Hi, all
I use a Sprite to render a image, and then I rotate the Sprite (by
changing X Rotation). Then I wanna the image rendered on the rotated
Sprite to interact with the mouse event. For example, if I click the
mouse at some point with in the image, then the portion aroud that
point of the image will be changed(by some filter for example) to
respond the click.
Now, the problem is how to translate the point at which the mouse
clicked, to the real point at the Sprite? I do know the QC use "a
three-dimensional homogeneous coordinate system" with X, Y, Z with in
the range [-1, 1], but I don't know how to translate. Because the
rotated Sprite will be perspectively transformed.
I hope I have stated the problem clearly.
Can anyone know what I am saying and help me out? Thanks!
--
Ben Chen, Apple Technology Lab of Software Engineering School, Tongji University
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