oCanvas changes the way you work with the canvas element. With the native canvas API you are drawing pixels onto the canvas. But when building something, you tend to think more in terms of objects than actual pixels. This is what oCanvas is made to do — create a bridge between the native API and the way you want to work. If you would want to access the native API, that is also possible. http://ocanvas.org/docs 例子代码：
oCanvas Demo
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