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tests/splineprof/main.cpp

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+/*****************************************************************************
+* Qwt Examples - Copyright (C) 2002 Uwe Rathmann
+* This file may be used under the terms of the 3-clause BSD License
+*****************************************************************************/
+
+#include <QwtSplinePleasing>
+#include <QwtSplineLocal>
+#include <QwtSplineCubic>
+#include <QwtSplineParametrization>
+
+#include <QElapsedTimer>
+
+#include <QPolygon>
+#include <QLine>
+#include <QDebug>
+
+static void testSpline( const char* name, QwtSplineInterpolating* spline,
+    int type, const QPolygonF& points )
+{
+    spline->setParametrization( type );
+
+    QElapsedTimer timer;
+    timer.start();
+
+    const QVector< QLineF > lines = spline->bezierControlLines( points );
+
+    qDebug() << name << ":" << timer.elapsed();
+}
+
+static void testSplines( int paramType, const QPolygonF& points )
+{
+#if 0
+    QwtSplinePleasing splinePleasing;
+    testSpline( "Pleasing", &splinePleasing, paramType, points );
+#endif
+
+#if 1
+    QwtSplineLocal splineCardinal( QwtSplineLocal::Cardinal );
+    testSpline( "Cardinal", &splineCardinal, paramType, points );
+#endif
+
+#if 1
+    QwtSplineLocal splinePC( QwtSplineLocal::PChip );
+    testSpline( "PChip", &splinePC, paramType, points );
+#endif
+
+#if 1
+    QwtSplineLocal splineAkima( QwtSplineLocal::Akima );
+    testSpline( "Akima", &splineAkima, paramType, points );
+#endif
+
+#if 1
+    QwtSplineLocal splinePB( QwtSplineLocal::ParabolicBlending );
+    testSpline( "Parabolic Blending", &splinePB, paramType, points );
+#endif
+
+#if 1
+    QwtSplineCubic splineC2;
+    testSpline( "Cubic", &splineC2, paramType, points );
+#endif
+}
+
+int main()
+{
+    QPolygonF points;
+
+    for ( int i = 0; i < 10e6; i++ )
+        points += QPointF( i, std::sin( i ) );
+
+#if 1
+    qDebug() << "=== X";
+    testSplines( QwtSplineParametrization::ParameterX, points );
+#endif
+
+#if 1
+    qDebug() << "=== Y";
+    testSplines( QwtSplineParametrization::ParameterY, points );
+#endif
+
+#if 1
+    qDebug() << "=== Uniform";
+    testSplines( QwtSplineParametrization::ParameterUniform, points );
+#endif
+
+#if 1
+    qDebug() << "=== Manhattan";
+    testSplines( QwtSplineParametrization::ParameterManhattan, points );
+#endif
+
+#if 1
+    qDebug() << "=== Chordal";
+    testSplines( QwtSplineParametrization::ParameterChordal, points );
+#endif
+
+#if 1
+    qDebug() << "=== Centripetral";
+    testSplines( QwtSplineParametrization::ParameterCentripetal, points );
+#endif
+
+    return 0;
+}

tests/splineprof/splineprof.pro

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+################################################################
+# Qwt Widget Library
+# Copyright (C) 1997   Josef Wilgen
+# Copyright (C) 2002   Uwe Rathmann
+#
+# This library is free software; you can redistribute it and/or
+# modify it under the terms of the Qwt License, Version 1.0
+################################################################
+
+include( $${PWD}/../tests.pri )
+
+CONFIG -= gui
+
+TARGET = splineprof
+
+SOURCES = \
+    main.cpp
+