For tests, you may derive your ShadowMap from osgShadow::ShadowMap, override
init and cull methods. In this way you will be able to check if init was
called. Of course I have not tested it but the code should look more or less
like this:
#include <cassert>
class MyShadowMap: public osgShadow::ShadowMap {
public :
/** initialize the ShadowedScene and local cached data structures.*/
virtual void init()
{
assert( getShadowedScene() ); // ShadowMap::init does nothing
if this not
set
osgShadow::ShadowMap::init();
// now check if all vital resources were created
assert( osgShadow::ShadowMap::_stateset );
assert( osgShadow::ShadowMap::_camera );
assert( osgShadow::ShadowMap::_texture );
}
/** run the cull traversal of the ShadowedScene and set up the
rendering for this ShadowTechnique.*/
virtual void cull( osgUtil::CullVisitor& cv )
{
// check if all vital resources were created by init
assert( osgShadow::ShadowMap::_stateset );
assert( osgShadow::ShadowMap::_camera );
assert( osgShadow::ShadowMap::_texture );
osgShadow::ShadowMap::cull( cv );
}
};
You may additionally call ShadowedScene->dirty() method. But I doubt it
helps, dirty flag is set anyway on creation, its generally used for
refreshing shadow params. What type of viewer uses your App ? J-S Guay
recently observed some issues with initialization of Shaders in ShadowMap
with CompositeViewer. Maybe this is related somehow.
Cheers,
Wojtek
-----Original Message-----
From: [EMAIL PROTECTED]
[mailto:[EMAIL PROTECTED] Behalf Of DKa
Sent: Wednesday, January 16, 2008 11:17 AM
To: OpenSceneGraph Users
Subject: Re: [osg-users] Adding shadow to an existing scenegraph
> If crash happens, its probably in some function on
> Stack called as result
> of from ShadowMap::cull. I bet getDataVariance is
> called with stateset being
> NULL ? Right ?
Hi, sorry for the late feedback on your new
suggestions. I pretty much do it like in your code
(sm->init after attaching the shadow technique). Still
you're right that the stateset being null is the
problem and this is still not solved.
Something must go wrong in the initialization. I am
building against the library so I cannot put a
breakpoint into the OSG-Code for the init function.
Previously I did not set the texture size for the
shadow map. But it seems this is the only difference
to the stuff you do in order to initialize and set
everything for the shadow.
Cheers,
D.
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