java - 如何做对称 - Graphics java

Question

所以，我有这些代码行:

BufferedImage bufferedImage = new BufferedImage(100, 100, BufferedImage.TYPE_INT_ARGB);
    Graphics g = bufferedImage.getGraphics();
    g.setColor(Color.cyan);
    g.fillRect(0, 0, 10, 10);

(实际上，我在这张图像上绘制了不同的形状..)

但是如何使该图像(垂直)对称呢？有没有办法做到这一点？或者我必须编写整个代码...

提前谢谢

Answer 1

来自https://examples.javacodegeeks.com/desktop-java/awt/image/flipping-a-buffered-image/

// Flip the image vertically
AffineTransform tx = AffineTransform.getScaleInstance(1, -1);
tx.translate(0, -image.getHeight(null));
AffineTransformOp op = new AffineTransformOp(tx, AffineTransformOp.TYPE_NEAREST_NEIGHBOR);
image = op.filter(image, null);


// Flip the image horizontally
tx = AffineTransform.getScaleInstance(-1, 1);
tx.translate(-image.getWidth(null), 0);
op = new AffineTransformOp(tx, AffineTransformOp.TYPE_NEAREST_NEIGHBOR);
image = op.filter(image, null);

// Flip the image vertically and horizontally; equivalent to rotating the image 180 degrees
tx = AffineTransform.getScaleInstance(-1, -1);
tx.translate(-image.getWidth(null), -image.getHeight(null));
op = new AffineTransformOp(tx, AffineTransformOp.TYPE_NEAREST_NEIGHBOR);
image = op.filter(image, null);