/*****************************************************************************
** FILE IDENTIFICATION
**
-** Name: scanner.cpp
+** Name: scanner.cpp
** Purpose: Classes for CT scanner
** Programmer: Kevin Rosenberg
** Date Started: 1984
**
** This is part of the CTSim program
-** Copyright (C) 1983-2000 Kevin Rosenberg
+** Copyright (c) 1983-2001 Kevin Rosenberg
**
-** $Id: scanner.cpp,v 1.25 2001/01/17 11:00:18 kevin Exp $
+** $Id$
**
** This program is free software; you can redistribute it and/or modify
** it under the terms of the GNU General Public License (version 2) as
const int Scanner::GEOMETRY_PARALLEL = 0;
const int Scanner::GEOMETRY_EQUIANGULAR = 1;
const int Scanner::GEOMETRY_EQUILINEAR = 2;
+const int Scanner::GEOMETRY_LINOGRAM = 3;
-const char* Scanner::s_aszGeometryName[] =
+const char* const Scanner::s_aszGeometryName[] =
{
- {"parallel"},
- {"equiangular"},
- {"equilinear"},
+ "parallel",
+ "equiangular",
+ "equilinear",
+ "linogram",
};
-const char* Scanner::s_aszGeometryTitle[] =
+const char* const Scanner::s_aszGeometryTitle[] =
{
- {"Parallel"},
- {"Equiangular"},
- {"Equilinear"},
+ "Parallel",
+ "Equiangular",
+ "Equilinear",
+ "Linogram",
};
const int Scanner::s_iGeometryCount = sizeof(s_aszGeometryName) / sizeof(const char*);
// NAME
-// DetectorArray Construct a DetectorArray
+// DetectorArray Construct a DetectorArray
DetectorArray::DetectorArray (const int nDet)
{
// NAME
-// ~DetectorArray Free memory allocated to a detector array
+// ~DetectorArray Free memory allocated to a detector array
DetectorArray::~DetectorArray (void)
{
/* NAME
-* Scanner::Scanner Construct a user specified detector structure
+* Scanner::Scanner Construct a user specified detector structure
*
* SYNOPSIS
* Scanner (phm, nDet, nView, nSample)
-* Phantom& phm PHANTOM that we are making detector for
+* Phantom& phm PHANTOM that we are making detector for
* int geomety Geometry of detector
-* int nDet Number of detector along detector array
-* int nView Number of rotated views
-* int nSample Number of rays per detector
+* int nDet Number of detector along detector array
+* int nView Number of rotated views
+* int nSample Number of rays per detector
*/
-Scanner::Scanner (const Phantom& phm, const char* const geometryName, int nDet, int nView, int nSample, const double rot_anglen, const double dFocalLengthRatio, const double dFieldOfViewRatio)
+Scanner::Scanner (const Phantom& phm, const char* const geometryName,
+ int nDet, int nView, int offsetView,
+ int nSample, const double rot_anglen,
+ const double dFocalLengthRatio,
+ const double dCenterDetectorRatio,
+ const double dViewRatio, const double dScanRatio)
{
- m_phmLen = phm.maxAxisLength(); // maximal length along an axis
-
m_fail = false;
m_idGeometry = convertGeometryNameToID (geometryName);
if (m_idGeometry == GEOMETRY_INVALID) {
