Implemented removal of cars if the node they're on gets removed

src/draw.odin

@@ -45,7 +45,10 @@ draw_nodes :: proc(self: ^Simulator) {
 @(private="file")
 draw_cars :: proc(self: ^Simulator) {
 	for &car in self.cars {
-		pos := self.nodes[car.origin].pos
+		ref := car.pos.ref
+		// TODO fix in the future
+		// let's fix it by tracking length of the road and 
+		pos := car.pos.type == .Node ? self.nodes[ref].pos : self.nodes[self.roads[ref].nodes[0]].pos
 		
 		rect := rl.Rectangle {
 			x = pos.x,