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/Users/lyon/j4p/src/j3d/InterpolatorApp.java
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1 package j3d;
2
3 import com.sun.j3d.utils.applet.MainFrame;
4 import com.sun.j3d.utils.geometry.ColorCube;
5 import com.sun.j3d.utils.universe.SimpleUniverse;
6
7 import javax.media.j3d.*;
8 import javax.vecmath.Color3f;
9 import javax.vecmath.Point3f;
10 import javax.vecmath.Vector3f;
11 import java.applet.Applet;
12 import java.awt.*;
13
14
15 // InterpolatorApp renders an
16
17 public class InterpolatorApp extends Applet {
18
19 Shape3D createCar(float xScale, float yScale, boolean createNormals,
20 boolean assignColoring) {
21 Shape3D car = new Shape3D();
22 QuadArray carGeom = null;
23
24 if (createNormals)
25 carGeom = new QuadArray(16, GeometryArray.COORDINATES
26 | GeometryArray.NORMALS);
27 else
28 carGeom = new QuadArray(16, GeometryArray.COORDINATES);
29
30 carGeom.setCoordinate(0, new Point3f(xScale * -0.25f, yScale * 0.22f, 0.0f));
31 carGeom.setCoordinate(1, new Point3f(xScale * 0.20f, yScale * 0.22f, 0.0f));
32 carGeom.setCoordinate(2, new Point3f(xScale * 0.10f, yScale * 0.35f, 0.0f));
33 carGeom.setCoordinate(3, new Point3f(xScale * -0.20f, yScale * 0.35f, 0.0f));
34 carGeom.setCoordinate(4, new Point3f(xScale * -0.50f, yScale * 0.10f, 0.0f));
35 carGeom.setCoordinate(5, new Point3f(xScale * 0.50f, yScale * 0.10f, 0.0f));
36 carGeom.setCoordinate(6, new Point3f(xScale * 0.45f, yScale * 0.20f, 0.0f));
37 carGeom.setCoordinate(7, new Point3f(xScale * -0.48f, yScale * 0.20f, 0.0f));
38 carGeom.setCoordinate(8, new Point3f(xScale * -0.26f, yScale * 0.00f, 0.0f));
39 carGeom.setCoordinate(9, new Point3f(xScale * -0.18f, yScale * 0.00f, 0.0f));
40 carGeom.setCoordinate(10, new Point3f(xScale * -0.16f, yScale * 0.12f, 0.0f));
41 carGeom.setCoordinate(11, new Point3f(xScale * -0.28f, yScale * 0.12f, 0.0f));
42 carGeom.setCoordinate(12, new Point3f(xScale * 0.25f, yScale * 0.00f, 0.0f));
43 carGeom.setCoordinate(13, new Point3f(xScale * 0.33f, yScale * 0.00f, 0.0f));
44 carGeom.setCoordinate(14, new Point3f(xScale * 0.35f, yScale * 0.12f, 0.0f));
45 carGeom.setCoordinate(15, new Point3f(xScale * 0.23f, yScale * 0.12f, 0.0f));
46
47 if (createNormals) {
48 int i;
49 Vector3f normal = new Vector3f(0.6f, 0.6f, 0.8f);
50 for (i = 0; i < 8; i++)
51 carGeom.setNormal(i, normal);
52 normal.set(new Vector3f(0.5f, 0.5f, 0.5f));
53 for (i = 8; i < 16; i++)
54 carGeom.setNormal(i, normal);
55 }
56
57 if (assignColoring) {
58 ColoringAttributes colorAttrib =
59 new ColoringAttributes(0.0f, 0.0f, 1.0f, ColoringAttributes.NICEST);
60 Appearance carAppear = new Appearance();
61 carAppear.setColoringAttributes(colorAttrib);
62 car.setAppearance(carAppear);
63 }
64
65 car.setGeometry(carGeom);
66 return car;
67 }
68
69 public BranchGroup createSceneGraph() {
70 // Create the root of the branch graph
71 BranchGroup bg = new BranchGroup();
72 Transform3D t3d = new Transform3D();
73 BoundingSphere bounds = new BoundingSphere();
74
75 // create target TransformGroup with Capabilities
76 TransformGroup objMove = new TransformGroup();
77 objMove.setCapability(TransformGroup.ALLOW_TRANSFORM_WRITE);
78
79 // create target TransformGroup with Capabilities
80 TransformGroup objRotate = new TransformGroup();
81 objRotate.setCapability(TransformGroup.ALLOW_TRANSFORM_WRITE);
