Programming and Graphics

244 Introduction to C++ Programming and Graphics

//--- Zoom if middle button is pressed:

if(click==2)

{

zoom = zoominit*(xaddr+1.0);

color(bgc);

clear();

drawplot3d ();

}

goto again;

//--- Done

return;

}

Code plot3d

The following main program contained in the fileplot3d.ccdefines and
plots data points based on the two functions we have constructed:

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

plot3d

interactive 3-D plot

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

#include<iostream>

#include<cmath>

#include "VOGLE/voglec++.h"

#include "drawplot3d.h"

#include "plot3dtrans.h"

using namespace std;

//--- Global variables:

const float pi=3.1415926;

float xmin=0, xmax=1;

float ymin=0, ymax=1;

float zmin=0, zmax=1;

float vx=0.1, vy=0.1, vz=0.5*zmax;

float twist=0;

float angx=0; // rotation angle

float angy=0; // rotation angle

float angz=0; // rotation angle