/*
* This file is part of JGrasstools (http://www.jgrasstools.org)
* (C) HydroloGIS - www.hydrologis.com
*
* JGrasstools is free software: you can redistribute it and/or modify
* it under the terms of the GNU General Public License as published by
* the Free Software Foundation, either version 3 of the License, or
* (at your option) any later version.
*
* This program is distributed in the hope that it will be useful,
* but WITHOUT ANY WARRANTY; without even the implied warranty of
* MERCHANTABILITY or FITNESS FOR A PARTICULAR PURPOSE. See the
* GNU General Public License for more details.
*
* You should have received a copy of the GNU General Public License
* along with this program. If not, see <http://www.gnu.org/licenses/>.
*/
package org.jgrasstools.lesto.modules.utilities;
import static org.jgrasstools.gears.i18n.GearsMessages.OMSHYDRO_AUTHORCONTACTS;
import static org.jgrasstools.gears.i18n.GearsMessages.OMSHYDRO_AUTHORNAMES;
import static org.jgrasstools.gears.i18n.GearsMessages.OMSHYDRO_DRAFT;
import static org.jgrasstools.gears.i18n.GearsMessages.OMSHYDRO_LICENSE;
import java.io.File;
import java.util.ArrayList;
import java.util.List;
import oms3.annotations.Author;
import oms3.annotations.Description;
import oms3.annotations.Execute;
import oms3.annotations.In;
import oms3.annotations.Keywords;
import oms3.annotations.Label;
import oms3.annotations.License;
import oms3.annotations.Name;
import oms3.annotations.Status;
import oms3.annotations.UI;
import oms3.annotations.Unit;
import org.geotools.feature.DefaultFeatureCollection;
import org.geotools.feature.simple.SimpleFeatureBuilder;
import org.geotools.feature.simple.SimpleFeatureTypeBuilder;
import org.geotools.geometry.jts.ReferencedEnvelope3D;
import org.jgrasstools.gears.io.las.core.ALasReader;
import org.jgrasstools.gears.io.las.core.ILasHeader;
import org.jgrasstools.gears.io.las.core.LasRecord;
import org.jgrasstools.gears.libs.exceptions.ModelsIllegalargumentException;
import org.jgrasstools.gears.libs.modules.JGTConstants;
import org.jgrasstools.gears.libs.modules.JGTModel;
import org.jgrasstools.gears.utils.geometry.GeometryUtilities;
import org.jgrasstools.gears.utils.math.NumericsUtilities;
import org.opengis.feature.simple.SimpleFeature;
import org.opengis.feature.simple.SimpleFeatureType;
import org.opengis.referencing.crs.CoordinateReferenceSystem;
import com.vividsolutions.jts.geom.Coordinate;
import com.vividsolutions.jts.geom.Envelope;
import com.vividsolutions.jts.geom.Geometry;
import com.vividsolutions.jts.geom.Point;
import com.vividsolutions.jts.geom.Polygon;
import com.vividsolutions.jts.index.strtree.STRtree;
@Description("Creates a vector map of the point cloud density over a given grid.")
@Author(name = OMSHYDRO_AUTHORNAMES, contact = OMSHYDRO_AUTHORCONTACTS)
@Keywords("las, density, vector")
@Label(JGTConstants.LESTO + "/utilities")
@Name("laspointdensityextractor")
@Status(OMSHYDRO_DRAFT)
@License(OMSHYDRO_LICENSE)
public class LasPointDensityExtractor extends JGTModel {
@Description("Las file path.")
@UI(JGTConstants.FILEIN_UI_HINT)
@In
public String inFile;
@Description("The grid resolution.")
@Unit("m")
@In
public double pGridStep = 1.0;
@Description("Output vector map.")
@UI(JGTConstants.FILEOUT_UI_HINT)
@In
public String outFile;
private CoordinateReferenceSystem crs;
@Execute
public void process() throws Exception {
checkNull(inFile);
if (pGridStep <= 0) {
throw new ModelsIllegalargumentException("The grid step has to be major than 0.", this);
}
List<DensityData> densityDataList = new ArrayList<DensityData>();
final File lasFile = new File(inFile);
try (ALasReader lasReader = ALasReader.getReader(lasFile, null)) {
lasReader.open();
ILasHeader header = lasReader.getHeader();
crs = header.getCrs();
ReferencedEnvelope3D dataEnvelope = header.getDataEnvelope();
double[] xBins = NumericsUtilities.range2Bins(dataEnvelope.getMinX(), dataEnvelope.getMaxX(), pGridStep, false);
double[] yBins = NumericsUtilities.range2Bins(dataEnvelope.getMinY(), dataEnvelope.getMaxY(), pGridStep, false);
STRtree tree = new STRtree();
for( int x = 0; x < xBins.length - 1; x++ ) {
double minX = xBins[x];
double maxX = xBins[x + 1];
for( int y = 0; y < yBins.length - 1; y++ ) {
double minY = yBins[y];
double maxY = yBins[y + 1];
Envelope envelope = new Envelope(minX, maxX, minY, maxY);
DensityData densityData = new DensityData();
tree.insert(envelope, densityData);
densityDataList.add(densityData);
Polygon polygon = GeometryUtilities.createPolygonFromEnvelope(envelope);
densityData.geometry = polygon;
}
}
final long recordsCount = header.getRecordsCount();
pm.beginTask("Sorting las data...", (int) recordsCount);
while( lasReader.hasNextPoint() ) {
pm.worked(1);
final LasRecord lasDot = lasReader.getNextPoint();
final double x = lasDot.x;
final double y = lasDot.y;
final short impulse = lasDot.returnNumber;
Coordinate p = new Coordinate(x, y);
Envelope envelope = new Envelope(p);
List result = tree.query(envelope);
if (result.size() < 1)
throw new RuntimeException();
DensityData densityData = null;
if (result.size() == 1) {
densityData = (DensityData) result.get(0);
} else {
for( Object object : result ) {
densityData = (DensityData) object;
Point point = gf.createPoint(p);
if (densityData.geometry.intersects(point)) {
break;
}
}
}
densityData.imp[impulse]++; // update impulse count
densityData.imp[0]++; // update total count
}
pm.done();
}
DefaultFeatureCollection outGeodata = new DefaultFeatureCollection();
final SimpleFeatureTypeBuilder b = new SimpleFeatureTypeBuilder();
b.setName("lasdata");
b.setCRS(crs);
b.add("the_geom", Polygon.class);
b.add("imp1", Integer.class);
b.add("imp2", Integer.class);
b.add("imp3", Integer.class);
b.add("imp4", Integer.class);
b.add("imp5", Integer.class);
b.add("total", Integer.class);
final SimpleFeatureType type = b.buildFeatureType();
final SimpleFeatureBuilder builder = new SimpleFeatureBuilder(type);
for( DensityData d : densityDataList ) {
Object[] objs = {d.geometry, d.imp[1], d.imp[2], d.imp[3], d.imp[4], d.imp[5], d.imp[0]};
if (d.imp[0] > 0) {
builder.addAll(objs);
final SimpleFeature feature = builder.buildFeature(null);
outGeodata.add(feature);
}
}
dumpVector(outGeodata, outFile);
}
private static class DensityData {
/**
* contains the count of [total, imp1, imp2, imp3, imp4, imp5]
*/
int[] imp = new int[6];
Geometry geometry;
}
}