cur.origin.x报错
为什么我这里写
cur = new Square()；
cur.origin.x = 10;
会报：Uncaught TypeError: Cannot set property 'x' of undefined
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为什么我这里写
cur = new Square()；
cur.origin.x = 10;
会报：Uncaught TypeError: Cannot set property 'x' of undefined
2019-08-14
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