bezier.h File Reference

---

Detailed Description

Author:

unknown_author

Date:

2003-11-19

Version:

Id

bezier.h 8236 2010-02-10 11:16:41Z behrisch

Definition in file bezier.h.

#include <config.h>

Go to the source code of this file.

Functions
void	bezier (int npts, SUMOReal b[], int cpts, SUMOReal p[])

---

Function Documentation

void bezier	(	int	npts,
		SUMOReal	b[],
		int	cpts,
		SUMOReal	p[]
	)

Definition at line 107 of file bezier.cpp.

References Basis(), factrl(), Ni(), and SUMOReal.

Referenced by NBNode::computeInternalLaneShape().

                                                       {
    int i;
    int j;
    int i1;
    int icount;
    int jcount;

    SUMOReal step;
    SUMOReal t;

    SUMOReal factrl(int);
    SUMOReal Ni(int,int);
    SUMOReal Basis(int,int,SUMOReal);

    /*    calculate the points on the Bezier curve */

    icount = 0;
    t = 0;
    step = (SUMOReal) 1.0/(cpts -1);

    for (i1 = 1; i1<=cpts; i1++) { /* main loop */

        if ((1.0 - t) < 5e-6) t = 1.0;

        for (j = 1; j <= 3; j++) { /* generate a point on the curve */
            jcount = j;
            p[icount+j] = 0.;
            for (i = 1; i <= npts; i++) { /* Do x,y,z components */
                p[icount + j] = p[icount + j] + Basis(npts-1,i-1,t)*b[jcount];
                jcount = jcount + 3;
            }
        }

        icount = icount + 3;
        t = t + step;
    }
}