🚀 go-pugleaf

mucds@uxa.ecn.bgu.edu (Corey D. Stinson) writes:


>	Could someone help me with a problem.  I have a small sprite
>(bitmapped) and when animating, instead of re-drawing the picture over
>and over to repesent the rotation stages I would like to develop some
>algorithm to rotate the image.  And suggestions on one that would not
>degrade the image?  Thanx for any help you can offer :)
>					Corey

	Wouldn't the idea be the same as rotating a point on a screen
except instead of moving a point on the screen you are moving a point 
in an array?  Say you wanted an image rotated in 6 different directions.
You would start out with your source bitmap, then apply the rotation
function (which I don't remember right off hand, but it should be in
any trig book) to all points in the array at intervals of 60 degrees.
If you place the center of the bitmap at the origin I wouldn't think that
this scheme would distort the image.  Good luck
					Steven