ClipFunctions.java
/*
* Copyright (c) 2019 Martin Davis.
*
* All rights reserved. This program and the accompanying materials
* are made available under the terms of the Eclipse Public License 2.0
* and Eclipse Distribution License v. 1.0 which accompanies this distribution.
* The Eclipse Public License is available at http://www.eclipse.org/legal/epl-v20.html
* and the Eclipse Distribution License is available at
*
* http://www.eclipse.org/org/documents/edl-v10.php.
*/
package org.locationtech.jtslab;
import org.locationtech.jts.geom.Envelope;
import org.locationtech.jts.geom.Geometry;
import org.locationtech.jts.geom.PrecisionModel;
import org.locationtech.jtslab.clip.RectangleClipPolygon;
public class ClipFunctions {
public static Geometry clipPoly(Geometry geom, Geometry rectangle) {
return RectangleClipPolygon.clip(geom, rectangle);
}
public static Geometry clipPolyPrecise(Geometry geom, Geometry rectangle, double scaleFactor) {
return RectangleClipPolygon.clip(geom, rectangle, new PrecisionModel(scaleFactor));
}
public static Geometry clipByIntersection(Geometry geom, Geometry rectangle) {
// short-circuit check
Envelope rectEnv = rectangle.getEnvelopeInternal();
if (rectEnv.contains(geom.getEnvelopeInternal())) return geom.copy();
return rectangle.intersection(geom);
}
public static Geometry clipByIntersectionOpt(Geometry geom, Geometry rectangle) {
// short-circuit check
Envelope rectEnv = rectangle.getEnvelopeInternal();
if (rectEnv.contains(geom.getEnvelopeInternal())) return geom.copy();
if (! rectangle.intersects(geom)) return null;
return rectangle.intersection(geom);
}
}