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 VG_STATIC void world_generate( world_instance *world )
 130 {
 131    /*
 132     * Compile meshes into the world scenes
 133     */
 134    world->scene_geo = scene_init( world_global.generic_heap, 320000, 1200000 );
 135
 136    m4x3f midentity;
 137    m4x3_identity( midentity );
 138
 139    /*
 140     * Generate scene: collidable geometry
 141     * ----------------------------------------------------------------
 142     */
 143
 144    vg_info( "Generating collidable geometry\n" );
 145
 146    for( u32 i=0; i<world->surface_count; i++ ){
 147       struct world_surface *surf = &world->surfaces[ i ];
 148
 149       if( surf->info.flags & k_material_flag_collision )
 150          world_add_all_if_material( midentity, world->scene_geo,
 151                                     &world->meta, i );
 152
 153       scene_copy_slice( world->scene_geo, &surf->sm_geo );
 154    }
 155
 156    /* compress that bad boy */
 157    world->scene_geo = scene_fix( world_global.generic_heap, world->scene_geo );
 158
 159    vg_acquire_thread_sync();
 160    {
 161       scene_upload( world->scene_geo, &world->mesh_geo );
 162    }
 163    vg_release_thread_sync();
 164
 165    /* setup spacial mapping and rigidbody */
 166    world->geo_bh = scene_bh_create( world_global.generic_heap,
 167                                     world->scene_geo );
 168
 169    v3_zero( world->rb_geo.co );
 170    q_identity( world->rb_geo.q );
 171
 172    world->rb_geo.type = k_rb_shape_scene;
 173    world->rb_geo.inf.scene.bh_scene = world->geo_bh;
 174    world->rb_geo.is_world = 1;
 175    rb_init( &world->rb_geo );
 176
 177    /*
 178     * Generate scene: non-collidable geometry
 179     * ----------------------------------------------------------------
 180     */
 181    vg_info( "Generating non-collidable geometry\n" );
 182
 183    world->scene_no_collide = scene_init( world_global.generic_heap,
 184                                          200000, 500000 );
 185
 186    for( u32 i=0; i<world->surface_count; i++ ){
 187       struct world_surface *mat = &world->surfaces[ i ];
 188
 189       if( !(mat->info.flags & k_material_flag_collision) ){
 190          world_add_all_if_material( midentity, world->scene_no_collide,
 191                                     &world->meta, i );
 192       }
 193
 194       if( mat->info.flags & k_material_flag_grow_grass )
 195          world_apply_procedural_foliage( world, mat );
 196
 197       scene_copy_slice( world->scene_no_collide, &mat->sm_no_collide );
 198    }
 199
 200    /* upload and free that */
 201    vg_acquire_thread_sync();
 202    {
 203       scene_upload( world->scene_no_collide, &world->mesh_no_collide );
 204    }
 205    vg_release_thread_sync();
 206
 207    vg_linear_del( world_global.generic_heap, world->scene_no_collide );
 208    world->scene_no_collide = NULL;
 209 }
 210
 211 float fsd_cone_infinite( v3f p, v2f c )
 212 {
 213    v2f q = { v2_length( (v2f){ p[0], p[2] } ), -p[1] };
 214    float s = vg_maxf( 0.0f, v2_dot( q, c ) );
 215
 216    v2f v0;
 217    v2_muls( c, s, v0 );
 218    v2_sub( q, v0, v0 );
 219
 220    float d = v2_length( v0 );
 221    return d * ((q[0]*c[1]-q[1]*c[0]<0.0f)?-1.0f:1.0f);
 222 }
 223
 224 VG_STATIC void world_compute_light_indices( world_instance *world )
 225 {
 226    /* light cubes */
 227    v3f cubes_min, cubes_max;
 228    v3_muls( world->scene_geo->bbx[0], 1.0f/k_light_cube_size, cubes_min );
