-VG_STATIC f64 world_routes_scatter_surface_points( world_instance *world,
- pointcloud_buffer *pcbuf,
- f32 rate )
-{
- static f32 densities[] = {
- [k_surface_prop_concrete] = 2.0f,
- [k_surface_prop_grass] = 0.8f,
- [k_surface_prop_metal] = 1.0f,
- [k_surface_prop_wood] = 2.5f,
- [k_surface_prop_tiles] = 4.0f
- };
-
- /* calculate total area */
- f64 total_area = 0.0f;
- for( u32 i=0; i<world->scene_geo.indice_count/3; i++ ){
- u32 *tri = &world->scene_geo.arrindices[i*3];
- struct world_surface *surf = world_tri_index_surface( world, tri[0] );
-
- if( surf->info.shader == k_shader_boundary ||
- surf->info.shader == k_shader_invisible ) continue;
-
- if( !(surf->info.flags & k_material_flag_preview_visibile) ) continue;
-
- scene_vert *va = &world->scene_geo.arrvertices[tri[0]],
- *vb = &world->scene_geo.arrvertices[tri[1]],
- *vc = &world->scene_geo.arrvertices[tri[2]];
-
- v3f v0, v1, vn;
- v3_sub( vb->co, va->co, v0 );
- v3_sub( vc->co, va->co, v1 );
- v3_cross( v0, v1, vn );
- if( vn[1] < 0.0f ) continue;
-
- f32 density = 1.0f;
- if( surf->info.surface_prop < vg_list_size(densities) )
- density = densities[surf->info.surface_prop];
- total_area += v3_length(vn)*0.5f*density;
- }
-
- f32 accum = 0.0f;
-
- u8 colour[] = { 80,80,80,255 };
- v3f light_dir = {0.3f,0.8f,0.1f};
- v3_normalize( light_dir );
-
- v3f inv_ext;
- v3_sub( pcbuf->boundary[1], pcbuf->boundary[0], inv_ext );
- v3_div( (v3f){1.0f,1.0f,1.0f}, inv_ext, inv_ext );
-
- for( u32 i=0; i<world->scene_geo.indice_count/3; i++ ){
- u32 *tri = &world->scene_geo.arrindices[i*3];
- struct world_surface *surf = world_tri_index_surface( world, tri[0] );
-
- if( surf->info.shader == k_shader_boundary ||
- surf->info.shader == k_shader_invisible ) continue;
-
- if( !(surf->info.flags & k_material_flag_preview_visibile) ) continue;
-
- scene_vert *va = &world->scene_geo.arrvertices[tri[0]],
- *vb = &world->scene_geo.arrvertices[tri[1]],
- *vc = &world->scene_geo.arrvertices[tri[2]];
-
- v3f v0, v1, vn;
- v3_sub( vb->co, va->co, v0 );
- v3_sub( vc->co, va->co, v1 );
- v3_cross( v0, v1, vn );
- if( vn[1] < 0.0f ) continue;
-
- f32 density = 1.0f;
- if( surf->info.surface_prop < vg_list_size(densities) )
- density = densities[surf->info.surface_prop];
-
- f32 area = v3_length(vn)*0.5f*density;
- accum += area;
-
- v3_normalize( vn );
-
- while( accum > rate ){
- accum -= rate;
-
- if( pcbuf->count >= pcbuf->max ) return total_area;
-
- v2f co = { vg_randf64(), vg_randf64() };
- if( v2_length2(co) > 0.5f ){
- co[0] = 1.0f-co[0];
- co[1] = 1.0f-co[1];
- }
-
- v3f pt;
- v3_muls( v0, co[0], pt );
- v3_muladds( pt, v1, co[1], pt );
- v3_add( va->co, pt, pt );
