PARP Research Group

Universidad de Murcia

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src/qvip/qvpolylinef.cpp Go to the documentation of this file. /* * Copyright (C) 2007, 2008, 2009, 2010, 2011, 2012. PARP Research Group. * <http://perception.inf.um.es> * University of Murcia, Spain. * * This file is part of the QVision library. * * QVision is free software: you can redistribute it and/or modify * it under the terms of the GNU Lesser General Public License as * published by the Free Software Foundation, version 3 of the License. * * QVision is distributed in the hope that it will be useful, * but WITHOUT ANY WARRANTY; without even the implied warranty of * MERCHANTABILITY or FITNESS FOR A PARTICULAR PURPOSE. See the * GNU Lesser General Public License for more details. * * You should have received a copy of the GNU Lesser General Public * License along with QVision. If not, see <http://www.gnu.org/licenses/>. */ #include <QVPolyline> #include <QVPolylineF> #include <qvmath.h> #include <qvdefines.h> //#include <qvmatrixalgebra.h> #include <iostream> #include <float.h> QVPolylineF::QVPolylineF(const int estimatedSize): QList<QPointF>(), closed(false), direction(false)//, dir(0) { qDebug() << "QVPolylineF()"; if (estimatedSize > 0) #ifdef QT_MIN_VERSION_4_7 QList<QPointF>::reserve(estimatedSize); #else Q_WARNING("cannot reserve a size for Qt versions older than 4.7"); #endif // QT_MIN_VERSION_4_7 qDebug() << "QVPolylineF() <~ return"; }; QVPolylineF::QVPolylineF(const QVPolyline &polyline): QList<QPointF>(), closed(polyline.closed), direction(polyline.direction)//, dir(polyline.dir) { foreach(QPoint point, polyline) { append(QPointF(point)); } qDebug() << "QVPolylineF(const QVPolylineF &)"; qDebug() << "QVPolylineF(const QVPolylineF &) <~ return"; }; QVPolylineF::QVPolylineF(const QVPolylineF &polyline): QList<QPointF>(polyline), closed(polyline.closed), direction(polyline.direction)//, dir(polyline.dir) { qDebug() << "QVPolylineF(const QVPolylineF &)"; qDebug() << "QVPolylineF(const QVPolylineF &) <~ return"; }; // QPointF linesIntersection(QPointF a, QPointF b, QPointF c, QPointF d) // // gets the intersection point for lines ab and cd // { // double x1 = a.rx(), x2 = b.rx(), x3 = c.rx(), x4 = d.rx(); // double y1 = a.ry(), y2 = b.ry(), y3 = c.ry(), y4 = d.ry(); // // double denominador = (y4 - y3)*(x2 - x1) - (x4 - x3)*(y2 - y1); // if (denominador == 0) // return QPointF( (int)(b.rx() + c.rx())/2, (int)(b.ry() + c.ry())/2 ); // // double ua = (x4 - x3)*(y1 - y3) - (y4 - y3)*(x1 - x3), // ub = (x2 - x1)*(y1 - y3) - (y2 - y1)*(x1 - x3); // // QPointF p = QPointF( // (int) (x1 + ua*(x2 - x1) / denominador), // (int) (y1 + ub*(y2 - y1) / denominador) // ); // return p; // } QVPolylineF QVPolylineF::ellipse(uInt n, float x, float y, float maxRadio, float minRadio, float ang) { QVPolylineF ellipse; float w = 2*PI/(n-1); float maxArg = (maxRadio+minRadio)/2; float minArg = (maxRadio-minRadio)/2; for (uInt t = 0; t < n; t++) ellipse.append(QPointF ( (x + maxArg*cos(ang+w*t) + minArg*cos(ang-w*t)), (y + maxArg*sin(ang+w*t) + minArg*sin(ang-w*t)) )); return ellipse; } QVPolylineF QVPolylineF::rectangle(float x1, float y1, float x2, float y2) { QVPolylineF rectangle; rectangle.append(QPointF( x1, y1 )); rectangle.append(QPointF( x1, y2 )); rectangle.append(QPointF( x2, y2 )); rectangle.append(QPointF( x2, y1 )); rectangle.append(QPointF( x1, y1 )); return rectangle; } QVPolylineF::operator QVPolyline() const { QVPolyline polyline; foreach(QPointF pointf, *this) { polyline.append( QPoint(pointf.toPoint()) ); } return polyline; } bool QVPolylineF::surrounds(const QPointF &p) const { if (size() < 3) return false; double angle = qvClockWiseAngle(operator[](0) - p, operator[](1) - p); for (int i=1; i<size()-1; i++) angle += qvClockWiseAngle(operator[](i) - p, operator[](i+1) - p); return ABS(angle) >= PI; } std::ostream& operator << ( std::ostream &os, const QVPolylineF &polylinef) { const int size = polylinef.size(); os << "QVPolyline (" << size << ")" ; os << " [" ; for (int i=0; i < size; i++) { os << " (" << polylinef[i].x() << "," << polylinef[i].y() << ")"; if(i!=size-1) os << ","; else os << " "; } os << "]" ; return os; }

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