m_failMessage += geometryName;
return;
}
-
+
if (nView < 1 || nDet < 1) {
m_fail = true;
m_failMessage = "nView & nDet must be greater than 0";
}
if (nSample < 1)
m_nSample = 1;
-
+
m_nDet = nDet;
m_nView = nView;
+ m_iOffsetView = offsetView;
m_nSample = nSample;
m_dFocalLengthRatio = dFocalLengthRatio;
- m_dFieldOfViewRatio = dFieldOfViewRatio;
- m_dFocalLength = (m_phmLen * SQRT2 / 2) * dFocalLengthRatio;
- m_dFieldOfView = m_phmLen * SQRT2 * dFieldOfViewRatio;
-
+ m_dCenterDetectorRatio = dCenterDetectorRatio;
+ m_dViewRatio = dViewRatio;
+ m_dScanRatio = dScanRatio;
+
+ m_dViewDiameter = phm.getDiameterBoundaryCircle() * m_dViewRatio;
+ m_dFocalLength = (m_dViewDiameter / 2) * m_dFocalLengthRatio;
+ m_dCenterDetectorLength = (m_dViewDiameter / 2) * m_dCenterDetectorRatio;
+ m_dSourceDetectorLength = m_dFocalLength + m_dCenterDetectorLength;
+ m_dScanDiameter = m_dViewDiameter * m_dScanRatio;
+
m_dXCenter = phm.xmin() + (phm.xmax() - phm.xmin()) / 2;
m_dYCenter = phm.ymin() + (phm.ymax() - phm.ymin()) / 2;
m_rotLen = rot_anglen;
m_rotInc = m_rotLen / m_nView;
if (m_idGeometry == GEOMETRY_PARALLEL) {
- m_detLen = m_dFieldOfView;
+ m_dFanBeamAngle = 0;
+ m_detLen = m_dScanDiameter;
+ m_detStart = -m_detLen / 2;
m_detInc = m_detLen / m_nDet;
- if (m_nDet % 2 == 0) // Adjust for Even number of detectors
- m_detInc = m_detLen / (m_nDet - 1); // center detector = (nDet/2)-1
-
+ double dDetectorArrayEndOffset = 0;
+ // For even number of detectors, make detInc slightly larger so that center lies
+ // at nDet/2. Also, extend detector array by one detInc so that all of the phantom is scanned
+ if (isEven (m_nDet)) { // Adjust for Even number of detectors
+ m_detInc = m_detLen / (m_nDet - 1); // center detector = (nDet/2)
+ dDetectorArrayEndOffset = m_detInc;
+ }
+
double dHalfDetLen = m_detLen / 2;
m_initPos.xs1 = m_dXCenter - dHalfDetLen;
m_initPos.ys1 = m_dYCenter + m_dFocalLength;
- m_initPos.xs2 = m_dXCenter + dHalfDetLen;
+ m_initPos.xs2 = m_dXCenter + dHalfDetLen + dDetectorArrayEndOffset;
m_initPos.ys2 = m_dYCenter + m_dFocalLength;
m_initPos.xd1 = m_dXCenter - dHalfDetLen;
- m_initPos.yd1 = m_dYCenter - m_dFocalLength;
- m_initPos.xd2 = m_dXCenter + dHalfDetLen;
- m_initPos.yd2 = m_dYCenter - m_dFocalLength;
- m_initPos.angle = 0.0;
+ m_initPos.yd1 = m_dYCenter - m_dCenterDetectorLength;
+ m_initPos.xd2 = m_dXCenter + dHalfDetLen + dDetectorArrayEndOffset;
+ m_initPos.yd2 = m_dYCenter - m_dCenterDetectorLength;
+ m_initPos.angle = m_iOffsetView * m_rotInc;
+ m_detLen += dDetectorArrayEndOffset;
} else if (m_idGeometry == GEOMETRY_EQUILINEAR) {
-#if 0
- double dAngle = (m_dFieldOfView / 2) / cos (asin (m_dFieldOfView / 2 / m_dFocalLength));
-#else
- double dHalfSquare = m_dFieldOfView / SQRT2 / 2;
- double dFocalPastPhm = m_dFocalLength - dHalfSquare;
- if (dFocalPastPhm <= 0.) {
+ if (m_dScanDiameter / 2 >= m_dFocalLength) {