82
83 // create target TransformGroup with Capabilities
84 TransformGroup objScale = new TransformGroup();
85 objScale.setCapability(TransformGroup.ALLOW_TRANSFORM_WRITE);
86
87 // create target Material with Capabilities
88 Material objColor = new Material();
89 objColor.setCapability(Material.ALLOW_COMPONENT_WRITE);
90
91 // create target Transparency with Capabilities
92 TransparencyAttributes objTransp = new TransparencyAttributes();
93 objTransp.setCapability(TransparencyAttributes.ALLOW_VALUE_WRITE);
94 objTransp.setTransparencyMode(TransparencyAttributes.BLENDED);
95
96 // create target Switch with Capabilities
97 Switch objSwitch = new Switch();
98 objSwitch.setCapability(Switch.ALLOW_SWITCH_WRITE);
99
100 // create Alpha
101 Alpha alpha = new Alpha(-1,
102 Alpha.INCREASING_ENABLE + Alpha.DECREASING_ENABLE,
103 0, 0, 2000, 0, 1000, 2000, 0, 1000);
104
105 // create position interpolator
106 PositionInterpolator posInt
107 = createPositionInterpolator(alpha, objMove, bounds);
108
109 // create rotation interpolator
110 RotationInterpolator rotInt
111 = createRotationInterpolator(alpha, objRotate, bounds);
112
113 // create scale interpolator
114 ScaleInterpolator scaInt
115 = scaleInterpolator(alpha, objScale, bounds);
116
117 ColorInterpolator colInt
118 = createColorInterpolator(alpha, objColor, bounds);
119
120 TransparencyInterpolator traInt
121 = createTransparencyInterpolator(alpha, objTransp, bounds);
122
123 // create switch value interpolator
124 SwitchValueInterpolator swiInt = new SwitchValueInterpolator(alpha, objSwitch);
125 swiInt.setSchedulingBounds(bounds);
126
127 addCar1(t3d, bg, objMove, posInt);
128
129 addCar2(t3d, bg, objRotate, rotInt);
130
131 addCar3(t3d, bg, objScale, scaInt);
132
133 t3d.setTranslation(new Vector3f(0.0f, -0.2f, 0.0f));
134 TransformGroup objColorPos = new TransformGroup(t3d);
135 bg.addChild(objColorPos);
136 Shape3D colorCar = createCar(0.4f, 0.4f, true, false);
137 Appearance materialAppear = new Appearance();
138 materialAppear.setMaterial(objColor);
139 colorCar.setAppearance(materialAppear);
140 objColorPos.addChild(colorCar);
141 bg.addChild(colInt);
142
143 t3d.setTranslation(new Vector3f(0.0f, -0.5f, 0.0f));
144 TransformGroup objTranspPos = new TransformGroup(t3d);
145 bg.addChild(objTranspPos);
146 Shape3D transpCar = createCar(0.4f, 0.4f, false, true);
147 Appearance transpAppear = transpCar.getAppearance();
148 transpAppear.setTransparencyAttributes(objTransp);
149 objTranspPos.addChild(transpCar);
150 bg.addChild(traInt);
151
152 t3d.setTranslation(new Vector3f(0.0f, -0.8f, 0.0f));
153 TransformGroup objSwitchPos = new TransformGroup(t3d);
154 bg.addChild(objSwitchPos);
155 objSwitch.addChild(createCar(0.4f, 0.4f, false, true));
156 ;
157 objSwitch.addChild(new ColorCube(0.1f));
158 objSwitchPos.addChild(objSwitch);
159 bg.addChild(swiInt);
160 swiInt.setLastChildIndex(2);// since switch made after interpolator
161
162 DirectionalLight lightD1 = new DirectionalLight();
163 // lightD1.setDirection(new Vector3f(-0.7f,-0.7f,0.0f));
164 lightD1.setInfluencingBounds(bounds);
165 bg.addChild(lightD1);
166
167 Background background = new Background();
168 background.setColor(1.0f, 1.0f, 1.0f);
169 background.setApplicationBounds(new BoundingSphere());
170 bg.addChild(background);
171
172 // Let Java 3D perform optimizations on this scene graph.
