** This is part of the CTSim program
** Copyright (c) 1983-2001 Kevin Rosenberg
**
-** $Id: phantom.cpp,v 1.29 2001/02/09 14:34:16 kevin Exp $
+** $Id: phantom.cpp,v 1.30 2001/02/27 03:59:30 kevin Exp $
**
** 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
Phantom::convertPhantomIDToName (int phmID)
{
static const char *name = "";
-
+
if (phmID >= 0 && phmID < s_iPhantomCount)
- return (s_aszPhantomName[phmID]);
-
+ return (s_aszPhantomName[phmID]);
+
return (name);
}
Phantom::convertPhantomIDToTitle (int phmID)
{
static const char *title = "";
-
+
if (phmID >= 0 && phmID < s_iPhantomCount)
- return (s_aszPhantomName[phmID]);
-
+ return (s_aszPhantomName[phmID]);
+
return (title);
}
-
+
int
Phantom::convertNameToPhantomID (const char* const phmName)
{
int id = PHM_INVALID;
-
+
for (int i = 0; i < s_iPhantomCount; i++)
- if (strcasecmp (phmName, s_aszPhantomName[i]) == 0) {
- id = i;
- break;
- }
-
- return (id);
+ if (strcasecmp (phmName, s_aszPhantomName[i]) == 0) {
+ id = i;
+ break;
+ }
+
+ return (id);
}
-
+
bool
Phantom::createFromPhantom (const char* const phmName)
m_failMessage += phmName;
return false;
}
-
+
m_name = phmName;
createFromPhantom (phmid);
return true;
Phantom::createFromPhantom (const int phmid)
{
switch (phmid)
- {
- case PHM_HERMAN:
- addStdHerman();
- break;
- case PHM_SHEPP_LOGAN:
- addStdSheppLogan();
- break;
- case PHM_UNITPULSE:
- m_composition = P_UNIT_PULSE;
- addPElem ("rectangle", 0., 0., 100., 100., 0., 0.); // outline
- addPElem ("ellipse", 0., 0., 1., 1., 0., 1.); // pulse
- break;
- default:
- m_fail = true;
- m_failMessage = "Illegal phantom id ";
- m_failMessage += phmid;
- return false;
- }
-
+ {
+ case PHM_HERMAN:
+ addStdHerman();
+ break;
+ case PHM_SHEPP_LOGAN:
+ addStdSheppLogan();
+ break;
+ case PHM_UNITPULSE:
+ m_composition = P_UNIT_PULSE;
+ addPElem ("rectangle", 0., 0., 100., 100., 0., 0.); // outline
+ addPElem ("ellipse", 0., 0., 1., 1., 0., 1.); // pulse
+ break;
+ default:
+ m_fail = true;
+ m_failMessage = "Illegal phantom id ";
+ m_failMessage += phmid;
+ return false;
+ }
+
m_id = phmid;
-
+
return true;
}
/* METHOD IDENTIFICATION
- * createFromFile Add PhantomElements from file
- *
- * SYNOPSIS
- * createFromFile (filename)
- *
- * RETURNS
- * true if pelem were added
- * false if an pelem not added
- */
+* createFromFile Add PhantomElements from file
+*
+* SYNOPSIS
+* createFromFile (filename)
+*
+* RETURNS
+* true if pelem were added
+* false if an pelem not added
+*/
bool
Phantom::createFromFile (const char* const fname)
{
bool bGoodFile = true;
FILE *fp;
-
+
if ((fp = fopen (fname, "r")) == NULL)
return (false);
-
+
m_name = fname;
-
+
while (1) {
double cx, cy, u, v, rot, dens;
char pelemtype[80];
-
+
int status = fscanf (fp, "%79s %lf %lf %lf %lf %lf %lf", pelemtype, &cx, &cy, &u, &v, &rot, &dens);
if (status == static_cast<int>(EOF))
}
fclose (fp);
-
+
return (bGoodFile);
}
Phantom::fileWrite (const char* const fname)
{
fstream file (fname, ios::out);
-
+
if (! file.fail())
printDefinitions (file);
return ! file.fail();
}
/* NAME
- * addPElem Add pelem
- *
- * SYNOPSIS
- * addPElem (type, cx, cy, u, v, rot, atten)
- * char *type type of pelem (box, ellipse, etc)
- * double cx, cy pelem center
- * double u,v pelem size
- * double rot rotation angle of pelem (in degrees)
- * double atten x-ray attenuation cooefficient
- */
+* addPElem Add pelem
+*
+* SYNOPSIS
+* addPElem (type, cx, cy, u, v, rot, atten)
