geo.co );
 263    q_identity( world->rb_geo.q );
 264
 265    world->rb_geo.type = k_rb_shape_scene;
 266    world->rb_geo.inf.scene.bh_scene = world->geo_bh;
 267    world->rb_geo.is_world = 1;
 268    rb_init( &world->rb_geo );
 269
 270    /*
 271     * Generate scene: non-collidable geometry
 272     * ----------------------------------------------------------------
 273     */
 274    vg_info( "Generating non-collidable geometry\n" );
 275
 276    world->scene_no_collide = scene_init( world_global.generic_heap,
 277                                          200000, 500000 );
 278
 279    for( u32 i=0; i<world->surface_count; i++ ){
 280       struct world_surface *mat = &world->surfaces[ i ];
 281
 282       if( !(mat->info.flags & k_material_flag_collision) ){
 283          world_add_all_if_material( midentity, world->scene_no_collide,
 284                                     &world->meta, i );
 285       }
 286
 287       if( mat->info.flags & k_material_flag_grow_grass )
 288          world_apply_procedural_foliage( world, mat );
 289
 290       scene_copy_slice( world->scene_no_collide, &mat->sm_no_collide );
 291    }
 292
 293    /* upload and free that */
 294    vg_acquire_thread_sync();
 295    {
 296       scene_upload( world->scene_no_collide, &world->mesh_no_collide );
 297    }
 298    vg_release_thread_sync();
 299
 300    vg_linear_del( world_global.generic_heap, world->scene_no_collide );
 301    world->scene_no_collide = NULL;
 302 }
 303
 304 float fsd_cone_infinite( v3f p, v2f c )
 305 {
 306    v2f q = { v2_length( (v2f){ p[0], p[2] } ), -p[1] };
 307    float s = vg_maxf( 0.0f, v2_dot( q, c ) );
 308
 309    v2f v0;
 310    v2_muls( c, s, v0 );
 311    v2_sub( q, v0, v0 );
 312
 313    float d = v2_length( v0 );
 314    return d * ((q[0]*c[1]-q[1]*c[0]<0.0f)?-1.0f:1.0f);
 315 }
 316
 317 VG_STATIC void world_compute_light_indices( world_instance *world )
 318 {
 319    /* light cubes */
 320    v3f cubes_min, cubes_max;
 321    v3_muls( world->scene_geo->bbx[0], 1.0f/k_light_cube_size, cubes_min );
 322    v3_muls( world->scene_geo->bbx[1], 1.0f/k_light_cube_size, cubes_max );
 323
 324    v3_sub( cubes_min, (v3f){ 0.5f, 0.5f, 0.5f }, cubes_min );
 325    v3_add( cubes_max, (v3f){ 0.5f, 0.5f, 0.5f }, cubes_max );
 326
 327    v3_floor( cubes_min, cubes_min );
 328    v3_floor( cubes_max, cubes_max );
 329
 330    v3i icubes_min, icubes_max;
 331
 332    for( int i=0; i<3; i++ ){
 333       icubes_min[i] = cubes_min[i];
 334       icubes_max[i] = cubes_max[i];
 335    }
 336
 337    v3i icubes_count;
 338    v3i_sub( icubes_max, icubes_min, icubes_count );
 339
 340    for( int i=0; i<3; i++ ){
 341       icubes_count[i] = VG_MIN( 128, icubes_count[i]+1 );
 342       cubes_max[i] = icubes_min[i] + icubes_count[i];
 343    }
 344
 345    v3_muls( cubes_min, k_light_cube_size, cubes_min );
 346    v3_muls( cubes_max, k_light_cube_size, cubes_max );
 347
 348    for( int i=0; i<3; i++ ){
 349       float range = cubes_max[i]-cubes_min[i];
 350       world->ub_lighting.g_cube_inv_range[i] = 1.0f / range;
 351       world->ub_lighting.g_cube_inv_range[i] *= (float)icubes_count[i];
 352
 353       vg_info( "cubes[%d]: %d\n", i, icubes_count[i] );
 354    }
 355
 356    int total_cubes = icubes_count[0]*icubes_count[1]*icubes_count[2];
 357
 358    u32 *cubes_index = vg_linear_alloc( world_global.generic_heap,
 359                                        total_cubes * sizeof(u32) * 2.0f );
 360
 361    vg_info( "Computing light cubes (%d) [%f %f %f] -> [%f %f %f]\n",
 362              total_cubes, cubes_min[0], -cubes_min[2], cubes_min[1],
