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| author | Willem Jan Palenstijn <Willem.Jan.Palenstijn@cwi.nl> | 2015-11-18 11:26:15 +0100 |
|---|---|---|
| committer | Willem Jan Palenstijn <Willem.Jan.Palenstijn@cwi.nl> | 2015-12-04 12:02:40 +0100 |
| commit | b14fb531ad9ae3d565f2cf28f5506408ab10dbed (patch) | |
| tree | 892d400e72f185b6c4a06aca464343737b135120 /src/ParallelVecProjectionGeometry3D.cpp | |
| parent | 3ea35516aceec4f5817871a00008b109777ebb13 (diff) | |
| download | astra-b14fb531ad9ae3d565f2cf28f5506408ab10dbed.tar.gz astra-b14fb531ad9ae3d565f2cf28f5506408ab10dbed.tar.bz2 astra-b14fb531ad9ae3d565f2cf28f5506408ab10dbed.tar.xz astra-b14fb531ad9ae3d565f2cf28f5506408ab10dbed.zip | |
Add CompositeGeometryManager
This handles FP and BP operations on multiple data objects at once,
splitting them to fit in GPU memory where necessary.
Diffstat (limited to 'src/ParallelVecProjectionGeometry3D.cpp')
| -rw-r--r-- | src/ParallelVecProjectionGeometry3D.cpp | 61 |
1 files changed, 58 insertions, 3 deletions
diff --git a/src/ParallelVecProjectionGeometry3D.cpp b/src/ParallelVecProjectionGeometry3D.cpp index ffad6d0..d04400b 100644 --- a/src/ParallelVecProjectionGeometry3D.cpp +++ b/src/ParallelVecProjectionGeometry3D.cpp @@ -239,9 +239,9 @@ CVector3D CParallelVecProjectionGeometry3D::getProjectionDirection(int _iProject return CVector3D(p.fRayX, p.fRayY, p.fRayZ); } -void CParallelVecProjectionGeometry3D::projectPoint(float32 fX, float32 fY, float32 fZ, - int iAngleIndex, - float32 &fU, float32 &fV) const +void CParallelVecProjectionGeometry3D::projectPoint(double fX, double fY, double fZ, + int iAngleIndex, + double &fU, double &fV) const { ASTRA_ASSERT(iAngleIndex >= 0); ASTRA_ASSERT(iAngleIndex < m_iProjectionAngleCount); @@ -258,6 +258,61 @@ void CParallelVecProjectionGeometry3D::projectPoint(float32 fX, float32 fY, floa } +void CParallelVecProjectionGeometry3D::backprojectPointX(int iAngleIndex, double fU, double fV, + double fX, double &fY, double &fZ) const +{ + ASTRA_ASSERT(iAngleIndex >= 0); + ASTRA_ASSERT(iAngleIndex < m_iProjectionAngleCount); + + SPar3DProjection &proj = m_pProjectionAngles[iAngleIndex]; + + double px = proj.fDetSX + fU * proj.fDetUX + fV * proj.fDetVX; + double py = proj.fDetSY + fU * proj.fDetUY + fV * proj.fDetVY; + double pz = proj.fDetSZ + fU * proj.fDetUZ + fV * proj.fDetVZ; + + double a = (fX - px) / proj.fRayX; + + fY = py + a * proj.fRayY; + fZ = pz + a * proj.fRayZ; +} + +void CParallelVecProjectionGeometry3D::backprojectPointY(int iAngleIndex, double fU, double fV, + double fY, double &fX, double &fZ) const +{ + ASTRA_ASSERT(iAngleIndex >= 0); + ASTRA_ASSERT(iAngleIndex < m_iProjectionAngleCount); + + SPar3DProjection &proj = m_pProjectionAngles[iAngleIndex]; + + double px = proj.fDetSX + fU * proj.fDetUX + fV * proj.fDetVX; + double py = proj.fDetSY + fU * proj.fDetUY + fV * proj.fDetVY; + double pz = proj.fDetSZ + fU * proj.fDetUZ + fV * proj.fDetVZ; + + double a = (fY - py) / proj.fRayY; + + fX = px + a * proj.fRayX; + fZ = pz + a * proj.fRayZ; +} + +void CParallelVecProjectionGeometry3D::backprojectPointZ(int iAngleIndex, double fU, double fV, + double fZ, double &fX, double &fY) const +{ + ASTRA_ASSERT(iAngleIndex >= 0); + ASTRA_ASSERT(iAngleIndex < m_iProjectionAngleCount); + + SPar3DProjection &proj = m_pProjectionAngles[iAngleIndex]; + + double px = proj.fDetSX + fU * proj.fDetUX + fV * proj.fDetVX; + double py = proj.fDetSY + fU * proj.fDetUY + fV * proj.fDetVY; + double pz = proj.fDetSZ + fU * proj.fDetUZ + fV * proj.fDetVZ; + + double a = (fZ - pz) / proj.fRayZ; + + fX = px + a * proj.fRayX; + fY = py + a * proj.fRayY; +} + + //---------------------------------------------------------------------------------------- bool CParallelVecProjectionGeometry3D::_check() |