Re: Rotating a pixbuf (free, any number of degrees)

[Carlos Eduardo Medaglia Dyonisio <carlos dyonisio digitro com br>]

On Tue, 24 May 2005 13:07:37 +0200
Benjamin Podszun <ben galactic-tales de> wrote:
> I'm currently trying to write a small game using GTK (to be honest: 
> gtk-sharp) and need to rotate an image for my (small, easy, currently 
> dumb) 2D Game-View.
> I found no reference to any GTK-way of doing things like that, but all 
> "no, you can't do this without writing the code yourself or using 3rd 
> party libraries" that I found were about 3-4 years old, so I would like 
> to give it a try again: Is there any native way of archiving what I want?

Hi!

You can use math to do this.
Just multiply every dot of the image by rotation matrix in R2.

Take a look at http://mathworld.wolfram.com/RotationMatrix.html

I don't know if it is the best way, but it works. :)

Regards,
Cadu