Ok, so I found this:
http://www.openscenegraph.org/projects/osg/wiki/Support/OpenGL2OSGLookup
So I am now doing this:
Code:
osg::ref_ptrosg::LightModel lightModel = new osg::LightModel;
// http://www.glprogramming.com/red/chapter05.html
// OpenGL reverses the surface normals for back-facing
@cbuchner1
Hmm, well I bet a lot of software relies on that feature...
By the way I am using NVIDIA GeForce GTX 550 Ti and it works here.
When I tried two sided lighting yesterday, I found that the back faces were
lit, but not in the same way as the front faces.
Well what I did was to make
@cbuchner1
Hmm, well I bet a lot of software relies on that feature...
I found threads by the Blender team who had to create workarounds because
on some newer Geforce cards (4xx and 5xx series) suddenly the viewport
update were orders of magnitude slower.
On Thu, Mar 14, 2013 at 3:43 AM, Christian Buchner
christian.buch...@gmail.com wrote:
When I tried two sided lighting yesterday, I found that the back faces
were lit, but not in the same way as the front faces.
Are your front and back material colors set to the same values, or to
different
The front and back material properties were set to same values, it's just
that when doing the calculations for the back side, the normal vector is
not pointing towards the light source but away from it.
I only looked at this issue briefly, and concluded that it would take some
GLSL to fix it.
...@lists.openscenegraph.org
[mailto:osg-users-boun...@lists.openscenegraph.org] On Behalf Of
Christian Buchner
Sent: Thursday, March 14, 2013 10:46 AM
To: OpenSceneGraph Users
Subject: Re: [osg-users] [forum] Rendering backface like front face
The front and back material properties were set to same values, it's
just
...).
-Original Message-
From: osg-users-boun...@lists.openscenegraph.org
[mailto:osg-users-boun...@lists.openscenegraph.org] On Behalf Of
Christian Buchner
Sent: Thursday, March 14, 2013 10:46 AM
To: OpenSceneGraph Users
Subject: Re: [osg-users] [forum] Rendering backface like front face
To: OpenSceneGraph Users
Subject: Re: [osg-users] [forum] Rendering backface like front face
There are a couple different scenarios.
If a surface is composed of triangles that all have a normal consistent
with the winding order, but some of the triangles are facing the wrong
way, then two-sided lighting
Hi,
sorry if this may be too obvious. I was wondering if there is some kind of
backface mode where backfaces are rendered like the front face?
We have a model here that looks normal in Rhino and SimLab Composer because
they seem to be able to render that way (backface like front face) - see
Did you try turning on 2-sided lighting?
On Wed, Mar 13, 2013 at 11:47 AM, Florian Kolbe florian.ko...@in-gmbh.dewrote:
Hi,
sorry if this may be too obvious. I was wondering if there is some kind
of backface mode where backfaces are rendered like the front face?
We have a model here
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