m_fail = true;
- m_failMessage = "Focal Point inside of phantom";
+ m_failMessage = "Invalid geometry: Focal length must be larger than scan length";
return;
}
- double dAngle = atan( dHalfSquare / dFocalPastPhm );
-#endif
- double dHalfDetLen = 2 * m_dFocalLength * tan (dAngle);
-
+
+ const double dAngle = asin ((m_dScanDiameter / 2) / m_dFocalLength);
+ const double dHalfDetLen = m_dSourceDetectorLength * tan (dAngle);
+
m_detLen = dHalfDetLen * 2;
+ m_detStart = -dHalfDetLen;
m_detInc = m_detLen / m_nDet;
- if (m_nDet % 2 == 0) // Adjust for Even number of detectors
- m_detInc = m_detLen / (m_nDet - 1); // center detector = (nDet/2)-1
-
- m_initPos.angle = 0.0;
+ double dDetectorArrayEndOffset = 0;
+ if (isEven (m_nDet)) { // Adjust for Even number of detectors
+ m_detInc = m_detLen / (m_nDet - 1); // center detector = (nDet/2)
+ dDetectorArrayEndOffset = m_detInc;
+ m_detLen += dDetectorArrayEndOffset;
+ }
+
+ m_dFanBeamAngle = dAngle * 2;
m_initPos.xs1 = m_dXCenter;
m_initPos.ys1 = m_dYCenter + m_dFocalLength;
m_initPos.xs2 = m_dXCenter;
m_initPos.ys2 = m_dYCenter + m_dFocalLength;
m_initPos.xd1 = m_dXCenter - dHalfDetLen;
- m_initPos.yd1 = m_dYCenter - m_dFocalLength;
- m_initPos.xd2 = m_dXCenter + dHalfDetLen;
- m_initPos.yd2 = m_dYCenter - m_dFocalLength;
- m_initPos.angle = 0.0;
+ m_initPos.yd1 = m_dYCenter - m_dCenterDetectorLength;
+ m_initPos.xd2 = m_dXCenter + dHalfDetLen + dDetectorArrayEndOffset;
+ m_initPos.yd2 = m_dYCenter - m_dCenterDetectorLength;
+ m_initPos.angle = m_iOffsetView * m_rotInc;
} else if (m_idGeometry == GEOMETRY_EQUIANGULAR) {
-#if 0
- double dAngle = atan ((m_dFieldOfView / 2) / m_dFocalLength);
-#else
- double dHalfSquare = m_dFieldOfView / SQRT2 / 2;
- double dFocalPastPhm = m_dFocalLength - dHalfSquare;
- if (dFocalPastPhm <= 0.) {
+ if (m_dScanDiameter / 2 > m_dFocalLength) {
m_fail = true;
- m_failMessage = "Focal Point inside of phantom";
+ m_failMessage = "Invalid geometry: Focal length must be larger than scan length";
return;
}
- double dAngle = atan ( dHalfSquare / dFocalPastPhm );
-#endif
+ const double dAngle = asin ((m_dScanDiameter / 2) / m_dFocalLength);
+
m_detLen = 2 * dAngle;
+ m_detStart = -dAngle;
m_detInc = m_detLen / m_nDet;
- if (m_nDet % 2 == 0) // Adjust for Even number of detectors
- m_detInc = m_detLen / (m_nDet - 1); // center detector = (nDet/2)-1
- m_dAngularDetIncrement = m_detInc * 2; // Angular Position 2x gamma angle
- m_dAngularDetLen = m_detLen * 2;
+ double dDetectorArrayEndOffset = 0;
+ if (isEven (m_nDet)) { // Adjust for Even number of detectors
+ m_detInc = m_detLen / (m_nDet - 1); // center detector = (nDet/2)
+ dDetectorArrayEndOffset = m_detInc;
+ }
+ // adjust for center-detector length
+ double dA1 = acos ((m_dScanDiameter / 2) / m_dCenterDetectorLength);
+ double dAngularScale = 2 * (HALFPI + dAngle - dA1) / m_detLen;
