org.jgrasstools.gears.utils.features.FastLiteShape Maven / Gradle / Ivy
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package org.jgrasstools.gears.utils.features;
import java.awt.geom.AffineTransform;
import java.awt.geom.Point2D;
import java.awt.geom.Rectangle2D;
import org.geotools.geometry.jts.LiteCoordinateSequence;
import org.geotools.geometry.jts.LiteShape;
import com.vividsolutions.jts.geom.Geometry;
import com.vividsolutions.jts.geom.GeometryFactory;
import com.vividsolutions.jts.geom.Point;
import com.vividsolutions.jts.geom.Polygon;
import com.vividsolutions.jts.geom.prep.PreparedGeometry;
import com.vividsolutions.jts.geom.prep.PreparedGeometryFactory;
/**
* A {@link LiteShape} subclass using PreparedGeometry to compute the results of the containment
* methods. This class is _not_ thread safe
*
* @author Andrea Aime - GeoSolutions
*
*/
public final class FastLiteShape extends LiteShape {
PreparedGeometry prepared;
LiteCoordinateSequence pointCS;
Point point;
LiteCoordinateSequence rectCS;
Polygon rect;
public FastLiteShape( Geometry geom ) {
super(geom, new AffineTransform(), false);
this.prepared = PreparedGeometryFactory.prepare(geom);
GeometryFactory gf = new GeometryFactory();
pointCS = new LiteCoordinateSequence(1, 2);
point = gf.createPoint(pointCS);
rectCS = new LiteCoordinateSequence(5, 2);
rect = gf.createPolygon(gf.createLinearRing(rectCS), null);
// System.out.println("Crop area: " + geom);
}
@Override
public boolean contains( double x, double y ) {
pointCS.setX(0, x);
pointCS.setY(0, y);
point.geometryChanged();
final boolean result = prepared.contains(point);
// System.out.println("Poking " + x + ", " + y + " -> " + result);
return result;
}
@Override
public boolean contains( Point2D p ) {
return contains(p.getX(), p.getY());
}
@Override
public boolean contains( double x, double y, double w, double h ) {
updateRect(x, y, w, h);
return prepared.contains(rect);
}
private void updateRect( double x, double y, double w, double h ) {
rectCS.setX(0, x);
rectCS.setY(0, y);
rectCS.setX(1, x + w);
rectCS.setY(1, y);
rectCS.setX(2, x + w);
rectCS.setY(2, y + h);
rectCS.setX(3, x);
rectCS.setY(3, y + h);
rectCS.setX(4, x);
rectCS.setY(4, y);
rect.geometryChanged();
}
@Override
public boolean contains( Rectangle2D r ) {
return contains(r.getX(), r.getY(), r.getWidth(), r.getHeight());
}
@Override
public boolean intersects( double x, double y, double w, double h ) {
updateRect(x, y, w, h);
return prepared.intersects(rect);
}
@Override
public boolean intersects( Rectangle2D r ) {
return contains(r.getX(), r.getY(), r.getWidth(), r.getHeight());
}
}