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/*
-----------------------------------------------------------------------
Copyright: 2010-2021, imec Vision Lab, University of Antwerp
2014-2021, 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_GEOMETRYUTIL3D
#define _INC_ASTRA_GEOMETRYUTIL3D
namespace astra {
struct SConeProjection {
// the source
double fSrcX, fSrcY, fSrcZ;
// the origin ("bottom left") of the (flat-panel) detector
double fDetSX, fDetSY, fDetSZ;
// the U-edge of a detector pixel
double fDetUX, fDetUY, fDetUZ;
// the V-edge of a detector pixel
double fDetVX, fDetVY, fDetVZ;
void translate(double dx, double dy, double dz) {
fSrcX += dx;
fSrcY += dy;
fSrcZ += dz;
fDetSX += dx;
fDetSY += dy;
fDetSZ += dz;
}
void scale(double fx, double fy, double fz) {
fSrcX *= fx;
fSrcY *= fy;
fSrcZ *= fz;
fDetSX *= fx;
fDetSY *= fy;
fDetSZ *= fz;
fDetUX *= fx;
fDetUY *= fy;
fDetUZ *= fz;
fDetVX *= fx;
fDetVY *= fy;
fDetVZ *= fz;
}
};
struct SPar3DProjection {
// the ray direction
double fRayX, fRayY, fRayZ;
// the origin ("bottom left") of the (flat-panel) detector
double fDetSX, fDetSY, fDetSZ;
// the U-edge of a detector pixel
double fDetUX, fDetUY, fDetUZ;
// the V-edge of a detector pixel
double fDetVX, fDetVY, fDetVZ;
void translate(double dx, double dy, double dz) {
fDetSX += dx;
fDetSY += dy;
fDetSZ += dz;
}
void scale(double fx, double fy, double fz) {
fRayX *= fx;
fRayY *= fy;
fRayZ *= fz;
fDetSX *= fx;
fDetSY *= fy;
fDetSZ *= fz;
fDetUX *= fx;
fDetUY *= fy;
fDetUZ *= fz;
fDetVX *= fx;
fDetVY *= fy;
fDetVZ *= fz;
}
};
void computeBP_UV_Coeffs(const SPar3DProjection& proj,
double &fUX, double &fUY, double &fUZ, double &fUC,
double &fVX, double &fVY, double &fVZ, double &fVC);
void computeBP_UV_Coeffs(const SConeProjection& proj,
double &fUX, double &fUY, double &fUZ, double &fUC,
double &fVX, double &fVY, double &fVZ, double &fVC,
double &fDX, double &fDY, double &fDZ, double &fDC);
SConeProjection* genConeProjections(unsigned int iProjAngles,
unsigned int iProjU,
unsigned int iProjV,
double fOriginSourceDistance,
double fOriginDetectorDistance,
double fDetUSize,
double fDetVSize,
const float *pfAngles);
SPar3DProjection* genPar3DProjections(unsigned int iProjAngles,
unsigned int iProjU,
unsigned int iProjV,
double fDetUSize,
double fDetVSize,
const float *pfAngles);
}
#endif
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