用于实现H5中不规则图形按钮可点击区域的判断。

ShapeTouch 该Javascript库用于实现H5中不规则图形按钮可点击区域的判断，特别用于H5游戏中的某些场景
This Library used for testing the alpha value of a pixel on the irregular image, for example, the irregular button touch on the H5Game.
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king.shape.touch(src,x,y,callback) king.shape.touchPoint(src,point,callback)

point对象示例：
The point object like this:

{x:9,y:25} Return 返回值

Object {touch: true, alpha: 255} Or Object {touch: false, alpha: 0}

touch为true时，该点非透明，点击生效，alpha值大于0，touch为false时，该点透明，alpha为0.
（开发者也可以根据alpha的值自行判断点击是否生效）
The touch is true, the point is not transparent, the alpha value is greater than 0.

Html：添加引用后直接使用

<script type="text/javascript" src="ShapeTouch-min.js"></script> <script type="text/javascript"> (function() { king.shape.touch('images/logo.png',20,40,function(result){ console.log(result); }); }); </script>

Cocos creator：将文件放入assets即可，不需require

this.node.on('touchend', function (event) { var touchPoint = event.getLocation(); var node = event.currentTarget; var nodePoint = node.convertToNodeSpace(touchPoint); var nodeSrc = node.getComponent(cc.Sprite).spriteFrame.getTexture().url; king.shape.touchPoint(nodeSrc,nodePoint,function(result){ console.log(result); }); }, this);