blocks|key|633161|text|你可以在你的Graphics上使用一个变换，这应该可以很好地旋转图像。下面是一个示例代码，您可以使用它来实现这一点：|type|unstyled|depth|inlineStyleRanges|offset|length|style|CODE|entityRanges|data|633162|AffineTransform+affineTransform+=+new+AffineTransform();+
//rotate+the+image+by+45+degrees+
affineTransform.rotate(Math.toRadians(45),+x,+y);+
g2d.drawImage(image,+m_affineTransform,+null);+|code-block|syntax|javascript|633163|entityMap^0|6|8|0|0^^$0|@$1|2|3|4|5|6|7|M|8|@$9|N|A|O|B|C]]|D|@]|E|$]]|$1|F|3|G|5|H|7|P|8|@]|D|@]|E|$I|J]]|$1|K|3|-4|5|6|7|Q|8|@]|D|@]|E|$]]]|L|$]]

You can use a transform on your <code>Graphics</code>, that should rotate the image just fine. Below is a sample code that you can use to acheive this:

<pre><code>AffineTransform affineTransform = new AffineTransform(); 
//rotate the image by 45 degrees 
affineTransform.rotate(Math.toRadians(45), x, y); 
g2d.drawImage(image, m_affineTransform, null); 
</code></pre>

blocks|key|633175|text|来自http://examples.javacodegeeks.com/desktop-java/awt/image/flipping-a-buffered-image|type|unstyled|depth|inlineStyleRanges|entityRanges|offset|length|data|633176|//+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);|code-block|syntax|javascript|633177|entityMap|0|LINK|mutability|MUTABLE|url|http://examples.javacodegeeks.com/desktop-java/awt/image/flipping-a-buffered-image^0|2|2A|0|0|0^^$0|@$1|2|3|4|5|6|7|Q|8|@]|9|@$A|R|B|S|1|T]]|C|$]]|$1|D|3|E|5|F|7|U|8|@]|9|@]|C|$G|H]]|$1|I|3|-4|5|6|7|V|8|@]|9|@]|C|$]]]|J|$K|$5|L|M|N|C|$O|P]]]]

From <a href="http://examples.javacodegeeks.com/desktop-java/awt/image/flipping-a-buffered-image">http://examples.javacodegeeks.com/desktop-java/awt/image/flipping-a-buffered-image</a>:

<pre><code>// 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);
</code></pre>

blocks|key|633188|text|你需要知道图像的宽度和高度，以确保它被正确缩放：|type|unstyled|depth|inlineStyleRanges|entityRanges|data|633189|int+width+=+image.getWidth();+int+height+=+image.getHeight();|code-block|syntax|javascript|633190|然后，您需要绘制它：|633191|//Flip+the+image+both+horizontally+and+vertically
g2d.drawImage(image,+x%2B(width/2),+y%2B(height/2),+-width,+-height,+null);
//Flip+the+image+horizontally
g2d.drawImage(image,+x%2B(width/2),+y-(height/2),+-width,+height,+null);
//Flip+the+image+vertically
g2d.drawImage(image,+x-(width/2),+y%2B(height/2),+width,+-height,+null);|633192|不管怎么说，我就是这么做的。|633193|entityMap^0|0|0|0|0|0^^$0|@$1|2|3|4|5|6|7|O|8|@]|9|@]|A|$]]|$1|B|3|C|5|D|7|P|8|@]|9|@]|A|$E|F]]|$1|G|3|H|5|6|7|Q|8|@]|9|@]|A|$]]|$1|I|3|J|5|D|7|R|8|@]|9|@]|A|$E|F]]|$1|K|3|L|5|6|7|S|8|@]|9|@]|A|$]]|$1|M|3|-4|5|6|7|T|8|@]|9|@]|A|$]]]|N|$]]

You need to know the width and height of the image to make sure it's properly scaled:

<pre><code>int width = image.getWidth(); int height = image.getHeight();
</code></pre>

Then, you need to draw it:

<pre><code>//Flip the image both horizontally and vertically
g2d.drawImage(image, x+(width/2), y+(height/2), -width, -height, null);
//Flip the image horizontally
g2d.drawImage(image, x+(width/2), y-(height/2), -width, height, null);
//Flip the image vertically
g2d.drawImage(image, x-(width/2), y+(height/2), width, -height, null);
</code></pre>

This is how I do it, anyways.

I've been trying to figure out how to flip an image for a while, but haven't figured out yet.

I'm using <code>Graphics2D</code> to draw an <code>Image</code> with 

<pre><code>g2d.drawImage(image, x, y, null)
</code></pre>

I just need a way to flip the image on the horizontal or vertical axis.

If you want you can have a look at the <a href="https://github.com/r3Fuze/2DProject/tree/master/src/com/fuze/project/" rel="noreferrer" title="link">full source on github</a>.

Flip Image with Graphics2D

我已经试着找出如何翻转图像一段时间了，但还没有弄清楚。我正在使用Graphics2D来绘制一个Imageg2d.drawImage(image, x, y, null)我只需要一种方法来翻转水平或垂直轴上的图像。如果你愿意，你可以看看。

问使用Graphics2D翻转图像
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