Class OutlineExtractor

java.lang.Object

org.apache.commons.math3.geometry.euclidean.threed.OutlineExtractor

public class OutlineExtractor
extends Object

Extractor for polyhedrons sets outlines.

This class extracts the 2D outlines from {polyhedrons sets in a specified projection plane.

Since:

3.0

Nested Class Summary

Nested Classes

Modifier and Type	Class	Description
private class	OutlineExtractor.BoundaryProjector	Visitor projecting the boundary facets on a plane.

Field Summary

Fields

Modifier and Type	Field	Description
private Vector3D	u	Abscissa axis of the projection plane.
private Vector3D	v	Ordinate axis of the projection plane.
private Vector3D	w	Normal of the projection plane (viewing direction).

Constructor Summary

Constructors

Constructor	Description
OutlineExtractor(Vector3D u, Vector3D v)	Build an extractor for a specific projection plane.

Method Summary

Modifier and Type	Method	Description
Vector2D[][]	getOutline(PolyhedronsSet polyhedronsSet)	Extract the outline of a polyhedrons set.
private boolean	pointIsBetween(Vector2D[] loop, int n, int i)	Check if a point is geometrically between its neighbor in an array.

Methods inherited from class Object

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

Field Details

u

private Vector3D u

Abscissa axis of the projection plane.

v

private Vector3D v

Ordinate axis of the projection plane.

w

private Vector3D w

Normal of the projection plane (viewing direction).

Constructor Details

OutlineExtractor

public OutlineExtractor(Vector3D u,
 Vector3D v)

Build an extractor for a specific projection plane.

Parameters:

u - abscissa axis of the projection point

v - ordinate axis of the projection point

Method Details

getOutline

public Vector2D[][] getOutline(PolyhedronsSet polyhedronsSet)

Extract the outline of a polyhedrons set.

Parameters:

polyhedronsSet - polyhedrons set whose outline must be extracted

Returns:

an outline, as an array of loops.

pointIsBetween

private boolean pointIsBetween(Vector2D[] loop,
 int n,
 int i)

Check if a point is geometrically between its neighbor in an array.

The neighbors are computed considering the array is a loop (i.e. point at index (n-1) is before point at index 0)

Parameters:

loop - points array

n - number of points to consider in the array

i - index of the point to check (must be between 0 and n-1)

Returns:

true if the point is exactly between its neighbors