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Are you looking to do general purpose rotation or limited? &nbsp;By limited, I mean orthogonal only perhaps. &nbsp;If so, there are many shortcuts that speed things up by avoiding solving trigonometric (i.e. VERY slow) equations for each point. &nbsp;If general purpose, you just perform a angular transformation on each point using the origin of the rotation as the base point. &nbsp;Surely you covered this in grade-school mathematics....<br />
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BTW, this wouldn't be homework, would it???<br />

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Are you looking to do general purpose rotation or limited?  By limited, I mean orthogonal only perhaps.  If so, there are many shortcuts that speed things up by avoiding solving trigonometric (i.e. VERY slow) equations for each point.  If general purpose, you just perform a angular transformation on each point using the origin of the rotation as the base point.  Surely you covered this in grade-school mathematics....

BTW, this wouldn't be homework, would it???


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<a href="http://www.codeguru.com/bitmap/rotate_bitmap.shtml" rel="ugc">http://www.codeguru.com/bitmap/rotate_bitmap.shtml</a><br />

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http://www.codeguru.com/bitmap/rotate_bitmap.shtml [http://www.codeguru.com/bitmap/rotate_bitmap.shtml]


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How would one rotate an image in Visual C++, specify the point around which it is rotated, and as a bonus find out where in the newly rotated image a pixel from the origional image was? (Ex. find out where in the new image the bottom-leftmost pixel from the origional image is.)
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How would one rotate an image in Visual C++, specify the point around which it is rotated, and as a bonus find out where in the newly rotated image a pixel from the origional image was? (Ex. find out where in the new image the bottom-leftmost pixel from the origional image is.)

How to rotate an image in C++

C++ is an intermediate-level general-purpose programming language, not to be confused with C or C#. It was developed as a set of extensions to the C programming language to improve type-safety and add support for automatic resource management, object-orientation, generic programming, and exception handling, among other features.