flip method

void flip()

Modifies the curve in place to progress in the opposite direction.

Implementation

void flip()
{
  double temp = this.x0;
  this.x0 = this.x3;
  this.x3 = temp;
  temp = this.y0;
  this.y0 = this.y3;
  this.y3 = temp;

  temp = this.x1;
  this.x1 = this.x2;
  this.x2 = temp;
  temp = this.y1;
  this.y1 = this.y2;
  this.y2 = temp;
}