+* char *type type of pelem (box, ellipse, etc)
+* double cx, cy pelem center
+* double u,v pelem size
+* double rot rotation angle of pelem (in degrees)
+* double atten x-ray attenuation cooefficient
+*/
void
Phantom::addPElem (const char *type, const double cx, const double cy, const double u, const double v, const double rot, const double atten)
{
PhantomElement *pelem = new PhantomElement (type, cx, cy, u, v, rot, atten);
-
+
m_listPElem.push_front (pelem);
-
+
// update phantom limits
if (m_xmin > pelem->xmin()) m_xmin = pelem->xmin();
if (m_xmax < pelem->xmax()) m_xmax = pelem->xmax();
if (m_ymin > pelem->ymin()) m_ymin = pelem->ymin();
if (m_ymax < pelem->ymax()) m_ymax = pelem->ymax();
-
+
m_nPElem++;
}
/* NAME
- * print Print vertices of Phantom pelems
- *
- * SYNOPSIS
- * print (phm)
- */
+* print Print vertices of Phantom pelems
+*
+* SYNOPSIS
+* print (phm)
+*/
void
Phantom::print (std::ostream& os) const
for (PElemConstIterator i = m_listPElem.begin(); i != m_listPElem.end(); i++) {
const PhantomElement& rPE = **i;
- os << "PhantomElement: nPoints=" << rPE.nOutlinePoints();
- os << ", atten=" << rPE.atten() << " rot=" << convertRadiansToDegrees (rPE.rot()) << "\n";
- os << "xmin=" << rPE.xmin() << ", ymin=" << rPE.ymin() << ", xmax=" << rPE.xmax() << ", ymax=" << rPE.ymax() << "\n";
+ os << "PhantomElement: nPoints=" << rPE.nOutlinePoints();
+ os << ", atten=" << rPE.atten() << " rot=" << convertRadiansToDegrees (rPE.rot()) << "\n";
+ os << "xmin=" << rPE.xmin() << ", ymin=" << rPE.ymin() << ", xmax=" << rPE.xmax() << ", ymax=" << rPE.ymax() << "\n";
- if (false)
- for (int i = 0; i < rPE.nOutlinePoints(); i++)
- os << rPE.xOutline()[i] << "," << rPE.yOutline()[i] << "\n";
+ if (false)
+ for (int i = 0; i < rPE.nOutlinePoints(); i++)
+ os << rPE.xOutline()[i] << "," << rPE.yOutline()[i] << "\n";
}
}
void
for (PElemConstIterator i = m_listPElem.begin(); i != m_listPElem.end(); i++) {
const PhantomElement& rPE = **i;
- os << "PhantomElement: nPoints=" << rPE.nOutlinePoints();
- os << ", atten=" << rPE.atten() << " rot=" << convertRadiansToDegrees (rPE.rot()) << "\n";
- os << "xmin=" << rPE.xmin() << ", ymin=" << rPE.ymin() << ", xmax=" << rPE.xmax() << ", ymax=" << rPE.ymax() << "\n";
+ os << "PhantomElement: nPoints=" << rPE.nOutlinePoints();
+ os << ", atten=" << rPE.atten() << " rot=" << convertRadiansToDegrees (rPE.rot()) << "\n";
+ os << "xmin=" << rPE.xmin() << ", ymin=" << rPE.ymin() << ", xmax=" << rPE.xmax() << ", ymax=" << rPE.ymax() << "\n";
- if (false)
- for (int i = 0; i < rPE.nOutlinePoints(); i++)
- os << rPE.xOutline()[i] << "," << rPE.yOutline()[i] << "\n";
+ if (false)
+ for (int i = 0; i < rPE.nOutlinePoints(); i++)
+ os << rPE.xOutline()[i] << "," << rPE.yOutline()[i] << "\n";
}
}
/* NAME
- * show Show vector outline of Phantom to user
- *
- * SYNOPSIS
- * show (pic)
- */
+* show Show vector outline of Phantom to user
+*
+* SYNOPSIS
+* show (pic)
+*/
#ifdef HAVE_SGP
void
{
SGPDriver driverSGP ("Phantom Show");
SGP sgp (driverSGP);
-
+
show (sgp);
-
+
std::cout << "Press return to continue";
cio_kb_getc();
}
{
double wsize = m_xmax - m_xmin;
if ((m_ymax - m_ymin) > wsize)
- wsize = m_ymax - m_ymin;
+ wsize = m_ymax - m_ymin;
wsize *= 1.01;
double halfWindow = wsize / 2;
-
+
double xcent = m_xmin + (m_xmax - m_xmin) / 2;
double ycent = m_ymin + (m_ymax - m_ymin) / 2;
-
+
sgp.setWindow (xcent - halfWindow, ycent - halfWindow, xcent + halfWindow, ycent + halfWindow);
