从图像中切割形状

Question

我有一个缓冲图像和一组形状，如拼图。我想从图像中剪下这些形状。我尝试剪切图像，但它不能正常工作。到目前为止我所做的是：

    for (int i = 0; i < rows; i++) {
        for (int j = 0; j < cols; j++) {
            Area area = areas[i][j];
            int width = (int) area.getBounds2D().getWidth();
            int height = (int) area.getBounds2D().getHeight();

            pieces[i][j] = new BufferedImage(width, height, image.getType());
            Graphics2D gr = pieces[i][j].createGraphics();
            gr.setClip(area);
            gr.drawImage(image, 0, 0, null);
            gr.dispose();

            try {
                ImageIO.write(pieces[i][j], "png", new File("img/img" + i + "" + j + ".png"));
            } catch (IOException e) {
                e.printStackTrace();
            }
        }
    }

它只适用于第一个形状，然后将透明图像写入输出。

Answer 1

实际上有很多方法可以做到这一点。这是我的方法:)

int width = 0;
int height = 0;
int rows = 0;
int columns = 0;
BufferedImage sheet = // you image goes here 
BufferedImage[] pieces = new BufferedImage[rows * cols];
for (int i = 0; i < rows; i++) {
    for (int j = 0; j < cols; j++) {
        pieces[(i * cols) + j] = sheet.getSubimage(j * width, i * height, width, height);    
    }
}

请注意，这些片段都在一个数组中。如果您仍然希望您的作品在二维数组中：

// Switch these lines
BufferedImage[][] pieces = new BufferedImage[rows][cols];
pieces[i][j] = sheet.getSubimage(j * width, i * height, width, height);   

补充阅读： Spritesheets 和动画
点击here！