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Ping Pong

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Shanfan
Huang
Click on the Canvas to drop the "Ping Pong". The longer you hold your mouse key, the bigger the Ping Pong is. This is my Lesson 4 Project, after learning the concept of object, class and array. I struggled for long hours to get the "display()" function right, but no luck. I wanted the Ping Pong to keep the size after being generated by the mousePress(), and not to be affected by the next mousePress(). But instead the "display()" showing a flicker every time when the mouse is pressed. I found myself lacking of the programing process. I can't get the logic right before I sketch. All my lin
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