-
+
draw (sgp);
}
#endif
/* NAME
- * draw Draw vector outline of Phantom
- *
- * SYNOPSIS
- * draw ()
- */
+* draw Draw vector outline of Phantom
+*
+* SYNOPSIS
+* draw ()
+*/
#ifdef HAVE_SGP
void
/* NAME
- * addStdSheppLogan Make head phantom of Shepp-Logan
- *
- * REFERENCES
- * S. W. Rowland, "Computer Implementation of Image Reconstruction
- * Formulas", in "Image Reconstruction from Projections: Implementation
- * and Applications", edited by G. T. Herman, 1978.
- */
+* addStdSheppLogan Make head phantom of Shepp-Logan
+*
+* REFERENCES
+* S. W. Rowland, "Computer Implementation of Image Reconstruction
+* Formulas", in "Image Reconstruction from Projections: Implementation
+* and Applications", edited by G. T. Herman, 1978.
+*/
void
Phantom::addStdSheppLogan ()
/* NAME
- * addStdHerman Standard head phantom of G. T. Herman
- *
- * REFERENCES
- * G. T. Herman, "Image Reconstructions from Projections: The Fundementals
- * of Computed Tomography", 1979.
- */
+* addStdHerman Standard head phantom of G. T. Herman
+*
+* REFERENCES
+* G. T. Herman, "Image Reconstructions from Projections: The Fundementals
+* of Computed Tomography", 1979.
+*/
void
Phantom::addStdHerman ()
/* NAME
- * convertToImagefile Make image array from Phantom
- *
- * SYNOPSIS
- * pic_to_imagefile (pic, im, nsample)
- * Phantom& pic Phantom definitions
- * ImageFile *im Computed pixel array
- * int nsample Number of samples along each axis for each pixel
- * (total samples per pixel = nsample * nsample)
- */
+* convertToImagefile Make image array from Phantom
+*
+* SYNOPSIS
+* pic_to_imagefile (pic, im, nsample)
+* Phantom& pic Phantom definitions
+* ImageFile *im Computed pixel array
+* int nsample Number of samples along each axis for each pixel
+* (total samples per pixel = nsample * nsample)
+*/
void
Phantom::convertToImagefile (ImageFile& im, double dViewRatio, const int in_nsample, const int trace) const
}
void
-Phantom::convertToImagefile (ImageFile& im, const double dViewRatio, const int in_nsample, const int trace, const int colStart, const int colCount, bool bStoreAtColumnPos) const
+Phantom::convertToImagefile (ImageFile& im, const double dViewRatio, const int in_nsample, const int trace,
+ const int colStart, const int colCount, bool bStoreAtColumnPos) const
{
- int nx = im.nx();
- int ny = im.ny();
- if (nx < 2 || ny < 2)
- return;
+ int iStorageOffset = (bStoreAtColumnPos ? colStart : 0);
+ convertToImagefile (im, im.nx(), dViewRatio, in_nsample, trace, colStart, colCount, iStorageOffset);
+}
+void
+Phantom::convertToImagefile (ImageFile& im, const int iTotalRasterCols, const double dViewRatio,
+ const int in_nsample, const int trace, const int colStart, const int colCount, int iStorageOffset) const
+{
+ const int nx = im.nx();
+ const int ny = im.ny();
+ if (nx < 2 || ny < 2)
+ return;
+
int nsample = in_nsample;
if (nsample < 1)
nsample = 1;
-
+
double dx = m_xmax - m_xmin;
double dy = m_ymax - m_ymin;
double xcent = m_xmin + dx / 2;
double ycent = m_ymin + dy / 2;
double dHalflen = dViewRatio * (getDiameterBoundaryCircle() / SQRT2 / 2);
-
+
double xmin = xcent - dHalflen;
double xmax = xcent + dHalflen;
double ymin = ycent - dHalflen;
double ymax = ycent + dHalflen;
-
+
// Each pixel holds the average of the intensity of the cell with (ix,iy) at the center of the pixel
// Set major increments so that the last cell v[nx-1][ny-1] will start at xmax - xinc, ymax - yinc).
