Home | History | Annotate | Download | only in shapes 
      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.jme3.bullet.util.NativeMeshUtil;
     35 import com.jme3.export.InputCapsule;
     36 import com.jme3.export.JmeExporter;
     37 import com.jme3.export.JmeImporter;
     38 import com.jme3.export.OutputCapsule;
     39 import com.jme3.scene.Mesh;
     40 import com.jme3.scene.VertexBuffer.Type;
     41 import com.jme3.scene.mesh.IndexBuffer;
     42 import com.jme3.util.BufferUtils;
     43 import java.io.IOException;
     44 import java.nio.ByteBuffer;
     45 import java.nio.ByteOrder;
     46 import java.nio.FloatBuffer;
     47 import java.util.logging.Level;
     48 import java.util.logging.Logger;
     49 
     50 /**
     51  * Basic mesh collision shape
     52  * @author normenhansen
     53  */
     54 public 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