public void getOpaquePixels(){
		int width = sprite.getWidth()-1;
		int height = sprite.getHeight()-1;
		for(int x = 1; x < width; x++){
			for(int y = 1; y < height; y++){
				if(hasTransparentNeighbor(x, y)) {
					this.edgePixels.add(new Point(x, y));
				}
			}
		}
	}