// Set minor increments so that sample points are centered in cell
-
- double xinc = (xmax - xmin) / nx;
+
+ double xinc = (xmax - xmin) / (iTotalRasterCols);
double yinc = (ymax - ymin) / ny;
-
+
double kxinc = xinc / nsample; /* interval between samples */
double kyinc = yinc / nsample;
double kxofs = kxinc / 2; /* offset of 1st point */
double kyofs = kyinc / 2;
-
+
im.setAxisExtent (xmin, xmax, ymin, ymax);
im.setAxisIncrement (xinc, yinc);
-
+
ImageFileArray v = im.getArray();
-
- for (int ix = 0; ix < colCount; ix++)
- for (int iy = 0; iy < ny; iy++) {
- int iColStore = ix;
- if (bStoreAtColumnPos)
- iColStore += colStart;
- v[iColStore][iy] = 0;
- }
-
+
+ for (int ix = 0; ix < colCount; ix++) {
+ int iColStore = ix + iStorageOffset;
+ ImageFileColumn vCol = v[iColStore];
+ for (int iy = 0; iy < ny; iy++)
+ *vCol++ = 0;
+ }
+
double x_start = xmin + (colStart * xinc);
for (PElemConstIterator pelem = m_listPElem.begin(); pelem != m_listPElem.end(); pelem++) {
- const PhantomElement& rPElem = **pelem;
- double x, y, xi, yi;
- int ix, iy, kx, ky;
- for (ix = 0, x = x_start; ix < colCount; ix++, x += xinc) {
- int iColStore = ix;
- if (bStoreAtColumnPos)
- iColStore += colStart;
- for (iy = 0, y = ymin; iy < ny; iy++, y += yinc) {
- for (kx = 0, xi = x + kxofs; kx < nsample; kx++, xi += kxinc) {
- for (ky = 0, yi = y + kyofs; ky < nsample; ky++, yi += kyinc)
- if (rPElem.isPointInside (xi, yi, PHM_COORD) == TRUE)
- v[iColStore][iy] += rPElem.atten();
- } // for kx
- } /* for iy */
- } /* for ix */
+ const PhantomElement& rPElem = **pelem;
+ double x, y, xi, yi;
+ int ix, iy, kx, ky;
+ for (ix = 0, x = x_start; ix < colCount; ix++, x += xinc) {
+ int iColStore = ix + iStorageOffset;
+ ImageFileColumn vCol = v[iColStore];
+ for (iy = 0, y = ymin; iy < ny; iy++, y += yinc) {
+ double dAtten = 0;
+ for (kx = 0, xi = x + kxofs; kx < nsample; kx++, xi += kxinc) {
+ for (ky = 0, yi = y + kyofs; ky < nsample; ky++, yi += kyinc)
+ if (rPElem.isPointInside (xi, yi, PHM_COORD))
+ dAtten += rPElem.atten();
+ } // for kx
+ *vCol++ += dAtten;
+ } /* for iy */
+ } /* for ix */
} /* for pelem */
-
+
if (nsample > 1) {
double factor = 1.0 / static_cast<double>(nsample * nsample);
-
-
+
+
for (int ix = 0; ix < colCount; ix++) {
- int iColStore = ix;
- if (bStoreAtColumnPos)
- iColStore += colStart;
- for (int iy = 0; iy < ny; iy++)
- v[iColStore][iy] *= factor;
- }
+ int iColStore = ix + iStorageOffset;
+ ImageFileColumn vCol = v[iColStore];
+ for (int iy = 0; iy < ny; iy++)
+ *vCol++ *= factor;
+ }
}
}
PhantomElement::PhantomElement (const char *type, const double cx, const double cy, const double u, const double v, const double rot, const double atten)
- : m_cx(cx), m_cy(cy), m_u(u), m_v(v), m_atten(atten), m_nPoints(0), m_xOutline(0), m_yOutline(0)
+: m_cx(cx), m_cy(cy), m_u(u), m_v(v), m_atten(atten), m_nPoints(0), m_xOutline(0), m_yOutline(0)
{
m_rot = convertDegreesToRadians (rot); // convert angle to radians
-
+
m_type = convertNameToType (type);
-
+
