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Added checks to prevent crashes when no imagery is assigend to volume

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This commit is contained in:
Robert Osfield
2009-05-05 11:03:57 +00:00
parent 396e83dee3
commit ee3bfe94a3
1 changed files with 24 additions and 7 deletions
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31
src/osgVolume/RayTracedTechnique.cpp
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@@ -51,21 +51,38 @@ enum ShadingModel
void RayTracedTechnique::init()
{
osg::notify(osg::NOTICE)<<"RayTracedTechnique::init()"<<std::endl;
if (!_volumeTile) return;
osg::notify(osg::INFO)<<"RayTracedTechnique::init()"<<std::endl;
if (!_volumeTile)
{
osg::notify(osg::NOTICE)<<"RayTracedTechnique::init(), error no volume tile assigned."<<std::endl;
return;
}
if (_volumeTile->getLayer()==0)
{
osg::notify(osg::NOTICE)<<"RayTracedTechnique::init(), error no layer assigend to volume tile."<<std::endl;
return;
}
if (_volumeTile->getLayer()->getImage()==0)
{
osg::notify(osg::NOTICE)<<"RayTracedTechnique::init(), error no image assigned to layer."<<std::endl;
return;
}
ShadingModel shadingModel = Isosurface;
float alphaFuncValue = 0.1;
_geode = new osg::Geode;
osg::Image* image_3d = 0;
osg::TransferFunction1D* tf = 0;
osgVolume::Locator* masterLocator = _volumeTile->getLocator();
image_3d = _volumeTile->getLayer()->getImage();
CollectPropertiesVisitor cpv;
if (_volumeTile->getLayer()->getProperty())
{