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( u32 index, const char *path );
  11
  12 VG_STATIC void world_add_all_if_material( m4x3f transform, scene_context *scene,
  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( scene, mdl, sm, transform2 );
  26          }
  27       }
  28    }
  29 }
  30
  31 VG_STATIC void world_add_blob( world_instance *world,
  32                                scene_context *scene, 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( scene->vertex_count + vg_list_size(verts) > scene->max_vertices )
  60       vg_fatal_error( "Scene vertex buffer overflow" );
  61
  62    if( scene->indice_count + vg_list_size(indices) > scene->max_indices )
  63       vg_fatal_error( "Scene index buffer overflow" );
  64
  65    scene_vert *dst_verts = &scene->arrvertices[ scene->vertex_count ];
  66    u32 *dst_indices      = &scene->arrindices [ scene->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] + scene->vertex_count;
  83
  84    scene->vertex_count += vg_list_size(verts);
  85    scene->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                                                scene_context *scene,
  91                                                struct world_surface *mat )
  92 {
  93    if( vg.quality_profile == k_quality_profile_low )
  94       return;
  95
  96    vg_info( "Applying foliage (%u)\n", mat->info.pstr_name );
  97
  98    v3f volume;
  99    v3_sub( world->scene_geo.bbx[1], world->scene_geo.bbx[0], volume );
 100    volume[1] = 1.0f;
 101
 102    int count = 0;
 103
 104    float area = volume[0]*volume[2];
 105    u32 particles = 0.08f * area;
 106
 107    vg_info( "Map area: %f. Max particles: %u\n", area, particles );
 108
 109    for( u32 i=0; i<particles; i++ ){
 110       v3f pos;
 111       v3_mul( volume, (v3f){ vg_randf(), 1000.0f, vg_randf() }, pos );
 112       pos[1] = 1000.0f;
 113       v3_add( pos, world->scene_geo.bbx[0], pos );
 114
 115       ray_hit hit;
 116       hit.dist = INFINITY;
 117
 118       if( ray_world( world, pos, (v3f){0.0f,-1.0f,0.0f}, &hit )){
 119          struct world_surface *m1 = ray_hit_surface( world, &hit );
 120          if((hit.normal[1] > 0.8f) && (m1 == mat) && (hit.pos[1] > 0.0f+10.0f)){
 121             world_add_blob( world, scene, &hit );
 122             count ++;
 123          }
 124       }
 125    }
 126
 127    vg_info( "%d foliage models added\n", count );
 128 }
 129
 130 VG_STATIC void world_generate( world_instance *world )
 131 {
 132    /*
 133     * Compile meshes into the world scenes
 134     */
 135    scene_init( &world->scene_geo, 320000, 1200000 );
 136    u32 buf_size = scene_mem_required( &world->scene_geo );
 137    u8 *buffer = vg_linear_alloc( world->heap, buf_size );
 138    scene_supply_buffer( &world->scene_geo, buffer );
 139
 140    m4x3f midentity;
 141    m4x3_identity( midentity );
 142
 143    /*
 144     * Generate scene: collidable geometry
 145     * ----------------------------------------------------------------
 146     */
 147
 148    vg_info( "Generating collidable geometry\n" );
 149
 150    for( u32 i=0; i<world->surface_count; i++ ){
 151       struct world_surface *surf = &world->surfaces[ i ];
 152
 153       if( surf->info.flags & k_material_flag_collision )
 154          world_add_all_if_material( midentity, &world->scene_geo,
 155                                     &world->meta, i );
 156
 157       scene_copy_slice( &world->scene_geo, &surf->sm_geo );
 158    }
 159
 160    /* compress that bad boy */
 161    u32 new_vert_max = world->scene_geo.vertex_count,
 162        new_vert_size = vg_align8(new_vert_max*sizeof(scene_vert)),
 163        new_indice_len = world->scene_geo.indice_count*sizeof(u32);
 164
 165    u32 *src_indices = world->scene_geo.arrindices,
