org.locationtech.jts.triangulate

Class ConformingDelaunayTriangulationBuilder

java.lang.Object

org.locationtech.jts.triangulate.ConformingDelaunayTriangulationBuilder

public class ConformingDelaunayTriangulationBuilder
extends Object

A utility class which creates Conforming Delaunay Triangulations from collections of points and linear constraints, and extract the resulting triangulation edges or triangles as geometries.

Author:

Martin Davis

Constructor Summary

Constructors

Constructor and Description
ConformingDelaunayTriangulationBuilder()

Method Summary

Modifier and Type	Method and Description
Geometry	getEdges(GeometryFactory geomFact) Gets the edges of the computed triangulation as a MultiLineString.
QuadEdgeSubdivision	getSubdivision() Gets the QuadEdgeSubdivision which models the computed triangulation.
Geometry	getTriangles(GeometryFactory geomFact) Gets the faces of the computed triangulation as a GeometryCollection of Polygon.
void	setConstraints(Geometry constraintLines) Sets the linear constraints to be conformed to.
void	setSites(Geometry geom) Sets the sites (point or vertices) which will be triangulated.
void	setTolerance(double tolerance) Sets the snapping tolerance which will be used to improved the robustness of the triangulation computation.

Methods inherited from class java.lang.Object

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

Constructor Detail

ConformingDelaunayTriangulationBuilder

public ConformingDelaunayTriangulationBuilder()

Method Detail

setSites

public void setSites(Geometry geom)

Sets the sites (point or vertices) which will be triangulated. All vertices of the given geometry will be used as sites. The site vertices do not have to contain the constraint vertices as well; any site vertices which are identical to a constraint vertex will be removed from the site vertex set.

Parameters:

geom - the geometry from which the sites will be extracted.

setConstraints

public void setConstraints(Geometry constraintLines)

Sets the linear constraints to be conformed to. All linear components in the input will be used as constraints. The constraint vertices do not have to be disjoint from the site vertices. The constraints must not contain duplicate segments (up to orientation).

Parameters:

constraintLines - the lines to constraint to

setTolerance

public void setTolerance(double tolerance)

Sets the snapping tolerance which will be used to improved the robustness of the triangulation computation. A tolerance of 0.0 specifies that no snapping will take place.

Parameters:

tolerance - the tolerance distance to use

getSubdivision

public QuadEdgeSubdivision getSubdivision()

Gets the QuadEdgeSubdivision which models the computed triangulation.

Returns:

the subdivision containing the triangulation

getEdges

public Geometry getEdges(GeometryFactory geomFact)

Gets the edges of the computed triangulation as a MultiLineString.

Parameters:

geomFact - the geometry factory to use to create the output

Returns:

the edges of the triangulation

getTriangles

public Geometry getTriangles(GeometryFactory geomFact)

Gets the faces of the computed triangulation as a GeometryCollection of Polygon.

Parameters:

geomFact - the geometry factory to use to create the output

Returns:

the faces of the triangulation