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/Users/lyon/j4p/src/j3d/GeomInfoApp.java
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1 package j3d;
2
3
4 /*
5 * GeomInfoApp.java demonstrates the use of the GeometryInfo class
6 * and related classes.
7 *
8 * This program creates a car shape (not a fancy car, though) using
9 * GeometryInfo objects. One GeometryInfo object specifies the side
10 * of the car using a polygon (not a triangle, nor a quad). The
11 * GeometryInfo and other classes convert the polygons into a triangle
12 * strips with normals.
13 *
14 * Note that about half of the source code just specifies the
15 * input data to the GeometryInfo objects. The interesting part
16 * starts around line 210.
17 *
18 * An alternative data set is provided (in the comments) for further
19 * experimentation - see the tutorial text.
20 */
21
22 import com.sun.j3d.utils.applet.MainFrame;
23 import com.sun.j3d.utils.geometry.GeometryInfo;
24 import com.sun.j3d.utils.geometry.NormalGenerator;
25 import com.sun.j3d.utils.geometry.Stripifier;
26 import com.sun.j3d.utils.universe.SimpleUniverse;
27
28 import javax.media.j3d.*;
29 import javax.vecmath.Color3f;
30 import javax.vecmath.Vector3f;
31 import java.applet.Applet;
32 import java.awt.*;
33
34
35 public class GeomInfoApp extends Applet {
36
37 float[] createCoordinateData() {
38 float[] data = new float[69 * 3]; // ******
39 int i = 0;
40
41 data[i++] = -1.3f;
42 data[i++] = -0.3f;
43 data[i++] = 0.3f; //0
44 data[i++] = -0.9f;
45 data[i++] = -0.3f;
46 data[i++] = 0.3f; //1
47 data[i++] = -0.8f;
48 data[i++] = -0.1f;
49 data[i++] = 0.3f; //2
50 data[i++] = -0.6f;
51 data[i++] = -0.1f;
52 data[i++] = 0.3f; //3
53 data[i++] = -0.5f;
54 data[i++] = -0.3f;
55 data[i++] = 0.3f; //4
56 data[i++] = 0.2f;
57 data[i++] = -0.3f;
58 data[i++] = 0.3f; //5
59 data[i++] = 0.3f;
60 data[i++] = -0.1f;
61 data[i++] = 0.3f; //6
62 data[i++] = 0.5f;
63 data[i++] = -0.1f;
64 data[i++] = 0.3f; //7
65 data[i++] = 0.6f;
66 data[i++] = -0.3f;
67 data[i++] = 0.3f; //8
68 data[i++] = 1.3f;
69 data[i++] = -0.3f;
70 data[i++] = 0.3f; //9
71 data[i++] = 1.2f;
72 data[i++] = -0.1f;
73 data[i++] = 0.3f; //10
74 data[i++] = 0.5f;
75 data[i++] = 0.0f;
76 data[i++] = 0.3f; //11
77 data[i++] = 0.1f;
78 data[i++] = 0.3f;
79 data[i++] = 0.3f; //12
80 data[i++] = -0.5f;
81 data[i++] = 0.3f;
82 data[i++] = 0.3f; //13
83 data[i++] = -1.1f;
84 data[i++] = 0.0f;
85 data[i++] = 0.3f; //14
86 data[i++] = -1.3f;
87 data[i++] = 0.0f;
88 data[i++] = 0.3f; //15
89 data[i++] = -1.3f;
90 data[i++] = -0.3f;
91 data[i++] = 0.3f; //16
92 System.out.println("end polygon; total vertex count: " + i / 3);