 229    v3_muls( world->scene_geo->bbx[1], 1.0f/k_light_cube_size, cubes_max );
 230
 231    v3_sub( cubes_min, (v3f){ 0.5f, 0.5f, 0.5f }, cubes_min );
 232    v3_add( cubes_max, (v3f){ 0.5f, 0.5f, 0.5f }, cubes_max );
 233
 234    v3_floor( cubes_min, cubes_min );
 235    v3_floor( cubes_max, cubes_max );
 236
 237    v3i icubes_min, icubes_max;
 238
 239    for( int i=0; i<3; i++ ){
 240       icubes_min[i] = cubes_min[i];
 241       icubes_max[i] = cubes_max[i];
 242    }
 243
 244    v3f cube_size;
 245
 246    v3i icubes_count;
 247    v3i_sub( icubes_max, icubes_min, icubes_count );
 248
 249    for( int i=0; i<3; i++ ){
 250       int clamped_count = VG_MIN( 128, icubes_count[i]+1 );
 251       float clamped_max = icubes_min[i] + clamped_count,
 252                     max = icubes_min[i] + icubes_count[i]+1;
 253
 254       icubes_count[i] = clamped_count;
 255       cube_size[i] = (max / clamped_max) * k_light_cube_size;
 256       cubes_max[i] = clamped_max;
 257    }
 258
 259    v3_mul( cubes_min, cube_size, cubes_min );
 260    v3_mul( cubes_max, cube_size, cubes_max );
 261
 262    for( int i=0; i<3; i++ ){
 263       float range = cubes_max[i]-cubes_min[i];
 264       world->ub_lighting.g_cube_inv_range[i] = 1.0f / range;
 265       world->ub_lighting.g_cube_inv_range[i] *= (float)icubes_count[i];
 266
 267       vg_info( "cubes[%d]: %d\n", i, icubes_count[i] );
 268    }
 269
 270    int total_cubes = icubes_count[0]*icubes_count[1]*icubes_count[2];
 271
 272    u32 *cubes_index = vg_linear_alloc( world_global.generic_heap,
 273                                        vg_align8(total_cubes*sizeof(u32)*2) );
 274
 275    vg_info( "Computing light cubes (%d) [%f %f %f] -> [%f %f %f]\n",
 276              total_cubes, cubes_min[0], -cubes_min[2], cubes_min[1],
 277                           cubes_max[0], -cubes_max[2], cubes_max[1] );
 278    v3_copy( cubes_min, world->ub_lighting.g_cube_min );
 279
 280    float bound_radius = v3_length( cube_size );
 281
 282    for( int iz = 0; iz<icubes_count[2]; iz ++ ){
 283       for( int iy = 0; iy<icubes_count[1]; iy++ ){
 284          for( int ix = 0; ix<icubes_count[0]; ix++ ){
 285             boxf bbx;
 286             v3_div( (v3f){ ix, iy, iz }, world->ub_lighting.g_cube_inv_range,
 287                   bbx[0] );
 288             v3_div( (v3f){ ix+1, iy+1, iz+1 },
 289                   world->ub_lighting.g_cube_inv_range,
 290                   bbx[1] );
 291
 292             v3_add( bbx[0], world->ub_lighting.g_cube_min, bbx[0] );
 293             v3_add( bbx[1], world->ub_lighting.g_cube_min, bbx[1] );
 294
 295             v3f center;
 296             v3_add( bbx[0], bbx[1], center );
 297             v3_muls( center, 0.5f, center );
 298
 299             u32 indices[6] = { 0, 0, 0, 0, 0, 0 };
 300             u32 count = 0;
 301
 302             float influences[6] = { 0.0f, 0.0f, 0.0f, 0.0f, 0.0f, 0.0f };
 303             const int N = vg_list_size( influences );
 304
 305             for( u32 j=0; j<mdl_arrcount(&world->ent_light); j ++ ){
 306                ent_light *light = mdl_arritm( &world->ent_light, j );
 307                v3f closest;
 308                closest_point_aabb( light->transform.co, bbx, closest );
 309
 310                float dist = v3_dist( closest, light->transform.co ),
 311                      influence = 1.0f/(dist+1.0f);
 312
 313                if( dist > light->range )