+
+ m_dAngularDetLen = dAngularScale * (m_detLen + dDetectorArrayEndOffset);
+ m_dAngularDetIncrement = dAngularScale * m_detInc;
m_initPos.dAngularDet = -m_dAngularDetLen / 2;
-
- m_initPos.angle = 0;
+
+ m_dFanBeamAngle = dAngle * 2;
+ m_initPos.angle = m_iOffsetView * m_rotInc;
m_initPos.xs1 = m_dXCenter;
m_initPos.ys1 = m_dYCenter + m_dFocalLength;;
m_initPos.xs2 = m_dXCenter;
m_initPos.ys2 = m_dYCenter + m_dFocalLength;
+ m_detLen += dDetectorArrayEndOffset;
}
-
- // Calculate incrementatal rotation matrix
+
+ // Calculate incrementatal rotation matrix
GRFMTX_2D temp;
xlat_mtx2 (m_rotmtxIncrement, -m_dXCenter, -m_dYCenter);
rot_mtx2 (temp, m_rotInc);
mult_mtx2 (m_rotmtxIncrement, temp, m_rotmtxIncrement);
xlat_mtx2 (temp, m_dXCenter, m_dYCenter);
mult_mtx2 (m_rotmtxIncrement, temp, m_rotmtxIncrement);
-
+
}
Scanner::~Scanner (void)
Scanner::convertGeometryIDToName (const int geomID)
{
const char *name = "";
-
+
if (geomID >= 0 && geomID < s_iGeometryCount)
return (s_aszGeometryName[geomID]);
-
+
return (name);
}
Scanner::convertGeometryIDToTitle (const int geomID)
{
const char *title = "";
-
+
if (geomID >= 0 && geomID < s_iGeometryCount)
return (s_aszGeometryName[geomID]);
-
+
return (title);
}
int
-Scanner::convertGeometryNameToID (const char* const geomName)
+Scanner::convertGeometryNameToID (const char* const geomName)
{
int id = GEOMETRY_INVALID;
-
+
for (int i = 0; i < s_iGeometryCount; i++)
if (strcasecmp (geomName, s_aszGeometryName[i]) == 0) {
id = i;
break;
}
-
+
return (id);
}
/* NAME
-* collectProjections Calculate projections for a Phantom
+* collectProjections Calculate projections for a Phantom
*
* SYNOPSIS
* collectProjections (proj, phm, start_view, nView, bStoreViewPos, trace)
* Projectrions& proj Projection storage
-* Phantom& phm Phantom for which we collect projections
+* Phantom& phm Phantom for which we collect projections
* bool bStoreViewPos TRUE then storage proj at normal view position
-* int trace Trace level
+* int trace Trace level
*/
void
Scanner::collectProjections (Projections& proj, const Phantom& phm, const int trace, SGP* pSGP)
{
- collectProjections (proj, phm, 0, proj.nView(), true, trace, pSGP);
+ collectProjections (proj, phm, m_startView, proj.nView(), m_iOffsetView, true, trace, pSGP);
}
void
-Scanner::collectProjections (Projections& proj, const Phantom& phm, const int iStartView, const int iNumViews, bool bStoreAtViewPosition, const int trace, SGP* pSGP)
+Scanner::collectProjections (Projections& proj, const Phantom& phm, const int iStartView,
+ const int iNumViews, const int iOffsetView, bool bStoreAtViewPosition,
+ const int trace, SGP* pSGP)
+{
+ int iStorageOffset = (bStoreAtViewPosition ? iStartView : 0);
+ collectProjections (proj, phm, iStartView, iNumViews, iOffsetView, iStorageOffset, trace, pSGP);
+}
+
+void