makeTransformMatrices (); // calc transform matrices between phantom and normalized phantomelement
makeVectorOutline (); // calculate vector outline of pelem
-
+
m_rectLimits[0] = m_xmin; m_rectLimits[1] = m_ymin;
m_rectLimits[2] = m_xmax; m_rectLimits[3] = m_ymax;
}
PhantomElement::~PhantomElement ()
{
- delete m_xOutline;
- delete m_yOutline;
+ delete m_xOutline;
+ delete m_yOutline;
}
void
PhmElemType
PhantomElement::convertNameToType (const char* const typeName)
{
- PhmElemType type = PELEM_INVALID;
-
- if (strcasecmp (typeName, "rectangle") == 0)
- type = PELEM_RECTANGLE;
- else if (strcasecmp (typeName, "triangle") == 0)
- type = PELEM_TRIANGLE;
- else if (strcasecmp (typeName, "ellipse") == 0)
- type = PELEM_ELLIPSE;
- else if (strcasecmp (typeName, "sector") == 0)
- type = PELEM_SECTOR;
- else if (strcasecmp (typeName, "segment") == 0)
- type = PELEM_SEGMENT;
- else
- sys_error (ERR_WARNING, "Unknown PhantomElement type %s [PhantomElement::PhantomElement]", type);
-
- return (type);
+ PhmElemType type = PELEM_INVALID;
+
+ if (strcasecmp (typeName, "rectangle") == 0)
+ type = PELEM_RECTANGLE;
+ else if (strcasecmp (typeName, "triangle") == 0)
+ type = PELEM_TRIANGLE;
+ else if (strcasecmp (typeName, "ellipse") == 0)
+ type = PELEM_ELLIPSE;
+ else if (strcasecmp (typeName, "sector") == 0)
+ type = PELEM_SECTOR;
+ else if (strcasecmp (typeName, "segment") == 0)
+ type = PELEM_SEGMENT;
+ else
+ sys_error (ERR_WARNING, "Unknown PhantomElement type %s [PhantomElement::PhantomElement]", type);
+
+ return (type);
}
const char* const
PhantomElement::convertTypeToName (PhmElemType iType)
{
static char* pszType = "Unknown";
-
+
if (iType == PELEM_RECTANGLE)
pszType = "rectangle";
else if (iType == PELEM_TRIANGLE)
pszType = "sector";
else if (iType == PELEM_SEGMENT)
pszType = "segment";
-
+
return pszType;
}
PhantomElement::makeTransformMatrices ()
{
GRFMTX_2D temp;
-
+
// To map normalized Pelem coords to world Phantom
// scale by (u, v)
// rotate by rot
// translate by (cx, cy)
-
+
scale_mtx2 (m_xformObjToPhm, m_u, m_v);
rot_mtx2 (temp, m_rot);
mult_mtx2 (m_xformObjToPhm, temp, m_xformObjToPhm);
xlat_mtx2 (temp, m_cx, m_cy);
mult_mtx2 (m_xformObjToPhm, temp, m_xformObjToPhm);
-
+
// to map world Phantom coodinates to normalized PElem coords
// translate by (-cx, -cy)
// rotate by -rot
// scale by (1/u, 1/v)
-
+
xlat_mtx2 (m_xformPhmToObj, -m_cx, -m_cy);
rot_mtx2 (temp, -m_rot);
mult_mtx2 (m_xformPhmToObj, temp, m_xformPhmToObj);
/* NAME
- * pelem_make_points INTERNAL routine to calculate point array for an pelem
- *
- * SYNOPSIS
- * makepelempts (pelem)
- * PELEM *pelem pelem whose points we are calculating
- *
- * NOTES
- * Called by phm_add_pelem()
- */
+* pelem_make_points INTERNAL routine to calculate point array for an pelem
+*
+* SYNOPSIS
+* makepelempts (pelem)
+* PELEM *pelem pelem whose points we are calculating
+*
+* NOTES
+* Called by phm_add_pelem()
+*/
void
PhantomElement::makeVectorOutline ()
double radius, theta, start, stop;
double xfact, yfact;
int cpts;
-
+
m_nPoints = 0;
switch (m_type) {
case PELEM_RECTANGLE:
