X-Git-Url: http://git.kpe.io/?p=ctsim.git;a=blobdiff_plain;f=libctsim%2Fphantom.cpp;h=dff1d0ee6bcc137ab1257d31d828921ffc937f96;hp=a0ddc408937b8f8f382c36ae95bbc320a522ace0;hb=432ba2c487a5320352f14bdd2cce008fccef6902;hpb=f1e69bf8888b1462007c93c8d6bf3ae1e0ecec20 diff --git a/libctsim/phantom.cpp b/libctsim/phantom.cpp index a0ddc40..dff1d0e 100644 --- a/libctsim/phantom.cpp +++ b/libctsim/phantom.cpp @@ -9,7 +9,7 @@ ** 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 @@ -93,10 +93,10 @@ const char* Phantom::convertPhantomIDToName (int phmID) { static const char *name = ""; - + if (phmID >= 0 && phmID < s_iPhantomCount) - return (s_aszPhantomName[phmID]); - + return (s_aszPhantomName[phmID]); + return (name); } @@ -104,27 +104,27 @@ const char* 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) @@ -136,7 +136,7 @@ Phantom::createFromPhantom (const char* const phmName) m_failMessage += phmName; return false; } - + m_name = phmName; createFromPhantom (phmid); return true; @@ -146,57 +146,57 @@ bool 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(EOF)) @@ -209,7 +209,7 @@ Phantom::createFromFile (const char* const fname) } fclose (fp); - + return (bGoodFile); } @@ -217,37 +217,37 @@ bool 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++; } @@ -258,11 +258,11 @@ Phantom::addPElem (const char *type, const double cx, const double cy, const dou /* 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 @@ -272,13 +272,13 @@ 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 @@ -289,13 +289,13 @@ Phantom::print (std::ostringstream& 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"; } } @@ -319,11 +319,11 @@ Phantom::printDefinitions (std::ostringstream& os) const /* 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 @@ -331,9 +331,9 @@ Phantom::show () const { SGPDriver driverSGP ("Phantom Show"); SGP sgp (driverSGP); - + show (sgp); - + std::cout << "Press return to continue"; cio_kb_getc(); } @@ -343,26 +343,26 @@ Phantom::show (SGP& sgp) const { 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 @@ -375,13 +375,13 @@ Phantom::draw (SGP& sgp) const /* 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 () @@ -401,12 +401,12 @@ 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 () @@ -431,15 +431,15 @@ 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 @@ -448,84 +448,92 @@ Phantom::convertToImagefile (ImageFile& im, double dViewRatio, const int in_nsam } 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(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; + } } } @@ -540,15 +548,15 @@ Phantom::convertToImagefile (ImageFile& im, const double dViewRatio, const int i 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; } @@ -557,8 +565,8 @@ PhantomElement::PhantomElement (const char *type, const double cx, const double PhantomElement::~PhantomElement () { - delete m_xOutline; - delete m_yOutline; + delete m_xOutline; + delete m_yOutline; } void @@ -578,29 +586,29 @@ PhantomElement::printDefinition (std::ostringstream& os) const 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) @@ -611,7 +619,7 @@ PhantomElement::convertTypeToName (PhmElemType iType) pszType = "sector"; else if (iType == PELEM_SEGMENT) pszType = "segment"; - + return pszType; } @@ -620,23 +628,23 @@ void 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); @@ -646,15 +654,15 @@ PhantomElement::makeTransformMatrices () /* 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 () @@ -662,7 +670,7 @@ PhantomElement::makeVectorOutline () double radius, theta, start, stop; double xfact, yfact; int cpts; - + m_nPoints = 0; switch (m_type) { case PELEM_RECTANGLE: @@ -735,10 +743,10 @@ PhantomElement::makeVectorOutline () // 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; @@ -747,39 +755,39 @@ PhantomElement::makeVectorOutline () /* 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; + } } @@ -794,26 +802,26 @@ PhantomElement::calcArcPoints (double x[], double y[], const int pts, const doub 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 (POINTS_PER_CIRCLE * theta / TWOPI + 1.5); + theta = clamp (theta, 0., TWOPI); + + return static_cast (POINTS_PER_CIRCLE * theta / TWOPI + 1.5); } @@ -824,42 +832,42 @@ PhantomElement::clipLineWorldCoords (double& x1, double& y1, double& x2, double 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]; @@ -883,7 +891,7 @@ PhantomElement::clipLineNormalizedCoords (double& x1, double& y1, double& x2, do sys_error (ERR_WARNING, "Illegal pelem type %d [pelem_clip_line]", m_type); break; } - + return(accept); } @@ -909,7 +917,7 @@ PhantomElement::isPointInside (double x, double y, const CoordType coord_type) c 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.) @@ -931,13 +939,13 @@ PhantomElement::isPointInside (double x, double y, const CoordType coord_type) c 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) @@ -946,22 +954,22 @@ PhantomElement::isPointInside (double x, double y, const CoordType coord_type) c 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); }