翻转和旋转图像。仿射变换不';不能在java中正常工作
嘿,我实现了旋转和翻转图像的代码翻转和旋转图像。仿射变换不';不能在java中正常工作,java,swing,java-2d,flip,affinetransform,Java,Swing,Java 2d,Flip,Affinetransform,嘿,我实现了旋转和翻转图像的代码 左、右、上下旋转都有效 翻转水平,垂直的作品 但是他们不在一起工作 当我翻转图像然后旋转时,它消失了 但是 当我翻转并翻转图像时(就像翻转之前一样),我可以正常旋转 我试图理解什么是错误的,我认为问题在于变换或缩放 你知道如何修复这个代码吗 /** * Paint the icons of this compound icon at the specified location * * @param c * The comp
- 左、右、上下旋转都有效
- 翻转水平,垂直的作品
- 但是他们不在一起工作
我试图理解什么是错误的,我认为问题在于变换或缩放 你知道如何修复这个代码吗
/**
* Paint the icons of this compound icon at the specified location
*
* @param c
* The component on which the icon is painted
* @param g
* the graphics context
* @param x
* the X coordinate of the icon's top-left corner
* @param y
* the Y coordinate of the icon's top-left corner
*/
@Override
public void paintIcon(Component c, Graphics g, int x, int y) {
Graphics2D g2 = (Graphics2D) g.create();
AffineTransform af = g2.getTransform();
int cWidth = icon.getIconWidth() / 2;
int cHeight = icon.getIconHeight() / 2;
int xAdjustment = (icon.getIconWidth() % 2) == 0 ? 0 : -1;
int yAdjustment = (icon.getIconHeight() % 2) == 0 ? 0 : -1;
if (rotate == Rotate.DOWN) {
g2.translate(x + cHeight, y + cWidth);
g2.rotate(Math.toRadians(90));
icon.paintIcon(c, g2, -cWidth, yAdjustment - cHeight);
} else if (rotate == Rotate.UP) {
g2.translate(x + cHeight, y + cWidth);
g2.rotate(Math.toRadians(-90));
icon.paintIcon(c, g2, xAdjustment - cWidth, -cHeight);
} else if (rotate == Rotate.UPSIDE_DOWN) {
g2.translate(x + cWidth, y + cHeight);
g2.rotate(Math.toRadians(180));
icon.paintIcon(c, g2, xAdjustment - cWidth, yAdjustment - cHeight);
} else if (rotate == Rotate.VERTICAL) {
g2.translate(0, getIconHeight());
g2.scale(1, -1);
icon.paintIcon(c, g2, x, y);
vert = !vert; //boolean flag
} else if (rotate == Rotate.HORIZONTAL) {
g2.translate(getIconWidth(), 0);
g2.scale(-1, 1);
icon.paintIcon(c, g2, x, y);
hor = !hor; //boolean flag
} else if (rotate == Rotate.VERTICALLY_HORIZONTAL) {
g2.translate(getIconWidth(), getIconHeight());
g2.scale(-1, -1);
icon.paintIcon(c, g2, x, y);
hor = !hor;
vert = !vert;
} else if (rotate == Rotate.CENTER) {
g2.setRenderingHint(RenderingHints.KEY_ANTIALIASING,
RenderingHints.VALUE_ANTIALIAS_ON);
AffineTransform original = g2.getTransform();
AffineTransform at = new AffineTransform();
at.concatenate(original);
at.translate((getIconWidth() - icon.getIconWidth()) / 2,
(getIconHeight() - icon.getIconHeight()) / 2);
at.rotate(Math.toRadians(angle), x + cWidth, y + cHeight);
g2.setTransform(at);
icon.paintIcon(c, g2, x, y);
g2.setTransform(original);
}
}
如果你想让它们一起工作,你必须保存你用变换制作的图像。这里有一个例子
图像源=。。。;
图像转换拷贝=。。。;
仿射变换在=。。。;
transformedCopy.getGraphics().setTransform(at).drawImage(orig);
//transformedCopy现在将拥有已转换图像的副本
在图标之后。paintIcon
需要恢复g2
的原始状态,执行反向操作。可能,但当布尔标志vert设置为true时,我尝试执行此反向操作:if(vert){g2.translate(0,getIconHeight());g2.scale(1,-1);}有人知道如何从数学上求逆吗?g2.scale(1,-1);g2.translate(0,-getIconHeight())代码>当有垂直翻转时,我设置布尔标志“vert”,在if块中向左(向上)和向下(向右)旋转,我在正常平移和旋转之前进行反转,它不起作用是的,但是,我使用ImageIcon,所以我必须保存:-ImageIcon-Graphics2D-Graphics-Icon?ImageIcon.setImage(transformedCopy);