code: public void set(double a1, double b1, double c1, double d1) {
  		this.a = a1;
  		this.b = b1;
  		this.c = c1;
  		this.d = d1;
  		clearBufferedValues();
  	}
docs: Set this pane with the given factors.
  
  @param a1 is the first factor of the plane equation.
  @param b1 is the first factor of the plane equation.
  @param c1 is the first factor of the plane equation.
  @param d1 is the first factor of the plane equation.