- return tile;
-}
-
-static void map_stack_current_coords( int coords[2], int offset )
-{
- coords[0] = map.stack.frames[ map.stack.level+offset ].x;
- coords[1] = map.stack.frames[ map.stack.level+offset ].y;
-}
-
-static void map_update_visual(void)
-{
- u8 celldata[ 4096 ];
-
- static int compute_flow_counter = 0;
- compute_flow_counter ^= 0x1;
-
- for( int i = 0; i < map.y*map.x; i ++ )
- {
- struct cell *cell = map.cells + i;
-
- cell->flowing[compute_flow_counter] = cell->flowing[compute_flow_counter^0x1];
-
- if( !map.cells[i].source_count )
- cell->flowing[ compute_flow_counter ] = vg_max( cell->flowing[ compute_flow_counter ] - 10, 0 );
-
- map.cells[i].source_count = 0;
- }
-
- for( int y = 0; y < map.y; y ++ )
- {
- for( int x = 0; x < map.x; x ++ )
- {
- struct cell *cur = map.cells + y*map.x + x;
- u8 *cellbytes = celldata + (y*map.x+x)*4;
-
- if( cur->flags & CELL_FLAG_WALKABLE )
- {
- struct cell *a, *b, *c, *d;
-
- a = map_tile_at_cond( (int[2]){ x,y+1 }, CELL_FLAG_WALKABLE );
- b = map_tile_at_cond( (int[2]){ x+1,y }, CELL_FLAG_WALKABLE );
- c = map_tile_at_cond( (int[2]){ x,y-1 }, CELL_FLAG_WALKABLE );
- d = map_tile_at_cond( (int[2]){ x-1,y }, CELL_FLAG_WALKABLE );
-
- u32 config = (a?0x1:0x0) | (b?0x2:0x0) | (c?0x4:0x0) | (d?0x8:0x0);
- cellbytes[ 0 ] = config;
-
- if( cur->flags & CELL_FLAG_OUTPUT )
- cur->flowing[ compute_flow_counter ] = 128;
- }
- else
- {
- // TODO: Random background tiles
- cellbytes[ 0 ] = 1;
- }
- }
- }
-
- int const k_rate_flow = 16;
-
- map_stack_refresh();
- for( int i = 0; i < arrlen( map.io ); i ++ )
- {
- int inputcoord[2];
- if( map.cells[ map.io[i] ].flags & CELL_FLAG_OUTPUT )
- {
- map_tile_coords_from_index( map.io[i], inputcoord );
- map_stack_init( inputcoord );
- struct cell *cell = map_tile_at( inputcoord );
-
- int cr[2];
-
- do
- {
- map_stack_current_coords( cr, 0 );
-
- u8 *cellbytes = celldata + (cr[1]*map.x+cr[0])*4;
-
- int outflow = cell->flowing[ compute_flow_counter ^ 0x1 ];
- int sourcing = outflow? 1: 0;
- int outrate = outflow == 128? k_rate_flow: 0;
-
- struct cell *a, *b, *d;
- a = map_tile( (int[2]){ cr[0], cr[1]+1 } );
- b = map_tile( (int[2]){ cr[0]+1, cr[1] } );
- d = map_tile( (int[2]){ cr[0]-1, cr[1] } );
-
- int compute_l = 0, compute_r = 0;
-
- switch( cellbytes[0] )
- {
- // DOWN
- case 1: case 5: case 11: case 9: case 3:
- a->flowing[ compute_flow_counter ] += outrate;
- a->source_count += sourcing;
- break;
- case 2: case 6: compute_r = 1; break;
- case 8: case 12: compute_l = 1; break;
- case 10: case 14: compute_l = 1; compute_r = 1; break;
- default: break;
- }
-
- if( compute_r && (celldata[ (cr[1]*map.x+cr[0]+1)*4 ] != 14) )
- {
- b->flowing[ compute_flow_counter ] += outrate;
- b->source_count += sourcing;
- }
-
- if( compute_l && (celldata[ (cr[1]*map.x+cr[0]-1)*4 ] != 14) )
- {
- d->flowing[ compute_flow_counter ] += outrate;
- d->source_count += sourcing;
- }
-
- if( cellbytes[0] == 10 )
- {
- int crl[2];
- map_stack_current_coords( crl, -1 );
-
- if( crl[0] < cr[0] )
- {
- cellbytes[0] = 15;
- }
- }
- }
- while( (cell = map_stack_next()) );
- }
- }
-
- for( int i = 0; i < map.y*map.x; i ++ )
- {
- map.cells[i].flowing[ compute_flow_counter ] = vg_min( 128, map.cells[i].flowing[ compute_flow_counter ] );
- celldata[ i*4+2 ] = map.cells[i].flowing[ compute_flow_counter ];
- }
-
- glBindBuffer( GL_ARRAY_BUFFER, map.tiles_vbo );
- glBufferSubData( GL_ARRAY_BUFFER, 16*sizeof(float) + 1024*2*sizeof(float), map.x*map.y*4, celldata );