Re: [osg-users] Lagging between main camera MV and prerender camera
Hi all I solved the problem! Actually the mistake I made is that the uniform holding the texture-matrix was added to the stateset of the root node. Instead I had to dive into the ShadowedScene, find the stateset of the shadow receiving scene part and add the matrix (and the prerendered texture) there. Now everything is working fine... Cheers, Daniel -- Read this topic online here: http://forum.openscenegraph.org/viewtopic.php?p=62303#62303 ___ osg-users mailing list osg-users@lists.openscenegraph.org http://lists.openscenegraph.org/listinfo.cgi/osg-users-openscenegraph.org
Re: [osg-users] Lagging between main camera MV and prerender camera
Hi Daniel,
If you aren't modifying the modelview matrix in cull then at least in
theory using that value should be safe.
If modelview matrix usage is OK, then my best alternative guess would be
that your render to texture pass is not being done prior to the rendering
of the main scene. You have to set Render to Texture the
Camera::RenderOrder to PRE_RENDER to make sure it's drawn first.
Robert.
On 15 December 2014 at 07:01, Daniel Schmid daniel.sch...@swiss-simtec.ch
wrote:
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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http://forum.openscenegraph.org/viewtopic.php?p=62055#62055
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Re: [osg-users] Lagging between main camera MV and prerender camera
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]
--
Read this topic online here:
http://forum.openscenegraph.org/viewtopic.php?p=62055#62055
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osg-users@lists.openscenegraph.org
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Re: [osg-users] Lagging between main camera MV and prerender camera
Hi Daniel, I faced the same problem http://forum.openscenegraph.org/viewtopic.php?t=14354 How I fixed and hints from Robert. Hope it helps Nick On Fri, Dec 12, 2014 at 4:08 PM, Daniel Schmid daniel.sch...@swiss-simtec.ch wrote: Hi all Trust me, I searched the forum for a hint but couldn't find stuff that could point me into a solution... To understand the situation, please have a look at the screenshot. I have tracks from a vehicle that are prerendered into a texture, and then blended with underground during the main shader. Everything works fine and I'm happy with the visual result. But there is one problem... As soon as I move (rotate) my main camera, the track texture starts to lag with the underground, it looks like if the modelview matrix are nomore in sync. Technical details: The model view and projection matrices for the prerender camera are calculated and passed into a uniform : Code: ... 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); ... The uniform with the textureMatrix is added to the root scene nodes stateset. In the shader, I calculate the TextureMatrix: Code: vec4 ecPos = gl_ModelViewMatrix * gl_Vertex; TexCoordTracksmap = tracksmapTextureMatrix * ecPos; What is the reason for the lagging? What do I have to consider? By the way I use ViewDependentShadowMap, and it also uses prerender camera and they don't produce lagging shadow, so there has to be a solution. Can anybody help?[/code] -- Read this topic online here: http://forum.openscenegraph.org/viewtopic.php?p=62044#62044 ___ osg-users mailing list osg-users@lists.openscenegraph.org http://lists.openscenegraph.org/listinfo.cgi/osg-users-openscenegraph.org -- trajce nikolov nick ___ osg-users mailing list osg-users@lists.openscenegraph.org http://lists.openscenegraph.org/listinfo.cgi/osg-users-openscenegraph.org
Re: [osg-users] Lagging between main camera MV and prerender camera
Hi Daniel, Sounds like you are doing updating the m_TextureMatrix prior to the main Camera being updated. By default the Viewer::updateTraversal() gets the modelview matrix from the CameraManipulator after the update traversal. Some camera manipulators track nodes in the scene so have to be called after the scene has been updated. In your own app you could override Viewer::updateTraversal() and set up the update order as you prefer, or do an update of the m_TextureMatrix after the Viewer::updateTraversal() or force the update of the Camera matrix from the Camera manipulator prior to the call to Viewer::updateTraversal(). Robert. On 12 December 2014 at 15:08, Daniel Schmid daniel.sch...@swiss-simtec.ch wrote: Hi all Trust me, I searched the forum for a hint but couldn't find stuff that could point me into a solution... To understand the situation, please have a look at the screenshot. I have tracks from a vehicle that are prerendered into a texture, and then blended with underground during the main shader. Everything works fine and I'm happy with the visual result. But there is one problem... As soon as I move (rotate) my main camera, the track texture starts to lag with the underground, it looks like if the modelview matrix are nomore in sync. Technical details: The model view and projection matrices for the prerender camera are calculated and passed into a uniform : Code: ... 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); ... The uniform with the textureMatrix is added to the root scene nodes stateset. In the shader, I calculate the TextureMatrix: Code: vec4 ecPos = gl_ModelViewMatrix * gl_Vertex; TexCoordTracksmap = tracksmapTextureMatrix * ecPos; What is the reason for the lagging? What do I have to consider? By the way I use ViewDependentShadowMap, and it also uses prerender camera and they don't produce lagging shadow, so there has to be a solution. Can anybody help?[/code] -- Read this topic online here: http://forum.openscenegraph.org/viewtopic.php?p=62044#62044 ___ osg-users mailing list osg-users@lists.openscenegraph.org http://lists.openscenegraph.org/listinfo.cgi/osg-users-openscenegraph.org ___ osg-users mailing list osg-users@lists.openscenegraph.org http://lists.openscenegraph.org/listinfo.cgi/osg-users-openscenegraph.org
