Function:s2funt

void s2funt(float(*fx)(float*), float(*fy)(float*), float(*fz)(float*), int N, float tmin, float tmax);

#include <stdio.h>
#include <stdlib.h>
#include <math.h>
#include "s2plot.h"

#define XLIMIT 10.0
#define YLIMIT 10.0
#define ZLIMIT 50.0
#define TWOPI 6.2831853

float fx(float *t)
{
  return XLIMIT * sin(*t);
}

inline float fy(float *t)
{
  return YLIMIT * *t / TWOPI * cos(*t);
}

float fz(float *t)
{
  return 20. + (ZLIMIT * *t / TWOPI + 4.*sin(5* *t)*sin(3* *t))*0.5;
}


int main(int argc, char *argv[])
{
   float x1 = -XLIMIT, x2 = XLIMIT;             /* x world coord range */
   float y1 = -YLIMIT, y2 = YLIMIT;             /* y world coord range */
   float z1 = -ZLIMIT/4.0, z2 = ZLIMIT;         /* z world coord range */

   s2opend("/?",argc,argv);                     /* Open the display */
   s2swin(x1,x2,y1,y2,z1,z2);                   /* Set the window coordinates */
   s2box("BCDET",0,0,"BCDET",0,0,"BCDET",0,0);  /* Draw coordinate box */
   s2sci(S2_PG_YELLOW);

   s2slw(3);                                    /* Set the line width */
   s2funt(fx, fy, fz, 1000, -TWOPI, TWOPI);     /* Draw parametric line */
   s2show(1);					/* Open the s2plot window */
   
   return 1;
}