View Full Version : Opengl debugging
Lowercase
24-10-2009, 03:42 PM
Hello,
I'am translating a program form C to pascal.
It works fine, but i have some trouble with opengl rendering, since the result is not exactly the same.
http://img19.imagevenue.com/loc489/th_98212_myprog_122_489lo.jpg my pascal program (http://img19.imagevenue.com/img.php?image=98212_myprog_122_489lo.jpg)
http://img219.imagevenue.com/loc354/th_98214_Cprog_122_354lo.jpg C program (http://img219.imagevenue.com/img.php?image=98214_Cprog_122_354lo.jpg)
I compared the 2 program with glintercept and there's no difference in the dumps.
maybe there's an option i missed, or is there a more powerful tool ?
User137
25-10-2009, 12:33 PM
Oh my god.. use tinypic or imageshack for ad-less links :o
It's hard to know the problem from these 2 pictures alone. It could be something like dithering, window color resolution, nearest/bilinear filtering. At least i see neither of images use anti-aliasing so that is not the case.
JSoftware
25-10-2009, 12:58 PM
Looks like you either use nearest filtering or no mip mapping in your delphi app
Lowercase
25-10-2009, 02:29 PM
Oh my god.. use tinypic or imageshack for ad-less links :o
Sorry, I never noticed ad since i'm using firefox and adblock plus. sorry for that :(
by the way, it's true i had problems with textures. C program uses glaux to load texture, I had to write another texture loader.
the fun fact is, I don't have any glaux.dll on my computer, and this C program is able to run without it :o I don't understand why ??
User137
25-10-2009, 06:11 PM
Take another comparing images from very close to see borders of triangles and textures in detail.
Lowercase
13-11-2009, 08:12 PM
sorry for being so late, i had some problems with windows 7...
so here is another screenshot
http://img690.imageshack.us/img690/2425/smalln.th.png (http://img690.imageshack.us/i/smalln.png/)
pjpdev
14-11-2009, 12:07 AM
Sorry, I never noticed ad since i'm using firefox and adblock plus. sorry for that :(
by the way, it's true i had problems with textures. C program uses glaux to load texture, I had to write another texture loader.
the fun fact is, I don't have any glaux.dll on my computer, and this C program is able to run without it :o I don't understand why ??
GLAux is probably statically linked in the C program, so it won't need glaux.dll. Another thing I picked up on the OpenGL wiki (http://www.opengl.org/wiki/Getting_started) is this:
GLaux, do not use GLaux. It is 15 years old and considered deprecated
So rather use something like SDL for image loading.
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