+ glViewport( 0,0, vg_window_x, vg_window_y );
+
+ glDisable( GL_DEPTH_TEST );
+ glClearColor( 0.8f, 0.8f, 0.8f, 1.0f );
+ glClear( GL_COLOR_BUFFER_BIT | GL_DEPTH_BUFFER_BIT );
+
+ use_mesh( &world.tile );
+ SHADER_USE( shader_tile_colour );
+ glUniformMatrix3fv( SHADER_UNIFORM( shader_tile_colour, "uPv" ), 1, GL_FALSE, (float *)vg_pv );
+
+ // Shadow layer
+ glUniform4f( SHADER_UNIFORM( shader_tile_colour, "uColour" ), 0.5f, 0.5f, 0.5f, 1.0f );
+ for( int y = 0; y < world.h; y ++ )
+ for( int x = 0; x < world.w; x ++ )
+ {
+ struct cell *cell = pcell((v2i){x,y});
+
+ if( cell->state & FLAG_CANAL )
+ {
+ continue;
+ }
+
+ glUniform3f( SHADER_UNIFORM( shader_tile_colour, "uOffset" ), (float)x - 0.2f, (float)y - 0.15f, 1.0f );
+ draw_mesh( 0, 2 );
+ }
+
+ for( int y = 0; y < world.h; y ++ )
+ {
+ for( int x = 0; x < world.w; x ++ )
+ {
+ struct cell *cell = pcell((v2i){x,y});
+ int selected = world.selected == y*world.w + x;
+
+ if( cell->state & FLAG_SPLIT )
+ {
+ glUniform4f( SHADER_UNIFORM( shader_tile_colour, "uColour" ), 0.9f, 0.9f, 0.9f, 1.0f );
+ glUniform3f( SHADER_UNIFORM( shader_tile_colour, "uOffset" ), (float)x, (float)y, 1.0f );
+
+ struct mesh *splitter = cell->state & FLAG_FLIP_FLOP? &world.splitter_r: &world.splitter_l;
+
+ use_mesh( splitter );
+ draw_mesh( 0, splitter->elements );
+ use_mesh( &world.tile );
+ }
+
+ if( (cell->state & FLAG_CANAL) && !selected )
+ continue;
+
+ glUniform3f( SHADER_UNIFORM( shader_tile_colour, "uOffset" ), (float)x, (float)y, 1.0f );
+
+ v4f colour;
+
+ if( cell->state & FLAG_WALL ) { v4_copy( (v4f){ 0.2f, 0.2f, 0.2f, 1.0f }, colour ); }
+ else if( cell->state & FLAG_CANAL ) { v4_copy( (v4f){ 0.6f, 0.6f, 0.6f, 1.0f }, colour ); }
+ else if( cell->state & FLAG_INPUT ) { v4_copy( (v4f){ 0.5f, 0.5f, 0.5f, 1.0f }, colour ); }
+ else if( cell->state & FLAG_OUTPUT ) { v4_copy( (v4f){ 0.2f, 0.7f, 0.3f, 1.0f }, colour ); }
+ else v4_copy( (v4f){ 0.9f, 0.9f, 0.9f, 1.0f }, colour );
+
+ //if( cell->water[world.frame&0x1] )
+ // v4_copy( (v4f){ 0.2f, 0.3f, 0.7f * (float)(cell->water[world.frame&0x1]) * (1.0f/16.0f), 1.0f }, colour );
+
+ if( selected )
+ v3_muls( colour, sinf( vg_time )*0.25f + 0.5f, colour );
+
+ //if( cell->state & (FLAG_SPLIT) )
+ // v4_copy( (v4f){ 0.75f, 0.75f, 0.02f, 1.0f }, colour );
+ //if( cell->state & (FLAG_MERGER) )
+ // v4_copy( (v4f){ 0.75f, 0.02f, 0.75f, 1.0f }, colour );
+
+ glUniform4fv( SHADER_UNIFORM( shader_tile_colour, "uColour" ), 1, colour );
+
+ draw_mesh( 0, 2 );
+ }
+ }
+
+ use_mesh( &world.circle );