 314                   continue;
 315
 316                if( light->type == k_light_type_spot){
 317                   v3f local;
 318                   m4x3_mulv( light->inverse_world, center, local );
 319
 320                   float r = fsd_cone_infinite( local, light->angle_sin_cos );
 321
 322                   if( r > bound_radius )
 323                      continue;
 324                }
 325
 326                int best_pos = N;
 327                for( int k=best_pos-1; k>=0; k -- )
 328                   if( influence > influences[k] )
 329                      best_pos = k;
 330
 331                if( best_pos < N ){
 332                   for( int k=N-1; k>best_pos; k -- ){
 333                      influences[k] = influences[k-1];
 334                      indices[k] = indices[k-1];
 335                   }
 336
 337                   influences[best_pos] = influence;
 338                   indices[best_pos] = j;
 339                }
 340             }
 341
 342             for( int j=0; j<N; j++ )
 343                if( influences[j] > 0.0f )
 344                   count ++;
 345
 346             int base_index = iz * (icubes_count[0]*icubes_count[1]) +
 347                              iy * (icubes_count[0]) +
 348                              ix;
 349
 350             int lower_count = VG_MIN( 3, count );
 351             u32 packed_index_lower = lower_count;
 352             packed_index_lower |= indices[0]<<2;
 353             packed_index_lower |= indices[1]<<12;
 354             packed_index_lower |= indices[2]<<22;
 355
 356             int upper_count = VG_MAX( 0, count - lower_count );
 357             u32 packed_index_upper = upper_count;
 358             packed_index_upper |= indices[3]<<2;
 359             packed_index_upper |= indices[4]<<12;
 360             packed_index_upper |= indices[5]<<22;
 361
 362             cubes_index[ base_index*2 + 0 ] = packed_index_lower;
 363             cubes_index[ base_index*2 + 1 ] = packed_index_upper;
 364          }
 365       }
 366    }
 367
 368    vg_acquire_thread_sync();
 369
 370    glGenTextures( 1, &world->tex_light_cubes );
 371    glBindTexture( GL_TEXTURE_3D, world->tex_light_cubes );
 372    glTexImage3D( GL_TEXTURE_3D, 0, GL_RG32UI,
 373                  icubes_count[0], icubes_count[1], icubes_count[2],
 374                  0, GL_RG_INTEGER, GL_UNSIGNED_INT, cubes_index );
 375    glTexParameteri( GL_TEXTURE_3D, GL_TEXTURE_MIN_FILTER, GL_NEAREST );
 376    glTexParameteri( GL_TEXTURE_3D, GL_TEXTURE_MAG_FILTER, GL_NEAREST );
 377
 378    vg_linear_del( world_global.generic_heap, cubes_index );
 379
 380    vg_release_thread_sync();
 381 }
 382
 383 VG_STATIC int reset_player( int argc, char const *argv[] );
 384 VG_STATIC void world_post_process( world_instance *world )
 385 {
 386    /* initialize audio if need be */
 387 #if 0
 388    audio_lock();
 389    for( int i=0; i<world->audio_things_count; i++ )
 390    {
 391       struct world_audio_thing *thingy = &world->audio_things[ i ];
 392
 393       if( thingy->flags & AUDIO_FLAG_AUTO_START )
 394       {
 395          audio_channel *ch =
 396             audio_request_channel( &thingy->temp_embedded_clip, thingy->flags );
 397
 398          audio_channel_edit_volume( ch, thingy->volume, 1 );
 399          audio_channel_set_spacial( ch, thingy->pos, thingy->range );
 400
 401          if( !(ch->flags & AUDIO_FLAG_LOOP) )
 402             ch = audio_relinquish_channel( ch );
