/*
* 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 test.jts.perf.operation.buffer;
import org.locationtech.jts.geom.Geometry;
import org.locationtech.jts.geom.GeometryFactory;
import org.locationtech.jts.geom.PrecisionModel;
import org.locationtech.jts.io.WKTReader;
import org.locationtech.jts.operation.buffer.validate.BufferResultValidator;
/**
* Test buffers generated around set of random linestrings.
* Intended to stress-test the correctness of buffer generation.
* The random linestring sets tend to have numerous holes when buffered,
* which is a good test.
*
* @version 1.7
*/
public class RandomLineBufferStressTest
{
private PrecisionModel precisionModel = new PrecisionModel();
private GeometryFactory geometryFactory = new GeometryFactory(precisionModel, 0);
WKTReader rdr = new WKTReader(geometryFactory);
public static void main(String args[]) {
try {
(new RandomLineBufferStressTest()).run();
}
catch (Exception ex) {
ex.printStackTrace();
}
}
public RandomLineBufferStressTest() { }
void run()
throws Exception
{
while (true) {
run(10);
run(100);
run(200);
}
}
void run(int numPts)
throws Exception
{
double lineScale = 1.0;
Geometry line = RandomOffsetLineStringGenerator.generate(lineScale, numPts, geometryFactory);
System.out.println();
System.out.println(line);
runCase(line, 10, lineScale, numPts);
runCase(line, 1, lineScale, numPts);
runCase(line, .1, lineScale, numPts);
}
private int caseCount = 0;
void runCase(Geometry line, double dist, double lineScale, int numPts)
throws Exception
{
caseCount++;
System.out.println("Running case " + caseCount
+ " (line scale = " + lineScale
+ " buffer dist = " + dist
+ " num pts = " + numPts
+ " )");
checkBuffer(line, dist);
}
void checkBuffer(Geometry g, double distance)
{
Geometry buf = g.buffer(distance);
String isValidMsg = BufferResultValidator.isValidMsg(g, distance, buf);
if (isValidMsg != null) {
System.out.println("Input: ");
System.out.println(g);
System.out.println("Buffer: ");
System.out.println(buf);
throw new IllegalStateException(isValidMsg);
}
}
}