void drawToBuff() {
Graphics2D g = (Graphics2D) buff.createGraphics();
// g.setRenderingHint(RenderingHints.KEY_ANTIALIASING,RenderingHints.VALUE_ANTIALIAS_ON);
g.setStroke(new BasicStroke(5));
g.setColor(Color.CYAN);
g.fillRect(0, 0, Global.WinX, Global.WinY);
for (int i = 0; i < terrains.size(); ++i) {
terrains.get(i).draw(g);
}
wrinkle.draw(g);
}
