[osg-users] Culling problem
jtracy at ist.ucf.edu
Tue Sep 16 07:59:53 PDT 2008
Try using PolygonOffset.
Vincent Bourdier wrote:
> Hi Paul
> It is exactly the problem.
> I've done some tests with the depth test, and I'm sure that what you
> think is the problem.
> So now, how to solve it ? If I put "depth = new
> osg::Depth(osg::Depth::ALWAYS, 0.0, 1.0);" My plane are always
> visible, but nothing can hide them (mountains for example...)
> Any suggestion or Idea ?
> 2008/9/16 Paul Martz <pmartz at skew-matrix.com
> <mailto:pmartz at skew-matrix.com>>
> If the polygons are very close to the ground and your eye is quite
> distant, then it sounds like it's losing the depth test.
> *From:* osg-users-bounces at lists.openscenegraph.org
> <mailto:osg-users-bounces at lists.openscenegraph.org>
> [mailto:osg-users-bounces at lists.openscenegraph.org
> <mailto:osg-users-bounces at lists.openscenegraph.org>] *On
> Behalf Of *Vincent Bourdier
> *Sent:* Tuesday, September 16, 2008 5:22 AM
> *To:* osg
> *Subject:* [osg-users] Culling problem
> Hi all,
> I have a strange problem : Nodes are moving
> (PAT->LOD->Node.ive) depending on a PAT and all the PATs have
> the same group for parent.
> Theses nodes (planes) have the ground under them but,
> sometimes the planes are hidden under the ground.
> It happens when the camera it on a top-position (not side or
> face ) of the planes and it depend on the point looked by the
> camera. Just modifying camera's orientation make then appear.
> If the camera if near of the plane nothing happen.
> I have checked Z position, but it do not changed anormaly. I
> only see a culling problem to have this problem.
> Do you have already encountered something similar ?
> How to solve this problem ?
> See attached files to understand better what it looks like.
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