// increase pelem extent by SCALE_PELEM_EXTENT to eliminate chance of
// missing actual pelem maximum due to polygonal sampling
-
+
xfact = (m_xmax - m_xmin) * SCALE_PELEM_EXTENT;
yfact = (m_ymax - m_ymin) * SCALE_PELEM_EXTENT;
-
+
m_xmin -= xfact;
m_ymin -= yfact;
m_xmax += xfact;
/* NAME
- * calc_arc Calculate outline of a arc of a circle
- *
- * SYNOPSIS
- * calc_arc (x, y, xcent, ycent, pts, r, start, stop)
- * double x[], y[]; Array of points
- * int pts Number of points in array
- * double xcent, ycent Center of cirlce
- * double r Radius of circle
- * double start, stop Beginning & ending angles
- */
+* calc_arc Calculate outline of a arc of a circle
+*
+* SYNOPSIS
+* calc_arc (x, y, xcent, ycent, pts, r, start, stop)
+* double x[], y[]; Array of points
+* int pts Number of points in array
+* double xcent, ycent Center of cirlce
+* double r Radius of circle
+* double start, stop Beginning & ending angles
+*/
void
PhantomElement::calcArcPoints (double x[], double y[], const int pts, const double xcent, const double ycent, const double r, const double start, const double stop)
{
- if (r <= 0.0)
- sys_error (ERR_WARNING, "negative or zero radius in calc_arc()");
-
- double theta = (stop - start) / (pts - 1); // angle incr. between points
- double c = cos(theta);
- double s = sin(theta);
+ if (r <= 0.0)
+ sys_error (ERR_WARNING, "negative or zero radius in calc_arc()");
- x[0] = r * cos (start) + xcent;
- y[0] = r * sin (start) + ycent;
-
- double xp = x[0] - xcent;
- double yp = y[0] - ycent;
- for (int i = 1; i < pts; i++) {
- double xc = c * xp - s * yp;
- double yc = s * xp + c * yp;
- x[i] = xc + xcent;
- y[i] = yc + ycent;
- xp = xc; yp = yc;
- }
+ double theta = (stop - start) / (pts - 1); // angle incr. between points
+ double c = cos(theta);
+ double s = sin(theta);
+
+ x[0] = r * cos (start) + xcent;
+ y[0] = r * sin (start) + ycent;
+
+ double xp = x[0] - xcent;
+ double yp = y[0] - ycent;
+ for (int i = 1; i < pts; i++) {
+ double xc = c * xp - s * yp;
+ double yc = s * xp + c * yp;
+ x[i] = xc + xcent;
+ y[i] = yc + ycent;
+ xp = xc; yp = yc;
+ }
}
void
PhantomElement::calcEllipsePoints (double x[], double y[], const int pts, const double u, const double v)
{
- calcArcPoints (x, y, m_nPoints, 0.0, 0.0, 1.0, 0.0, TWOPI); // make a unit circle
- scale2d (x, y, m_nPoints, m_u, m_v); // scale to ellipse
+ calcArcPoints (x, y, m_nPoints, 0.0, 0.0, 1.0, 0.0, TWOPI); // make a unit circle
+ scale2d (x, y, m_nPoints, m_u, m_v); // scale to ellipse
}
/* NAME
- * circle_pts Calculate number of points to use for circle segment
- *
- * SYNOPSIS
- * n = circle_pts (theta)
- * int n Number of points to use for arc
- * double theta Length of arc in radians
- */
+* circle_pts Calculate number of points to use for circle segment
+*
+* SYNOPSIS
+* n = circle_pts (theta)
+* int n Number of points to use for arc
+* double theta Length of arc in radians
+*/
int
PhantomElement::numCirclePoints (double theta)
{
- theta = clamp (theta, 0., TWOPI);
-
- return static_cast<int> (POINTS_PER_CIRCLE * theta / TWOPI + 1.5);
