code: @Override
  	public void set(double x1, double y1, double z1, double x2, double y2, double z2, double radius1) {
  		this.medial1.set(x1, y1, z1);
  		this.medial2.set(x2, y2, z2);
  		this.radius = radius1;
  		ensureAIsLowerPoint();
  	}
docs: Set the capsule.
  
  @param x1 x coordinate of the first point of the capsule's segment.
  @param y1 y coordinate of the first point of the capsule's segment.
  @param z1 z coordinate of the first point of the capsule's segment.
  @param x2 x coordinate of the second point of the capsule's segment.
  @param y2 y coordinate of the second point of the capsule's segment.
  @param z2 z coordinate of the second point of the capsule's segment.
  @param radius1 the radius of the capsule.