+Scanner::collectProjections (Projections& proj, const Phantom& phm, const int iStartView,
+ const int iNumViews, const int iOffsetView, int iStorageOffset,
+ const int trace, SGP* pSGP)
{
m_trace = trace;
- double start_angle = iStartView * proj.rotInc();
-
- // Calculate initial rotation matrix
+ double start_angle = (iStartView + iOffsetView) * proj.rotInc();
+
+ // Calculate initial rotation matrix
GRFMTX_2D rotmtx_initial, temp;
xlat_mtx2 (rotmtx_initial, -m_dXCenter, -m_dYCenter);
rot_mtx2 (temp, start_angle);
mult_mtx2 (rotmtx_initial, temp, rotmtx_initial);
xlat_mtx2 (temp, m_dXCenter, m_dYCenter);
mult_mtx2 (rotmtx_initial, temp, rotmtx_initial);
-
+
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
+ xform_mtx2 (rotmtx_initial, xd1, yd1); // rotate detector endpoints
+ xform_mtx2 (rotmtx_initial, xd2, yd2); // to initial view_angle
}
-
+
double xs1 = m_initPos.xs1;
double ys1 = m_initPos.ys1;
double xs2 = m_initPos.xs2;
double ys2 = m_initPos.ys2;
xform_mtx2 (rotmtx_initial, xs1, ys1); // rotate source endpoints to
xform_mtx2 (rotmtx_initial, xs2, ys2); // initial view angle
-
+
int iView;
double viewAngle;
for (iView = 0, viewAngle = start_angle; iView < iNumViews; iView++, viewAngle += proj.rotInc()) {
- int iStoragePosition = iView;
- if (bStoreAtViewPosition)
- iStoragePosition += iStartView;
-
+ int iStoragePosition = iView + iStorageOffset;
+
DetectorArray& detArray = proj.getDetectorArray( iStoragePosition );
-
-#ifdef HAVE_SGP
+
+#ifdef HAVE_SGP
if (pSGP && m_trace >= Trace::TRACE_PHANTOM) {
m_pSGP = pSGP;
- double dWindowSize = dmax (m_detLen, m_dFocalLength * 2) * SQRT2;
+ double dWindowSize = dmax (m_detLen, m_dSourceDetectorLength) * 2;
double dHalfWindowSize = dWindowSize / 2;
m_dXMinWin = m_dXCenter - dHalfWindowSize;
m_dXMaxWin = m_dXCenter + dHalfWindowSize;
m_dYMinWin = m_dYCenter - dHalfWindowSize;
m_dYMaxWin = m_dYCenter + dHalfWindowSize;
- double dHalfPhmLen = m_phmLen / 2;
-
+
m_pSGP->setWindow (m_dXMinWin, m_dYMinWin, m_dXMaxWin, m_dYMaxWin);
m_pSGP->setRasterOp (RO_COPY);
+
m_pSGP->setColor (C_RED);
m_pSGP->moveAbs (0., 0.);
- m_pSGP->drawRect (m_dXCenter - dHalfPhmLen, m_dYCenter - dHalfPhmLen, m_dXCenter + dHalfPhmLen, m_dYCenter + dHalfPhmLen);
+ m_pSGP->drawCircle (m_dViewDiameter / 2);
+
m_pSGP->moveAbs (0., 0.);
+ m_pSGP->setColor (C_GREEN);
m_pSGP->drawCircle (m_dFocalLength);
m_pSGP->setColor (C_BLUE);
+#if MSVC
+ m_pSGP->setTextPointSize (9);
+#else
+ m_pSGP->setTextPointSize (14);
+#endif
phm.draw (*m_pSGP);
m_dTextHeight = m_pSGP->getCharHeight ();
-
+
traceShowParam ("Phantom:", "%s", PROJECTION_TRACE_ROW_PHANT_ID, C_BLACK, phm.name().c_str());
traceShowParam ("Geometry:", "%s", PROJECTION_TRACE_ROW_GEOMETRY, C_BLUE, convertGeometryIDToName(m_idGeometry));
traceShowParam ("Focal Length Ratio:", "%.2f", PROJECTION_TRACE_ROW_FOCAL_LENGTH, C_BLUE, m_dFocalLengthRatio);
