mirror of
https://github.com/jkriege2/JKQtPlotter.git
synced 2024-11-15 10:05:47 +08:00
150 lines
6.5 KiB
C++
150 lines
6.5 KiB
C++
/** \example geo_bezier.cpp
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* Shows how to plot bezier curves as geometric elements with JKQTPlotter
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*
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* \ref JKQTPlotterGeometricBezier
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*/
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#include "jkqtpexampleapplication.h"
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#include <QApplication>
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#include "jkqtplotter/jkqtplotter.h"
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#include "jkqtplotter/graphs/jkqtpgeolines.h"
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#include "jkqtplotter/graphs/jkqtpscatter.h"
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int main(int argc, char* argv[])
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{
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JKQTPAppSettingController highDPIController(argc, argv);
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JKQTPExampleApplication app(argc, argv);
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// 1. create a plotter window
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JKQTPlotter plot;
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// 2. format graph:
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// 2.1 set the graph scales manually
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plot.setXY(0.05,10.05,0.05,3.15);
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// 2.2 set the asxpect ratio to 1
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plot.getPlotter()->setMaintainAspectRatio(true);
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plot.getPlotter()->setAspectRatio(10.05/3.05);
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plot.getPlotter()->setMaintainAxisAspectRatio(true);
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plot.getPlotter()->setAxisAspectRatio(10.05/3.05);
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// 2.3 set the asxpect ratio to 1
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plot.getXAxis()->setDrawGrid(false);
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plot.getYAxis()->setDrawGrid(false);
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auto fx1=[&](double i) { return 0.25+(3.0-i)*9.0/4.0;};
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auto fx2=[&](double i) { return (4.0-i)*9.0/4.0;};
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// 3.1 demonastrate linear bezier curve
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JKQTPGeoBezierCurve* bezLine=new JKQTPGeoBezierCurve(&plot);
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bezLine->setDrawMode(JKQTPGeometricPlotElement::DrawAsGraphicElement);
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bezLine->setLine(QPointF(fx1(0),0.25), QPointF(fx2(0),2.75));
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bezLine->setLineColor(QColor("maroon"));
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plot.addGraph(bezLine);
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JKQTPXYScatterGraph* scatLine=new JKQTPXYScatterGraph(&plot);
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scatLine->setXYColumns(plot.getDatastore()->addCopiedPoints(bezLine->getPoints()));
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scatLine->setSymbolColor(QColor("blue"));
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scatLine->setSymbolType(JKQTPCircle);
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plot.addGraph(scatLine);
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// 3.2 demonastrate quad bezier curve
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JKQTPGeoPolyLines* l1;
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JKQTPGeoBezierCurve* bezQuad=new JKQTPGeoBezierCurve(&plot);
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bezQuad->setDrawMode(JKQTPGeometricPlotElement::DrawAsGraphicElement);
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bezQuad->setQuad(QPointF(fx1(1),0.25), QPointF(fx1(1)+0.25,2.5), QPointF(fx2(1),2.75));
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bezQuad->setLineColor(QColor("maroon"));
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plot.addGraph(bezQuad);
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plot.addGraph(l1=new JKQTPGeoPolyLines(&plot, bezQuad->getPoints()));
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l1->setLineColor(QColor("darkgrey"));
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l1->setLineWidth(1);
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JKQTPXYScatterGraph* scatQuad=new JKQTPXYScatterGraph(&plot);
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scatQuad->setXYColumns(plot.getDatastore()->addCopiedPoints(bezQuad->getPoints()));
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scatQuad->setSymbolColor(QColor("blue"));
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scatQuad->setSymbolType(JKQTPCircle);
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plot.addGraph(scatQuad);
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// 3.3 demonastrate cubic bezier curve
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JKQTPGeoPolyLines* l2;
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JKQTPGeoBezierCurve* bezCubic=new JKQTPGeoBezierCurve(&plot);
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bezCubic->setDrawMode(JKQTPGeometricPlotElement::DrawAsGraphicElement);
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bezCubic->setCubic(QPointF(fx1(2),0.25), QPointF(fx1(2)+0.4,2.5), QPointF(fx2(2)-0.25,0.2), QPointF(fx2(2),2.75));
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bezCubic->setLineColor(QColor("maroon"));
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bezCubic->setHeadDecoratorStyle(JKQTPArrow);
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bezCubic->setTailDecoratorStyle(JKQTPArrow);
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plot.addGraph(bezCubic);
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plot.addGraph(l2=new JKQTPGeoPolyLines(&plot, bezCubic->getPoints()));
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l2->setLineColor(QColor("darkgrey"));
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l2->setLineWidth(1);