 363                           cubes_max[0], -cubes_max[2], cubes_max[1] );
 364
 365    v3_copy( cubes_min, world->ub_lighting.g_cube_min );
 366
 367    v3f cube_size;
 368    v3_div( (v3f){1.0f,1.0f,1.0f}, world->ub_lighting.g_cube_inv_range,
 369             cube_size );
 370    float bound_radius = v3_length( cube_size );
 371
 372    for( int iz = 0; iz<icubes_count[2]; iz ++ ){
 373       for( int iy = 0; iy<icubes_count[1]; iy++ ){
 374          for( int ix = 0; ix<icubes_count[0]; ix++ ){
 375             boxf bbx;
 376             v3_div( (v3f){ ix, iy, iz }, world->ub_lighting.g_cube_inv_range,
 377                   bbx[0] );
 378             v3_div( (v3f){ ix+1, iy+1, iz+1 },
 379                   world->ub_lighting.g_cube_inv_range,
 380                   bbx[1] );
 381
 382             v3_add( bbx[0], world->ub_lighting.g_cube_min, bbx[0] );
 383             v3_add( bbx[1], world->ub_lighting.g_cube_min, bbx[1] );
 384
 385             v3f center;
 386             v3_add( bbx[0], bbx[1], center );
 387             v3_muls( center, 0.5f, center );
 388
 389             u32 indices[6] = { 0, 0, 0, 0, 0, 0 };
 390             u32 count = 0;
 391
 392             float influences[6] = { 0.0f, 0.0f, 0.0f, 0.0f, 0.0f, 0.0f };
 393             const int N = vg_list_size( influences );
 394
 395             for( u32 j=0; j<mdl_arrcount(&world->ent_light); j ++ ){
 396                ent_light *light = mdl_arritm( &world->ent_light, j );
 397                v3f closest;
 398                closest_point_aabb( light->transform.co, bbx, closest );
 399
 400                float dist = v3_dist( closest, light->transform.co ),
 401                      influence = 1.0f/(dist+1.0f);
 402
 403                if( dist > light->range )
 404                   continue;
 405
 406                if( light->type == k_light_type_spot){
 407                   v3f local;
 408                   m4x3_mulv( light->inverse_world, center, local );
 409
 410                   float r = fsd_cone_infinite( local, light->angle_sin_cos );
 411
 412                   if( r > bound_radius )
 413                      continue;
 414                }
 415
 416                int best_pos = N;
 417                for( int k=best_pos-1; k>=0; k -- )
 418                   if( influence > influences[k] )
 419                      best_pos = k;
 420
 421                if( best_pos < N ){
 422                   for( int k=N-1; k>best_pos; k -- ){
 423                      influences[k] = influences[k-1];
 424                      indices[k] = indices[k-1];
 425                   }
 426
 427                   influences[best_pos] = influence;
 428                   indices[best_pos] = j;
 429                }
 430             }
 431
 432             for( int j=0; j<N; j++ )
 433                if( influences[j] > 0.0f )
 434                   count ++;
 435
 436             int base_index = iz * (icubes_count[0]*icubes_count[1]) +
 437                              iy * (icubes_count[0]) +
 438                              ix;
 439
 440             int lower_count = VG_MIN( 3, count );
 441             u32 packed_index_lower = lower_count;
 442             packed_index_lower |= indices[0]<<2;
 443             packed_index_lower |= indices[1]<<12;
 444             packed_index_lower |= indices[2]<<22;
 445
 446             int upper_count = VG_MAX( 0, count - lower_count );
 447             u32 packed_index_upper = upper_count;
 448             packed_index_upper |= indices[3]<<2;
 449             packed_index_upper |= indices[4]<<12;
 450             packed_index_upper |= indices[5]<<22;
 451
 452             cubes_index[ base_index*2 + 0 ] = packed_index_lower;