 166        *dst_indices = (u32 *)(buffer + new_vert_size);
 167
 168    memmove( dst_indices, src_indices, new_indice_len );
 169
 170    world->scene_geo.max_indices = world->scene_geo.indice_count;
 171    world->scene_geo.max_vertices = world->scene_geo.vertex_count;
 172    buf_size = scene_mem_required( &world->scene_geo );
 173
 174    buffer = vg_linear_resize( world->heap, buffer, buf_size );
 175
 176    world->scene_geo.arrvertices = (scene_vert *)(buffer);
 177    world->scene_geo.arrindices = (u32 *)(buffer + new_vert_size);
 178
 179    scene_upload_async( &world->scene_geo, &world->mesh_geo );
 180
 181    /* need send off the memory to the gpu before we can create the bvh. */
 182    vg_async_stall();
 183    vg_info( "creating bvh\n" );
 184
 185    /* setup spacial mapping and rigidbody */
 186    world->geo_bh = scene_bh_create( world->heap, &world->scene_geo );
 187
 188    v3_zero( world->rb_geo.rb.co );
 189    v3_zero( world->rb_geo.rb.v );
 190    q_identity( world->rb_geo.rb.q );
 191    v3_zero( world->rb_geo.rb.w );
 192
 193    world->rb_geo.type = k_rb_shape_scene;
 194    world->rb_geo.inf.scene.bh_scene = world->geo_bh;
 195    rb_init_object( &world->rb_geo );
 196
 197    /*
 198     * Generate scene: non-collidable geometry
 199     * ----------------------------------------------------------------
 200     */
 201    vg_info( "Generating non-collidable geometry\n" );
 202
 203    vg_async_item *call = scene_alloc_async( &world->scene_no_collide,
 204                                             &world->mesh_no_collide,
 205                                             200000, 500000 );
 206
 207    for( u32 i=0; i<world->surface_count; i++ ){
 208       struct world_surface *surf = &world->surfaces[ i ];
 209
 210       if( !(surf->info.flags & k_material_flag_collision) ){
 211          world_add_all_if_material( midentity,
 212                                     &world->scene_no_collide, &world->meta, i );
 213       }
 214
 215       if( surf->info.flags & k_material_flag_grow_grass )
 216          world_apply_procedural_foliage( world,
 217                                          &world->scene_no_collide, surf );
 218
 219       scene_copy_slice( &world->scene_no_collide, &surf->sm_no_collide );
 220    }
 221
 222    for( u32 i=0; i<mdl_arrcount( &world->ent_traffic ); i++ ){
 223       ent_traffic *vehc = mdl_arritm( &world->ent_traffic, i );
 224
 225       for( u32 j=0; j<vehc->submesh_count; j++ ){
 226          mdl_submesh *sm = mdl_arritm( &world->meta.submeshs,
 227                                        vehc->submesh_start+j );
 228
 229          if( sm->flags & k_submesh_flag_consumed ){
 230             continue;
 231          }
 232
 233          m4x3f identity;
 234          m4x3_identity( identity );
 235          scene_add_mdl_submesh( &world->scene_no_collide,
 236                                 &world->meta, sm, identity );
 237
 238          scene_copy_slice( &world->scene_no_collide, sm );
 239          sm->flags |= k_submesh_flag_consumed;
 240       }
 241    }
 242
 243    vg_async_dispatch( call, async_scene_upload );
 244 }
 245
 246 float fsd_cone_infinite( v3f p, v2f c )
 247 {
 248    v2f q = { v2_length( (v2f){ p[0], p[2] } ), -p[1] };
 249    float s = vg_maxf( 0.0f, v2_dot( q, c ) );
 250
 251    v2f v0;
 252    v2_muls( c, s, v0 );
 253    v2_sub( q, v0, v0 );
 254
 255    float d = v2_length( v0 );
 256    return d * ((q[0]*c[1]-q[1]*c[0]<0.0f)?-1.0f:1.0f);
 257 }
 258
 259 struct light_indices_upload_info{
 260    world_instance *world;
 261    v3i count;
 262
 263    void *data;
 264 };
 265
 266 VG_STATIC void async_upload_light_indices( void *payload, u32 size )
 267 {
 268    struct light_indices_upload_info *info = payload;
 269
 270    glGenTextures( 1, &info->world->tex_light_cubes );
