Programming and Graphics

7.7 Three-dimensional interactive graph 241

Function plot3dtrans

The implementation of the functionplot3dtransis:

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

plot3dtrans

transform a 3D plot produced

by drawplot3d

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

#include<fstream>

#include<iostream>

#include<iomanip>

#include<cmath>

#include "VOGLE/voglec++.h"

#include "drawplot3d.h"

#include "plot3dglobals.h"

using namespace std;

void plot3dtrans ()

{

char outfile[10];

float xaddr,yaddr;

int click;

//--- Initialize:

angx = angxinit;

angy = angyinit;

angz = angzinit;

zoom = zoominit;

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

loop over keys and buttons

until a key or button is pressed

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

again:

//--- Check the keyboard:

char kbd = char(checkkey());

//--- If ’r’ is pressed, reset:

if(kbd==’r’)

{