159b2e6871c65f58fdad78cd7229c292f6a177578Scott Barta/* 259b2e6871c65f58fdad78cd7229c292f6a177578Scott Barta * Copyright (c) 2009-2010 jMonkeyEngine 359b2e6871c65f58fdad78cd7229c292f6a177578Scott Barta * All rights reserved. 459b2e6871c65f58fdad78cd7229c292f6a177578Scott Barta * 559b2e6871c65f58fdad78cd7229c292f6a177578Scott Barta * Redistribution and use in source and binary forms, with or without 659b2e6871c65f58fdad78cd7229c292f6a177578Scott Barta * modification, are permitted provided that the following conditions are 759b2e6871c65f58fdad78cd7229c292f6a177578Scott Barta * met: 859b2e6871c65f58fdad78cd7229c292f6a177578Scott Barta * 959b2e6871c65f58fdad78cd7229c292f6a177578Scott Barta * * Redistributions of source code must retain the above copyright 1059b2e6871c65f58fdad78cd7229c292f6a177578Scott Barta * notice, this list of conditions and the following disclaimer. 1159b2e6871c65f58fdad78cd7229c292f6a177578Scott Barta * 1259b2e6871c65f58fdad78cd7229c292f6a177578Scott Barta * * Redistributions in binary form must reproduce the above copyright 1359b2e6871c65f58fdad78cd7229c292f6a177578Scott Barta * notice, this list of conditions and the following disclaimer in the 1459b2e6871c65f58fdad78cd7229c292f6a177578Scott Barta * documentation and/or other materials provided with the distribution. 1559b2e6871c65f58fdad78cd7229c292f6a177578Scott Barta * 1659b2e6871c65f58fdad78cd7229c292f6a177578Scott Barta * * Neither the name of 'jMonkeyEngine' nor the names of its contributors 1759b2e6871c65f58fdad78cd7229c292f6a177578Scott Barta * may be used to endorse or promote products derived from this software 1859b2e6871c65f58fdad78cd7229c292f6a177578Scott Barta * without specific prior written permission. 1959b2e6871c65f58fdad78cd7229c292f6a177578Scott Barta * 2059b2e6871c65f58fdad78cd7229c292f6a177578Scott Barta * THIS SOFTWARE IS PROVIDED BY THE COPYRIGHT HOLDERS AND CONTRIBUTORS 2159b2e6871c65f58fdad78cd7229c292f6a177578Scott Barta * "AS IS" AND ANY EXPRESS OR IMPLIED WARRANTIES, INCLUDING, BUT NOT LIMITED 2259b2e6871c65f58fdad78cd7229c292f6a177578Scott Barta * TO, THE IMPLIED WARRANTIES OF MERCHANTABILITY AND FITNESS FOR A PARTICULAR 2359b2e6871c65f58fdad78cd7229c292f6a177578Scott Barta * PURPOSE ARE DISCLAIMED. IN NO EVENT SHALL THE COPYRIGHT OWNER OR 2459b2e6871c65f58fdad78cd7229c292f6a177578Scott Barta * CONTRIBUTORS BE LIABLE FOR ANY DIRECT, INDIRECT, INCIDENTAL, SPECIAL, 2559b2e6871c65f58fdad78cd7229c292f6a177578Scott Barta * EXEMPLARY, OR CONSEQUENTIAL DAMAGES (INCLUDING, BUT NOT LIMITED TO, 2659b2e6871c65f58fdad78cd7229c292f6a177578Scott Barta * PROCUREMENT OF SUBSTITUTE GOODS OR SERVICES; LOSS OF USE, DATA, OR 2759b2e6871c65f58fdad78cd7229c292f6a177578Scott Barta * PROFITS; OR BUSINESS INTERRUPTION) HOWEVER CAUSED AND ON ANY THEORY OF 2859b2e6871c65f58fdad78cd7229c292f6a177578Scott Barta * LIABILITY, WHETHER IN CONTRACT, STRICT LIABILITY, OR TORT (INCLUDING 2959b2e6871c65f58fdad78cd7229c292f6a177578Scott Barta * NEGLIGENCE OR OTHERWISE) ARISING IN ANY WAY OUT OF THE USE OF THIS 3059b2e6871c65f58fdad78cd7229c292f6a177578Scott Barta * SOFTWARE, EVEN IF ADVISED OF THE POSSIBILITY OF SUCH DAMAGE. 3159b2e6871c65f58fdad78cd7229c292f6a177578Scott Barta */ 3259b2e6871c65f58fdad78cd7229c292f6a177578Scott Barta 3359b2e6871c65f58fdad78cd7229c292f6a177578Scott Bartapackage com.jme3.scene.mesh; 3459b2e6871c65f58fdad78cd7229c292f6a177578Scott Barta 3559b2e6871c65f58fdad78cd7229c292f6a177578Scott Bartaimport com.jme3.util.BufferUtils; 3659b2e6871c65f58fdad78cd7229c292f6a177578Scott Bartaimport java.nio.Buffer; 3759b2e6871c65f58fdad78cd7229c292f6a177578Scott Barta 3859b2e6871c65f58fdad78cd7229c292f6a177578Scott Barta/** 3959b2e6871c65f58fdad78cd7229c292f6a177578Scott Barta * <code>IndexBuffer</code> is an abstraction for integer index buffers, 4059b2e6871c65f58fdad78cd7229c292f6a177578Scott Barta * it is used to retrieve indices without knowing in which format they 4159b2e6871c65f58fdad78cd7229c292f6a177578Scott Barta * are stored (ushort or uint). 