- traceShowParam ("Field Of View Ratio:", "%.2f", PROJECTION_TRACE_ROW_FIELD_OF_VIEW, C_BLUE, m_dFieldOfViewRatio);
+ // traceShowParam ("Field Of View Ratio:", "%.2f", PROJECTION_TRACE_ROW_FIELD_OF_VIEW, C_BLUE, m_dFieldOfViewRatio);
traceShowParam ("Num Detectors:", "%d", PROJECTION_TRACE_ROW_NDET, C_BLUE, proj.nDet());
traceShowParam ("Num Views:", "%d", PROJECTION_TRACE_ROW_NVIEW, C_BLUE, proj.nView());
traceShowParam ("Samples / Ray:", "%d", PROJECTION_TRACE_ROW_SAMPLES, C_BLUE, m_nSample);
-
- m_pSGP->setMarker (SGP::MARK_BDIAMOND, C_LTGREEN);
+
+ m_pSGP->setMarker (SGP::MARKER_BDIAMOND);
}
#endif
-
+
#ifdef HAVE_SGP
if (m_pSGP && m_trace >= Trace::TRACE_PHANTOM) {
m_pSGP->setColor (C_BLACK);
m_pSGP->lineAbs (xs2, ys2);
m_pSGP->moveAbs (xd1, yd1);
m_pSGP->lineAbs (xd2, yd2);
- } else if (m_idGeometry == GEOMETRY_EQUILINEAR) {
+ } else if (m_idGeometry == GEOMETRY_EQUILINEAR) {
m_pSGP->setPenWidth (4);
m_pSGP->moveAbs (xs1, ys1);
m_pSGP->lineAbs (xs2, ys2);
m_pSGP->lineAbs (xs2, ys2);
m_pSGP->setPenWidth (2);
m_pSGP->moveAbs (0., 0.);
- m_pSGP->drawArc (m_dFocalLength, viewAngle + 3 * HALFPI - (m_dAngularDetLen/2), viewAngle + 3 * HALFPI + (m_dAngularDetLen/2));
+ m_pSGP->drawArc (m_dCenterDetectorLength, viewAngle + 3 * HALFPI - (m_dAngularDetLen/2), viewAngle + 3 * HALFPI + (m_dAngularDetLen/2));
}
m_pSGP->setPenWidth (1);
}
#endif
if (m_trace == Trace::TRACE_CONSOLE)
std::cout << "Current View: " << iView+iStartView << std::endl;
-
+
projectSingleView (phm, detArray, xd1, yd1, xd2, yd2, xs1, ys1, xs2, ys2, viewAngle + 3 * HALFPI);
detArray.setViewAngle (viewAngle);
-
+
#ifdef HAVE_SGP
if (m_pSGP && m_trace >= Trace::TRACE_PHANTOM) {
- // rs_plot (detArray, xd1, yd1, dXCenter, dYCenter, theta);
+ // rs_plot (detArray, xd1, yd1, dXCenter, dYCenter, theta);
}
#endif
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, xd1, yd1); // rotate detector endpoints
xform_mtx2 (m_rotmtxIncrement, xd2, yd2);
}
} /* for each iView */
/* NAME
-* rayview Calculate raysums for a view at any angle
+* rayview Calculate raysums for a view at any angle
*
* SYNOPSIS
* rayview (phm, detArray, xd1, nSample, yd1, xd2, yd2, xs1, ys1, xs2, ys2)
-* Phantom& phm Phantom to scan
-* DETARRAY *detArray Storage of values for detector array
-* Scanner& det Scanner parameters
-* double xd1, yd1, xd2, yd2 Beginning & ending detector positions
-* double xs1, ys1, xs2, ys2 Beginning & ending source positions
+* Phantom& phm Phantom to scan
+* DETARRAY *detArray Storage of values for detector array
+* Scanner& det Scanner parameters
+* double xd1, yd1, xd2, yd2 Beginning & ending detector positions
+* double xs1, ys1, xs2, ys2 Beginning & ending source positions
*
* RAY POSITIONING
* For each detector, have there are a variable number of rays traced.
* In that case, the detector position is the center of the detector cell.
