There are a couple of issues I see with snap2tex:

1. It apparently only does power of two textures as currently written.

You can try using power of two window dimensions for cleaner edges right now, but it's to be expected that non-power of two sizes will have somewhat undefined behaviors. I have already changed things to support sub texturing, which has reduced edge artifacts.

2. The object really needs rectangle texture support. I'll have a

look into doing this soon.

3. There might be a small bug with the way ATI GPUs handle texture

borders. This can sometimes be seen along the edges of a cube for example. It used to plague rectangle textures quite a bit, but it comes and goes with 'updates' (you know how those go with Apple).

There are a couple of opportunities for additional features like texcoord manipulation and using repeating textures, etc, that might be worth a look. Also, one of the goals is to move to multiple render targets, which will make this snap2tex slightly obsolete. I have no idea when that will be done...

cgc

On 9/23/05, vade doktorp@mac.com wrote:

Hello

Ive been having an odd issue that I cant seem to figure out. Im using pix_snap2 to capture the complete rendered frame of my openGL scene. My objects are drawn in the center, and never go out of the openGL clipping volume, or the 2D clipping plane of the window.

However, pix_snap2tex seems to be picking up a one or two pixel border around the captured frame.

Im running OS X 10.4.2, powerbook, 128Mb VRam, GEM 0.90, Hans's PD 0.38-4-RC1

Here is a screenshot to illustrate

http://homepage.mac.com/doktorp/ars/gem1.png

Now, I was able to minimize these lines to only the bottom left by changing the capture resolution to snap2pix to 798x598 (chopping off two pixels from my gemwin resolution), but I cannot completely get rid of those lines..

anyone know? Idly curious..

btw, I tried mailing this to the list with an attachment, and it never went through... whats up with that ?

v a d e //

http://homepage.mac.com/doktorp/ doktorp@mac.com