import java.awt.*;

public class CatmullRom extends Bspline {

  // Catmull-Rom spline is just like a B spline, only with a different basis
  float b(int i, float t) {
    switch (i) {
    case -2:
      return ((-t+2)*t-1)*t/2;
    case -1:
      return (((3*t-5)*t)*t+2)/2;
    case 0:
      return ((-3*t+4)*t+1)*t/2;
    case 1:
      return ((t-1)*t*t)/2;
    }
    return 0; //we only get here if an invalid i is specified
  }
  
}