 271    glBindTexture( GL_TEXTURE_3D, info->world->tex_light_cubes );
 272    glTexImage3D( GL_TEXTURE_3D, 0, GL_RG32UI,
 273                  info->count[0], info->count[1], info->count[2],
 274                  0, GL_RG_INTEGER, GL_UNSIGNED_INT, info->data );
 275    glTexParameteri( GL_TEXTURE_3D, GL_TEXTURE_MIN_FILTER, GL_NEAREST );
 276    glTexParameteri( GL_TEXTURE_3D, GL_TEXTURE_MAG_FILTER, GL_NEAREST );
 277 }
 278
 279 VG_STATIC void world_compute_light_indices( world_instance *world )
 280 {
 281    /* light cubes */
 282    v3f cubes_min, cubes_max;
 283    v3_muls( world->scene_geo.bbx[0], 1.0f/k_light_cube_size, cubes_min );
 284    v3_muls( world->scene_geo.bbx[1], 1.0f/k_light_cube_size, cubes_max );
 285
 286    v3_sub( cubes_min, (v3f){ 0.5f, 0.5f, 0.5f }, cubes_min );
 287    v3_add( cubes_max, (v3f){ 0.5f, 0.5f, 0.5f }, cubes_max );
 288
 289    v3_floor( cubes_min, cubes_min );
 290    v3_floor( cubes_max, cubes_max );
 291
 292    v3i icubes_min, icubes_max;
 293
 294    for( int i=0; i<3; i++ ){
 295       icubes_min[i] = cubes_min[i];
 296       icubes_max[i] = cubes_max[i];
 297    }
 298
 299    v3f cube_size;
 300
 301    v3i icubes_count;
 302    v3i_sub( icubes_max, icubes_min, icubes_count );
 303
 304    for( int i=0; i<3; i++ ){
 305       int clamped_count = VG_MIN( 128, icubes_count[i]+1 );
 306       float clamped_max = icubes_min[i] + clamped_count,
 307                     max = icubes_min[i] + icubes_count[i]+1;
 308
 309       icubes_count[i] = clamped_count;
 310       cube_size[i] = (max / clamped_max) * k_light_cube_size;
 311       cubes_max[i] = clamped_max;
 312    }
 313
 314    v3_mul( cubes_min, cube_size, cubes_min );
 315    v3_mul( cubes_max, cube_size, cubes_max );
 316
 317    for( int i=0; i<3; i++ ){
 318       float range = cubes_max[i]-cubes_min[i];
 319       world->ub_lighting.g_cube_inv_range[i] = 1.0f / range;
 320       world->ub_lighting.g_cube_inv_range[i] *= (float)icubes_count[i];
 321
 322       vg_info( "cubes[%d]: %d\n", i, icubes_count[i] );
 323    }
 324
 325    int total_cubes = icubes_count[0]*icubes_count[1]*icubes_count[2];
 326
 327    u32 data_size = vg_align8(total_cubes*sizeof(u32)*2),
 328        hdr_size  = vg_align8(sizeof(struct light_indices_upload_info));
 329
 330    vg_async_item *call = vg_async_alloc( data_size + hdr_size );
 331    struct light_indices_upload_info *info = call->payload;
 332    info->data = ((u8*)call->payload) + hdr_size;
 333    info->world = world;
 334    u32 *cubes_index = info->data;
 335
 336    for( int i=0; i<3; i++ )
 337       info->count[i] = icubes_count[i];
 338
 339    vg_info( "Computing light cubes (%d) [%f %f %f] -> [%f %f %f]\n",
 340              total_cubes, cubes_min[0], -cubes_min[2], cubes_min[1],
 341                           cubes_max[0], -cubes_max[2], cubes_max[1] );
 342    v3_copy( cubes_min, world->ub_lighting.g_cube_min );
 343
 344    float bound_radius = v3_length( cube_size );
 345
 346    for( int iz = 0; iz<icubes_count[2]; iz ++ ){
 347       for( int iy = 0; iy<icubes_count[1]; iy++ ){
 348          for( int ix = 0; ix<icubes_count[0]; ix++ ){
 349             boxf bbx;
 350             v3_div( (v3f){ ix, iy, iz }, world->ub_lighting.g_cube_inv_range,
 351                   bbx[0] );
 352             v3_div( (v3f){ ix+1, iy+1, iz+1 },
 353                   world->ub_lighting.g_cube_inv_range,
 354                   bbx[1] );
 355
 356             v3_add( bbx[0], world->ub_lighting.g_cube_min, bbx[0] );
 357             v3_add( bbx[1], world->ub_lighting.g_cube_min, bbx[1] );
 358
 359             v3f center;
 360             v3_add( bbx[0], bbx[1], center );
 361             v3_muls( center, 0.5f, center );
 362
 363             u32 indices[6] = { 0, 0, 0, 0, 0, 0 };
 364             u32 count = 0;
