Programming and Graphics

7.7 Three-dimensional interactive graph 245

float zoom=1.0; // zoom

float angxinit = angx;

float angyinit = angy;

float angzinit = angz;

float zoominit = zoom;

int ntcx=4; // number of ticks on the x axis

int ntcy=4; // number of ticks on the y axis

int ntcz=4; // number of ticks on the z axis

int bgc=WHITE; // background color

int axc=RED; // axis color

int lbc=GREEN; // label color

int lnc=BLUE; // line color

int Iswap=1;

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

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

char labelz[]="z"; // y-axis label

char title1[12]="vogle"; // first title

char title2[12]="plot3d"; // second title

char title3[12]="beerware"; // third title

int Iaxes; // draw axes?

int Itick; // ticks on axes?

int Itry; // repeat index for animation

int np[21];

float xd[21][128];

float yd[21][128];

float zd[21][128];

int nc=2; // number of curves

//------------main----------------

int main()

{

//--- Preferences:

Iaxes = 1; // draw axes

Itick = 1; // draw ticks

int Itry = 1; // for animation

//--- Initialize the device:

char device[] = "X11";

prefposition (500,100);

prefsize (500,500);

vinit (device);

if(backbuffer()==0)

{

vexit();