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/Users/lyon/j4p/src/j3d/cr325/Levitown.java
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1 /**
2 * Created by IntelliJ IDEA.
3 * User: jgervasio
4 * Date: Feb 23, 2004
5 * Time: 12:11:58 PM
6 * To change this template use Options | File Templates.
7 */
8 package j3d.cr325;
9
10
11 import com.sun.j3d.utils.applet.MainFrame;
12 import com.sun.j3d.utils.behaviors.keyboard.KeyNavigatorBehavior;
13 import com.sun.j3d.utils.geometry.Box;
14 import com.sun.j3d.utils.geometry.Cylinder;
15 import com.sun.j3d.utils.geometry.Sphere;
16 import j3d.Utils;
17
18 import javax.media.j3d.*;
19 import javax.vecmath.*;
20 import java.applet.Applet;
21 import java.awt.*;
22
23
24 // BillboardApp renders a simple landscape with billboard animated trees
25
26 public class Levitown extends Applet {
27 private BoundingSphere bsBounds
28 = new BoundingSphere(new Point3d(0.0, 0.0, 0.0), 100.0);
29 PositionInterpolator bulletInterpolator = null;
30 Alpha bulletAlpha = new Alpha(1, 0, 0, 500, 0, 0);
31
32 public Levitown() {
33 Canvas3D c3d
34 = Utils.getCanvas3D(this);
35 Locale l
36 = new Locale(new VirtualUniverse());
37 l.addBranchGraph(buildViewBranch(c3d));
38 TransformGroup tg = Shapes.getReadWriteTransformGroup();
39 l.addBranchGraph(getSceneBranchGroup(tg));
40 setLayout(new BorderLayout());
41 add("Center", c3d);
42
43 }
44
45
46 protected static BranchGroup buildViewBranch(Canvas3D c) {
47 BranchGroup viewBranch = new BranchGroup();
48
49
50 ViewPlatform myViewPlatform = new ViewPlatform();
51 TransformGroup viewXfmGroup = getViewTransformGroup(getViewTilt());
52 viewXfmGroup.addChild(myViewPlatform);
53 viewBranch.addChild(viewXfmGroup);
54 addKeyNavigation(viewXfmGroup, viewBranch);
55 View myView = new View();
56 myView.addCanvas3D(c);
57 myView.attachViewPlatform(myViewPlatform);
58 myView.setPhysicalBody(new PhysicalBody());
59 myView.setPhysicalEnvironment(new PhysicalEnvironment());
60 return viewBranch;
61 }
62
63 private static void addKeyNavigation(TransformGroup viewXfmGroup, BranchGroup viewBranch) {
64 KeyNavigatorBehavior knb = new KeyNavigatorBehavior(viewXfmGroup);
65 knb.setSchedulingBounds(new BoundingSphere());
66 viewBranch.addChild(knb);
67 }
68
69 private static Matrix3d getViewTilt() {
70 Matrix3d viewTilt = new Matrix3d();
71 viewTilt.rotX(Math.PI / -6);
72 return viewTilt;
73 }
74
75 private static TransformGroup getViewTransformGroup(Matrix3d viewTilt) {
76 Transform3D t3d = new Transform3D();
77 t3d.set(viewTilt, new Vector3d(0.0, 10.0, 10.0), 1.0);
78 TransformGroup viewXfmGroup
79 = new TransformGroup(t3d);
80 return viewXfmGroup;
81 }
82
83 public BranchGroup getSceneBranchGroup(TransformGroup tg) {
84 BranchGroup bg = Shapes.getReadWriteBranchGroup();
85
86 Vector3f translate = new Vector3f();
87 Transform3D t3d = new Transform3D();
88
89 BoundingSphere bs = new BoundingSphere();
90 bs.setRadius(10);
91
92 bg.addChild(Shapes.getLand());
93 bg.addChild(Shapes.getTreeBranchGroup());
94 bg.addChild(Shapes.getHousesBranchGroup());
95 bg.addChild(Shapes.getBackgroundBranchGroup());
96
97 raiseViewAboveGround(translate, t3d, tg);
98 //KeyBehavior keyNavBeh = new KeyBehavior( tg);
99 KeyNavigatorBehavior keyNavBeh = new KeyNavigatorBehavior(tg);
100 keyNavBeh.setSchedulingBounds(new BoundingSphere(new Point3d(), 10000.0));
101 bg.addChild(keyNavBeh);
102
103 bg.addChild(Target.getTargetGroup());
104 BranchGroup gunBg = buildGun();
105 Node theBulletNode = getBulletGroup();