 365
 366             float influences[6] = { 0.0f, 0.0f, 0.0f, 0.0f, 0.0f, 0.0f };
 367             const int N = vg_list_size( influences );
 368
 369             for( u32 j=0; j<mdl_arrcount(&world->ent_light); j ++ ){
 370                ent_light *light = mdl_arritm( &world->ent_light, j );
 371                v3f closest;
 372                closest_point_aabb( light->transform.co, bbx, closest );
 373
 374                float dist = v3_dist( closest, light->transform.co ),
 375                      influence = 1.0f/(dist+1.0f);
 376
 377                if( dist > light->range )
 378                   continue;
 379
 380                if( light->type == k_light_type_spot){
 381                   v3f local;
 382                   m4x3_mulv( light->inverse_world, center, local );
 383
 384                   float r = fsd_cone_infinite( local, light->angle_sin_cos );
 385
 386                   if( r > bound_radius )
 387                      continue;
 388                }
 389
 390                int best_pos = N;
 391                for( int k=best_pos-1; k>=0; k -- )
 392                   if( influence > influences[k] )
 393                      best_pos = k;
 394
 395                if( best_pos < N ){
 396                   for( int k=N-1; k>best_pos; k -- ){
 397                      influences[k] = influences[k-1];
 398                      indices[k] = indices[k-1];
 399                   }
 400
 401                   influences[best_pos] = influence;
 402                   indices[best_pos] = j;
 403                }
 404             }
 405
 406             for( int j=0; j<N; j++ )
 407                if( influences[j] > 0.0f )
 408                   count ++;
 409
 410             int base_index = iz * (icubes_count[0]*icubes_count[1]) +
 411                              iy * (icubes_count[0]) +
 412                              ix;
 413
 414             int lower_count = VG_MIN( 3, count );
 415             u32 packed_index_lower = lower_count;
 416             packed_index_lower |= indices[0]<<2;
 417             packed_index_lower |= indices[1]<<12;
 418             packed_index_lower |= indices[2]<<22;
 419
 420             int upper_count = VG_MAX( 0, count - lower_count );
 421             u32 packed_index_upper = upper_count;
 422             packed_index_upper |= indices[3]<<2;
 423             packed_index_upper |= indices[4]<<12;
 424             packed_index_upper |= indices[5]<<22;
 425
 426             cubes_index[ base_index*2 + 0 ] = packed_index_lower;
 427             cubes_index[ base_index*2 + 1 ] = packed_index_upper;
 428          }
 429       }
 430    }
 431
 432    vg_async_dispatch( call, async_upload_light_indices );
 433 }
 434
 435 VG_STATIC void async_world_postprocess_render( void *payload, u32 _size )
 436 {
 437    /* create scene lighting buffer */
 438    world_instance *world = payload;
 439
 440    u32 size = VG_MAX(mdl_arrcount(&world->ent_light),1) * sizeof(float)*12;
 441    vg_info( "Upload %ubytes (lighting)\n", size );
 442
 443    glGenBuffers( 1, &world->tbo_light_entities );
 444    glBindBuffer( GL_TEXTURE_BUFFER, world->tbo_light_entities );
 445    glBufferData( GL_TEXTURE_BUFFER, size, NULL, GL_DYNAMIC_DRAW );
 446
 447    /* buffer layout
 448     *
 449     *  colour               position                direction (spots)
 450     * | .   .   .   .     | .   .   .   .         | .   .   .   .  |
 451     * | Re  Ge  Be  Night | Xco Yco Zco Range     | Dx  Dy  Dz  Da |
 452     *
 453     */
 454
 455    v4f *light_dst = glMapBuffer( GL_TEXTURE_BUFFER, GL_WRITE_ONLY );
 456    for( u32 i=0; i<mdl_arrcount(&world->ent_light); i++ ){
 457       ent_light *light = mdl_arritm( &world->ent_light, i );
 458
 459       /* colour  + night */
 460       v3_muls( light->colour, light->colour[3] * 2.0f, light_dst[i*3+0] );
