/*
* Copyright (c) 2016 Vivid Solutions.
*
* All rights reserved. This program and the accompanying materials
* are made available under the terms of the Eclipse Public License v1.0
* and Eclipse Distribution License v. 1.0 which accompanies this distribution.
* The Eclipse Public License is available at http://www.eclipse.org/legal/epl-v10.html
* and the Eclipse Distribution License is available at
*
* http://www.eclipse.org/org/documents/edl-v10.php.
*/
package org.locationtech.jts.operation;
import org.locationtech.jts.algorithm.BoundaryNodeRule;
import org.locationtech.jts.algorithm.LineIntersector;
import org.locationtech.jts.algorithm.RobustLineIntersector;
import org.locationtech.jts.geom.Geometry;
import org.locationtech.jts.geom.PrecisionModel;
import org.locationtech.jts.geomgraph.GeometryGraph;
/**
* The base class for operations that require {@link GeometryGraph}s.
*
* @version 1.7
*/
public class GeometryGraphOperation
{
protected final LineIntersector li = new RobustLineIntersector();
protected PrecisionModel resultPrecisionModel;
/**
* The operation args into an array so they can be accessed by index
*/
protected GeometryGraph[] arg; // the arg(s) of the operation
public GeometryGraphOperation(Geometry g0, Geometry g1)
{
this(g0, g1,
BoundaryNodeRule.OGC_SFS_BOUNDARY_RULE
// BoundaryNodeRule.ENDPOINT_BOUNDARY_RULE
);
}
public GeometryGraphOperation(Geometry g0, Geometry g1, BoundaryNodeRule boundaryNodeRule)
{
// use the most precise model for the result
if (g0.getPrecisionModel().compareTo(g1.getPrecisionModel()) >= 0)
setComputationPrecision(g0.getPrecisionModel());
else
setComputationPrecision(g1.getPrecisionModel());
arg = new GeometryGraph[2];
arg[0] = new GeometryGraph(0, g0, boundaryNodeRule);
arg[1] = new GeometryGraph(1, g1, boundaryNodeRule);
}
public GeometryGraphOperation(Geometry g0) {
setComputationPrecision(g0.getPrecisionModel());
arg = new GeometryGraph[1];
arg[0] = new GeometryGraph(0, g0);;
}
public Geometry getArgGeometry(int i) { return arg[i].getGeometry(); }
protected void setComputationPrecision(PrecisionModel pm)
{
resultPrecisionModel = pm;
li.setPrecisionModel(resultPrecisionModel);
}
}