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 */
32package com.jme3.bullet.collision.shapes;
33
34import com.jme3.bullet.util.NativeMeshUtil;
35import com.jme3.export.InputCapsule;
36import com.jme3.export.JmeExporter;
37import com.jme3.export.JmeImporter;
38import com.jme3.export.OutputCapsule;
39import com.jme3.scene.Mesh;
40import com.jme3.scene.VertexBuffer.Type;
41import com.jme3.scene.mesh.IndexBuffer;
42import com.jme3.util.BufferUtils;
43import java.io.IOException;
44import java.nio.ByteBuffer;
45import java.nio.ByteOrder;
46import java.nio.FloatBuffer;
47import java.util.logging.Level;
48import java.util.logging.Logger;
49
50/**
51 * Basic mesh collision shape
52 * @author normenhansen
53 */
54public class MeshCollisionShape extends CollisionShape {
55
56    protected int numVertices, numTriangles, vertexStride, triangleIndexStride;
57    protected ByteBuffer triangleIndexBase, vertexBase;
58    protected long meshId = 0;
59
60    public MeshCollisionShape() {
61    }
62
63    /**
64     * creates a collision shape from the given TriMesh
65     * @param mesh the TriMesh to use
66     */
67    public MeshCollisionShape(Mesh mesh) {
68        createCollisionMesh(mesh);
69    }
70
71    private void createCollisionMesh(Mesh mesh) {
72        triangleIndexBase = BufferUtils.createByteBuffer(mesh.getTriangleCount() * 3 * 4);
73        vertexBase = BufferUtils.createByteBuffer(mesh.getVertexCount() * 3 * 4);
74        numVertices = mesh.getVertexCount();
75        vertexStride = 12; //3 verts * 4 bytes per.
76        numTriangles = mesh.getTriangleCount();
77        triangleIndexStride = 12; //3 index entries * 4 bytes each.
78
79        IndexBuffer indices = mesh.getIndexBuffer();
80        FloatBuffer vertices = mesh.getFloatBuffer(Type.Position);
81        vertices.rewind();
82
83        int verticesLength = mesh.getVertexCount() * 3;
84        for (int i = 0; i < verticesLength; i++) {
85            float tempFloat = vertices.get();
86            vertexBase.putFloat(tempFloat);
87        }
88
89        int indicesLength = mesh.getTriangleCount() * 3;
90        for (int i = 0; i < indicesLength; i++) {
91            triangleIndexBase.putInt(indices.get(i));
92        }
93        vertices.rewind();
94        vertices.clear();
95
96        createShape();
97    }
98
99    /**
100     * creates a jme mesh from the collision shape, only needed for debugging
101     */
102//    public Mesh createJmeMesh(){
103//        return Converter.convert(bulletMesh);
104//    }
105    public void write(JmeExporter ex) throws IOException {
106        super.write(ex);
107        OutputCapsule capsule = ex.getCapsule(this);
108        capsule.write(numVertices, "numVertices", 0);
109        capsule.write(numTriangles, "numTriangles", 0);
110        capsule.write(vertexStride, "vertexStride", 0);
111        capsule.write(triangleIndexStride, "triangleIndexStride", 0);
112
113        capsule.write(triangleIndexBase.array(), "triangleIndexBase", new byte[0]);
114        capsule.write(vertexBase.array(), "vertexBase", new byte[0]);
115    }
116
117    public void read(JmeImporter im) throws IOException {
118        super.read(im);
119        InputCapsule capsule = im.getCapsule(this);
120        numVertices = capsule.readInt("numVertices", 0);
121        numTriangles = capsule.readInt("numTriangles", 0);
122        vertexStride = capsule.readInt("vertexStride", 0);
123        triangleIndexStride = capsule.readInt("triangleIndexStride", 0);
124
125        triangleIndexBase = ByteBuffer.wrap(capsule.readByteArray("triangleIndexBase", new byte[0]));
126        vertexBase = ByteBuffer.wrap(capsule.readByteArray("vertexBase", new byte[0])).order(ByteOrder.nativeOrder());
127        createShape();
128    }
129
130    protected void createShape() {
131//        bulletMesh = new IndexedMesh();
132//        bulletMesh.numVertices = numVertices;
133//        bulletMesh.numTriangles = numTriangles;
134//        bulletMesh.vertexStride = vertexStride;
135//        bulletMesh.triangleIndexStride = triangleIndexStride;
136//        bulletMesh.triangleIndexBase = triangleIndexBase;
137//        bulletMesh.vertexBase = vertexBase;
138//        bulletMesh.triangleIndexBase = triangleIndexBase;
139//        TriangleIndexVertexArray tiv = new TriangleIndexVertexArray(numTriangles, triangleIndexBase, triangleIndexStride, numVertices, vertexBase, vertexStride);
140//        objectId = new BvhTriangleMeshShape(tiv, true);
141//        objectId.setLocalScaling(Converter.convert(getScale()));
142//        objectId.setMargin(margin);
143        meshId = NativeMeshUtil.createTriangleIndexVertexArray(triangleIndexBase, vertexBase, numTriangles, numVertices, vertexStride, triangleIndexStride);
144        Logger.getLogger(this.getClass().getName()).log(Level.INFO, "Created Mesh {0}", Long.toHexString(meshId));
145        objectId = createShape(meshId);
146        Logger.getLogger(this.getClass().getName()).log(Level.INFO, "Created Shape {0}", Long.toHexString(objectId));
147        setScale(scale);
148        setMargin(margin);
149    }
150
151    private native long createShape(long meshId);
152
153    @Override
154    protected void finalize() throws Throwable {
155        super.finalize();
156        Logger.getLogger(this.getClass().getName()).log(Level.INFO, "Finalizing Mesh {0}", Long.toHexString(meshId));
157        finalizeNative(meshId);
158    }
159
160    private native void finalizeNative(long objectId);
161}
162