// 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;
}
//! set the bounding volume of the node
void DVRVolume::adjustVolume(Volume &volume)
{
volume.setValid();
volume.setEmpty();
DVRVolumeTexturePtr tex = DVRVOLUME_PARAMETER(this, DVRVolumeTexture);
if (tex != NullFC)
{
const Vec3f & res = tex->getResolution ();
const Vec3f & slice = tex->getSliceThickness();
Vec3f minBB(-0.5f * res[0] * slice[0],
-0.5f * res[1] * slice[1],
-0.5f * res[2] * slice[2]);
Vec3f maxBB(-minBB);
volume.extendBy(minBB);
volume.extendBy(maxBB);
}
else
{
// something wrong with initialization - show boundingbox either
Vec3f minBB(-0.5, -0.5, -0.5);
Vec3f maxBB( 0.5, 0.5, 0.5);
volume.extendBy(minBB);
volume.extendBy(maxBB);
}
}
// 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;
}
void DVRVolume::initializeClipObjects( DrawActionBase *action,
const Matrix &volumeToWorld)
{
DVRClipObjectsPtr clipObjects = DVRVOLUME_PARAMETER(this, DVRClipObjects);
if(clipObjects != NullFC &&
clipObjects->getClipMode() != DVRClipObjects::Off)
{
DVRVolumeTexturePtr tex = DVRVOLUME_PARAMETER(this, DVRVolumeTexture);
if(tex != NullFC)
{
const Vec3f &res = tex->getResolution();
const Vec3f &slice = tex->getSliceThickness();
Vec3f diag(res[0] * slice[0],
res[1] * slice[1],
res[2] * slice[2]);
Vec3f sliceDir;
if(getShader()->useMTSlabs())
{
Slicer::getAASlicingDirection(action,&sliceDir);
}
else
{
switch (getTextures2D())
{
case 0: // 3D textures
Slicer::getSlicingDirection(action, &sliceDir);
break;
case 1: // 2D textures
Slicer::getAASlicingDirection(action, &sliceDir);
break;
default: // auto
Window *window = action->getWindow();
if(window->hasExtension(_extTex3D))
Slicer::getSlicingDirection(action, &sliceDir);
else
Slicer::getAASlicingDirection(action, &sliceDir);
}
}
Plane clipReferencePlane(sliceDir, -0.5f * diag.length());
clipObjects->initialize(volumeToWorld, clipReferencePlane);
clipper.setReferencePlane(clipReferencePlane);
}
}
}
// 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;
}