// Create a volume rendering node with all desired attachments
NodePtr makeVolume(ImagePtr datImage)
{
vol = DVRVolume::create();
DVRAppearancePtr app = DVRAppearance::create();
DVRVolumeTexturePtr tex = DVRVolumeTexture::create();
beginEditCP(tex);
tex->setImage(datImage);
endEditCP(tex);
// Attach the volume texture to the appearance
beginEditCP(app, Node::AttachmentsFieldMask);
app->addAttachment(tex);
endEditCP (app, Node::AttachmentsFieldMask);
// Assign the appearance to the volume core
beginEditCP(vol);
vol->setAppearance(app);
vol->setShader(DVRSimpleShader::create());
endEditCP(vol);
// Create a node for the volume core
NodePtr newGeom = Node::create();
beginEditCP(newGeom);
newGeom->setCore(vol);
endEditCP(newGeom);
return newGeom;
}
// Create a volume rendering node with all desired attachments
NodePtr makeVolume( const char * datFile)
{
DVRVolumePtr vol = DVRVolume::create();
DVRAppearancePtr app = DVRAppearance::create();
DVRVolumeTexturePtr tex = DVRVolumeTexture::create();
DVRLookupTablePtr lut = DVRLookupTable::create();
volume = vol;
// Load the 3D-image and store it in the volume texture attachment
ImagePtr datImage = Image::create();
if (false == datImage->read(datFile)) {
SLOG << "File: " << datFile << " not found" << std::endl;
exit (-1);
}
beginEditCP(tex);
tex->setImage(datImage);
tex->setFileName(datFile);
endEditCP(tex);
//!! FIXME - Initialize the lookup table
//!! This should not be neccessary if the OpenSG reader works correctly
beginEditCP(lut, DVRLookupTable::TouchedFieldMask);
lut->setTouched(true);
endEditCP(lut, DVRLookupTable::TouchedFieldMask);
// Initialize the lookup table
beginEditCP(lut, DVRLookupTable::DataFieldMask);
for (int i = 0; i < 1024; i++)
lut->getData()[i] = lutData[i];
endEditCP(lut, DVRLookupTable::DataFieldMask);
// Attach the volume texture and lookup table to the appearance
beginEditCP(app, Node::AttachmentsFieldMask);
app->addAttachment(tex);
app->addAttachment(lut);
endEditCP (app, Node::AttachmentsFieldMask);
// Create a shader
shader = DVRSimpleLUTShader::create();
// Assign the appearance and shader to the volume core
beginEditCP(vol);
vol->setFileName(datFile);
vol->setAppearance(app);
vol->setShader(shader);
endEditCP(vol);
// Create a node for the volume core
NodePtr newGeom = Node::create();
beginEditCP(newGeom);
newGeom->setCore(vol);
endEditCP(newGeom);
return newGeom;
}
// react to keys
void keyboard(unsigned char k, int OSG_CHECK_ARG(x), int OSG_CHECK_ARG(y))
{
switch(k)
{
case 27:
{
OSG::osgExit();
exit(0);
}
break;
case 'a':
{
OSG::beginEditCP(vol, OSG::DVRVolume::SamplingFieldMask);
vol->setSampling(vol->getSampling() * 1.1);
OSG::endEditCP(vol, OSG::DVRVolume::SamplingFieldMask);
std::cout << "Sampling set to " << vol->getSampling()
<< std::endl;
glutPostRedisplay();
}
break;
case 'z':
{
OSG::beginEditCP(vol, OSG::DVRVolume::SamplingFieldMask);
vol->setSampling(vol->getSampling() * 0.9);
OSG::endEditCP(vol, OSG::DVRVolume::SamplingFieldMask);
std::cout << "Sampling set to " << vol->getSampling()
<< std::endl;
glutPostRedisplay();
}
break;
}
}
// Create a volume rendering node with all desired attachments
NodePtr makeVolume( const char * datFile)
{
DVRVolumePtr vol = DVRVolume::create();
DVRAppearancePtr app = DVRAppearance::create();
DVRVolumeTexturePtr tex = DVRVolumeTexture::create();
// Load the 3D-image and store it in the volume texture attachment
ImagePtr datImage = Image::create();
if (false == datImage->read(datFile)) {
SLOG << "File: " << datFile << " not found" << std::endl;
exit (-1);
}
beginEditCP(tex);
tex->setImage(datImage);
tex->setFileName(datFile);
endEditCP(tex);
// Attach the volume texture to the appearance
beginEditCP(app, Node::AttachmentsFieldMask);
app->addAttachment(tex);
endEditCP (app, Node::AttachmentsFieldMask);
// Assign the appearance to the volume core
beginEditCP(vol);
vol->setFileName(datFile);
vol->setAppearance(app);
vol->setShader(DVRSimpleShader::create());
endEditCP(vol);
// Create a node for the volume core
NodePtr newGeom = Node::create();
beginEditCP(newGeom);
newGeom->setCore(vol);
endEditCP(newGeom);
return newGeom;
}