m_trace = trace;
double start_angle = (iStartView + iOffsetView) * proj.rotInc();
-#ifndef HAVE_OPENMP
- // Without OpenMP, precalculate source and detector at view 0, then rotate incrementally each time
- GRFMTX_2D rotmtx_initial;
- mtx2_offset_rot (rotmtx_initial, start_angle, m_dXCenter, m_dYCenter);
- double xd1=0, yd1=0, xd2=0, yd2=0;
- if (m_idGeometry != GEOMETRY_EQUIANGULAR) {
- xd1 = m_initPos.xd1; yd1 = m_initPos.yd1;
- xd2 = m_initPos.xd2; yd2 = m_initPos.yd2;
- xform_mtx2 (rotmtx_initial, xd1, yd1); // rotate detector endpoints
- xform_mtx2 (rotmtx_initial, xd2, yd2); // to initial view_angle
- }
-
- double xs1 = m_initPos.xs1, ys1 = m_initPos.ys1;
- double xs2 = m_initPos.xs2, ys2 = m_initPos.ys2;
- xform_mtx2 (rotmtx_initial, xs1, ys1); // rotate source endpoints to
- xform_mtx2 (rotmtx_initial, xs2, ys2); // initial view angle
-#else
+#ifdef HAVE_OPENMP
#pragma omp parallel for
#endif
-
+
for (int iView = 0; iView < iNumViews; iView++) {
double viewAngle = start_angle + (iView * proj.rotInc());
-
-#ifdef HAVE_OPENMP
+
// With OpenMP, need to calculate source and detector positions at each view
GRFMTX_2D rotmtx;
mtx2_offset_rot (rotmtx, viewAngle, m_dXCenter, m_dYCenter);
xform_mtx2 (rotmtx, xd1, yd1); // rotate detector endpoints
xform_mtx2 (rotmtx, xd2, yd2); // to initial view_angle
}
-
+
double xs1 = m_initPos.xs1, ys1 = m_initPos.ys1;
double xs2 = m_initPos.xs2, ys2 = m_initPos.ys2;
xform_mtx2 (rotmtx, xs1, ys1); // rotate source endpoints to
xform_mtx2 (rotmtx, xs2, ys2); // initial view angle
-#endif
-
+
int iStoragePosition = iView + iStorageOffset;
DetectorArray& detArray = proj.getDetectorArray( iStoragePosition );
m_pSGP->setMarker (SGP::MARKER_BDIAMOND);
-
m_pSGP->setColor (C_BLACK);
m_pSGP->setPenWidth (2);
if (m_idGeometry == GEOMETRY_PARALLEL) {
}
#endif
-#ifndef HAVE_OPENMP
- // Without OpenMP, incrementally rotate source and detectors
- xform_mtx2 (m_rotmtxIncrement, xs1, ys1);
- xform_mtx2 (m_rotmtxIncrement, xs2, ys2);
- if (m_idGeometry != GEOMETRY_EQUIANGULAR) {
- xform_mtx2 (m_rotmtxIncrement, xd1, yd1); // rotate detector endpoints
- xform_mtx2 (m_rotmtxIncrement, xd2, yd2);
- }
-#endif
} /* for each iView */
}
*/
double
-Scanner::projectSingleLine (const Phantom& phm, const double x1, const double y1, const double x2, const double y2)
+Scanner::projectSingleLine (const Phantom& phm, double x1, double y1, double x2, double y2)
{
- // check ray against each pelem in Phantom
double rsum = 0.0;
- for (PElemConstIterator i = phm.listPElem().begin(); i != phm.listPElem().end(); i++)
- rsum += projectLineAgainstPElem (**i, x1, y1, x2, y2);
+ if (phm.isImagefile()) {
+ // Project through an imagefile
+
+ const ImageFile* im = phm.getImagefile();
+ const ImageFileArray v = im->getArray();
+ int nx = im->nx(), ny = im->ny();
+
+ // Convert endpoints into image pixel coordinates
+ double xmin=0, xmax=nx, ymin=0, ymax=ny; // default coordinate
+ if (! im->getAxisExtent (xmin, xmax, ymin, ymax)) {
+ sys_error(ERR_WARNING, "Axis extent not available [Scanner::projectSingleLine]");
+ }
+ double rect[4];
+ rect[0] = xmin; rect[1] = ymin;
+ rect[2] = xmax; rect[3] = ymax;
+ bool accept = clip_rect (x1, y1, x2, y2, rect);
+ if (! accept)
+ return (0.0);
+
+ double xlen = xmax - xmin, ylen = ymax - ymin;
+ double px1 = nx * (x1 - xmin) / xlen;
+ double px2 = nx * (x2 - xmin) / xlen;
+ double py1 = ny * (y1 - ymin) / ylen;
+ double py2 = ny * (y2 - ymin) / ylen;
+
+ // Use Bresenham integer line stepping to step to each pixel, and walked through image
+
+ sys_error(ERR_WARNING, "Not yet able to project through imagefile. Line (%.3f,%.3f) - (%.3f,%.3f)", px1, py1, px2, py2);
+
+ } else {
+
+ // Project through each pelem in Phantom
+ for (PElemConstIterator i = phm.listPElem().begin(); i != phm.listPElem().end(); i++)
+ rsum += projectLineAgainstPElem (**i, x1, y1, x2, y2);
+ }
return (rsum);
}