drawing images and rotating with JOGL

OpenGL Development JOGL Development
#1

All my images are PNG format. I’ve gotten to the point where I can draw these images using gl.glDrawPixels(). I generate all the byte[] buffers upon load of the game, however this itself isn’t adequate if I want images rotated during the game. What is the best way to implement this?

  1. Use Java2D to apply AffineTransform rotation to image and then produce byte[] for each frame. Seems like this add a lot of overhead, especially with 60+ fps.

  2. Use Textures? I’m wondering if I convert an image to texture if JOGL can do the rotation for me.

  3. Any other ideas?

#2

Yes you’ll need to use textures. This is pretty easy to do. The first step is to create a texture object to use the byte[] data from your loaded image. Then you draw a quad that contains the entire image and when you want the image rotated, you rotate the quad.

#3

excellent, thanks!