我正在制作一个 HTML5 画布游戏,我希望旋转其中一张图片.
I am making an HTML5 canvas game, and I wish to rotate one of the images.
var link = new Image();
link.src='img/link.png';
link.onload=function(){
ctx.drawImage(link,x,y,20,20); // draws a chain link or dagger
}
我想旋转这张图片.旋转图像的标准方法是在画布上下文对象上设置旋转.但是,这会旋转整个游戏!我不想这样做,只想旋转这个精灵.我该怎么做?
I wish to rotate this image. The standard way of rotating image was to set a rotation on the canvas context object. However, that rotates the entire game! I don't want to do that, and only wish to rotate this one sprite. How do I do that?
使用 .save()
和 .restore()
(更多信息):
link.onload=function(){
ctx.save(); // save current state
ctx.rotate(Math.PI); // rotate
ctx.drawImage(link,x,y,20,20); // draws a chain link or dagger
ctx.restore(); // restore original states (no rotation etc)
}
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