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/*
-----------------------------------------------------------------------
Copyright: 2010-2016, iMinds-Vision Lab, University of Antwerp
2014-2016, CWI, Amsterdam
Contact: astra@astra-toolbox.com
Website: http://www.astra-toolbox.com/
This file is part of the ASTRA Toolbox.
The ASTRA Toolbox is free software: you can redistribute it and/or modify
it under the terms of the GNU General Public License as published by
the Free Software Foundation, either version 3 of the License, or
(at your option) any later version.
The ASTRA Toolbox is distributed in the hope that it will be useful,
but WITHOUT ANY WARRANTY; without even the implied warranty of
MERCHANTABILITY or FITNESS FOR A PARTICULAR PURPOSE. See the
GNU General Public License for more details.
You should have received a copy of the GNU General Public License
along with the ASTRA Toolbox. If not, see <http://www.gnu.org/licenses/>.
-----------------------------------------------------------------------
*/
#include "astra/Projector3D.h"
#include "astra/VolumeGeometry3D.h"
#include "astra/ParallelProjectionGeometry3D.h"
#include "astra/ParallelVecProjectionGeometry3D.h"
#include "astra/ConeProjectionGeometry3D.h"
#include "astra/ConeVecProjectionGeometry3D.h"
namespace astra
{
//----------------------------------------------------------------------------------------
// Default constructor
CProjector3D::CProjector3D() : configCheckData(0)
{
_clear();
}
//----------------------------------------------------------------------------------------
// Destructor
CProjector3D::~CProjector3D()
{
if (m_bIsInitialized) clear();
}
//----------------------------------------------------------------------------------------
// Clear for constructors
void CProjector3D::_clear()
{
m_pProjectionGeometry = NULL;
m_pVolumeGeometry = NULL;
m_bIsInitialized = false;
}
//----------------------------------------------------------------------------------------
// Clear
void CProjector3D::clear()
{
ASTRA_DELETE(m_pProjectionGeometry);
ASTRA_DELETE(m_pVolumeGeometry);
m_bIsInitialized = false;
}
//----------------------------------------------------------------------------------------
// Check
bool CProjector3D::_check()
{
// projection geometry
ASTRA_CONFIG_CHECK(m_pProjectionGeometry, "Projector3D", "ProjectionGeometry3D not initialized.");
ASTRA_CONFIG_CHECK(m_pProjectionGeometry->isInitialized(), "Projector3D", "ProjectionGeometry3D not initialized.");
// volume geometry
ASTRA_CONFIG_CHECK(m_pVolumeGeometry, "Projector3D", "VolumeGeometry3D not initialized.");
ASTRA_CONFIG_CHECK(m_pVolumeGeometry->isInitialized(), "Projector3D", "VolumeGeometry3D not initialized.");
return true;
}
//---------------------------------------------------------------------------------------
// Initialize, use a Config object
bool CProjector3D::initialize(const Config& _cfg)
{
assert(_cfg.self);
ConfigStackCheck<CProjector3D> CC("Projector3D", this, _cfg);
XMLNode node;
node = _cfg.self.getSingleNode("ProjectionGeometry");
ASTRA_CONFIG_CHECK(node, "Projector3D", "No ProjectionGeometry tag specified.");
std::string type = node.getAttribute("type");
CProjectionGeometry3D* pProjGeometry = 0;
if (type == "parallel3d") {
pProjGeometry = new CParallelProjectionGeometry3D();
} else if (type == "parallel3d_vec") {
pProjGeometry = new CParallelVecProjectionGeometry3D();
} else if (type == "cone") {
pProjGeometry = new CConeProjectionGeometry3D();
} else if (type == "cone_vec") {
pProjGeometry = new CConeVecProjectionGeometry3D();
} else {
// Invalid geometry type
ASTRA_CONFIG_CHECK(false, "Projector3D", "Invalid projection geometry type specified.");
}
pProjGeometry->initialize(Config(node)); // this deletes node
m_pProjectionGeometry = pProjGeometry;
ASTRA_CONFIG_CHECK(m_pProjectionGeometry->isInitialized(), "Projector3D", "ProjectionGeometry not initialized.");
CC.markNodeParsed("ProjectionGeometry");
node = _cfg.self.getSingleNode("VolumeGeometry");
ASTRA_CONFIG_CHECK(node, "Projector3D", "No VolumeGeometry tag specified.");
CVolumeGeometry3D* pVolGeometry = new CVolumeGeometry3D();
pVolGeometry->initialize(Config(node)); // this deletes node
m_pVolumeGeometry = pVolGeometry;
ASTRA_CONFIG_CHECK(m_pVolumeGeometry->isInitialized(), "Projector3D", "VolumeGeometry not initialized.");
CC.markNodeParsed("VolumeGeometry");
return true;
}
/*
bool CProjector3D::initialize(astra::CProjectionGeometry3D *, astra::CVolumeGeometry3D *)
{
ASTRA_ASSERT(false);
return false;
}
*/
//----------------------------------------------------------------------------------------
// Weights of each detector in a projection angle
void CProjector3D::computeProjectionRayWeights(int _iProjection, SPixelWeight* _pfWeightedPixels, int* _piRayStoredPixelCount)
{
int iPixelBufferSize = getProjectionWeightsCount(_iProjection);
int iDetector = 0;
for(iDetector = m_pProjectionGeometry->getDetectorTotCount()-1; iDetector >= 0; --iDetector) {
int iSliceIndex = iDetector / m_pProjectionGeometry->getDetectorColCount();
int iDetectorColIndex = iDetector % m_pProjectionGeometry->getDetectorColCount();
computeSingleRayWeights(_iProjection, // projector index
iSliceIndex, // slice index
iDetectorColIndex, // detector index
&_pfWeightedPixels[iDetector*iPixelBufferSize], // pixel buffer
iPixelBufferSize, // pixel buffer size
_piRayStoredPixelCount[iDetector]); // stored pixel count
}
}
//----------------------------------------------------------------------------------------
} // end namespace
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