Programming and Graphics

226 Introduction to C++ Programming and Graphics

*------------------------

plot2d

Plot a line with axes

-------------------------*/

#include<cmath>

#include "VOGLE/voglec++.h"

#include "drawmarker2d.h"

#include "drawline2d.h"

#include "drawaxes2d.h"

using namespace std;

int main()

{

//--- Define the data:

const int n=512;

float xd[n], yd[n];

for (int i=0; i<n; i++)

{

xd[i]=-0.3+4.0*(i-1.0)/n;

yd[i]=0.5+0.3*sin(35.0*xd[i])*exp(xd[i]);

}

//--- Define the plotting parameters:

float xmin=0.0, xmax=1.0; // plotting limits

float ymin=0.0, ymax=1.0; // plotting limits

int ntcx =10; // number of ticks on the x axis

int ntcy =10; // number of ticks on the y axis

int Ilabelax =1; // 1 to label axes; 0 for no labels

int axc = BLACK; // axis color

int lbc = RED; // label color

char labelx[] = "x-axis"; // x-axis label

char labely[] = "y-axis"; // y-axis label

char title1[] ="vogle graphics"; // first plot title

char title2[] ="Eric H Echidna"; // second plot title

char title3[] ="Beerware"; // third plot title

//--- Launch the graphics:

float xmarg = 0.2*(xmax-xmin); // plotting margin

float ymarg = 0.2*(ymax-ymin);

prefposition (500,100);

prefsize (500,500);