+ theta = clamp (theta, 0., TWOPI);
+
+ return static_cast<int> (POINTS_PER_CIRCLE * theta / TWOPI + 1.5);
}
double cx1 = x1, cy1 = y1, cx2 = x2, cy2 = y2;
if (! clip_rect (cx1, cy1, cx2, cy2, m_rectLimits))
return false;
-
+
// convert phantom coordinates to pelem coordinates
xform_mtx2 (m_xformPhmToObj, x1, y1);
xform_mtx2 (m_xformPhmToObj, x2, y2);
-
+
if (! clipLineNormalizedCoords (x1, y1, x2, y2))
return false;
-
+
// convert standard pelem coordinates back to phantom coordinates
xform_mtx2 (m_xformObjToPhm, x1, y1);
xform_mtx2 (m_xformObjToPhm, x2, y2);
-
+
return true;
}
/* NAME
- * pelem_clip_line Clip pelem against an arbitrary line
- *
- * SYNOPSIS
- * pelem_clip_line (pelem, x1, y1, x2, y2)
- * PhantomElement& pelem; Pelem to be clipped
- * double *x1, *y1, *x2, *y2 Endpoints of line to be clipped
- *
- * RETURNS
- * true if line passes through pelem
- * (x1, y1, x2, y2 hold coordinates of new line)
- * false if line do not pass through pelem
- * (x1, y1, x2, y2 are undefined)
- */
+* pelem_clip_line Clip pelem against an arbitrary line
+*
+* SYNOPSIS
+* pelem_clip_line (pelem, x1, y1, x2, y2)
+* PhantomElement& pelem; Pelem to be clipped
+* double *x1, *y1, *x2, *y2 Endpoints of line to be clipped
+*
+* RETURNS
+* true if line passes through pelem
+* (x1, y1, x2, y2 hold coordinates of new line)
+* false if line do not pass through pelem
+* (x1, y1, x2, y2 are undefined)
+*/
bool
PhantomElement::clipLineNormalizedCoords (double& x1, double& y1, double& x2, double& y2) const
{
bool accept = false;
-
+
switch (m_type) {
case PELEM_RECTANGLE:
double rect[4];
sys_error (ERR_WARNING, "Illegal pelem type %d [pelem_clip_line]", m_type);
break;
}
-
+
return(accept);
}
sys_error(ERR_WARNING, "Illegal coordinate type in pelem_is_point_inside");
return (false);
}
-
+
switch (m_type) {
case PELEM_RECTANGLE:
if (x > 1. || x < -1. || y > 1. || y < -1.)
else
return (true);
break;
-
+
// for clipping segments & sectors, must NOT scale by (1/u, 1/v)
// because this destroys information about size of arc component
-
+
case PELEM_SEGMENT:
if (x > 1. || x < -1. || y > 0.)
- return (false); // clip against y > 0
+ return (false); // clip against y > 0
x *= m_u; // put back u & v scale
y *= m_v;
if (x * x + (y-m_v) * (y-m_v) > m_u * m_u + m_v * m_v)
return (true);
break;
case PELEM_SECTOR:
- if (x > 1. || x < -1. || y > 1.) // extent
+ if (x > 1. || x < -1. || y > 1.) // extent
return (false);
- if (y > 1. - x || y > 1. + x) // triangle
- return (false); // clip against triangle
- x *= m_u; // circle: put back u & v scale
+ if (y > 1. - x || y > 1. + x) // triangle
+ return (false); // clip against triangle
+ x *= m_u; // circle: put back u & v scale
y *= m_v;
if (x * x + (y-m_v) * (y-m_v) > m_u * m_u + m_v * m_v)
- return (false); // clip against circle
+ return (false); // clip against circle
else
return (true);
- break;
+ break;
default:
sys_error (ERR_WARNING, "Illegal pelem type in pelem_is_point_inside()");
break;
}
-
+
return (false);
}
projects / ctsim.git / blobdiff