-
- if( pt[1] < world->water.height ) continue;
- pointcloud_vert *vert = &pcbuf->buf[ pcbuf->count ++ ];
-
- v3f pos;
- v3_sub( pt, pcbuf->boundary[0], pos );
- v3_mul( pos, inv_ext, pos );
-
- for( u32 i=0; i<3; i++ ){
- vert->pos[i] = (pos[i]-0.5f) * 32767.0f;
- }
-
- static v4f colours[] = {
- [k_surface_prop_concrete] = { 0.13, 0.15, 0.17, 1.0 },
- [k_surface_prop_grass] = { 0.07, 0.1, 0.14, 1.0 },
- [k_surface_prop_metal] = { 0.15, 0.19, 0.22, 1.0 },
- [k_surface_prop_wood] = { 0.1, 0.13, 0.17, 1.0 },
- [k_surface_prop_tiles] = { 0.05, 0.06, 0.07, 1.0 },
- };
-
- v4f col = {0.0f,0.0f,0.0f,0.0f};
- if( surf->info.surface_prop < vg_list_size(colours) ){
- v4_copy( colours[surf->info.surface_prop], col );
- }
-
- f32 brightness = v3_dot(vn,light_dir)*0.5f+0.5f;
- v3_muls( col, brightness, col );
-
- for( u32 j=0; j<4; j++ ){
- vert->colour[j] = col[j] * 255.0f;
- }
- }
- }
-
- return total_area;
-}
-
-VG_STATIC void world_routes_surface_grid( world_instance *world,
- pointcloud_buffer *pcbuf )
-{
- i32 const k_gridlines = 32,
- k_gridres = 255;
-
- v3f inv_ext;
- v3_sub( pcbuf->boundary[1], pcbuf->boundary[0], inv_ext );
- v3_div( (v3f){1.0f,1.0f,1.0f}, inv_ext, inv_ext );
- v4f colour = {0.2f,0.2f,0.2f,1.0f};
- v3f dir = {0.0f,-1.0f,0.0f};
-
- for( u32 k=0; k<2; k++ ){
- u32 a = k*2,
- b = (k^0x1)*2;
-
- for( i32 x=0; x<=k_gridlines; x++ ){
- f32 t = (float)x / (float)k_gridlines,
- px = vg_lerpf( pcbuf->boundary[0][a], pcbuf->boundary[1][a], t );
-
- for( i32 z=0; z<=k_gridres; z++ ){
- f32 tz = (float)z / (float)k_gridres,
- pz = vg_lerpf(pcbuf->boundary[0][b],pcbuf->boundary[1][b], tz);
-
- v3f ro, hit;
- ro[a] = px;
- ro[1] = 1000.0f;
- ro[b] = pz;
-
- bh_iter it;
- bh_iter_init_ray( 0, &it, ro, dir, INFINITY );
- i32 idx;
-
- while( bh_next( world->geo_bh, &it, &idx ) ){
- u32 *tri = &world->scene_geo.arrindices[ idx*3 ];
- v3f vs[3];
-
- for( u32 i=0; i<3; i++ ){
- v3_copy( world->scene_geo.arrvertices[tri[i]].co, vs[i] );
- }
-
- f32 t;
- if( ray_tri( vs, ro, dir, &t ) ){
- v3_muladds( ro, dir, t, hit );
- struct world_surface *m1 =
- world_tri_index_surface( world, tri[0] );
-
- if( !(m1->info.flags & k_material_flag_preview_visibile) )
- continue;
-
- if( world->water.enabled )
- if( hit[1] < world->water.height )
- continue;
-
- if( pcbuf->count >= pcbuf->max ) return;
-
- pointcloud_vert *vert = &pcbuf->buf[ pcbuf->count ++ ];
-
- v3f co;
- v3_sub( hit, pcbuf->boundary[0], co );
- v3_mul( co, inv_ext, co );
-
- for( u32 i=0; i<3; i++ ){
- vert->pos[i] = (co[i]-0.5f) * 32767.0f;
- }
-
- for( u32 i=0; i<4; i++ ){
- vert->colour[i] = colour[i] * 255.0f;
- }
- }
- }
- }
- }
- }
-}
-