 461       light_dst[i*3+0][3] = 2.0f;
 462
 463       if( !light->daytime ){
 464          u32 hash = (i * 29986577u) & 0xffu;
 465          float switch_on = hash;
 466                switch_on *= (1.0f/255.0f);
 467
 468          light_dst[i*3+0][3] = 0.44f + switch_on * 0.015f;
 469       }
 470
 471       /* position + 1/range^2 */
 472       v3_copy( light->transform.co, light_dst[i*3+1] );
 473       light_dst[i*3+1][3] = 1.0f/(light->range*light->range);
 474
 475       /* direction + angle */
 476       q_mulv( light->transform.q, (v3f){0.0f,-1.0f,0.0f}, light_dst[i*3+2]);
 477       light_dst[i*3+2][3] = cosf( light->angle );
 478    }
 479
 480    glUnmapBuffer( GL_TEXTURE_BUFFER );
 481
 482    glGenTextures( 1, &world->tex_light_entities );
 483    glBindTexture( GL_TEXTURE_BUFFER, world->tex_light_entities );
 484    glTexBuffer( GL_TEXTURE_BUFFER, GL_RGBA32F, world->tbo_light_entities );
 485
 486    /* Upload lighting uniform buffer */
 487    if( world->water.enabled )
 488       v4_copy( world->water.plane, world->ub_lighting.g_water_plane );
 489
 490    v4f info_vec;
 491    v3f *bounds = world->scene_geo.bbx;
 492
 493    info_vec[0] = bounds[0][0];
 494    info_vec[1] = bounds[0][2];
 495    info_vec[2] = 1.0f/ (bounds[1][0]-bounds[0][0]);
 496    info_vec[3] = 1.0f/ (bounds[1][2]-bounds[0][2]);
 497    v4_copy( info_vec, world->ub_lighting.g_depth_bounds );
 498
 499    /*
 500     * Rendering the depth map
 501     */
 502    camera ortho;
 503
 504    v3f extent;
 505    v3_sub( world->scene_geo.bbx[1], world->scene_geo.bbx[0], extent );
 506
 507    float fl = world->scene_geo.bbx[0][0],
 508          fr = world->scene_geo.bbx[1][0],
 509          fb = world->scene_geo.bbx[0][2],
 510          ft = world->scene_geo.bbx[1][2],
 511          rl = 1.0f / (fr-fl),
 512          tb = 1.0f / (ft-fb);
 513
 514    m4x4_zero( ortho.mtx.p );
 515    ortho.mtx.p[0][0] = 2.0f * rl;
 516    ortho.mtx.p[2][1] = 2.0f * tb;
 517    ortho.mtx.p[3][0] = (fr + fl) * -rl;
 518    ortho.mtx.p[3][1] = (ft + fb) * -tb;
 519    ortho.mtx.p[3][3] = 1.0f;
 520    m4x3_identity( ortho.transform );
 521    camera_update_view( &ortho );
 522    camera_finalize( &ortho );
 523
 524    glDisable(GL_DEPTH_TEST);
 525    glDisable(GL_BLEND);
 526    glDisable(GL_CULL_FACE);
 527    render_fb_bind( &world->heightmap, 0 );
 528    shader_blitcolour_use();
 529    shader_blitcolour_uColour( (v4f){-9999.0f,-9999.0f,-9999.0f,-9999.0f} );
 530    render_fsquad();
 531
 532    glEnable(GL_BLEND);
 533    glBlendFunc(GL_ONE, GL_ONE);
 534    glBlendEquation(GL_MAX);
 535
 536    render_world_position( world, &ortho );
 537    glDisable(GL_BLEND);
 538    glEnable(GL_DEPTH_TEST);
 539    glBindFramebuffer( GL_FRAMEBUFFER, 0 );
 540
 541    /* upload full buffer */
 542    glBindBuffer( GL_UNIFORM_BUFFER, world->ubo_lighting );
 543    glBufferSubData( GL_UNIFORM_BUFFER, 0,
 544                     sizeof(struct ub_world_lighting), &world->ub_lighting );
 545 }
 546
 547 VG_STATIC int reset_player( int argc, char const *argv[] );
 548 VG_STATIC void world_post_process( world_instance *world )
 549 {
 550    world_compute_light_indices( world );
 551    vg_async_call( async_world_postprocess_render, world, 0 );
 552 }
 553
 554 VG_STATIC void world_process_resources( world_instance *world )
 555 {
 556    vg_info( "Loading textures\n" );
 557
 558    world->texture_count = 0;
 559
 560    world->texture_count = world->meta.textures.count+1;
 561    world->textures = vg_linear_alloc( world->heap,
 562                               vg_align8(sizeof(GLuint)*world->texture_count) );
 563
 564    vg_tex2d_replace_with_error( &world->textures[0] );
 565
 566    for( u32 i=0; i<mdl_arrcount(&world->meta.textures); i++ ){