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JKQTPXYScatterGraph* scatCubic=new JKQTPXYScatterGraph(&plot);
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scatCubic->setXYColumns(plot.getDatastore()->addCopiedPoints(bezCubic->getPoints()));
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scatCubic->setSymbolColor(QColor("blue"));
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scatCubic->setSymbolType(JKQTPCircle);
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plot.addGraph(scatCubic);
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// 3.4 demonastrate quartic bezier curve
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JKQTPGeoPolyLines* l3;
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JKQTPGeoBezierCurve* bezQuart=new JKQTPGeoBezierCurve(&plot);
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bezQuart->setDrawMode(JKQTPGeometricPlotElement::DrawAsGraphicElement);
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bezQuart->setQuartic(QPointF(fx1(3),2.25), QPointF((fx2(3)+fx1(3))/2.0,2), QPointF(fx1(3),0.75), QPointF((fx2(3)+fx1(3))/2.0,1.5), QPointF(fx2(3),0.2));
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bezQuart->setLineColor(QColor("maroon"));
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bezQuart->setHeadDecoratorStyle(JKQTPArrow);
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bezQuart->setTailDecoratorStyle(JKQTPArrow);
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plot.addGraph(bezQuart);
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plot.addGraph(l3=new JKQTPGeoPolyLines(&plot, bezQuart->getPoints()));
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l3->setLineColor(QColor("darkgrey"));
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l3->setLineWidth(1);
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JKQTPXYScatterGraph* scatQuartic=new JKQTPXYScatterGraph(&plot);
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scatQuartic->setXYColumns(plot.getDatastore()->addCopiedPoints(bezQuart->getPoints()));
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scatQuartic->setSymbolColor(QColor("blue"));
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scatQuartic->setSymbolType(JKQTPCircle);
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plot.addGraph(scatQuartic);
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// 4. show plotter and make it a decent size
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plot.show();
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plot.resize(600/plot.devicePixelRatioF(),250/plot.devicePixelRatioF());
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app.addExportStepFunctor([&](){
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bezLine->setDrawMode(JKQTPGeometricPlotElement::DrawAsMathematicalCurve);
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bezQuad->setDrawMode(JKQTPGeometricPlotElement::DrawAsMathematicalCurve);
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bezCubic->setDrawMode(JKQTPGeometricPlotElement::DrawAsMathematicalCurve);
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bezQuart->setDrawMode(JKQTPGeometricPlotElement::DrawAsMathematicalCurve);
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plot.redrawPlot();
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});
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app.addExportStepFunctor([&](){
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plot.getPlotter()->setMaintainAspectRatio(false);
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plot.getPlotter()->setMaintainAxisAspectRatio(false);
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plot.setXY(0.2,8.8,0.15,3.9);
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bezLine->setDrawMode(JKQTPGeometricPlotElement::DrawAsMathematicalCurve);
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bezQuad->setDrawMode(JKQTPGeometricPlotElement::DrawAsMathematicalCurve);
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bezCubic->setDrawMode(JKQTPGeometricPlotElement::DrawAsMathematicalCurve);
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bezQuart->setDrawMode(JKQTPGeometricPlotElement::DrawAsMathematicalCurve);
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l1->setDrawMode(JKQTPGeometricPlotElement::DrawAsMathematicalCurve);
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l2->setDrawMode(JKQTPGeometricPlotElement::DrawAsMathematicalCurve);
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l3->setDrawMode(JKQTPGeometricPlotElement::DrawAsMathematicalCurve);
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plot.getXAxis()->setLogAxis(true);
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plot.getYAxis()->setLogAxis(true);
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plot.redrawPlot();
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});
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app.addExportStepFunctor([&](){
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plot.getPlotter()->setMaintainAspectRatio(false);
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plot.getPlotter()->setMaintainAxisAspectRatio(false);
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plot.getXAxis()->setLogAxis(true);
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plot.getYAxis()->setLogAxis(true);
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bezLine->setDrawMode(JKQTPGeometricPlotElement::DrawAsGraphicElement);
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bezQuad->setDrawMode(JKQTPGeometricPlotElement::DrawAsGraphicElement);
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bezCubic->setDrawMode(JKQTPGeometricPlotElement::DrawAsGraphicElement);
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bezQuart->setDrawMode(JKQTPGeometricPlotElement::DrawAsGraphicElement);
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l1->setDrawMode(JKQTPGeometricPlotElement::DrawAsGraphicElement);
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l2->setDrawMode(JKQTPGeometricPlotElement::DrawAsGraphicElement);
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l3->setDrawMode(JKQTPGeometricPlotElement::DrawAsGraphicElement);
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plot.redrawPlot();
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});
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return app.exec();
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}
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