October 26th, 2010, 11:32 PM
Rotating Object About Center Using GDI++
I am trying to rotate a bitmap about it's center point.
The bitmap I am using in my test project is 200 X 200 pixels.
By trial and error, I came up with the following. It works, but I don't understand why.
Does anyone understand why this works for the 200 X 200 bmp?
(I increment AngleX by 10 in WM_LBUTTONDOWN, and in 36 clicks the image comes full circle.)
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