This MathGL example shows how to use MathGL to write a simple 3D plot to file. Then Qt is used to display this plot, like this screenshot (png).

Download the Qt Project of 'MathGLExample1' (zip)

Operating system: Ubuntu 10.04 LTS Lucid Lynx

IDE: Qt Creator 2.0.0

Project type: Qt4 Console Application

Compiler: G++ 4.4.1

Libraries used:

MathGL: version 1.9-2build1, from Ubuntu Software centre ('libmgl-dev')
Qt: version 4.7.0 (32 bit)

Qt project file


#-------------------------------------------------

#

# Project created by QtCreator 2010-07-23T13:24:48

#

#-------------------------------------------------

QT       += core gui

TARGET = CppMathGlExample1

CONFIG   += console

CONFIG   -= app_bundle

LIBS += -L/usr/local/lib -lmgl

TEMPLATE = app

SOURCES += main.cpp

Source code


#include <QApplication>

#include <QDialog>

#include <QLabel>

#include <QPixmap>

#include <QVBoxLayout>



#include <mgl/mgl.h>

#include <mgl/mgl_qt.h>



int main(int argc, char* argv[])

{

  //Qt startup

  QApplication a(argc, argv);



  //Using MathGL to write a plot to file

  mglGraphZB plot;

  plot.Alpha(true);

  plot.Light(true);

  plot.Light(0,mglPoint(1,0,-1));

  mglData data(2,2);

  data.Modify("x*y");

  plot.Axis(mglPoint(0,0,0),mglPoint(1,1,1));

  plot.Rotate(80,40);

  plot.Surf(data);

  plot.Box();

  plot.Puts(mglPoint(0.7,1,1.2),"a(x,y)");

  plot.WriteBMP("CppMathGlExample1.bmp");



  //Use Qt to display the saved plot

  QDialog dialog;

  QVBoxLayout layout;

  QPixmap pixmap("CppMathGlExample1.bmp");

  QLabel label;

  label.setPixmap(pixmap);

  layout.addWidget(&label);

  dialog.setLayout(&layout);

  dialog.show();

  return a.exec();

}

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(C++) MathGL example 1: a simple 3D plot

Qt project file

Source code