 403       }
 404    }
 405    audio_unlock();
 406 #endif
 407
 408    world_compute_light_indices( world );
 409
 410    vg_acquire_thread_sync();
 411    {
 412       /* create scene lighting buffer */
 413
 414       u32 size = VG_MAX(mdl_arrcount(&world->ent_light),1) * sizeof(float)*12;
 415       vg_info( "Upload %ubytes (lighting)\n", size );
 416
 417       glGenBuffers( 1, &world->tbo_light_entities );
 418       glBindBuffer( GL_TEXTURE_BUFFER, world->tbo_light_entities );
 419       glBufferData( GL_TEXTURE_BUFFER, size, NULL, GL_DYNAMIC_DRAW );
 420
 421       /* buffer layout
 422        *
 423        *  colour               position                direction (spots)
 424        * | .   .   .   .     | .   .   .   .         | .   .   .   .  |
 425        * | Re  Ge  Be  Night | Xco Yco Zco Range     | Dx  Dy  Dz  Da |
 426        *
 427        */
 428
 429       v4f *light_dst = glMapBuffer( GL_TEXTURE_BUFFER, GL_WRITE_ONLY );
 430       for( u32 i=0; i<mdl_arrcount(&world->ent_light); i++ ){
 431          ent_light *light = mdl_arritm( &world->ent_light, i );
 432
 433          /* colour  + night */
 434          v3_muls( light->colour, light->colour[3] * 2.0f, light_dst[i*3+0] );
 435          light_dst[i*3+0][3] = 2.0f;
 436
 437          if( !light->daytime ){
 438             u32 hash = (i * 29986577u) & 0xffu;
 439             float switch_on = hash;
 440                   switch_on *= (1.0f/255.0f);
 441
 442             light_dst[i*3+0][3] = 0.44f + switch_on * 0.015f;
 443          }
 444
 445          /* position + 1/range^2 */
 446          v3_copy( light->transform.co, light_dst[i*3+1] );
 447          light_dst[i*3+1][3] = 1.0f/(light->range*light->range);
 448
 449          /* direction + angle */
 450          q_mulv( light->transform.q, (v3f){0.0f,-1.0f,0.0f}, light_dst[i*3+2]);
 451          light_dst[i*3+2][3] = cosf( light->angle );
 452       }
 453
 454       glUnmapBuffer( GL_TEXTURE_BUFFER );
 455
 456       glGenTextures( 1, &world->tex_light_entities );
 457       glBindTexture( GL_TEXTURE_BUFFER, world->tex_light_entities );
 458       glTexBuffer( GL_TEXTURE_BUFFER, GL_RGBA32F, world->tbo_light_entities );
 459
 460       /* Upload lighting uniform buffer */
 461       if( world->water.enabled )
 462          v4_copy( world->water.plane, world->ub_lighting.g_water_plane );
 463
 464       v4f info_vec;
 465       v3f *bounds = world->scene_geo->bbx;
 466
 467       info_vec[0] = bounds[0][0];
 468       info_vec[1] = bounds[0][2];
 469       info_vec[2] = 1.0f/ (bounds[1][0]-bounds[0][0]);
 470       info_vec[3] = 1.0f/ (bounds[1][2]-bounds[0][2]);
 471       v4_copy( info_vec, world->ub_lighting.g_depth_bounds );
 472
 473       /*
 474        * Rendering the depth map
 475        */
 476       camera ortho;
 477
 478       v3f extent;
 479       v3_sub( world->scene_geo->bbx[1], world->scene_geo->bbx[0], extent );
 480
 481       float fl = world->scene_geo->bbx[0][0],
 482             fr = world->scene_geo->bbx[1][0],
 483             fb = world->scene_geo->bbx[0][2],
 484             ft = world->scene_geo->bbx[1][2],
 485             rl = 1.0f / (fr-fl),
 486             tb = 1.0f / (ft-fb);
 487
 488       m4x4_zero( ortho.mtx.p );
 489       ortho.mtx.p[0][0] = 2.0f * rl;
 490       ortho.mtx.p[2][1] = 2.0f * tb;
 491       ortho.mtx.p[3][0] = (fr + fl) * -rl;
 492       ortho.mtx.p[3][1] = (ft + fb) * -tb;
 493       ortho.mtx.p[3][3] = 1.0f;
