java - 从右到左绘制图像

Question

我必须在图表上绘制彩色 map 。问题是我的图可以在右边或左边有原点。 是否可以从右向左绘制？

double origin_x = xPositionToPixel(0.0);
    double origin_y = yPositionToPixel(0.0);
    BufferedImage image = new BufferedImage(values.length, values[0].length, BufferedImage.TYPE_INT_ARGB);
    Graphics2D gImg = (Graphics2D)image.getGraphics();
    for (int i = 0; i < values.length; i++) {
        Double[] dValues = values[i];
        for (int j = 0; j < dValues.length; j++) {
            double value = dValues[j];
            gImg.setColor(ColorMap.getPixelColor(value));
            gImg.drawRect(i, j, 1, 1);
        }
    }
    g2.drawImage(image, (int)origin_x + 1, (int)origin_y + 1, null);

Answer 1

是的，使用 AffineTransform并反转 x 轴:

AffineTransform at = new AffineTransform();
at.scale(-1, 1);
at.translate((int)origin_x + 1, (int)origin_y + 1);

g2d.drawImage(image, at, null);