1 /* 2 * Copyright (c) 2009-2010 jMonkeyEngine 3 * All rights reserved. 4 * 5 * Redistribution and use in source and binary forms, with or without 6 * modification, are permitted provided that the following conditions are 7 * met: 8 * 9 * * Redistributions of source code must retain the above copyright 10 * notice, this list of conditions and the following disclaimer. 11 * 12 * * Redistributions in binary form must reproduce the above copyright 13 * notice, this list of conditions and the following disclaimer in the 14 * documentation and/or other materials provided with the distribution. 15 * 16 * * Neither the name of 'jMonkeyEngine' nor the names of its contributors 17 * may be used to endorse or promote products derived from this software 18 * without specific prior written permission. 19 * 20 * THIS SOFTWARE IS PROVIDED BY THE COPYRIGHT HOLDERS AND CONTRIBUTORS 21 * "AS IS" AND ANY EXPRESS OR IMPLIED WARRANTIES, INCLUDING, BUT NOT LIMITED 22 * TO, THE IMPLIED WARRANTIES OF MERCHANTABILITY AND FITNESS FOR A PARTICULAR 23 * PURPOSE ARE DISCLAIMED. IN NO EVENT SHALL THE COPYRIGHT OWNER OR 24 * CONTRIBUTORS BE LIABLE FOR ANY DIRECT, INDIRECT, INCIDENTAL, SPECIAL, 25 * EXEMPLARY, OR CONSEQUENTIAL DAMAGES (INCLUDING, BUT NOT LIMITED TO, 26 * PROCUREMENT OF SUBSTITUTE GOODS OR SERVICES; LOSS OF USE, DATA, OR 27 * PROFITS; OR BUSINESS INTERRUPTION) HOWEVER CAUSED AND ON ANY THEORY OF 28 * LIABILITY, WHETHER IN CONTRACT, STRICT LIABILITY, OR TORT (INCLUDING 29 * NEGLIGENCE OR OTHERWISE) ARISING IN ANY WAY OUT OF THE USE OF THIS 30 * SOFTWARE, EVEN IF ADVISED OF THE POSSIBILITY OF SUCH DAMAGE. 31 */ 32 package com.jme3.bullet.collision.shapes; 33 34 import com.bulletphysics.collision.shapes.BvhTriangleMeshShape; 35 import com.bulletphysics.collision.shapes.IndexedMesh; 36 import com.bulletphysics.collision.shapes.TriangleIndexVertexArray; 37 import com.jme3.bullet.util.Converter; 38 import com.jme3.export.InputCapsule; 39 import com.jme3.export.JmeExporter; 40 import com.jme3.export.JmeImporter; 41 import com.jme3.export.OutputCapsule; 42 import com.jme3.math.Vector3f; 43 import com.jme3.scene.Mesh; 44 import java.io.IOException; 45 import java.nio.ByteBuffer; 46 47 /** 48 * Basic mesh collision shape 49 * @author normenhansen 50 */ 51 public class MeshCollisionShape extends CollisionShape { 52 53 protected int numVertices, numTriangles, vertexStride, triangleIndexStride; 54 protected ByteBuffer triangleIndexBase, vertexBase; 55 protected IndexedMesh bulletMesh; 56 57 public MeshCollisionShape() { 58 } 59 60 /** 61 * creates a collision shape from the given TriMesh 62 * @param mesh the TriMesh to use 63 */ 64 public MeshCollisionShape(Mesh mesh) { 65 createCollisionMesh(mesh, new Vector3f(1, 1, 1)); 66 } 67 68 private void createCollisionMesh(Mesh mesh, Vector3f worldScale) { 69 this.scale = worldScale; 70 bulletMesh = Converter.convert(mesh); 71 this.numVertices = bulletMesh.numVertices; 72 this.numTriangles = bulletMesh.numTriangles; 73 this.vertexStride = bulletMesh.vertexStride; 74 this.triangleIndexStride = bulletMesh.triangleIndexStride; 75 this.triangleIndexBase = bulletMesh.triangleIndexBase; 76 this.vertexBase = bulletMesh.vertexBase; 77 createShape(); 78 } 79 80 /** 81 * creates a jme mesh from the collision shape, only needed for debugging 82 */ 83 public Mesh createJmeMesh(){ 84 return Converter.convert(bulletMesh); 85 } 86 87 public void write(JmeExporter ex) throws IOException { 88 super.write(ex); 89 OutputCapsule capsule = ex.getCapsule(this); 90 capsule.write(numVertices, "numVertices", 0); 91 capsule.write(numTriangles, "numTriangles", 0); 92 capsule.write(vertexStride, "vertexStride", 0); 93 capsule.write(triangleIndexStride, "triangleIndexStride", 0); 94 95 capsule.write(triangleIndexBase.array(), "triangleIndexBase", new byte[0]); 96 capsule.write(vertexBase.array(), "vertexBase", new byte[0]); 97 } 98 99 public void read(JmeImporter im) throws IOException { 100 super.read(im); 101 InputCapsule capsule = im.getCapsule(this); 102 numVertices = capsule.readInt("numVertices", 0); 103 numTriangles = capsule.readInt("numTriangles", 0); 104 vertexStride = capsule.readInt("vertexStride", 0); 105 triangleIndexStride = capsule.readInt("triangleIndexStride", 0); 106 107 triangleIndexBase = ByteBuffer.wrap(capsule.readByteArray("triangleIndexBase", new byte[0])); 108 vertexBase = ByteBuffer.wrap(capsule.readByteArray("vertexBase", new byte[0])); 109 createShape(); 110 } 111 112 protected void createShape() { 113 bulletMesh = new IndexedMesh(); 114 bulletMesh.numVertices = numVertices; 115 bulletMesh.numTriangles = numTriangles; 116 bulletMesh.vertexStride = vertexStride; 117 bulletMesh.triangleIndexStride = triangleIndexStride; 118 bulletMesh.triangleIndexBase = triangleIndexBase; 119 bulletMesh.vertexBase = vertexBase; 120 bulletMesh.triangleIndexBase = triangleIndexBase; 121 TriangleIndexVertexArray tiv = new TriangleIndexVertexArray(numTriangles, triangleIndexBase, triangleIndexStride, numVertices, vertexBase, vertexStride); 122 cShape = new BvhTriangleMeshShape(tiv, true); 123 cShape.setLocalScaling(Converter.convert(getScale())); 124 cShape.setMargin(margin); 125 } 126 } 127