 494       m4x3_identity( ortho.transform );
 495       camera_update_view( &ortho );
 496       camera_finalize( &ortho );
 497
 498       glDisable(GL_DEPTH_TEST);
 499       glDisable(GL_BLEND);
 500       glDisable(GL_CULL_FACE);
 501       render_fb_bind( &world->heightmap );
 502       shader_blitcolour_use();
 503       shader_blitcolour_uColour( (v4f){-9999.0f,-9999.0f,-9999.0f,-9999.0f} );
 504       render_fsquad();
 505
 506       glEnable(GL_BLEND);
 507       glBlendFunc(GL_ONE, GL_ONE);
 508       glBlendEquation(GL_MAX);
 509
 510       render_world_position( world, &ortho );
 511       glDisable(GL_BLEND);
 512       glEnable(GL_DEPTH_TEST);
 513       glBindFramebuffer( GL_FRAMEBUFFER, 0 );
 514
 515       /* upload full buffer */
 516       glBindBuffer( GL_UNIFORM_BUFFER, world->ubo_lighting );
 517       glBufferSubData( GL_UNIFORM_BUFFER, 0,
 518                        sizeof(struct ub_world_lighting), &world->ub_lighting );
 519    }
 520
 521    vg_release_thread_sync();
 522 }
 523
 524 VG_STATIC void world_process_resources( world_instance *world )
 525 {
 526    vg_info( "Loading textures\n" );
 527
 528    world->texture_count = 0;
 529
 530    world->texture_count = world->meta.textures.count+1;
 531    world->textures = vg_linear_alloc( world_global.generic_heap,
 532                               vg_align8(sizeof(GLuint)*world->texture_count) );
 533
 534    vg_acquire_thread_sync();
 535    {
 536       /* error texture */
 537       world->textures[0] = vg_tex2d_new();
 538       vg_tex2d_set_error();
 539       vg_tex2d_nearest();
 540       vg_tex2d_repeat();
 541
 542       for( u32 i=0; i<mdl_arrcount(&world->meta.textures); i++ ){
 543          mdl_texture *tex = mdl_arritm( &world->meta.textures, i );
 544
 545          if( !tex->file.pack_size ){
 546             vg_release_thread_sync();
 547             vg_fatal_exit_loop( "World models must have packed textures!" );
 548          }
 549
 550          vg_linear_clear( vg_mem.scratch );
 551          world->textures[i+1] = vg_tex2d_new();
 552          vg_tex2d_set_error();
 553          vg_tex2d_qoi( mdl_arritm( &world->meta.pack, tex->file.pack_offset ),
 554                        tex->file.pack_size,
 555                        mdl_pstr( &world->meta, tex->file.pstr_path ));
 556          vg_tex2d_nearest();
 557          vg_tex2d_repeat();
 558       }
 559    }
 560    vg_release_thread_sync();
 561
 562    vg_info( "Loading materials\n" );
 563
 564    world->surface_count = world->meta.materials.count+1;
 565    world->surfaces = vg_linear_alloc( world_global.generic_heap,
 566                vg_align8(sizeof(struct world_surface)*world->surface_count) );
 567
 568    /* error material */
 569    struct world_surface *errmat = &world->surfaces[0];
 570    memset( errmat, 0, sizeof(struct world_surface) );
 571
 572    for( u32 i=0; i<mdl_arrcount(&world->meta.materials); i++ ){
 573       world->surfaces[i+1].info =
 574          *(mdl_material *)mdl_arritm( &world->meta.materials, i );
 575    }
 576 }
 577
 578 VG_STATIC void world_unload( world_instance *world )
 579 {
 580    vg_acquire_thread_sync();
 581
 582    /* free meshes */
 583    mesh_free( &world->mesh_route_lines );
 584    mesh_free( &world->mesh_geo );
 585    mesh_free( &world->mesh_no_collide );
 586
 587    /* glDeleteBuffers silently ignores 0's and names that do not correspond to
 588     * existing buffer objects.