 567       mdl_texture *tex = mdl_arritm( &world->meta.textures, i );
 568
 569       if( !tex->file.pack_size ){
 570          vg_fatal_error( "World models must have packed textures!" );
 571       }
 572
 573       vg_linear_clear( vg_mem.scratch );
 574       void *src_data = vg_linear_alloc( vg_mem.scratch,
 575                                         tex->file.pack_size );
 576       mdl_fread_pack_file( &world->meta, &tex->file, src_data );
 577
 578       vg_tex2d_load_qoi_async( src_data, tex->file.pack_size,
 579                                VG_TEX2D_NEAREST|VG_TEX2D_REPEAT,
 580                                &world->textures[i+1] );
 581    }
 582
 583    vg_info( "Loading materials\n" );
 584
 585    world->surface_count = world->meta.materials.count+1;
 586    world->surfaces = vg_linear_alloc( world->heap,
 587                vg_align8(sizeof(struct world_surface)*world->surface_count) );
 588
 589    /* error material */
 590    struct world_surface *errmat = &world->surfaces[0];
 591    memset( errmat, 0, sizeof(struct world_surface) );
 592
 593    for( u32 i=0; i<mdl_arrcount(&world->meta.materials); i++ ){
 594       world->surfaces[i+1].info =
 595          *(mdl_material *)mdl_arritm( &world->meta.materials, i );
 596    }
 597 }
 598
 599 #if 0
 600 VG_STATIC void world_free( world_instance *world )
 601 {
 602    vg_acquire_thread_sync();
 603
 604    /* free meshes */
 605    mesh_free( &world->mesh_route_lines );
 606    mesh_free( &world->mesh_geo );
 607    mesh_free( &world->mesh_no_collide );
 608
 609    /* glDeleteBuffers silently ignores 0's and names that do not correspond to
 610     * existing buffer objects.
 611     * */
 612    glDeleteBuffers( 1, &world->tbo_light_entities );
 613    glDeleteTextures( 1, &world->tex_light_entities );
 614    glDeleteTextures( 1, &world->tex_light_cubes );
 615
 616    /* delete textures and meshes */
 617    glDeleteTextures( world->texture_count, world->textures );
 618
 619    vg_release_thread_sync();
 620
 621    world->status = k_world_status_unloaded;
 622 }
 623 #endif
 624
 625 VG_STATIC void world_init_blank( world_instance *world )
 626 {
 627    memset( &world->meta, 0, sizeof(mdl_context) );
 628
 629    world->textures = NULL;
 630    world->texture_count = 0;
 631    world->surfaces = NULL;
 632    world->surface_count = 0;
 633
 634    world->geo_bh = NULL;
 635    world->volume_bh = NULL;
 636    world->audio_bh = NULL;
 637    world->rendering_gate = NULL;
 638
 639    world->water.enabled = 0;
 640
 641    /* default lighting conditions
 642     * -------------------------------------------------------------*/
 643    struct ub_world_lighting *state = &world->ub_lighting;
 644
 645    state->g_light_preview = 0;
 646    state->g_shadow_samples = 8;
 647    state->g_water_fog = 0.04f;
 648
 649    v4_zero( state->g_water_plane );
 650    v4_zero( state->g_depth_bounds );
 651
 652    state->g_shadow_length = 9.50f;
 653    state->g_shadow_spread = 0.65f;
 654
 655    v3_copy( (v3f){0.37f, 0.54f, 0.97f}, state->g_daysky_colour );
 656    v3_copy( (v3f){0.03f, 0.05f, 0.20f}, state->g_nightsky_colour );
 657    v3_copy( (v3f){1.00f, 0.32f, 0.01f}, state->g_sunset_colour );
 658    v3_copy( (v3f){0.13f, 0.17f, 0.35f}, state->g_ambient_colour );
 659    v3_copy( (v3f){0.25f, 0.17f, 0.51f}, state->g_sunset_ambient );
 660    v3_copy( (v3f){1.10f, 0.89f, 0.35f}, state->g_sun_colour );
 661 }
 662
 663 VG_STATIC void world_entities_init( u32 world_id )
 664 {
 665    world_instance *world = &world_global.worlds[world_id];
 666
 667    /* lights */
 668    for( u32 j=0; j<mdl_arrcount(&world->ent_light); j ++ ){
 669       ent_light *light = mdl_arritm( &world->ent_light, j );
 670
 671       m4x3f to_world;
 672       q_m3x3( light->transform.q, to_world );
