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/*
-----------------------------------------------------------------------
Copyright: 2010-2018, imec Vision Lab, University of Antwerp
2014-2018, 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/>.
-----------------------------------------------------------------------
*/
#ifndef _INC_ASTRA_PARALLELVECPROJECTIONGEOMETRY3D
#define _INC_ASTRA_PARALLELVECPROJECTIONGEOMETRY3D
#include "ProjectionGeometry3D.h"
#include "GeometryUtil3D.h"
namespace astra
{
/**
* This class defines a 3D parallel beam projection geometry.
*
* \par XML Configuration
* \astra_xml_item{DetectorRowCount, int, Number of detectors for each projection.}
* \astra_xml_item{DetectorColCount, int, Number of detectors for each projection.}
*
* \par MATLAB example
* \astra_code{
* proj_geom = astra_struct('parallel3d_vec');\n
* proj_geom.DetectorRowCount = 512;\n
* proj_geom.DetectorColCount = 512;\n
* proj_geom.Vectors = V;\n
* }
*
* \par Vectors
* Vectors is a matrix containing the actual geometry. Each row corresponds
* to a single projection, and consists of:
* ( rayX, rayY, rayZ, dX, dY, dZ, uX, uY, uZ, vX, vY, vZ )
* ray: the ray direction
* d : the centre of the detector plane
* u : the vector from detector pixel (0,0) to (0,1)
* v : the vector from detector pixel (0,0) to (1,0)
*/
class _AstraExport CParallelVecProjectionGeometry3D : public CProjectionGeometry3D
{
protected:
SPar3DProjection *m_pProjectionAngles;
public:
/** Default constructor. Sets all numeric member variables to 0 and all pointer member variables to NULL.
*
* If an object is constructed using this default constructor, it must always be followed by a call
* to one of the initialize() methods before the object can be used. Any use before calling initialize()
* is not allowed, except calling the member function isInitialized().
*/
CParallelVecProjectionGeometry3D();
/** Constructor. Create an instance of the CParallelProjectionGeometry3D class.
*
* @param _iProjectionAngleCount Number of projection angles.
* @param _iDetectorRowCount Number of rows of detectors.
* @param _iDetectorColCount Number of columns detectors.
* @param _pProjectionAngles Pointer to an array of projection angles. The angles will be copied from this array.
*/
CParallelVecProjectionGeometry3D(int _iProjectionAngleCount,
int _iDetectorRowCount,
int _iDetectorColCount,
const SPar3DProjection* _pProjectionAngles);
/** Copy constructor.
*/
CParallelVecProjectionGeometry3D(const CParallelVecProjectionGeometry3D& _projGeom);
/** Destructor.
*/
~CParallelVecProjectionGeometry3D();
/** Initialize the geometry with a config object.
*
* @param _cfg Configuration Object
* @return initialization successful?
*/
virtual bool initialize(const Config& _cfg);
/** Initialize the geometry. If the object has been initialized before, the object is reinitialized
* and memory is freed and reallocated if necessary.
*
* @param _iProjectionAngleCount Number of projection angles.
* @param _iDetectorRowCount Number of rows of detectors.
* @param _iDetectorColCount Number of columns detectors.
* @param _pProjectionAngles Pointer to an array of projection angles. The angles will be copied from this array.
*/
bool initialize(int _iProjectionAngleCount,
int _iDetectorRowCount,
int _iDetectorColCount,
const SPar3DProjection* _pProjectionAngles);
virtual bool _check();
/** Create a hard copy.
*/
virtual CProjectionGeometry3D* clone() const;
/** Return true if this geometry instance is the same as the one specified.
*
* @return true if this geometry instance is the same as the one specified.
*/
virtual bool isEqual(const CProjectionGeometry3D*) const;
/** Get all settings in a Config object.
*
* @return Configuration Object.
*/
virtual Config* getConfiguration() const;
/** Returns true if the type of geometry defined in this class is the one specified in _sType.
*
* @param _sType geometry type to compare to.
* @return true if _sType == "parallel3d_vec".
*/
virtual bool isOfType(const std::string& _sType) const;
/**
* Returns a vector giving the projection direction for a projection and detector index
*/
virtual CVector3D getProjectionDirection(int _iProjectionIndex, int _iDetectorIndex) const;
const SPar3DProjection* getProjectionVectors() const { return m_pProjectionAngles; }
virtual void projectPoint(double fX, double fY, double fZ,
int iAngleIndex,
double &fU, double &fV) const;
virtual void backprojectPointX(int iAngleIndex, double fU, double fV,
double fX, double &fY, double &fZ) const;
virtual void backprojectPointY(int iAngleIndex, double fU, double fV,
double fY, double &fX, double &fZ) const;
virtual void backprojectPointZ(int iAngleIndex, double fU, double fV,
double fZ, double &fX, double &fY) const;
protected:
virtual bool initializeAngles(const Config& _cfg);
};
} // namespace astra
#endif /* _INC_ASTRA_PARALLELVECPROJECTIONGEOMETRY3D */
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