/*
  INTERPOLATION ROUTINES

  All take the form

  double interpolateWhatever( double x1, double x2, double alpha )

    if you change alpha gradually from 0 to 1 the return value will start at x1, and finish at x2

*/


#ifndef __INTERPOLATE_H__
#define __INTERPOLATE_H__





//---- INTERPOLATION FUNCTION TYPE

typedef double (*INTERPOLATION_FUNCTION)( double, double, double );





//---- INTERPOLATION FUNCTIONS

double interpolateLinear ( double x1, double x2, double a );
double interpolateSpringy( double x1, double x2, double a );  //  Has a little bounce at the end





#endif