com.vividsolutions.jts.triangulate

Class ConformingDelaunayTriangulationBuilder


  • public class ConformingDelaunayTriangulationBuilder
extends Object
    A utility class which creates Conforming Delaunay Trianglulations from collections of points and linear constraints, and extract the resulting triangulation edges or triangles as geometries.

    • 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