*/
-void
+void
Scanner::projectSingleView (const Phantom& phm, DetectorArray& detArray, const double xd1, const double yd1, const double xd2, const double yd2, const double xs1, const double ys1, const double xs2, const double ys2, const double dDetAngle)
{
-
- double sdx = (xs2 - xs1) / detArray.nDet(); // change in coords
+
+ double sdx = (xs2 - xs1) / detArray.nDet(); // change in coords
double sdy = (ys2 - ys1) / detArray.nDet(); // between source
- double xs_maj = xs1 + (sdx / 2); // put ray source in center of cell
+ double xs_maj = xs1 + (sdx / 2); // put ray source in center of cell
double ys_maj = ys1 + (sdy / 2);
-
+
double ddx=0, ddy=0, ddx2=0, ddy2=0, ddx2_ofs=0, ddy2_ofs=0, xd_maj=0, yd_maj=0;
double dAngleInc=0, dAngleSampleInc=0, dAngleSampleOffset=0, dAngleMajor=0;
if (m_idGeometry == GEOMETRY_EQUIANGULAR) {
dAngleSampleOffset = dAngleSampleInc / 2;
dAngleMajor = dDetAngle - (m_dAngularDetLen/2) + dAngleSampleOffset;
} else {
- ddx = (xd2 - xd1) / detArray.nDet(); // change in coords
+ ddx = (xd2 - xd1) / detArray.nDet(); // change in coords
ddy = (yd2 - yd1) / detArray.nDet(); // between detectors
- ddx2 = ddx / m_nSample; // Incr. between rays with detector cell
- ddy2 = ddy / m_nSample; // Doesn't include detector endpoints
+ ddx2 = ddx / m_nSample; // Incr. between rays with detector cell
+ ddy2 = ddy / m_nSample; // Doesn't include detector endpoints
ddx2_ofs = ddx2 / 2; // offset of 1st ray from start of detector cell
ddy2_ofs = ddy2 / 2;
-
+
xd_maj = xd1 + ddx2_ofs; // Incr. between detector cells
yd_maj = yd1 + ddy2_ofs;
}
-
+
DetectorValue* detval = detArray.detValues();
-
+
if (phm.getComposition() == P_UNIT_PULSE) { // put unit pulse in center of view
for (int d = 0; d < detArray.nDet(); d++)
- if (detArray.nDet() / 2 == d && (d % 2) == 1)
- detval[d] = 1;
- else
detval[d] = 0;
+ detval[ detArray.nDet() / 2 ] = 1;
} else {
for (int d = 0; d < detArray.nDet(); d++) {
double xs = xs_maj;
double sum = 0.0;
for (unsigned int i = 0; i < m_nSample; i++) {
if (m_idGeometry == GEOMETRY_EQUIANGULAR) {
- xd = m_dFocalLength * cos (dAngle);
- yd = m_dFocalLength * sin (dAngle);
+ xd = m_dCenterDetectorLength * cos (dAngle);
+ yd = m_dCenterDetectorLength * sin (dAngle);
}
-
+
#ifdef HAVE_SGP
if (m_pSGP && m_trace >= Trace::TRACE_PROJECTIONS) {
m_pSGP->setColor (C_YELLOW);
m_pSGP->lineAbs (xd, yd);
}
#endif
-
+
sum += projectSingleLine (phm, xd, yd, xs, ys);
-
+
#ifdef HAVE_SGP
- // if (m_trace >= Trace::TRACE_CLIPPING) {
- // traceShowParam ("Attenuation:", "%s", PROJECTION_TRACE_ROW_ATTEN, C_LTMAGENTA, " ");
- // traceShowParam ("Attenuation:", "%.3f", PROJECTION_TRACE_ROW_ATTEN, C_LTMAGENTA, sum);
- // }
+ // if (m_trace >= Trace::TRACE_CLIPPING) {
+ // traceShowParam ("Attenuation:", "%s", PROJECTION_TRACE_ROW_ATTEN, C_LTMAGENTA, " ");
+ // traceShowParam ("Attenuation:", "%.3f", PROJECTION_TRACE_ROW_ATTEN, C_LTMAGENTA, sum);
+ // }
#endif
if (m_idGeometry == GEOMETRY_EQUIANGULAR)
dAngle += dAngleSampleInc;
yd += ddy2;
}
} // for each sample in detector
-
+
detval[d] = sum / m_nSample;
xs_maj += sdx;
ys_maj += sdy;
}
-void
+void
Scanner::traceShowParam (const char *szLabel, const char *fmt, int row, int color, ...)
-{
+{
va_list arg;
va_start(arg, color);
#ifdef HAVE_SGP
traceShowParamRasterOp (RO_COPY, szLabel, fmt, row, color, arg);
#else
traceShowParamRasterOp (0, szLabel, fmt, row, color, arg);
-#endif
+#endif
va_end(arg);
}
-void
+void
Scanner::traceShowParamXOR (const char *szLabel, const char *fmt, int row, int color, ...)
