mirror of
https://github.com/jkriege2/JKQtPlotter.git
synced 2024-11-16 02:25:50 +08:00
110 lines
4.2 KiB
C++
110 lines
4.2 KiB
C++
/** \example imageplot_modifier.cpp
|
|
* Shows how to plot colored math images/matrices modified by a second data-column/image with JKQTPlotter
|
|
*
|
|
* \ref JKQTPlotterImagePlotModifier
|
|
*/
|
|
|
|
#include <QApplication>
|
|
#include <cmath>
|
|
#include "jkqtplotter/jkqtplotter.h"
|
|
#include "jkqtplotter/graphs/jkqtpimage.h"
|
|
|
|
int main(int argc, char* argv[])
|
|
{
|
|
|
|
#if QT_VERSION >= 0x050600
|
|
QApplication::setAttribute(Qt::AA_EnableHighDpiScaling); // DPI support
|
|
QCoreApplication::setAttribute(Qt::AA_UseHighDpiPixmaps); //HiDPI pixmaps
|
|
#endif
|
|
QApplication app(argc, argv);
|
|
|
|
|
|
JKQTPlotter plot;
|
|
// 1. create a plotter window and get a pointer to the internal datastore (for convenience)
|
|
plot.getPlotter()->setUseAntiAliasingForGraphs(true); // nicer (but slower) plotting
|
|
plot.getPlotter()->setUseAntiAliasingForSystem(true); // nicer (but slower) plotting
|
|
plot.getPlotter()->setUseAntiAliasingForText(true); // nicer (but slower) text rendering
|
|
JKQTPDatastore* ds=plot.getDatastore();
|
|
|
|
// 2. now we create data for the charts (taken from https://commons.wikimedia.org/wiki/File:Energiemix_Deutschland.svg)
|
|
const int NX=150; // image dimension in x-direction [pixels]
|
|
const int NY=150; // image dimension in x-direction [pixels]
|
|
double image[NX*NY]; // row-major image
|
|
double modifier[NX*NY]; // row-major modfier image
|
|
|
|
// 2 calculate image of airy disk in a row-major array
|
|
double x, y=-static_cast<double>(NY)/2.0;
|
|
for (int iy=0; iy<NY; iy++ ) {
|
|
x=-static_cast<double>(NX)/2.0;
|
|
for (int ix=0; ix<NX; ix++ ) {
|
|
const double r=sqrt(x*x+y*y);
|
|
image[iy*NX+ix] = cos(JKQTPSTATISTICS_PI*r/20.0);
|
|
modifier[iy*NX+ix] = 1.0-r/sqrt(NX*NX/4.0+NY*NY/4.0);
|
|
x+=1;
|
|
}
|
|
y+=1;
|
|
}
|
|
|
|
|
|
|
|
// 3. make data availJKQTPSTATISTICS_PI to JKQTPlotter by adding it to the internal datastore.
|
|
// In this step the contents of C-array airydisk is copied into a column
|
|
// of the datastore in row-major order
|
|
size_t cImage=ds->addCopiedImageAsColumn(image, NX, NY, "imagedata");
|
|
size_t cModifier=ds->addCopiedImageAsColumn(modifier, NX, NY, "modifier");
|
|
|
|
|
|
// 4. create a graph (JKQTPColumnMathImage) with the column created above as data
|
|
// The data is color-coded with the color-palette JKQTPMathImageMATLAB
|
|
// the converted range of data is determined automatically because setAutoImageRange(true)
|
|
JKQTPColumnMathImage* graph=new JKQTPColumnMathImage(&plot);
|
|
graph->setTitle("");
|
|
// image column with the data
|
|
graph->setImageColumn(cImage);
|
|
// now set the modifier image:
|
|
graph->setModifierColumn(cModifier);
|
|
graph->setAutoModifierRange(true);
|
|
// ... and specify which image property is modified (here the saturation, but ModifyAlpha for the transparency and ModifyValue from the HSV color-model are also possible):
|
|
graph->setModifierMode(JKQTPMathImageModifierMode::ModifySaturation);
|
|
// set size of the data (the datastore does not contain this info, as it only manages 1D columns of data and this is used to assume a row-major ordering
|
|
graph->setNx(NX);
|
|
graph->setNy(NY);
|
|
// where does the image start in the plot, given in plot-axis-coordinates (bottom-left corner)
|
|
graph->setX(-NX/2.0);
|
|
graph->setY(-NX/2.0);
|
|
// width and height of the image in plot-axis-coordinates
|
|
graph->setWidth(NX);
|
|
graph->setHeight(NY);
|
|
// color-map is "MATLAB"
|
|
graph->setColorPalette(JKQTPMathImageMATLAB);
|
|
// determine min/max of data automatically and use it to set the range of the color-scale
|
|
graph->setAutoImageRange(true);
|
|
|
|
|
|
|
|
|
|
// 5. add the graphs to the plot, so it is actually displayed
|
|
plot.addGraph(graph);
|
|
|
|
|
|
// 6. set axis labels
|
|
plot.getXAxis()->setAxisLabel("x [{\\mu}m]");
|
|
plot.getYAxis()->setAxisLabel("y [{\\mu}m]");
|
|
|
|
|
|
// 7. fix axis and plot aspect ratio to 1
|
|
plot.getPlotter()->setMaintainAspectRatio(true);
|
|
plot.getPlotter()->setMaintainAxisAspectRatio(true);
|
|
|
|
// 8 autoscale the plot so the graph is contained
|
|
plot.zoomToFit();
|
|
|
|
// show plotter and make it a decent size
|
|
plot.show();
|
|
plot.resize(600,600);
|
|
plot.setWindowTitle("JKQTPColumnMathImage");
|
|
|
|
|
|
return app.exec();
|
|
}
|