Just wondering... is this even possible? I''m writing a pixel level sprite editor (don''t ask
) for my next game, and want the ability to rotate an image, so that I won''t have to do it by hand.
First a bit of background on the program. The graphics data is stored in three equally sized arrays -- red, green, and blue. I want to be able to rotate to say... 30 degrees or something, and then store the resulting "rotated array" in another array. I know that when I rotate something, it will no longer fit in the same size array (meaning, I''ll have to store it in a bigger array) but that''s not an issue.
Here''s what I''ve been thinking so far:
- I would take the current column position of the array, multiply by the cosine of the angle, and store that into the new array
- Then, I would take the current row position of the array, multiply by the sin of the angle, and then store that.
The only problem is, the cos/sin functions will return a float, which cannot be used a subscript. I haven''t tried this yet, but would it work if I simply typecasted to an int and lost the float precision? (This is assuming what I said up there makes any sense at all; it might be totally off
)
Anyone know how this would be done? I''ve thought and thought and thought about how I could do this, but I can''t seem to get it right. I''m not sure this can be done, but seeing as how it can be done with bitmaps and such, I''m guessing there is SOME way to do it. Suggestions appreciated
