/*
* The JTS Topology Suite is a collection of Java classes that
* implement the fundamental operations required to validate a given
* geo-spatial data set to a known topological specification.
*
* Copyright (C) 2001 Vivid Solutions
*
* This library is free software; you can redistribute it and/or
* modify it under the terms of the GNU Lesser General Public
* License as published by the Free Software Foundation; either
* version 2.1 of the License, or (at your option) any later version.
*
* This library 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
* Lesser General Public License for more details.
*
* You should have received a copy of the GNU Lesser General Public
* License along with this library; if not, write to the Free Software
* Foundation, Inc., 59 Temple Place, Suite 330, Boston, MA 02111-1307 USA
*
* For more information, contact:
*
* Vivid Solutions
* Suite #1A
* 2328 Government Street
* Victoria BC V8T 5G5
* Canada
*
* (250)385-6040
* www.vividsolutions.com
*/
package com.vividsolutions.jts.operation.distance3d;
import com.vividsolutions.jts.geom.Coordinate;
import com.vividsolutions.jts.geom.CoordinateSequence;
import com.vividsolutions.jts.geom.Envelope;
/**
* A CoordinateSequence wrapper which
* projects 3D coordinates into one of the
* three Cartesian axis planes,
* using the standard orthonormal projection
* (i.e. simply selecting the appropriate ordinates into the XY ordinates).
* The projected data is represented as 2D coordinates.
*
* @author mdavis
*
*/
public class AxisPlaneCoordinateSequence implements CoordinateSequence {
/**
* Creates a wrapper projecting to the XY plane.
*
* @param seq the sequence to be projected
* @return a sequence which projects coordinates
*/
public static CoordinateSequence projectToXY(CoordinateSequence seq)
{
/**
* This is just a no-op, but return a wrapper
* to allow better testing
*/
return new AxisPlaneCoordinateSequence(seq, XY_INDEX);
}
/**
* Creates a wrapper projecting to the XZ plane.
*
* @param seq the sequence to be projected
* @return a sequence which projects coordinates
*/
public static CoordinateSequence projectToXZ(CoordinateSequence seq)
{
return new AxisPlaneCoordinateSequence(seq, XZ_INDEX);
}
/**
* Creates a wrapper projecting to the YZ plane.
*
* @param seq the sequence to be projected
* @return a sequence which projects coordinates
*/
public static CoordinateSequence projectToYZ(CoordinateSequence seq)
{
return new AxisPlaneCoordinateSequence(seq, YZ_INDEX);
}
private static int[] XY_INDEX = new int[] { 0,1 };
private static int[] XZ_INDEX = new int[] { 0,2 };
private static int[] YZ_INDEX = new int[] { 1,2 };
private CoordinateSequence seq;
private int[] indexMap;
private AxisPlaneCoordinateSequence(CoordinateSequence seq, int[] indexMap) {
this.seq = seq;
this.indexMap = indexMap;
}
public int getDimension() {
return 2;
}
public Coordinate getCoordinate(int i) {
return getCoordinateCopy(i);
}
public Coordinate getCoordinateCopy(int i) {
return new Coordinate(getX(i), getY(i), getZ(i));
}
public void getCoordinate(int index, Coordinate coord) {
coord.x = getOrdinate(index, X);
coord.y = getOrdinate(index, Y);
coord.z = getOrdinate(index, Z);
}
public double getX(int index) {
return getOrdinate(index, X);
}
public double getY(int index) {
return getOrdinate(index, Y);
}
public double getZ(int index) {
return getOrdinate(index, Z);
}
public double getOrdinate(int index, int ordinateIndex) {
// Z ord is always 0
if (ordinateIndex > 1) return 0;
return seq.getOrdinate(index, indexMap[ordinateIndex]);
}
public int size() {
return seq.size();
}
public void setOrdinate(int index, int ordinateIndex, double value) {
throw new UnsupportedOperationException();
}
public Coordinate[] toCoordinateArray() {
throw new UnsupportedOperationException();
}
public Envelope expandEnvelope(Envelope env) {
throw new UnsupportedOperationException();
}
public Object clone()
{
throw new UnsupportedOperationException();
}
}