 589     * */
 590    glDeleteBuffers( 1, &world->tbo_light_entities );
 591    glDeleteTextures( 1, &world->tex_light_entities );
 592    glDeleteTextures( 1, &world->tex_light_cubes );
 593
 594    /* FIXME: CANT DO THIS HERE */
 595    /*        whynot? */
 596    /*        oh this should be moved to a global function */
 597    world_global.time = 0.0;
 598    world_global.rewind_from = 0.0;
 599    world_global.rewind_to = 0.0;
 600    world_global.last_use = 0.0;
 601    world_global.sfd.active_route_board = 0;
 602
 603    /* delete textures and meshes */
 604    glDeleteTextures( world->texture_count, world->textures );
 605
 606    /* delete the entire block of memory */
 607    /* FIXME: WE CANT DO THIS SHIT ANYMORE, NEED TO DEALLOC FROM ABOVE */
 608 #if 0
 609    vg_linear_clear( world->dynamic_vgl );
 610    vg_linear_clear( world->audio_vgl );
 611 #endif
 612
 613    vg_release_thread_sync();
 614 }
 615
 616 VG_STATIC void world_init_blank( world_instance *world )
 617 {
 618    memset( &world->meta, 0, sizeof(mdl_context) );
 619
 620    world->textures = NULL;
 621    world->texture_count = 0;
 622    world->surfaces = NULL;
 623    world->surface_count = 0;
 624
 625    world->scene_geo = NULL;
 626    world->scene_no_collide = NULL;
 627    world->scene_lines = NULL;
 628
 629    world->geo_bh = NULL;
 630    world->volume_bh = NULL;
 631    world->audio_bh = NULL;
 632    world->rendering_gate = NULL;
 633
 634    world->water.enabled = 0;
 635
 636    /* default lighting conditions
 637     * -------------------------------------------------------------*/
 638    struct ub_world_lighting *state = &world->ub_lighting;
 639
 640    state->g_light_preview = 0;
 641    state->g_shadow_samples = 8;
 642    state->g_water_fog = 0.04f;
 643
 644    v4_zero( state->g_water_plane );
 645    v4_zero( state->g_depth_bounds );
 646
 647    state->g_shadow_length = 9.50f;
 648    state->g_shadow_spread = 0.65f;
 649
 650    v3_copy( (v3f){0.37f, 0.54f, 0.97f}, state->g_daysky_colour );
 651    v3_copy( (v3f){0.03f, 0.05f, 0.20f}, state->g_nightsky_colour );
 652    v3_copy( (v3f){1.00f, 0.32f, 0.01f}, state->g_sunset_colour );
 653    v3_copy( (v3f){0.13f, 0.17f, 0.35f}, state->g_ambient_colour );
 654    v3_copy( (v3f){0.25f, 0.17f, 0.51f}, state->g_sunset_ambient );
 655    v3_copy( (v3f){1.10f, 0.89f, 0.35f}, state->g_sun_colour );
 656 }
 657
 658 VG_STATIC void world_entities_init( world_instance *world )
 659 {
 660    /* lights */
 661    for( u32 j=0; j<mdl_arrcount(&world->ent_light); j ++ ){
 662       ent_light *light = mdl_arritm( &world->ent_light, j );
 663
 664       m4x3f to_world;
 665       q_m3x3( light->transform.q, to_world );
 666       v3_copy( light->transform.co, to_world[3] );
 667       m4x3_invert_affine( to_world, light->inverse_world );
 668
 669       light->angle_sin_cos[0] = sinf( light->angle * 0.5f );
 670       light->angle_sin_cos[1] = cosf( light->angle * 0.5f );
 671    }
 672
 673    /* gates */
 674    for( u32 j=0; j<mdl_arrcount(&world->ent_gate); j ++ ){
 675       ent_gate *gate = mdl_arritm( &world->ent_gate, j );
 676       gate_transform_update( gate );
 677    }
 678
 679    /* water */
 680    for( u32 j=0; j<mdl_arrcount(&world->ent_water); j++ ){
 681       ent_water *water = mdl_arritm( &world->ent_water, j );
 682       if( world->water.enabled ){
 683          vg_warn( "Multiple water surfaces in level!\n" );
 684          break;
 685       }
 686
 687       world->water.enabled = 1;
 688       water_set_surface( world, water->transform.co[1] );
 689    }
 690
 691    /* volumes */
 692    for( u32 j=0; j<mdl_arrcount(&world->ent_volume); j++ ){
 693       ent_volume *volume = mdl_arritm( &world->ent_volume, j );
 694       mdl_transform_m4x3( &volume->transform, volume->to_world );
 695       m4x3_invert_full( volume->to_world, volume->to_local );
 696    }
 697
 698    /* audio packs */
 699    for( u32 j=0; j<mdl_arrcount(&world->ent_audio); j++ ){
