Java tutorial
/* * Java Terrain and Stellar System Ports * * Copyright (C) 2006 Martin H. Smith based on work by original * authors. * * Released under the terms of the GNU General Public License * * This program 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 2 * 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, write to the Free Software * Foundation, Inc., 51 Franklin Street, Fifth Floor, Boston, * MA 02110-1301, USA. * * Linking TerraJ statically or dynamically with other modules is making a * combined work based on TerraJ. Thus, the terms and conditions of the * GNU General Public License cover the whole combination. * * In addition, as a special exception, the copyright holders of TerraJ * give you permission to combine this program with free software programs * or libraries that are released under the GNU LGPL and with code included * in the standard release of JOGL, Java Getopt and FreeMarker under the BSD * license (or modified versions of such code, with unchanged license) and with * Apache Commons and Log4J libraries under the Apache license (or modified versions * of such code. You may copy and distribute such a system following the terms * of the GNU GPL for TerraJ and the licenses of the other code concerned, * provided that you include the source code of that other code when and as the * GNU GPL requires distribution of source code. * * Note that people who make modified versions of TerraJ are not obligated to grant * this special exception for their modified versions; it is their choice whether * to do so. The GNU General Public License gives permission to release a modified * version without this exception; this exception also makes it possible to release * a modified version which carries forward this exception. */ /* * TriangleMeshFlat.java * * Created on 19 April 2006, 08:35 */ package com.alvermont.terraj.fracplanet.geom; import com.alvermont.terraj.fracplanet.util.Progress; import com.alvermont.terraj.stargen.util.MathUtils; import org.apache.commons.logging.Log; import org.apache.commons.logging.LogFactory; /** * A mesh representing a flat terrain. Note flat refers to the geometry in * use. Obviously the terrain itself isn't entirely flat! * * @author martin * @version $Id: TriangleMeshFlat.java,v 1.4 2006/07/06 06:58:35 martin Exp $ */ public class TriangleMeshFlat extends TriangleMeshCloud { /** Our logger object */ private static Log log = LogFactory.getLog(TriangleMeshFlat.class); /** * An enum that represents the different types of terrain this class * can create */ public enum FlatTerrainType { /** Enum constant for a triangular 'flat' terrain */ TRIANGLE, /** Enum constant for a square 'flat' terrain */ SQUARE, /** Enum constant for a hexagonal 'flat' terrain */ HEXAGON; } /** * Creates a new instance of TriangleMeshFlat * * @param ttype The type of terrain to be generated (triangle, square, hexagon) * * @param z The Z distance of the terrain from the origin * @param utils The math object with the seeded random number generator * @param progress The progress object to be used * @param geometry The geometry object to be used */ public TriangleMeshFlat(FlatTerrainType ttype, float z, MathUtils utils, Progress progress, Geometry geometry) { super(progress, geometry); this.ttype = ttype; this.z = z; buildMesh(); } /** * Create the mesh object */ protected void buildMesh() { switch (this.ttype) { case TRIANGLE: for (int i = 0; i < 3; ++i) { addVertex(new SimpleVertex(new SimpleXYZ((float) Math.cos(i * 2.0 * Math.PI / 3.0), (float) Math.sin(i * 2.0 * Math.PI / 3.0), z))); } addTriangle(new SimpleTriangle(0, 1, 2)); break; case SQUARE: addVertex(new SimpleVertex(new SimpleXYZ(0.0f, 0.0f, z))); for (int i = 0; i < 4; ++i) { addVertex(new SimpleVertex(new SimpleXYZ((float) Math.cos(i * Math.PI / 2.0), (float) Math.sin(i * Math.PI / 2.0), z))); } for (int i = 0; i < 4; ++i) { addTriangle(new SimpleTriangle(0, 1 + i, 1 + (i + 1) % 4)); } break; case HEXAGON: default: addVertex(new SimpleVertex(new SimpleXYZ(0.0f, 0.0f, z))); for (int i = 0; i < 6; ++i) { addVertex(new SimpleVertex(new SimpleXYZ((float) Math.cos(i * Math.PI / 3.0), (float) Math.sin(i * Math.PI / 3.0), z))); } for (int i = 0; i < 6; ++i) { addTriangle(new SimpleTriangle(0, 1 + i, 1 + (i + 1) % 6)); } break; } } /** * Holds value of property ttype. */ private FlatTerrainType ttype; /** * Getter for property ttype. * @return Value of property ttype. */ public FlatTerrainType getTtype() { return this.ttype; } /** * Holds value of property z. */ private float z; /** * Getter for property z. * @return Value of property z. */ public float getZ() { return this.z; } /** * Setter for property z. * @param z New value of property z. */ public void setZ(float z) { this.z = z; } }