173 bg.compile();
174
175 return bg;
176 } // end of CreateSceneGraph method of InterpolatorApp
177
178 private PositionInterpolator createPositionInterpolator(Alpha alpha, TransformGroup objMove, BoundingSphere bounds) {
179 PositionInterpolator posInt = new PositionInterpolator(alpha, objMove);
180 posInt.setSchedulingBounds(bounds);
181 posInt.setStartPosition(-1.0f);
182 return posInt;
183 }
184
185 private RotationInterpolator createRotationInterpolator(Alpha alpha, TransformGroup objRotate, BoundingSphere bounds) {
186 RotationInterpolator rotInt = new RotationInterpolator(alpha, objRotate);
187 rotInt.setSchedulingBounds(bounds);
188 return rotInt;
189 }
190
191 private ScaleInterpolator scaleInterpolator(Alpha alpha, TransformGroup objScale, BoundingSphere bounds) {
192 ScaleInterpolator scaInt = new ScaleInterpolator(alpha, objScale);
193 scaInt.setSchedulingBounds(bounds);
194 return scaInt;
195 }
196
197 private void addCar3(Transform3D t3d, BranchGroup bg, TransformGroup objScale, ScaleInterpolator scaInt) {
198 t3d.setTranslation(new Vector3f(0.0f, 0.2f, 0.0f));
199 TransformGroup objScalePos = new TransformGroup(t3d);
200 bg.addChild(objScalePos);
201 objScalePos.addChild(objScale);
202 objScale.addChild(createCar(0.4f, 0.4f, false, true));
203 bg.addChild(scaInt);
204 }
205
206 private void addCar2(Transform3D t3d, BranchGroup bg, TransformGroup objRotate, RotationInterpolator rotInt) {
207 t3d.setTranslation(new Vector3f(0.0f, 0.5f, 0.0f));
208 TransformGroup objRotPos = new TransformGroup(t3d);
209 bg.addChild(objRotPos);
210 objRotPos.addChild(objRotate);
211 objRotate.addChild(createCar(0.4f, 0.4f, false, true));
212 bg.addChild(rotInt);
213 }
214
215 private void addCar1(Transform3D t3d, BranchGroup bg, TransformGroup objMove, PositionInterpolator posInt) {
216 t3d.setTranslation(new Vector3f(0.0f, 0.8f, 0.0f));
217 TransformGroup objMovePos = new TransformGroup(t3d);
218 bg.addChild(objMovePos);
219 objMovePos.addChild(objMove);
220 objMove.addChild(createCar(0.4f, 0.4f, false, true));
221 bg.addChild(posInt);
222 }
223
224 private ColorInterpolator createColorInterpolator(Alpha alpha, Material objColor, BoundingSphere bounds) {
225 ColorInterpolator colInt = new ColorInterpolator(alpha, objColor);
226 colInt.setStartColor(new Color3f(1.0f, 0.0f, 0.0f));
227 colInt.setEndColor(new Color3f(0.0f, 0.0f, 1.0f));
228 colInt.setSchedulingBounds(bounds);
229 return colInt;
230 }
231
232 private TransparencyInterpolator createTransparencyInterpolator(Alpha alpha, TransparencyAttributes objTransp, BoundingSphere bounds) {
233 TransparencyInterpolator traInt = new TransparencyInterpolator(alpha, objTransp);
234 traInt.setSchedulingBounds(bounds);
235 return traInt;
236 }
237
238 // Create a simple scene and attach it to the virtual universe
239
240 public InterpolatorApp() {
241 setLayout(new BorderLayout());
242 GraphicsConfiguration gc =
243 SimpleUniverse.getPreferredConfiguration();
244
245 Canvas3D canvas3D = new Canvas3D(gc);
246 add("Center", canvas3D);
247
248 BranchGroup scene = createSceneGraph();
249
250 // SimpleUniverse is a Convenience Utility class
251 SimpleUniverse su = new SimpleUniverse(canvas3D);
252
253 // This will move the ViewPlatform back a bit so the
254 // objects in the scene can be viewed.
255 su.getViewingPlatform().setNominalViewingTransform();
256
257 su.addBranchGraph(scene);
258 } // end of InterpolatorApp (constructor)
259
260 // The following allows this to be run as an application
261 // as well as an applet
262
263 public static void main(String[] args) {
264 new MainFrame(new InterpolatorApp(), 256, 256);
265 } // end of main (method of InterpolatorApp)
266
267 } // end of class InterpolatorApp
268