diff options
Diffstat (limited to 'include/astra/ParallelBeamStripKernelProjector2D.inl')
| -rw-r--r-- | include/astra/ParallelBeamStripKernelProjector2D.inl | 25 |
1 files changed, 12 insertions, 13 deletions
diff --git a/include/astra/ParallelBeamStripKernelProjector2D.inl b/include/astra/ParallelBeamStripKernelProjector2D.inl index bed02ab..2031560 100644 --- a/include/astra/ParallelBeamStripKernelProjector2D.inl +++ b/include/astra/ParallelBeamStripKernelProjector2D.inl @@ -147,19 +147,6 @@ void CParallelBeamStripKernelProjector2D::projectBlock_internal(int _iProjFrom, const float32 relPixelArea = pixelArea / rayWidth; bool vertical = fabs(proj->fRayX) < fabs(proj->fRayY); - if (vertical) { - RxOverRy = proj->fRayX/proj->fRayY; - deltac = -m_pVolumeGeometry->getPixelLengthY() * RxOverRy * inv_pixelLengthX; - S = 0.5f - 0.5f*fabs(RxOverRy); - T = 0.5f + 0.5f*fabs(RxOverRy); - invTminS = 1.0f / (T-S); - } else { - RyOverRx = proj->fRayY/proj->fRayX; - deltar = -m_pVolumeGeometry->getPixelLengthX() * RyOverRx * inv_pixelLengthY; - S = 0.5f - 0.5f*fabs(RyOverRx); - T = 0.5f + 0.5f*fabs(RyOverRx); - invTminS = 1.0f / (T-S); - } Ex = m_pVolumeGeometry->getWindowMinX() + pixelLengthX*0.5f; Ey = m_pVolumeGeometry->getWindowMaxY() - pixelLengthY*0.5f; @@ -180,6 +167,12 @@ void CParallelBeamStripKernelProjector2D::projectBlock_internal(int _iProjFrom, // vertically if (vertical) { + RxOverRy = proj->fRayX/proj->fRayY; + deltac = -m_pVolumeGeometry->getPixelLengthY() * RxOverRy * inv_pixelLengthX; + S = 0.5f - 0.5f*fabs(RxOverRy); + T = 0.5f + 0.5f*fabs(RxOverRy); + invTminS = 1.0f / (T-S); + // calculate cL and cR for row 0 cL = (DLx + (Ey - DLy)*RxOverRy - Ex) * inv_pixelLengthX; cR = (DRx + (Ey - DRy)*RxOverRy - Ex) * inv_pixelLengthX; @@ -233,6 +226,12 @@ void CParallelBeamStripKernelProjector2D::projectBlock_internal(int _iProjFrom, // horizontally else { + RyOverRx = proj->fRayY/proj->fRayX; + deltar = -m_pVolumeGeometry->getPixelLengthX() * RyOverRx * inv_pixelLengthY; + S = 0.5f - 0.5f*fabs(RyOverRx); + T = 0.5f + 0.5f*fabs(RyOverRx); + invTminS = 1.0f / (T-S); + // calculate rL and rR for row 0 rL = -(DLy + (Ex - DLx)*RyOverRx - Ey) * inv_pixelLengthY; rR = -(DRy + (Ex - DRx)*RyOverRx - Ey) * inv_pixelLengthY; |