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拿起方形码见证奇迹！
Coded by: Rocky Li
- Getting Started:
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Augmented reality requires a printed 卡通大头贴 Marker to work. If you don't already have one, 
print one here. 
Turn on your computer's webcam, and turnoff any pop-up blockers. 
Hold your printed marker so it faces your computer's webcam.
Open the door of the LightTrace environment by twisting and turning your marker! - Tips and Tricks:
- Make sure you are in a well lit area.
- Make sure that your computer's camera is turned on. Augmented reality does not work without a webcam .
- Be sure to hold your tracking target so it faces the camera directly. If it's pointing the wrong way, you may miss the magic.
- Mac users — you may need to activate your webcam via your Flash Player Settings? Just right-click the pop-up window on the middle of the screen, select the webcam icon, and choose USB video from the drop down.