4259b2e6871c65f58fdad78cd7229c292f6a177578Scott Barta * 4359b2e6871c65f58fdad78cd7229c292f6a177578Scott Barta * @author lex 4459b2e6871c65f58fdad78cd7229c292f6a177578Scott Barta */ 4559b2e6871c65f58fdad78cd7229c292f6a177578Scott Bartapublic abstract class IndexBuffer { 4659b2e6871c65f58fdad78cd7229c292f6a177578Scott Barta 4759b2e6871c65f58fdad78cd7229c292f6a177578Scott Barta /** 4859b2e6871c65f58fdad78cd7229c292f6a177578Scott Barta * Creates an index buffer that can contain the given amount 4959b2e6871c65f58fdad78cd7229c292f6a177578Scott Barta * of vertices. 5059b2e6871c65f58fdad78cd7229c292f6a177578Scott Barta * Returns {@link IndexShortBuffer} 5159b2e6871c65f58fdad78cd7229c292f6a177578Scott Barta * 5259b2e6871c65f58fdad78cd7229c292f6a177578Scott Barta * @param vertexCount The amount of vertices to contain 5359b2e6871c65f58fdad78cd7229c292f6a177578Scott Barta * @param indexCount The amount of indices 5459b2e6871c65f58fdad78cd7229c292f6a177578Scott Barta * to contain. 5559b2e6871c65f58fdad78cd7229c292f6a177578Scott Barta * @return A new index buffer 5659b2e6871c65f58fdad78cd7229c292f6a177578Scott Barta */ 5759b2e6871c65f58fdad78cd7229c292f6a177578Scott Barta public static IndexBuffer createIndexBuffer(int vertexCount, int indexCount){ 5859b2e6871c65f58fdad78cd7229c292f6a177578Scott Barta if (vertexCount > 65535){ 5959b2e6871c65f58fdad78cd7229c292f6a177578Scott Barta return new IndexIntBuffer(BufferUtils.createIntBuffer(indexCount)); 6059b2e6871c65f58fdad78cd7229c292f6a177578Scott Barta }else{ 6159b2e6871c65f58fdad78cd7229c292f6a177578Scott Barta return new IndexShortBuffer(BufferUtils.createShortBuffer(indexCount)); 6259b2e6871c65f58fdad78cd7229c292f6a177578Scott Barta } 6359b2e6871c65f58fdad78cd7229c292f6a177578Scott Barta } 6459b2e6871c65f58fdad78cd7229c292f6a177578Scott Barta 6559b2e6871c65f58fdad78cd7229c292f6a177578Scott Barta /** 6659b2e6871c65f58fdad78cd7229c292f6a177578Scott Barta * Returns the vertex index for the given index in the index buffer. 6759b2e6871c65f58fdad78cd7229c292f6a177578Scott Barta * 6859b2e6871c65f58fdad78cd7229c292f6a177578Scott Barta * @param i The index inside the index buffer 6959b2e6871c65f58fdad78cd7229c292f6a177578Scott Barta * @return 7059b2e6871c65f58fdad78cd7229c292f6a177578Scott Barta */ 7159b2e6871c65f58fdad78cd7229c292f6a177578Scott Barta public abstract int get(int i); 7259b2e6871c65f58fdad78cd7229c292f6a177578Scott Barta 7359b2e6871c65f58fdad78cd7229c292f6a177578Scott Barta /** 7459b2e6871c65f58fdad78cd7229c292f6a177578Scott Barta * Puts the vertex index at the index buffer's index. 7559b2e6871c65f58fdad78cd7229c292f6a177578Scott Barta * Implementations may throw an {@link UnsupportedOperationException} 7659b2e6871c65f58fdad78cd7229c292f6a177578Scott Barta * if modifying the IndexBuffer is not supported (e.g. virtual index 7759b2e6871c65f58fdad78cd7229c292f6a177578Scott Barta * buffers). 7859b2e6871c65f58fdad78cd7229c292f6a177578Scott Barta */ 7959b2e6871c65f58fdad78cd7229c292f6a177578Scott Barta public abstract void put(int i, int value); 8059b2e6871c65f58fdad78cd7229c292f6a177578Scott Barta 8159b2e6871c65f58fdad78cd7229c292f6a177578Scott Barta /** 8259b2e6871c65f58fdad78cd7229c292f6a177578Scott Barta * Returns the size of the index buffer. 8359b2e6871c65f58fdad78cd7229c292f6a177578Scott Barta * 8459b2e6871c65f58fdad78cd7229c292f6a177578Scott Barta * @return the size of the index buffer. 8559b2e6871c65f58fdad78cd7229c292f6a177578Scott Barta */ 8659b2e6871c65f58fdad78cd7229c292f6a177578Scott Barta public abstract int size(); 8759b2e6871c65f58fdad78cd7229c292f6a177578Scott Barta 8859b2e6871c65f58fdad78cd7229c292f6a177578Scott Barta /** 8959b2e6871c65f58fdad78cd7229c292f6a177578Scott Barta * Returns the underlying data-type specific {@link Buffer}. 9059b2e6871c65f58fdad78cd7229c292f6a177578Scott Barta * Implementations may return null if there's no underlying 9159b2e6871c65f58fdad78cd7229c292f6a177578Scott Barta * buffer. 9259b2e6871c65f58fdad78cd7229c292f6a177578Scott Barta * 9359b2e6871c65f58fdad78cd7229c292f6a177578Scott Barta * @return the underlying {@link Buffer}. 9459b2e6871c65f58fdad78cd7229c292f6a177578Scott Barta */ 9559b2e6871c65f58fdad78cd7229c292f6a177578Scott Barta public abstract Buffer getBuffer(); 9659b2e6871c65f58fdad78cd7229c292f6a177578Scott Barta} 97