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1   /*
2    * @(#) ContentBranch.java May 10, 2004
3    * 
4    * Copyright (c) 2003 Delft University of Technology Jaffalaan 5, 2628 BX Delft,
5    * the Netherlands All rights reserved.
6    * 
7    * This software is proprietary information of Delft University of Technology
8    * The code is published under the General Public License
9    */
10  package nl.tudelft.simulation.dsol.gui.animation3D;
11  
12  import javax.media.j3d.AmbientLight;
13  import javax.media.j3d.BoundingSphere;
14  import javax.media.j3d.BranchGroup;
15  import javax.media.j3d.DirectionalLight;
16  import javax.media.j3d.Group;
17  import javax.media.j3d.Node;
18  import javax.media.j3d.Transform3D;
19  import javax.media.j3d.TransformGroup;
20  import javax.vecmath.AxisAngle4d;
21  import javax.vecmath.Color3f;
22  import javax.vecmath.Point3d;
23  import javax.vecmath.Vector3f;
24  
25  /***
26   * ContentBranch, the content branch of the scene graph <br>
27   * (c) copyright 2003 <a href="http://www.simulation.tudelft.nl">Delft
28   * University of Technology </a>, the Netherlands. <br>
29   * See for project information <a
30   * href="http://www.simulation.tudelft.nl">www.simulation.tudelft.nl </a> <br>
31   * License of use: <a href="http://www.gnu.org/copyleft/gpl.html">General Public
32   * License (GPL) </a>, no warranty <br>
33   * 
34   * @version 1.0 10.05.2004 <br>
35   * @author <a href="http://www.tbm.tudelft.nl/webstaf/royc/index.htm">Roy Chin
36   *         </a>
37   */
38  public class ContentBranch extends BranchGroup
39  {
40  	/*** The light branch */
41  	protected BranchGroup lightBranch = new BranchGroup();
42  
43  	/*** The dynamic object branch */
44  	protected BranchGroup dynamicObjectBranch = new BranchGroup();
45  
46  	/*** The static object branch */
47  	protected BranchGroup staticObjectBranch = new BranchGroup();
48  
49  	/***
50  	 * Construct the scene graph
51  	 */
52  	public ContentBranch()
53  	{
54  		super();
55  		createBranch();
56  	}
57  
58  	/***
59  	 * Create the content branch
60  	 */
61  	protected void createBranch()
62  	{
63  		// set capabilities of content branch
64  		this.setCapability(Group.ALLOW_CHILDREN_READ);
65  		this.setCapability(Group.ALLOW_CHILDREN_WRITE);
66  		this.setCapability(Group.ALLOW_CHILDREN_EXTEND);
67  		this.setCapability(BranchGroup.ALLOW_DETACH);
68  		this.setCapability(Node.ALLOW_PICKABLE_READ);
69  		this.setCapability(Node.ALLOW_PICKABLE_WRITE);
70  
71  		// set capabilities of the dynamic branch
72  		this.dynamicObjectBranch.setCapability(Group.ALLOW_CHILDREN_READ);
73  		this.dynamicObjectBranch.setCapability(Group.ALLOW_CHILDREN_WRITE);
74  		this.dynamicObjectBranch.setCapability(Group.ALLOW_CHILDREN_EXTEND);
75  		this.dynamicObjectBranch.setCapability(BranchGroup.ALLOW_DETACH);
76  		this.dynamicObjectBranch.setCapability(Node.ALLOW_PICKABLE_READ);
77  		this.dynamicObjectBranch.setCapability(Node.ALLOW_PICKABLE_READ);
78  
79  		// set capabilities of the static branch
80  		this.staticObjectBranch.setCapability(Group.ALLOW_CHILDREN_READ);
81  		this.staticObjectBranch.setCapability(Group.ALLOW_CHILDREN_WRITE);
82  		this.staticObjectBranch.setCapability(Group.ALLOW_CHILDREN_EXTEND);
83  		this.staticObjectBranch.setCapability(BranchGroup.ALLOW_DETACH);
84  
85  		// Transform so that Z axis points upward
86  		Transform3D transform = new Transform3D();
87  		transform.set(new AxisAngle4d(1.0, 0.0, 0.0, Math.PI * -.5));
88  		TransformGroup rootTransformGroup = new TransformGroup(transform);
89  		// set capabilities of the rootTransformGroup
90  		rootTransformGroup.setCapability(Group.ALLOW_CHILDREN_READ);
91  		rootTransformGroup.setCapability(Group.ALLOW_CHILDREN_WRITE);
92  		rootTransformGroup.setCapability(Group.ALLOW_CHILDREN_EXTEND);
93  		rootTransformGroup.setCapability(Node.ALLOW_PICKABLE_READ);
94  		rootTransformGroup.setCapability(Node.ALLOW_PICKABLE_READ);
95  
96  		// Add some default light to the darkness
97  		this.addLights(this.lightBranch);
98  
99  		// Build the scene
100 		this.addChild(rootTransformGroup);
101 		rootTransformGroup.addChild(this.dynamicObjectBranch);
102 		rootTransformGroup.addChild(this.lightBranch);
103 		rootTransformGroup.addChild(this.staticObjectBranch);
104 		//contentBranch.compile();
105 	}
106 
107 	/***
108 	 * Add lights
109 	 * 
110 	 * @param branchGroup The branch group to add the light to
111 	 */
112 	protected void addLights(final BranchGroup branchGroup)
113 	{
114 		// Create bounding sphere for the light
115 		BoundingSphere bounds = new BoundingSphere(new Point3d(0.0, 0.0, 0.0),
116 				1000.0);
117 
118 		// Setup ambient light
119 		Color3f ambientColor = new Color3f(0.4f, 0.4f, 0.4f);
120 		AmbientLight ambientLight = new AmbientLight(ambientColor);
121 		ambientLight.setInfluencingBounds(bounds);
122 
123 		// Setup directional light
124 		Color3f lightColor = new Color3f(0.2f, 0.2f, 0.2f);
125 		Vector3f lightDirection = new Vector3f(-1.0f, -0.7f, -0.5f);
126 		DirectionalLight light = new DirectionalLight(lightColor,
127 				lightDirection);
128 		light.setInfluencingBounds(bounds);
129 
130 		// Add lights to branch group
131 		branchGroup.addChild(ambientLight);
132 		branchGroup.addChild(light);
133 	}
134 
135 	/***
136 	 * @return LightBranch
137 	 */
138 	public BranchGroup getLightBranch()
139 	{
140 		return this.lightBranch;
141 	}
142 
143 	/***
144 	 * @return DynamicObjectBranch: dynamic objects
145 	 */
146 	public BranchGroup getDynamicObjectBranch()
147 	{
148 		return this.dynamicObjectBranch;
149 	}
150 
151 	/***
152 	 * @return StaticObjectBranch: static objects
153 	 */
154 	public BranchGroup getStaticObjectBranch()
155 	{
156 		return this.staticObjectBranch;
157 	}
158 
159 }