Programming and Graphics

7.7 Three-dimensional interactive graph 247

vexit();

return 0;

}

The plotting parameters are passed to the functionsdrawplot3d.ccandplot
3dtrans.cc as global variables through the header file drawplot3d
globals.h:

#ifndef DRAWPLOT3DGLOBALSH

#define DRAWPLOT3DGLOBALSH

extern float xmin, xmax;

extern float ymin, ymax;

extern float zmin, zmax;

extern float vx, vy, vz;

extern float twist;

extern float angx; // rotation angle

extern float angy; // rotation angle

extern float angz; // rotation angle

extern float zoom; // zoom

extern float angxinit;

extern float angyinit;

extern float angzinit;

extern float zoominit;

extern int ntcx; // number of ticks on the x axis

extern int ntcy; // number of ticks on the y axis

extern int ntcz; // number of ticks on the y axis

extern int bgc; // background color

extern int axc; // axis color

extern int lbc; // label color

extern int lnc; // line color

extern int Iswap;

extern char labelx[]; // x-axis label

extern char labely[]; // y-axis label

extern char labelz[]; // y-axis label

extern char title1[]; // first title

extern char title2[]; // second title

extern char title3[]; // third title

extern int Iaxes; // draw axes?

extern int Itick; // ticks on axes?

extern int Itry; // repeat index for animation

extern int nc;

extern int np[];

extern float xd[][128];

extern float yd[][128];

extern float zd[][128];

#endif