57 lines
2.4 KiB
C++
57 lines
2.4 KiB
C++
#include "frmparametriccurve.h"
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#include "ui_frmparametriccurve.h"
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#include "qdebug.h"
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frmParametricCurve::frmParametricCurve(QWidget *parent) : QWidget(parent), ui(new Ui::frmParametricCurve)
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{
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ui->setupUi(this);
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this->initForm();
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}
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frmParametricCurve::~frmParametricCurve()
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{
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delete ui;
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}
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void frmParametricCurve::initForm()
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{
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// create empty curve objects:
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QCPCurve *fermatSpiral1 = new QCPCurve(ui->customPlot->xAxis, ui->customPlot->yAxis);
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QCPCurve *fermatSpiral2 = new QCPCurve(ui->customPlot->xAxis, ui->customPlot->yAxis);
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QCPCurve *deltoidRadial = new QCPCurve(ui->customPlot->xAxis, ui->customPlot->yAxis);
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// generate the curve data points:
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const int pointCount = 500;
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QVector<QCPCurveData> dataSpiral1(pointCount), dataSpiral2(pointCount), dataDeltoid(pointCount);
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for (int i = 0; i < pointCount; ++i) {
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double phi = i / (double)(pointCount - 1) * 8 * M_PI;
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double theta = i / (double)(pointCount - 1) * 2 * M_PI;
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dataSpiral1[i] = QCPCurveData(i, qSqrt(phi) * qCos(phi), qSqrt(phi) * qSin(phi));
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dataSpiral2[i] = QCPCurveData(i, -dataSpiral1[i].key, -dataSpiral1[i].value);
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dataDeltoid[i] = QCPCurveData(i, 2 * qCos(2 * theta) + qCos(1 * theta) + 2 * qSin(theta), 2 * qSin(2 * theta) - qSin(1 * theta));
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}
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// pass the data to the curves; we know t (i in loop above) is ascending, so set alreadySorted=true (saves an extra internal sort):
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fermatSpiral1->data()->set(dataSpiral1, true);
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fermatSpiral2->data()->set(dataSpiral2, true);
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deltoidRadial->data()->set(dataDeltoid, true);
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// color the curves:
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fermatSpiral1->setPen(QPen(Qt::blue));
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fermatSpiral1->setBrush(QBrush(QColor(0, 0, 255, 20)));
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fermatSpiral2->setPen(QPen(QColor(255, 120, 0)));
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fermatSpiral2->setBrush(QBrush(QColor(255, 120, 0, 30)));
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QRadialGradient radialGrad(QPointF(310, 180), 200);
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radialGrad.setColorAt(0, QColor(170, 20, 240, 100));
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radialGrad.setColorAt(0.5, QColor(20, 10, 255, 40));
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radialGrad.setColorAt(1, QColor(120, 20, 240, 10));
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deltoidRadial->setPen(QPen(QColor(170, 20, 240)));
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deltoidRadial->setBrush(QBrush(radialGrad));
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// set some basic ui->customPlot config:
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ui->customPlot->setInteractions(QCP::iRangeDrag | QCP::iRangeZoom | QCP::iSelectPlottables);
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ui->customPlot->axisRect()->setupFullAxesBox();
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ui->customPlot->rescaleAxes();
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}
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