> A good textbook on 3d computer graphics will explain how to rotate > a bitmap much more thoroughly than a PalmOS forum. Applying > a rotation transformation matrix to every point in a rectangular > bitmap is not even close to the most efficient algorithm. > > Computer Graphics: Principles and Practice > by Foley and van Dam, is one highly regarded textbook on the subject. > > You can also examine the code inside various software texture-mapped > 3d renderers. You might also want to use interpolation if you don't > want small bitmapped fonts to look even more ragged after rotation.
game developer websites are also good. also old demo sites. (most examples are in assembler, but, same concepts) :P my example using a transformation matrix was intentional. at least that way they can understand *how* it works. of course, there are a different algorithms to do the same thing - the shear/transform approach is well recommended. anti-aliasing is another topic of discussion all together *g* there is nothing worse than someone just c+p'ing an algorithm from somewhere without actually understanding how it works. it kinda makes it harder to debug :) --- Aaron Ardiri [EMAIL PROTECTED] http://www.mobilewizardry.com/members/aaron_ardiri.php [profile] -- For information on using the Palm Developer Forums, or to unsubscribe, please see http://www.palmos.com/dev/support/forums/