 673       v3_copy( light->transform.co, to_world[3] );
 674       m4x3_invert_affine( to_world, light->inverse_world );
 675
 676       light->angle_sin_cos[0] = sinf( light->angle * 0.5f );
 677       light->angle_sin_cos[1] = cosf( light->angle * 0.5f );
 678    }
 679
 680    /* gates */
 681    for( u32 j=0; j<mdl_arrcount(&world->ent_gate); j ++ ){
 682       ent_gate *gate = mdl_arritm( &world->ent_gate, j );
 683
 684       if( gate->type == k_gate_type_teleport ){
 685          gate_transform_update( gate );
 686       }
 687       else if( gate->type == k_gate_type_nonlocal_unlinked ){
 688          const char *key = mdl_pstr( &world->meta, gate->target );
 689          vg_info( "key: %s\n", key );
 690
 691          for( u32 i=0; i<vg_list_size(world_global.worlds); i++ ){
 692             world_instance *other = &world_global.worlds[i];
 693             if( other == world ) continue;
 694             if( other->status != k_world_status_loaded ) continue;
 695             vg_info( "Checking world %u for key matches\n", i );
 696
 697             for( u32 j=0; j<mdl_arrcount( &other->ent_gate ); j++ ){
 698                ent_gate *gate2 = mdl_arritm( &other->ent_gate, j );
 699                if( gate2->type != k_gate_type_nonlocal_unlinked ) continue;
 700
 701                const char *key2 = mdl_pstr( &other->meta, gate2->target );
 702                vg_info( " key2: %s\n", key2 );
 703
 704                if( strcmp( key, key2 ) ) continue;
 705
 706                vg_success( "Non-local matching pair '%s' found. (%u:%u)\n",
 707                             key, world_id, i );
 708
 709                gate->type = k_gate_type_nonlocel;
 710                gate2->type = k_gate_type_nonlocel;
 711                gate->target = i;
 712                gate2->target = world_id;
 713
 714                v3_copy( gate->co[0], gate2->co[1] );
 715                v3_copy( gate2->co[0], gate->co[1] );
 716                v4_copy( gate->q[0], gate2->q[1] );
 717                v4_copy( gate2->q[0], gate->q[1] );
 718
 719                v4f qflip;
 720                q_axis_angle( qflip, (v3f){0.0f,1.0f,0.0f}, VG_PIf );
 721                q_mul( gate->q[0], qflip, gate->q[0] );
 722                q_mul( gate->q[1], qflip, gate->q[1] );
 723
 724                gate_transform_update( gate );
 725                gate_transform_update( gate2 );
 726
 727                goto matched;
 728             }
 729          }
 730 matched:;
 731       }
 732    }
 733
 734    /* water */
 735    for( u32 j=0; j<mdl_arrcount(&world->ent_water); j++ ){
 736       ent_water *water = mdl_arritm( &world->ent_water, j );
 737       if( world->water.enabled ){
 738          vg_warn( "Multiple water surfaces in level!\n" );
 739          break;
 740       }
 741
 742       world->water.enabled = 1;
 743       water_set_surface( world, water->transform.co[1] );
 744    }
 745
 746    /* volumes */
 747    for( u32 j=0; j<mdl_arrcount(&world->ent_volume); j++ ){
 748       ent_volume *volume = mdl_arritm( &world->ent_volume, j );
 749       mdl_transform_m4x3( &volume->transform, volume->to_world );
 750       m4x3_invert_full( volume->to_world, volume->to_local );
 751    }
 752
 753    /* audio packs */
 754    for( u32 j=0; j<mdl_arrcount(&world->ent_audio); j++ ){
 755       ent_audio *audio = mdl_arritm( &world->ent_audio, j );
 756
 757       for( u32 k=0; k<audio->clip_count; k++ ){
 758          ent_audio_clip *clip = mdl_arritm( &world->ent_audio_clip,
 759                                              audio->clip_start+k );
 760
 761          if( clip->file.pack_size ){
 762             u32 size = clip->file.pack_size,
 763                 offset = clip->file.pack_offset;
 764
 765             /* embedded files are fine to clear the scratch buffer, only
 766              * external audio uses it */
