code: private void applyBuffer() {
  		if (listMode > 0) {
  			return;
  		}
  		
  		if (vertIndex != 0) {
  			flushBuffer();
  			startBuffer();
  		}
  		
  		super.glColor4f(color[0], color[1], color[2], color[3]);
  	}
docs: Apply the current buffer and restart it