bundles/common/org.eclipse.apogy.common.geometry.data3d/src-gen-custom/org/eclipse/apogy/common/geometry/data3d/impl/DigitalElevationMapMesherCustomImpl.java

/*******************************************************************************
 * Copyright (c) 2018 Agence spatiale canadienne / Canadian Space Agency 
 * All rights reserved. This program and the accompanying materials
 * are made available under the terms of the Eclipse Public License v1.0
 * which accompanies this distribution, and is available at
 * http://www.eclipse.org/legal/epl-v10.html
 *
 * Contributors:
 *     Pierre Allard, 
 *     Regent L'Archeveque - initial API and implementation
 *     
 * SPDX-License-Identifier: EPL-1.0
 *     
 *******************************************************************************/
package org.eclipse.apogy.common.geometry.data3d.impl;

import java.util.ArrayList;
import java.util.List;

import org.eclipse.apogy.common.geometry.data3d.ApogyCommonGeometryData3DFacade;
import org.eclipse.apogy.common.geometry.data3d.ApogyCommonGeometryData3DFactory;
import org.eclipse.apogy.common.geometry.data3d.CartesianPositionCoordinates;
import org.eclipse.apogy.common.geometry.data3d.CartesianTriangle;
import org.eclipse.apogy.common.geometry.data3d.CartesianTriangularMesh;
import org.eclipse.apogy.common.geometry.data3d.DigitalElevationMap;

public class DigitalElevationMapMesherCustomImpl extends DigitalElevationMapMesherImpl {
	@Override
	public CartesianTriangularMesh process(DigitalElevationMap input) throws Exception {
		CartesianTriangularMesh result = ApogyCommonGeometryData3DFactory.eINSTANCE.createCartesianTriangularMesh();

		// Copies the points to the mesh.
		List<CartesianPositionCoordinates> points = new ArrayList<CartesianPositionCoordinates>();
		for (CartesianPositionCoordinates p : input.getPoints()) {
			CartesianPositionCoordinates copy = ApogyCommonGeometryData3DFacade.INSTANCE
					.createCartesianPositionCoordinates(p);
			points.add(copy);
		}
		result.getPoints().addAll(points);

		// Creates the point array that map the data as a grid.
		CartesianPositionCoordinates[][] array = createPointsArray(result.getPoints(), input.getXDimension(),
				input.getYDimension());
		List<CartesianTriangle> triangles = new ArrayList<CartesianTriangle>();

		for (int ym = 0; ym < input.getYDimension() - 1; ym++) {
			for (int xn = 0; xn < input.getXDimension() - 1; xn++) {
				CartesianPositionCoordinates pa = array[xn][ym];
				CartesianPositionCoordinates pb = array[xn + 1][ym];
				CartesianPositionCoordinates pc = array[xn + 1][ym + 1];
				CartesianPositionCoordinates pd = array[xn][ym + 1];

				CartesianTriangle t1 = ApogyCommonGeometryData3DFacade.INSTANCE.createCartesianTriangle(pa, pb, pc);
				triangles.add(t1);

				CartesianTriangle t2 = ApogyCommonGeometryData3DFacade.INSTANCE.createCartesianTriangle(pa, pc, pd);
				triangles.add(t2);
			}
		}
		result.getPolygons().addAll(triangles);

		return result;
	}

	private CartesianPositionCoordinates[][] createPointsArray(List<CartesianPositionCoordinates> points,
			int xDimension, int yDimension) {
		CartesianPositionCoordinates[][] array = new CartesianPositionCoordinates[xDimension][yDimension];

		for (int i = 0; i < xDimension; i++) {
			int startIndex = i * yDimension;

			for (int j = 0; j < yDimension; j++) {
				array[i][j] = points.get(startIndex + j);
			}
		}

		return array;
	}
} // DigitalElevationMapMesherImpl