Hi,
ShadowMap::cull invokes culls traversal for both main camera
(ShadowReceiving) graph & shadow camera (ShadowCasting) graphs. So if you
block whole cull on ShadowMap level - it won't draw the scene as well. The
trick is to block only the portion that culls ShadowCasting graph.
See the osgShadow::ShadowMap::cull method (src/ osgShadow / ShadowMap.cpp)
Line 330: _shadowedScene->osg::Group::traverse(cv);
Thats the line where Scene traversal is invoked
&
Line 469 : _camera->accept(cv);
Thats the line which calls cull traversal on Shadow Map camera.
Cheers,
Wojtek Lewandowski
----- Original Message -----
From: "Jean-Sébastien Guay" <[EMAIL PROTECTED]>
To: "OpenSceneGraph Users" <osg-users@lists.openscenegraph.org>
Sent: Monday, February 11, 2008 4:20 PM
Subject: Re: [osg-users] osgShadow one shot shadow map
> Hello Sebastian,
>
>> I'm quite confused regarding the osgShadow implementation.
>> My scene and my light-positions are static. My idea was to capture the
>> shadow-map only once
>> and apply it consecutively in all frames. I'm a bit lost where to start.
>> Neither update nor cull seems to be the right place.
>> Any hints?
>
> As you have seen, it was not designed to do that. It's designed to
> recalculate the shadow map each frame. I guess you could add a boolean
> to it to say that it has been calculated, and then not redo it again...
> Maybe just something like:
>
> class myShadowMap : public osgShadow::ShadowMap
> {
> public:
> myShadowMap() : _done(false) {}
>
> virtual void update(osg::NodeVisitor& nv)
> {
> if (!_done)
> osgShadow::ShadowMap::update(nv);
> }
>
> virtual void cull(osgUtil::CullVisitor& cv)
> {
> if (!_done)
> {
> osgShadow::ShadowMap::cull(cv);
> _done = true;
> }
> }
>
> private:
> bool _done;
> };
>
> Note that I didn't try this, but it might give you something to start
> with? Let us know how it goes.
>
> Hope this helps,
>
> J-S
> --
> ______________________________________________________
> Jean-Sebastien Guay [EMAIL PROTECTED]
> http://www.cm-labs.com/
> http://whitestar02.webhop.org/
> _______________________________________________
> osg-users mailing list
> osg-users@lists.openscenegraph.org
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>
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