 453             cubes_index[ base_index*2 + 1 ] = packed_index_upper;
 454          }
 455       }
 456    }
 457
 458    vg_acquire_thread_sync();
 459
 460    glGenTextures( 1, &world->tex_light_cubes );
 461    glBindTexture( GL_TEXTURE_3D, world->tex_light_cubes );
 462    glTexImage3D( GL_TEXTURE_3D, 0, GL_RG32UI,
 463                  icubes_count[0], icubes_count[1], icubes_count[2],
 464                  0, GL_RG_INTEGER, GL_UNSIGNED_INT, cubes_index );
 465    glTexParameteri( GL_TEXTURE_3D, GL_TEXTURE_MIN_FILTER, GL_NEAREST );
 466    glTexParameteri( GL_TEXTURE_3D, GL_TEXTURE_MAG_FILTER, GL_NEAREST );
 467
 468    vg_linear_del( world_global.generic_heap, cubes_index );
 469
 470    vg_release_thread_sync();
 471 }
 472
 473 VG_STATIC int reset_player( int argc, char const *argv[] );
 474 VG_STATIC void world_post_process( world_instance *world )
 475 {
 476    /* initialize audio if need be */
 477 #if 0
 478    audio_lock();
 479    for( int i=0; i<world->audio_things_count; i++ )
 480    {
 481       struct world_audio_thing *thingy = &world->audio_things[ i ];
 482
 483       if( thingy->flags & AUDIO_FLAG_AUTO_START )
 484       {
 485          audio_channel *ch =
 486             audio_request_channel( &thingy->temp_embedded_clip, thingy->flags );
 487
 488          audio_channel_edit_volume( ch, thingy->volume, 1 );
 489          audio_channel_set_spacial( ch, thingy->pos, thingy->range );
 490
 491          if( !(ch->flags & AUDIO_FLAG_LOOP) )
 492             ch = audio_relinquish_channel( ch );
 493       }
 494    }
 495    audio_unlock();
 496 #endif
 497
 498    world_compute_light_indices( world );
 499
 500    vg_acquire_thread_sync();
 501    {
 502       /* create scene lighting buffer */
 503
 504       u32 size = VG_MAX(mdl_arrcount(&world->ent_light),1) * sizeof(float)*12;
 505       vg_info( "Upload %ubytes (lighting)\n", size );
 506
 507       glGenBuffers( 1, &world->tbo_light_entities );
 508       glBindBuffer( GL_TEXTURE_BUFFER, world->tbo_light_entities );
 509       glBufferData( GL_TEXTURE_BUFFER, size, NULL, GL_DYNAMIC_DRAW );
 510
 511       /* buffer layout
 512        *
 513        *  colour               position                direction (spots)
 514        * | .   .   .   .     | .   .   .   .         | .   .   .   .  |
 515        * | Re  Ge  Be  Night | Xco Yco Zco Range     | Dx  Dy  Dz  Da |
 516        *
 517        */
 518
 519       v4f *light_dst = glMapBuffer( GL_TEXTURE_BUFFER, GL_WRITE_ONLY );
 520       for( u32 i=0; i<mdl_arrcount(&world->ent_light); i++ ){
 521          ent_light *light = mdl_arritm( &world->ent_light, i );
 522
 523          /* colour  + night */
 524          v3_muls( light->colour, light->colour[3] * 2.0f, light_dst[i*3+0] );
 525          light_dst[i*3+0][3] = -1.0f;
 526
 527          if( !light->daytime ){
 528             u32 hash = (i * 29986577) & 0xff;
 529             float switch_on = hash;
 530                   switch_on *= (1.0f/255.0f);
 531
 532             light_dst[i*3+0][3] = 0.44f + switch_on * 0.015f;
 533          }
 534
 535          /* position + 1/range^2 */
 536          v3_copy( light->transform.co, light_dst[i*3+1] );
 537          light_dst[i*3+1][3] = 1.0f/(light->range*light->range);
 538
 539          /* direction + angle */
 540          q_mulv( light->transform.q, (v3f){0.0f,-1.0f,0.0f}, light_dst[i*3+2]);
 541          light_dst[i*3+2][3] = cosf( light->angle );
 542       }
 543
 544       glUnmapBuffer( GL_TEXTURE_BUFFER );
 545
 546       glGenTextures( 1, &world->tex_light_entities );
 547       glBindTexture( GL_TEXTURE_BUFFER, world->tex_light_entities );
