visual artefacts with opengl under windows

enforceman · Post by **enforceman** » Sat Jan 03, 2004 3:50 pm

Hello!
I loaded a 3ds file an i set a light. Now there are lots of visual artefacts. It looks like a poblem with the z-buffer.

regards, Tom

enforceman · Post by **enforceman** » Sat Jan 03, 2004 3:51 pm

... settings are:

-compiler: mingw g++
-ms windows
-EDT_OPENGL
-nvidia gf 4200ti

niko · Post by **niko** » Sat Jan 03, 2004 6:39 pm

Hm, maybe it is a problem with the 3ds model. I think there are simply more than one polygons at the position where you see the artifacts. That's not good.

rt · Post by rt » Sat Jan 03, 2004 7:02 pm

is the problem you encouter similar to the problem found in this thread (http://irrlicht.sourceforge.net/phpBB2/ ... .php?t=616)?

enforceman · Post by **enforceman** » Sat Jan 03, 2004 7:43 pm

i figured out, that this problem doesn't apear under linux...

SuryIIID_guest · Post by **SuryIIID_guest** » Sat Jan 03, 2004 7:56 pm

First as Niko said make sure that there is no triangles in the model that share one plane and that overlap each other at the same time...heh that's the best way i can describe it.....Ohh wait i can draw it :
these are the vertices of two triangles that lay in the screen plane and their normals are pionting right to your nose

, as you can see they overlap but that's wrong especially if the triangles normals has same direction , check your mesh in wireframe mode and with back face culling enable.
V1
v5
v6

v4
V2
V3

Second - enable the stencil buffer when creating your device
and set the FarValue of the camera to some big number.

Hope this will help...

SuryIIID_guest · Post by **SuryIIID_guest** » Sat Jan 03, 2004 8:00 pm

Sorry there was supposed to be spaces between the vertices but i cann see that phpBB didnt like them

Code: Select all

Irrlicht Engine

visual artefacts with opengl under windows

visual artefacts with opengl under windows

Artefacts