Constructor Detail

• Utils

  public Utils()

Method Detail

• getXYEllipseBounds

  public static final void getXYEllipseBounds(int a,
                                              int b,
                                              int[] lineBounds)

  Store the half-widths of a X line to scan to fill an ellipse of given axis lengths. The parameter a is the axis half-length in the X direction, and b is the axis half-length in the Y direction.

  The half-widths will be stored in the array lineBounds, which must be of size equal to at least b+1.

  This is an implementation of the McIlroy's algorithm, adapted freely from http://enchantia.com/software/graphapp/doc/tech/ellipses.html.

  Parameters:

  a - half-length of the ellipse in the X direction

  b - half-length of the ellipse in the Y direction

  lineBounds - will store the half-length of the ellipse lines in the X direction

• getXYCircleBounds

  public static final void getXYCircleBounds(int radius,
                                             int[] lineBounds)

  Midpoint circle algorithm: store the bounds of a circle in the given array. From http://en.wikipedia.org/wiki/Midpoint_circle_algorithm

  Parameters:

  radius - the radius of the circle

  lineBounds - the array to store bounds in