 548       glTexBuffer( GL_TEXTURE_BUFFER, GL_RGBA32F, world->tbo_light_entities );
 549
 550       /* Upload lighting uniform buffer */
 551       if( world->water.enabled )
 552          v4_copy( world->water.plane, world->ub_lighting.g_water_plane );
 553
 554       v4f info_vec;
 555       v3f *bounds = world->scene_geo->bbx;
 556
 557       info_vec[0] = bounds[0][0];
 558       info_vec[1] = bounds[0][2];
 559       info_vec[2] = 1.0f/ (bounds[1][0]-bounds[0][0]);
 560       info_vec[3] = 1.0f/ (bounds[1][2]-bounds[0][2]);
 561       v4_copy( info_vec, world->ub_lighting.g_depth_bounds );
 562
 563       /*
 564        * Rendering the depth map
 565        */
 566       camera ortho;
 567
 568       v3f extent;
 569       v3_sub( world->scene_geo->bbx[1], world->scene_geo->bbx[0], extent );
 570
 571       float fl = world->scene_geo->bbx[0][0],
 572             fr = world->scene_geo->bbx[1][0],
 573             fb = world->scene_geo->bbx[0][2],
 574             ft = world->scene_geo->bbx[1][2],
 575             rl = 1.0f / (fr-fl),
 576             tb = 1.0f / (ft-fb);
 577
 578       m4x4_zero( ortho.mtx.p );
 579       ortho.mtx.p[0][0] = 2.0f * rl;
 580       ortho.mtx.p[2][1] = 2.0f * tb;
 581       ortho.mtx.p[3][0] = (fr + fl) * -rl;
 582       ortho.mtx.p[3][1] = (ft + fb) * -tb;
 583       ortho.mtx.p[3][3] = 1.0f;
 584       m4x3_identity( ortho.transform );
 585       camera_update_view( &ortho );
 586       camera_finalize( &ortho );
 587
 588       glDisable(GL_DEPTH_TEST);
 589       glDisable(GL_BLEND);
 590       glDisable(GL_CULL_FACE);
 591       render_fb_bind( &world->heightmap );
 592       shader_blitcolour_use();
 593       shader_blitcolour_uColour( (v4f){-9999.0f,-9999.0f,-9999.0f,-9999.0f} );
 594       render_fsquad();
 595
 596       glEnable(GL_BLEND);
 597       glBlendFunc(GL_ONE, GL_ONE);
 598       glBlendEquation(GL_MAX);
 599
 600       render_world_position( world, &ortho );
 601       glDisable(GL_BLEND);
 602       glEnable(GL_DEPTH_TEST);
 603       glBindFramebuffer( GL_FRAMEBUFFER, 0 );
 604
 605       /* upload full buffer */
 606       glBindBuffer( GL_UNIFORM_BUFFER, world->ubo_lighting );
 607       glBufferSubData( GL_UNIFORM_BUFFER, 0,
 608                        sizeof(struct ub_world_lighting), &world->ub_lighting );
 609    }
 610
 611    vg_release_thread_sync();
 612
 613 #if 0
 614    /*
 615     * Setup scene collider
 616     */
 617    reset_player( 1, (const char *[]){"start"} );
 618 #endif
 619 }
 620
 621 VG_STATIC void world_process_resources( world_instance *world )
 622 {
 623    vg_info( "Loading textures\n" );
 624
 625    world->texture_count = 0;
 626
 627    world->texture_count = world->meta.textures.count+1;
 628    world->textures = vg_linear_alloc( world_global.generic_heap,
 629                                       sizeof(GLuint)*world->texture_count );
 630
 631    vg_acquire_thread_sync();
 632    {
 633       /* error texture */
 634       world->textures[0] = vg_tex2d_new();
 635       vg_tex2d_set_error();
 636       vg_tex2d_nearest();
 637       vg_tex2d_repeat();
 638
 639       for( u32 i=0; i<mdl_arrcount(&world->meta.textures); i++ ){
 640          mdl_texture *tex = mdl_arritm( &world->meta.textures, i );
 641
 642          if( !tex->file.pack_size ){
 643             vg_release_thread_sync();
 644             vg_fatal_exit_loop( "World models must have packed textures!" );
 645          }
 646
 647          vg_linear_clear( vg_mem.scratch );
 648          world->textures[i+1] = vg_tex2d_new();
 649          vg_tex2d_set_error();
 650          vg_tex2d_qoi( mdl_arritm( &world->meta.pack, tex->file.pack_offset ),
