#include "MGCLStdAfx.h"
/********************************************************************/
/* Copyright (c) 2017 System fugen G.K. and Yuzi Mizuno          */
/* All rights reserved.                                             */
/********************************************************************/
// bkdtkt_ WILL GENERATE KNOT VECTORt from the data points tau.
// t[i], 0<=i<=n+k-1 are generated as:
//    t[0]=t[1]=--=t[k-1]=tau[0] 
//    t[i+k]=(tau[i+1]+---+tau[i+k-1])/(k-1) for 0<=i<=n-k-1
//    t[n]=t[n+1]=---=t[n+k-1] = tau[n-1] 
// *** INPUT * 
//     tau[n]    :  DATA POINT SEQUENCE 
//     n         :  NUM OF DATA POINTS. 
//     k         :  ORDER OF B-REP. 
// *** OUTPUT * 
//     t[n+k]    :  KNOT VECTOR 
void bkdtkt_(const double *tau, int n, int k, double *t){
    int i, j, nm1,km1, nmk;
    double t1,fkm1;

    km1=k-1;
	nm1=n-1;
    for(i=0; i<=km1; ++i){
		t[i] = tau[0];
		t[n+i] = tau[nm1];
    }

    nmk=n-k;
    fkm1=(double)km1;
    for(i=0; i<nmk; ++i){
		t1 = 0.f;
		for(j=1; j<=km1; ++j)	
			t1 += tau[i+j];
		t[i+k] = t1/fkm1;
	}
}