geos::triangulate::IncrementalDelaunayTriangulator Class Reference

Computes a Delauanay Triangulation of a set of quadedge::Vertexes, using an incrementatal insertion algorithm. More...

#include <IncrementalDelaunayTriangulator.h>

Public Types
typedef std::vector< quadedge::Vertex >	VertexList

Public Member Functions
	IncrementalDelaunayTriangulator (quadedge::QuadEdgeSubdivision *subdiv)
void	forceConvex (bool isForceConvex)
void	insertSites (const VertexList &vertices)
quadedge::QuadEdge &	insertSite (const quadedge::Vertex &v)

Detailed Description

Computes a Delauanay Triangulation of a set of quadedge::Vertexes, using an incrementatal insertion algorithm.

Author

JTS: Martin Davis

Benjamin Campbell

Constructor & Destructor Documentation

IncrementalDelaunayTriangulator()

geos::triangulate::IncrementalDelaunayTriangulator::IncrementalDelaunayTriangulator

(

quadedge::QuadEdgeSubdivision *

subdiv

)

Creates a new triangulator using the given quadedge::QuadEdgeSubdivision. The triangulator uses the tolerance of the supplied subdivision.

Parameters

subdiv

a subdivision in which to build the TIN

Member Function Documentation

forceConvex()

void geos::triangulate::IncrementalDelaunayTriangulator::forceConvex

(

bool

isForceConvex

)

Sets whether the triangulation is forced to have a convex boundary. Because of the use of a finite-size frame, this condition requires special logic to enforce. The default is true, since this is a requirement for some uses of Delaunay Triangulations (such as Concave Hull generation). However, forcing the triangulation boundary to be convex may cause the overall frame triangulation to be non-Delaunay. This can cause a problem for Voronoi generation, so the logic can be disabled via this method.

Parameters

isForceConvex

true if the triangulation boundary is forced to be convex

insertSite()

quadedge::QuadEdge& geos::triangulate::IncrementalDelaunayTriangulator::insertSite

(

const quadedge::Vertex &

v

)

Inserts a new point into a subdivision representing a Delaunay triangulation, and fixes the affected edges so that the result is still a Delaunay triangulation.

Returns

a quadedge containing the inserted vertex

insertSites()

void geos::triangulate::IncrementalDelaunayTriangulator::insertSites

(

const VertexList &

vertices

)

Inserts all sites in a collection. The inserted vertices MUST be unique up to the provided tolerance value. (i.e. no two vertices should be closer than the provided tolerance value). They do not have to be rounded to the tolerance grid, however.

Parameters

vertices

a Collection of Vertex

Exceptions

LocateFailureException

if the location algorithm fails to converge in a reasonable number of iterations

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The documentation for this class was generated from the following file:

• IncrementalDelaunayTriangulator.h