 651                        tex->file.pack_size,
 652                        mdl_pstr( &world->meta, tex->file.pstr_path ));
 653          vg_tex2d_nearest();
 654          vg_tex2d_repeat();
 655       }
 656    }
 657    vg_release_thread_sync();
 658
 659    vg_info( "Loading materials\n" );
 660
 661    world->surface_count = world->meta.materials.count+1;
 662    world->surfaces = vg_linear_alloc( world_global.generic_heap,
 663                            sizeof(struct world_surface)*world->surface_count );
 664
 665    /* error material */
 666    struct world_surface *errmat = &world->surfaces[0];
 667    memset( errmat, 0, sizeof(struct world_surface) );
 668
 669    for( u32 i=0; i<mdl_arrcount(&world->meta.materials); i++ ){
 670       world->surfaces[i+1].info =
 671          *(mdl_material *)mdl_arritm( &world->meta.materials, i );
 672    }
 673 }
 674
 675 VG_STATIC void world_unload( world_instance *world )
 676 {
 677    vg_acquire_thread_sync();
 678
 679    /* free meshes */
 680    mesh_free( &world->mesh_route_lines );
 681    mesh_free( &world->mesh_geo );
 682    mesh_free( &world->mesh_no_collide );
 683
 684    /* glDeleteBuffers silently ignores 0's and names that do not correspond to
 685     * existing buffer objects.
 686     * */
 687    glDeleteBuffers( 1, &world->tbo_light_entities );
 688    glDeleteTextures( 1, &world->tex_light_entities );
 689    glDeleteTextures( 1, &world->tex_light_cubes );
 690
 691    /* FIXME: CANT DO THIS HERE */
 692    /*        whynot? */
 693    /*        oh this should be moved to a global function */
 694    world_global.time = 0.0;
 695    world_global.rewind_from = 0.0;
 696    world_global.rewind_to = 0.0;
 697    world_global.last_use = 0.0;
 698    world_global.sfd.active_route_board = 0;
 699
 700    /* delete textures and meshes */
 701    glDeleteTextures( world->texture_count, world->textures );
 702
 703    /* delete the entire block of memory */
 704    /* FIXME: WE CANT DO THIS SHIT ANYMORE, NEED TO DEALLOC FROM ABOVE */
 705 #if 0
 706    vg_linear_clear( world->dynamic_vgl );
 707    vg_linear_clear( world->audio_vgl );
 708 #endif
 709
 710    vg_release_thread_sync();
 711 }
 712
 713 VG_STATIC void world_clean( world_instance *world )
 714 {
 715    memset( &world->meta, 0, sizeof(mdl_context) );
 716
 717    /*
 718     * TODO: Theres probably a better way to do this? */
 719    /*       yep, find all members that can be memsetted to 0. this is probably
 720     *       every member anyway, given the below is just setting to 0
 721     *
 722     *       also: rename clean to init? */
 723
 724    world->textures = NULL;
 725    world->texture_count = 0;
 726    world->surfaces = NULL;
 727    world->surface_count = 0;
 728
 729    world->scene_geo = NULL;
 730    world->scene_no_collide = NULL;
 731    world->scene_lines = NULL;
 732
 733    world->geo_bh = NULL;
 734    world->volume_bh = NULL;
 735    world->audio_bh = NULL;
 736    world->rendering_gate = NULL;
 737
 738    world->water.enabled = 0;
 739
 740    /* default lighting conditions
 741     * -------------------------------------------------------------*/
 742    struct ub_world_lighting *state = &world->ub_lighting;
 743
 744    state->g_light_preview = 0;
 745    state->g_shadow_samples = 8;
 746    state->g_water_fog = 0.04f;
 747
 748    v4_zero( state->g_water_plane );
 749    v4_zero( state->g_depth_bounds );
 750
 751    state->g_shadow_length = 9.50f;
 752    state->g_shadow_spread = 0.65f;
 753
 754    v3_copy( (v3f){0.37f, 0.54f, 0.97f}, state->g_daysky_colour );
 755    v3_copy( (v3f){0.03f, 0.05f, 0.20f}, state->g_nightsky_colour );