-{
+{
va_list arg;
va_start(arg, color);
#ifdef HAVE_SGP
va_end(arg);
}
-void
+void
Scanner::traceShowParamRasterOp (int iRasterOp, const char *szLabel, const char *fmt, int row, int color, va_list args)
-{
+{
char szValue[256];
-
+
vsnprintf (szValue, sizeof(szValue), fmt, args);
-
+
#ifdef HAVE_SGP
if (m_pSGP) {
m_pSGP->setRasterOp (iRasterOp);
- double dYPos = m_dYMaxWin - (row * m_dTextHeight);
- m_pSGP->moveAbs (m_dXMinWin, dYPos);
m_pSGP->setTextColor (color, -1);
- m_pSGP->drawText (szLabel);
double dValueOffset = (m_dXMaxWin - m_dXMinWin) / 4;
- m_pSGP->moveAbs (m_dXMinWin + dValueOffset, dYPos);
- m_pSGP->drawText (szValue);
- } else
+ if (row < 4) {
+ double dYPos = m_dYMaxWin - (row * m_dTextHeight);
+ double dXPos = m_dXMinWin;
+ m_pSGP->moveAbs (dXPos, dYPos);
+ m_pSGP->drawText (szLabel);
+ m_pSGP->moveAbs (dXPos + dValueOffset, dYPos);
+ m_pSGP->drawText (szValue);
+ } else {
+ row -= 4;
+ double dYPos = m_dYMaxWin - (row * m_dTextHeight);
+ double dXPos = m_dXMinWin + (m_dXMaxWin - m_dXMinWin) * 0.5;
+ m_pSGP->moveAbs (dXPos, dYPos);
+ m_pSGP->drawText (szLabel);
+ m_pSGP->moveAbs (dXPos + dValueOffset, dYPos);
+ m_pSGP->drawText (szValue);
+ }
+ } else
#endif
{
cio_put_str (szLabel);
/* NAME
-* projectSingleLine INTERNAL: Calculates raysum along a line for a Phantom
+* projectSingleLine INTERNAL: Calculates raysum along a line for a Phantom
*
* SYNOPSIS
* rsum = phm_ray_attenuation (phm, x1, y1, x2, y2)
-* double rsum Ray sum of Phantom along given line
-* Phantom& phm; Phantom from which to calculate raysum
-* double *x1, *y1, *x2, y2 Endpoints of ray path (in Phantom coords)
+* double rsum Ray sum of Phantom along given line
+* Phantom& phm; Phantom from which to calculate raysum
+* double *x1, *y1, *x2, y2 Endpoints of ray path (in Phantom coords)
*/
-double
+double
Scanner::projectSingleLine (const Phantom& phm, const double x1, const double y1, const double x2, const double y2)
{
- // check ray against each pelem in Phantom
+ // 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);
-
+
return (rsum);
}
/* NAME
-* pelem_ray_attenuation Calculate raysum of an pelem along one line
+* pelem_ray_attenuation Calculate raysum of an pelem along one line
*
* SYNOPSIS
* rsum = pelem_ray_attenuation (pelem, x1, y1, x2, y2)
-* double rsum Computed raysum
-* PhantomElement& pelem Pelem to scan
-* double x1, y1, x2, y2 Endpoints of raysum line
+* double rsum Computed raysum
+* PhantomElement& pelem Pelem to scan
+* double x1, y1, x2, y2 Endpoints of raysum line
*/
-double
+double
Scanner::projectLineAgainstPElem (const PhantomElement& pelem, double x1, double y1, double x2, double y2)
{
if (! pelem.clipLineWorldCoords (x1, y1, x2, y2)) {
cio_tone (1000., 0.05);
return (0.0);
}
-
+
#ifdef HAVE_SGP
if (m_pSGP && m_trace == Trace::TRACE_CLIPPING) {
m_pSGP->setRasterOp (RO_XOR);
m_pSGP->setRasterOp (RO_SET);
}
#endif
-
+
double len = lineLength (x1, y1, x2, y2);
return (len * pelem.atten());
}
projects / ctsim.git / blobdiff