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Old September 27th, 2010, 09:27 PM   #1 (permalink)
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Question how to control the bitmap rotate base on the touch position?

how to control the bitmap rotate base on the touch position?

my program like rotate text on touch

the bitmap needle at the center, the user touch different position, the bitmap will rotate and point to the touch position. the bitmap not move, only rotate.

how can i make it??
how can i calculate the coordinate degree?

i need this technology for my homework,thank you.

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Last edited by grostcar; September 28th, 2010 at 03:51 AM.
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