 756    v3_copy( (v3f){1.00f, 0.32f, 0.01f}, state->g_sunset_colour );
 757    v3_copy( (v3f){0.13f, 0.17f, 0.35f}, state->g_ambient_colour );
 758    v3_copy( (v3f){0.25f, 0.17f, 0.51f}, state->g_sunset_ambient );
 759    v3_copy( (v3f){1.10f, 0.89f, 0.35f}, state->g_sun_colour );
 760 }
 761
 762 VG_STATIC void world_entities_init( world_instance *world )
 763 {
 764    /* lights */
 765    for( u32 j=0; j<mdl_arrcount(&world->ent_light); j ++ ){
 766       ent_light *light = mdl_arritm( &world->ent_light, j );
 767
 768       m4x3f to_world;
 769       q_m3x3( light->transform.q, to_world );
 770       v3_copy( light->transform.co, to_world[3] );
 771       m4x3_invert_affine( to_world, light->inverse_world );
 772
 773       light->angle_sin_cos[0] = sinf( light->angle * 0.5f );
 774       light->angle_sin_cos[1] = cosf( light->angle * 0.5f );
 775    }
 776
 777    /* gates */
 778    for( u32 j=0; j<mdl_arrcount(&world->ent_gate); j ++ ){
 779       ent_gate *gate = mdl_arritm( &world->ent_gate, j );
 780       gate_transform_update( gate );
 781    }
 782
 783    /* water */
 784    for( u32 j=0; j<mdl_arrcount(&world->ent_water); j++ ){
 785       ent_water *water = mdl_arritm( &world->ent_water, j );
 786       if( world->water.enabled ){
 787          vg_warn( "Multiple water surfaces in level!\n" );
 788          break;
 789       }
 790
 791       world->water.enabled = 1;
 792       water_set_surface( world, water->transform.co[1] );
 793    }
 794 }
 795
 796 VG_STATIC void world_load( world_instance *world, const char *path )
 797 {
 798    world_unload( world );
 799    world_clean( world );
 800
 801    vg_info( "Loading world: %s\n", path );
 802
 803    mdl_open( &world->meta, path, world_global.generic_heap );
 804    mdl_load_metadata_block( &world->meta, world_global.generic_heap );
 805    mdl_load_animation_block( &world->meta, world_global.generic_heap );
 806    mdl_load_mesh_block( &world->meta, world_global.generic_heap );
 807    mdl_load_pack_block( &world->meta, world_global.generic_heap );
 808
 809    mdl_load_array( &world->meta, &world->ent_gate,
 810                    "ent_gate", world_global.generic_heap );
 811    mdl_load_array( &world->meta, &world->ent_spawn,
 812                    "ent_spawn", world_global.generic_heap );
 813    mdl_load_array( &world->meta, &world->ent_light,
 814                    "ent_light", world_global.generic_heap );
 815
 816    mdl_load_array( &world->meta, &world->ent_route_node,
 817                    "ent_route_node", world_global.generic_heap );
 818    mdl_load_array( &world->meta, &world->ent_path_index,
 819                    "ent_path_index", world_global.generic_heap );
 820    mdl_load_array( &world->meta, &world->ent_checkpoint,
 821                    "ent_checkpoint", world_global.generic_heap );
 822    mdl_load_array( &world->meta, &world->ent_route,
 823                    "ent_route", world_global.generic_heap );
 824    mdl_load_array( &world->meta, &world->ent_water,
 825                    "ent_water", world_global.generic_heap );
 826
 827    mdl_close( &world->meta );
 828
 829    /* process resources from pack */
 830    world_process_resources( world );
 831
 832 #if 0
 833    /* dynamic allocations */
 834    world_ents_allocate( world );
 835    world_routes_allocate( world );
 836
 837    /* meta processing */
 838 #endif
 839    world_routes_ent_init( world );
 840    world_entities_init( world );
 841
 842    /* main bulk */
 843    world_generate( world );
 844    world_routes_generate( world );
 845    world_post_process( world );
 846 }
 847
 848 #endif /* WORLD_GEN_H */