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.Converter;
35import com.jme3.export.*;
36import com.jme3.math.Vector3f;
37import java.io.IOException;
38
39/**
40 * This Object holds information about a jbullet CollisionShape to be able to reuse
41 * CollisionShapes (as suggested in bullet manuals)
42 * TODO: add static methods to create shapes from nodes (like jbullet-jme constructor)
43 * @author normenhansen
44 */
45public abstract class CollisionShape implements Savable {
46
47    protected com.bulletphysics.collision.shapes.CollisionShape cShape;
48    protected Vector3f scale = new Vector3f(1, 1, 1);
49    protected float margin = 0.0f;
50
51    public CollisionShape() {
52    }
53
54    /**
55     * used internally, not safe
56     */
57    public void calculateLocalInertia(float mass, javax.vecmath.Vector3f vector) {
58        if (cShape == null) {
59            return;
60        }
61        if (this instanceof MeshCollisionShape) {
62            vector.set(0, 0, 0);
63        } else {
64            cShape.calculateLocalInertia(mass, vector);
65        }
66    }
67
68    /**
69     * used internally
70     */
71    public com.bulletphysics.collision.shapes.CollisionShape getCShape() {
72        return cShape;
73    }
74
75    /**
76     * used internally
77     */
78    public void setCShape(com.bulletphysics.collision.shapes.CollisionShape cShape) {
79        this.cShape = cShape;
80    }
81
82    public void setScale(Vector3f scale) {
83        this.scale.set(scale);
84        cShape.setLocalScaling(Converter.convert(scale));
85    }
86
87    public float getMargin() {
88        return cShape.getMargin();
89    }
90
91    public void setMargin(float margin) {
92        cShape.setMargin(margin);
93        this.margin = margin;
94    }
95
96    public Vector3f getScale() {
97        return scale;
98    }
99
100    public void write(JmeExporter ex) throws IOException {
101        OutputCapsule capsule = ex.getCapsule(this);
102        capsule.write(scale, "scale", new Vector3f(1, 1, 1));
103        capsule.write(getMargin(), "margin", 0.0f);
104    }
105
106    public void read(JmeImporter im) throws IOException {
107        InputCapsule capsule = im.getCapsule(this);
108        this.scale = (Vector3f) capsule.readSavable("scale", new Vector3f(1, 1, 1));
109        this.margin = capsule.readFloat("margin", 0.0f);
110    }
111}
112