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HTML5 canvas - drawing arcs and rotating graphics example code renderings_html5 tutorial skills

WBOY
WBOYOriginal
2016-05-16 15:49:351861browse

Before doing the rotation operation, you must understand one sentence: What is rotated is the coordinate system of the canvas rather than the graphic itself. Well, after understanding this sentence, the next step is very simple.
First get to know the coordinates of drawing a circle:


Copy the code
The code is as follows:



Rendering:
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