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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_GEOMETRYUTIL2D
#define _INC_ASTRA_GEOMETRYUTIL2D
namespace astra {
struct SParProjection {
// the ray direction
float fRayX, fRayY;
// the start of the (linear) detector
float fDetSX, fDetSY;
// the length of a single detector pixel
float fDetUX, fDetUY;
void translate(double dx, double dy) {
fDetSX += dx;
fDetSY += dy;
}
void scale(double factor) {
fRayX *= factor;
fRayY *= factor;
fDetSX *= factor;
fDetSY *= factor;
fDetUX *= factor;
fDetUY *= factor;
}
};
struct SFanProjection {
// the source
float fSrcX, fSrcY;
// the start of the (linear) detector
float fDetSX, fDetSY;
// the length of a single detector pixel
float fDetUX, fDetUY;
void translate(double dx, double dy) {
fSrcX += dx;
fSrcY += dy;
fDetSX += dx;
fDetSY += dy;
}
void scale(double factor) {
fSrcX *= factor;
fSrcY *= factor;
fDetSX *= factor;
fDetSY *= factor;
fDetUX *= factor;
fDetUY *= factor;
}
};
SParProjection* genParProjections(unsigned int iProjAngles,
unsigned int iProjDets,
double fDetSize,
const float *pfAngles,
const float *pfExtraOffsets);
SFanProjection* genFanProjections(unsigned int iProjAngles,
unsigned int iProjDets,
double fOriginSource, double fOriginDetector,
double fDetSize,
const float *pfAngles);
bool getParParameters(const SParProjection &proj, unsigned int iProjDets, float &fAngle, float &fDetSize, float &fOffset);
bool getFanParameters(const SFanProjection &proj, unsigned int iProjDets, float &fAngle, float &fOriginSource, float &fOriginDetector, float &fDetSize, float &fOffset);
}
#endif
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