 700       ent_audio *audio = mdl_arritm( &world->ent_audio, j );
 701
 702       for( u32 k=0; k<audio->clip_count; k++ ){
 703          ent_audio_clip *clip = mdl_arritm( &world->ent_audio_clip,
 704                                              audio->clip_start+k );
 705
 706          if( clip->file.pack_size ){
 707             u32 size = clip->file.pack_size,
 708                 offset = clip->file.pack_offset;
 709
 710             /* FIXME: Ditchable asset! */
 711             void *data = mdl_arritm(&world->meta.pack, clip->file.pack_offset);
 712
 713             clip->clip.path = NULL;
 714             clip->clip.flags = audio->flags;
 715             clip->clip.data = data;
 716             clip->clip.size = size;
 717          }
 718          else{
 719             clip->clip.path = mdl_pstr( &world->meta, clip->file.pstr_path );
 720             clip->clip.flags = audio->flags;
 721             clip->clip.data = NULL;
 722             clip->clip.size = 0;
 723          }
 724
 725          audio_clip_load( &clip->clip, world_global.generic_heap );
 726       }
 727    }
 728 }
 729
 730 VG_STATIC void world_load( world_instance *world, const char *path )
 731 {
 732    world_unload( world );
 733    world_init_blank( world );
 734
 735    vg_info( "Loading world: %s\n", path );
 736
 737    mdl_open( &world->meta, path, world_global.generic_heap );
 738    mdl_load_metadata_block( &world->meta, world_global.generic_heap );
 739    mdl_load_animation_block( &world->meta, world_global.generic_heap );
 740    mdl_load_mesh_block( &world->meta, world_global.generic_heap );
 741
 742    /* TODO: This should get a seperate memory area */
 743    mdl_load_pack_block( &world->meta, world_global.generic_heap );
 744
 745    mdl_load_array( &world->meta, &world->ent_gate,
 746                    "ent_gate", world_global.generic_heap );
 747    mdl_load_array( &world->meta, &world->ent_spawn,
 748                    "ent_spawn", world_global.generic_heap );
 749    mdl_load_array( &world->meta, &world->ent_light,
 750                    "ent_light", world_global.generic_heap );
 751
 752    mdl_load_array( &world->meta, &world->ent_route_node,
 753                    "ent_route_node", world_global.generic_heap );
 754    mdl_load_array( &world->meta, &world->ent_path_index,
 755                    "ent_path_index", world_global.generic_heap );
 756    mdl_load_array( &world->meta, &world->ent_checkpoint,
 757                    "ent_checkpoint", world_global.generic_heap );
 758    mdl_load_array( &world->meta, &world->ent_route,
 759                    "ent_route", world_global.generic_heap );
 760    mdl_load_array( &world->meta, &world->ent_water,
 761                    "ent_water", world_global.generic_heap );
 762    mdl_load_array( &world->meta, &world->ent_audio_clip,
 763                    "ent_audio_clip", world_global.generic_heap );
 764    mdl_load_array( &world->meta, &world->ent_audio,
 765                    "ent_audio", world_global.generic_heap );
 766    mdl_load_array( &world->meta, &world->ent_volume,
 767                    "ent_volume", world_global.generic_heap );
 768
 769    mdl_close( &world->meta );
 770
 771    /* process resources from pack */
 772    world_process_resources( world );
 773
 774 #if 0
 775    /* dynamic allocations */
 776    world_ents_allocate( world );
 777    world_routes_allocate( world );
 778
 779    /* meta processing */
 780 #endif
 781    world_routes_ent_init( world );
 782    world_entities_init( world );
 783    world->volume_bh = bh_create( world_global.generic_heap,
 784                                  &bh_system_volumes,
 785                                  world,
 786                                  mdl_arrcount( &world->ent_volume ),
 787                                  1 );
 788
 789    /* main bulk */
 790    world_generate( world );
 791    world_routes_generate( world );
 792    world_post_process( world );
 793 }
 794
 795 #endif /* WORLD_GEN_H */