106 bg.addChild(theBulletNode);
107 bg.addChild(gunBg);
108 return bg;
109 } // end of CreateSceneGraph method of BillboardApp
110
111 protected BranchGroup getBulletGroup() {
112 BranchGroup bullet = new BranchGroup();
113
114 Appearance bulletAppearance = new Appearance();
115 Color3f ambientColour = new Color3f(1.0f, 0.0f, 0.0f);
116 Color3f emissiveColour = new Color3f(0.0f, 0.0f, 0.0f);
117 Color3f specularColour = new Color3f(1.0f, 1.0f, 1.0f);
118 Color3f diffuseColour = new Color3f(1.0f, 0.0f, 0.0f);
119 float shininess = 20.0f;
120 bulletAppearance.setMaterial(new Material(ambientColour, emissiveColour,
121 diffuseColour, specularColour, shininess));
122
123 Sphere ball = new Sphere(0.2f, bulletAppearance);
124
125 TransformGroup ballMovXfmGrp = new TransformGroup();
126 ballMovXfmGrp.setCapability(TransformGroup.ALLOW_TRANSFORM_READ);
127 ballMovXfmGrp.setCapability(TransformGroup.ALLOW_TRANSFORM_WRITE);
128 ballMovXfmGrp.addChild(ball);
129 bullet.addChild(ballMovXfmGrp);
130
131
132 bulletInterpolator = new PositionInterpolator(bulletAlpha,
133 ballMovXfmGrp,
134 new Transform3D(), 0.0f, 50.0f);
135 bulletInterpolator.setSchedulingBounds(getBsBounds());
136 bullet.addChild(bulletInterpolator);
137
138 return bullet;
139
140 }
141
142 /**
143 * This builds the gun geometry.
144 * It uses box and cylinder primitives and sets up a
145 * transform group so that we can rotate the gun.
146 */
147 protected BranchGroup buildGun() {
148
149 Appearance gunApp = new Appearance();
150 Color3f ambientColour = new Color3f(0.5f, 0.5f, 0.5f);
151 Color3f emissiveColour = new Color3f(0.0f, 0.0f, 0.0f);
152 Color3f specularColour = new Color3f(1.0f, 1.0f, 1.0f);
153 Color3f diffuseColour = new Color3f(0.5f, 0.5f, 0.5f);
154 float shininess = 20.0f;
155 gunApp.setMaterial(new Material(ambientColour, emissiveColour,
156 diffuseColour, specularColour, shininess));
157 TransformGroup init = Shapes.getReadWriteTransformGroup();
158 TransformGroup barrel = Shapes.getReadWriteTransformGroup();
159 Transform3D gunXfm = new Transform3D();
160 Transform3D barrelXfm = new Transform3D();
161 barrelXfm.set(new Vector3d(0.0, -2.0, 0.0));
162 barrel.setTransform(barrelXfm);
163 Matrix3d gunXfmMat = new Matrix3d();
164 gunXfmMat.rotX(Math.PI / 2);
165 Vector3d gunTranslation = new Vector3d(0.0, -.250, -5);
166 gunXfm.set(gunXfmMat, gunTranslation, 1.0);
167 init.setTransform(gunXfm);
168
169 gunXfmGrp.addChild(new Box(1.0f, 1.0f, 0.5f, gunApp));
170 barrel.addChild(new Cylinder(0.3f, 4.0f, gunApp));
171 gunXfmGrp.addChild(barrel);
172
173 BranchGroup gunBranchGroup = Shapes.getReadWriteBranchGroup();
174 gunBranchGroup.addChild(init);
175 init.addChild(addKeyNavigatorBehavior(init));
176
177 return gunBranchGroup;
178 }
179
180 private KeyNavigatorBehavior addKeyNavigatorBehavior(TransformGroup init) {
181 KeyNavigatorBehavior knb = new KeyNavigatorBehavior(gunXfmGrp);
182 knb.setSchedulingBounds(new BoundingSphere());
183 init.addChild(gunXfmGrp);
184 return knb;
185 }
186
187 TransformGroup gunXfmGrp = Shapes.getReadWriteTransformGroup();
188
189 private void raiseViewAboveGround(Vector3f translate, Transform3D t3D, TransformGroup tg) {
190 translate.set(0.0f, 0.3f, 0.0f);
191 t3D.setTranslation(translate);
192 tg.setTransform(t3D);
193 }
194
195
196 public BoundingSphere getBsBounds() {
197 return bsBounds;
198 }
199
200 public static void main(String[] args) {
201 new MainFrame(new Levitown(), 256, 256);
202 } // end of main (method of BillboardApp)
203 }
204