Hi Robert
I do all my matrix calculations in the cull, which is renderTraversal. I don't
understand why the camera matrices shouldn't be correct at this time...
Code:
void EfxTracksPrerenderer::ViewData::cull(osgUtil::CullVisitor* a_cv)
{
osg::NodePath l_NodePath = a_cv->getNodePath();
osg::Node* l_Root = l_NodePath.front();
osg::StateSet* l_StateSet = l_Root->getStateSet();
osg::Camera* l_MainCamera = a_cv->getCurrentCamera();
osg::Matrixd l_MainViewMatrix =
(*a_cv->getModelViewMatrix());//l_MainCamera->getViewMatrix();
osg::Matrixd l_MainProjMatrix =
(*a_cv->getProjectionMatrix());//l_MainCamera->getProjectionMatrix();
osg::Matrix l_ViewMatrix;
osg::Matrix l_ProjMatrix;
osg::Vec3d eyePos, centerPos, upPos;
l_MainViewMatrix.getLookAt(eyePos, centerPos, upPos);
// calculate the eye dir vector
osg::Vec3 eyeDir = centerPos - eyePos;
eyeDir.normalize();
// do post perpspective setup of view and projection matrices
// here...
m_Camera->setProjectionMatrix(l_ProjMatrix);
m_Camera->setViewMatrix(l_ViewMatrix);
// compute the matrix which takes a vertex from local coords into tex coords
// will use this later to specify osg::TexGen..
osg::Matrix MVP = m_Camera->getViewMatrix() *
m_Camera->getProjectionMatrix();
osg::Matrix MVPT = l_MainCamera->getInverseViewMatrix() *
MVP *
osg::Matrix::translate(1.0,1.0,1.0) *
osg::Matrix::scale(0.5,0.5,0.5);
m_TextureMatrix = MVPT;
m_Camera->accept(*a_cv);
}
As you see above, I tried with getCurrentCamera and also getting the matrices
from the CullVisitior, which gives identical results.
So I kind of don't understand the issue between updateTraversal and
renderTraversal. I'm probably missing something... I do all my calc in Cull.
The only potential problem I could imagine is because I have a cull thread and
a parallel draw thread, and the matrices are not correctly used? I out of
ideas...[/quote]
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Read this topic online here:
http://forum.openscenegraph.org/viewtopic.php?p=62055#62055
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