 767
 768             vg_linear_clear( vg_mem.scratch );
 769             void *data = vg_linear_alloc( vg_mem.scratch,
 770                                           clip->file.pack_size );
 771
 772             mdl_fread_pack_file( &world->meta, &clip->file, data );
 773
 774             clip->clip.path = NULL;
 775             clip->clip.flags = audio->flags;
 776             clip->clip.data = data;
 777             clip->clip.size = size;
 778          }
 779          else{
 780             clip->clip.path = mdl_pstr( &world->meta, clip->file.pstr_path );
 781             clip->clip.flags = audio->flags;
 782             clip->clip.data = NULL;
 783             clip->clip.size = 0;
 784          }
 785
 786          audio_clip_load( &clip->clip, world->heap );
 787       }
 788    }
 789 }
 790
 791 VG_STATIC void world_load( u32 index, const char *path )
 792 {
 793    world_instance *world = &world_global.worlds[index];
 794    world_init_blank( world );
 795    world->status = k_world_status_loading;
 796
 797    vg_info( "Loading world: %s\n", path );
 798
 799    void *allocator = NULL;
 800    if( index == 0 ) allocator = world_global.heap;
 801    else allocator = world_global.worlds[index-1].heap;
 802
 803    u32 heap_availible = vg_linear_remaining( allocator );
 804    u32 min_overhead = sizeof(vg_linear_allocator);
 805
 806    if( heap_availible < (min_overhead+1024) ){
 807       vg_fatal_error( "out of memory" );
 808    }
 809
 810    u32 size = heap_availible - min_overhead;
 811    void *heap = vg_create_linear_allocator( allocator, size,
 812                                             VG_MEMORY_SYSTEM );
 813
 814    world->heap = heap;
 815    mdl_context *meta = &world->meta;
 816
 817    mdl_open( meta, path, world->heap );
 818    mdl_load_metadata_block( meta, world->heap );
 819    mdl_load_animation_block( meta, world->heap );
 820    mdl_load_mesh_block( meta, world->heap );
 821
 822    mdl_load_array( meta, &world->ent_gate,      "ent_gate",       heap );
 823    mdl_load_array( meta, &world->ent_camera,    "ent_camera",     heap );
 824    mdl_load_array( meta, &world->ent_spawn,     "ent_spawn",      heap );
 825    mdl_load_array( meta, &world->ent_light,     "ent_light",      heap );
 826    mdl_load_array( meta, &world->ent_route_node,"ent_route_node", heap );
 827    mdl_load_array( meta, &world->ent_path_index,"ent_path_index", heap );
 828    mdl_load_array( meta, &world->ent_checkpoint,"ent_checkpoint", heap );
 829    mdl_load_array( meta, &world->ent_route,     "ent_route",      heap );
 830    mdl_load_array( meta, &world->ent_water,     "ent_water",      heap );
 831    mdl_load_array( meta, &world->ent_audio_clip,"ent_audio_clip", heap );
 832    mdl_load_array( meta, &world->ent_audio,     "ent_audio",      heap );
 833    mdl_load_array( meta, &world->ent_volume,    "ent_volume",     heap );
 834    mdl_load_array( meta, &world->ent_traffic,   "ent_traffic",    heap );
 835    mdl_load_array( meta, &world->ent_marker,    "ent_marker",     heap );
 836    mdl_load_array( meta, &world->ent_skateshop, "ent_skateshop",  heap );
 837    mdl_load_array( meta, &world->ent_swspreview,"ent_swspreview", heap );
 838
 839    /* process resources from pack */
 840    world_process_resources( world );
 841
 842    world_routes_ent_init( world );
 843    world_entities_init( index );
 844    world->volume_bh = bh_create( heap, &bh_system_volumes, world,
 845                                  mdl_arrcount( &world->ent_volume ), 1 );
 846
 847    /* main bulk */
 848    world_generate( world );
 849    world_routes_generate( world );
 850    world_post_process( world );
 851
 852    mdl_close( meta );
 853
 854    world->status = k_world_status_loaded;
 855 }
 856
 857 #endif /* WORLD_GEN_H */