jvx.geom
Class PwRefinePolygon

java.lang.Object
  |
  +--jvx.geom.PwRefinePolygon

public class PwRefinePolygon

extends java.lang.Object

Class to refine or coarsen a PgPolygon

Version:

28.05.01, 1.00 created (ur)

Author:

Ulrich Reitebuch

Constructor Summary

PwRefinePolygon()

Method Summary

static void	coarsenChaikin(PgPolygon poly) Coarsen a PgPolygon global by a reversed Chaikin algorithm.
static void	coarsenInterpolation(PgPolygon poly) Coarsen a PgPolygon by removing every second vertex.
static PsDialog	getDialog(PgPolygon poly) Pop up a new dialog window to steer refinement and coarsening.
static void	refineChaikin(PgPolygon poly) Refine a PgPolygon global by Chaikin's algorithm.
static void	refineDLG(PgPolygon poly) Refine a PgPolygon global by DLG scheme.

Methods inherited from class java.lang.Object

equals, getClass, hashCode, notify, notifyAll, toString, wait, wait, wait

Constructor Detail

PwRefinePolygon

public PwRefinePolygon()

Method Detail

refineDLG

public static void refineDLG(PgPolygon poly)

Refine a PgPolygon global by DLG scheme. Afterwards the polygon will have twice as much vertices, the vertices v(i) at even indices are the original vertices of the polygon, the vertices at odd indices are blended from the next two vertices in both directions by 1/16(-v(i-1) + 9v(i) + 9v(i+1) - v(i+2)).

coarsenInterpolation

public static void coarsenInterpolation(PgPolygon poly)

Coarsen a PgPolygon by removing every second vertex. This is the reverse algorithm for interpolating refinement algorithms.

refineChaikin

public static void refineChaikin(PgPolygon poly)

Refine a PgPolygon global by Chaikin's algorithm. On each edge of the polygon two vertices of the refined polygon will be computed at 1/4 and 3/4 length.

coarsenChaikin

public static void coarsenChaikin(PgPolygon poly)

Coarsen a PgPolygon global by a reversed Chaikin algorithm. Each vertex of the coarsened polygon gets blended from two of the extrapolated ancestor vertices of the edges v(i-2) to v(i-1) and v(i) to v(i+1).

getDialog

public static PsDialog getDialog(PgPolygon poly)

Pop up a new dialog window to steer refinement and coarsening.