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.Converter;
35 import com.jme3.export.*;
36 import com.jme3.math.Vector3f;
37 import 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  */
45 public 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 
CollisionShape()51     public CollisionShape() {
52     }
53 
54     /**
55      * used internally, not safe
56      */
calculateLocalInertia(float mass, javax.vecmath.Vector3f vector)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      */
getCShape()71     public com.bulletphysics.collision.shapes.CollisionShape getCShape() {
72         return cShape;
73     }
74 
75     /**
76      * used internally
77      */
setCShape(com.bulletphysics.collision.shapes.CollisionShape cShape)78     public void setCShape(com.bulletphysics.collision.shapes.CollisionShape cShape) {
79         this.cShape = cShape;
80     }
81 
setScale(Vector3f scale)82     public void setScale(Vector3f scale) {
83         this.scale.set(scale);
84         cShape.setLocalScaling(Converter.convert(scale));
85     }
86 
getMargin()87     public float getMargin() {
88         return cShape.getMargin();
89     }
90 
setMargin(float margin)91     public void setMargin(float margin) {
92         cShape.setMargin(margin);
93         this.margin = margin;
94     }
95 
getScale()96     public Vector3f getScale() {
97         return scale;
98     }
99 
write(JmeExporter ex)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 
read(JmeImporter im)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