93
94 data[i++] = -1.3f;
95 data[i++] = -0.3f;
96 data[i++] = -0.3f; // 0 17
97 data[i++] = -1.3f;
98 data[i++] = 0.0f;
99 data[i++] = -0.3f; // 1 18
100 data[i++] = -1.1f;
101 data[i++] = 0.0f;
102 data[i++] = -0.3f; // 2 19
103 data[i++] = -0.5f;
104 data[i++] = 0.3f;
105 data[i++] = -0.3f; // 3 20
106 data[i++] = 0.1f;
107 data[i++] = 0.3f;
108 data[i++] = -0.3f; // 4 21
109 data[i++] = 0.5f;
110 data[i++] = 0.0f;
111 data[i++] = -0.3f; // 5 22
112 data[i++] = 1.2f;
113 data[i++] = -0.1f;
114 data[i++] = -0.3f; // 6 23
115 data[i++] = 1.3f;
116 data[i++] = -0.3f;
117 data[i++] = -0.3f; // 7 24
118 data[i++] = 0.6f;
119 data[i++] = -0.3f;
120 data[i++] = -0.3f; // 8 25
121 data[i++] = 0.5f;
122 data[i++] = -0.1f;
123 data[i++] = -0.3f; // 9 26
124 data[i++] = 0.3f;
125 data[i++] = -0.1f;
126 data[i++] = -0.3f; //10 27
127 data[i++] = 0.2f;
128 data[i++] = -0.3f;
129 data[i++] = -0.3f; //11 28
130 data[i++] = -0.5f;
131 data[i++] = -0.3f;
132 data[i++] = -0.3f; //12 29
133 data[i++] = -0.6f;
134 data[i++] = -0.1f;
135 data[i++] = -0.3f; //13 30
136 data[i++] = -0.8f;
137 data[i++] = -0.1f;
138 data[i++] = -0.3f; //14 31
139 data[i++] = -0.9f;
140 data[i++] = -0.3f;
141 data[i++] = -0.3f; //15 32
142 data[i++] = -1.3f;
143 data[i++] = -0.3f;
144 data[i++] = -0.3f; //16 33
145 System.out.println("end polygon; total vertex count: " + i / 3);
146
147 data[i++] = 1.3f;
148 data[i++] = -0.3f;
149 data[i++] = -0.3f; // 0 34
150 data[i++] = 1.2f;
151 data[i++] = -0.1f;
152 data[i++] = -0.3f; // 1 35
153 data[i++] = 1.2f;
154 data[i++] = -0.1f;
155 data[i++] = 0.3f; // 2 36
156 data[i++] = 1.3f;
157 data[i++] = -0.3f;
158 data[i++] = 0.3f; // 3 37
159 data[i++] = 1.3f;
160 data[i++] = -0.3f;
161 data[i++] = -0.3f; // 4 38
162 System.out.println("end polygon; total vertex count: " + i / 3);
163
164 data[i++] = 1.2f;
165 data[i++] = -0.1f;
166 data[i++] = -0.3f; // 0 39
167 data[i++] = 0.5f;
168 data[i++] = 0.0f;
169 data[i++] = -0.3f; // 1 40
170 data[i++] = 0.5f;
171 data[i++] = 0.0f;
172 data[i++] = 0.3f; // 2 41
173 data[i++] = 1.2f;
174 data[i++] = -0.1f;
175 data[i++] = 0.3f; // 3 42
176 data[i++] = 1.2f;
177 data[i++] = -0.1f;
178 data[i++] = -0.3f; // 4 43
179 System.out.println("end polygon; total vertex count: " + i / 3);
180
181 data[i++] = 0.5f;
182 data[i++] = 0.0f;
183 data[i++] = -0.3f; // 0 44
184 data[i++] = 0.1f;
185 data[i++] = 0.3f;
186 data[i++] = -0.3f; // 1 45
187 data[i++] = 0.1f;
188 data[i++] = 0.3f;
189 data[i++] = 0.3f; // 2 46
190 data[i++] = 0.5f;
191 data[i++] = 0.0f;
192 data[i++] = 0.3f; // 3 47
193 data[i++] = 0.5f;
194 data[i++] = 0.0f;
195 data[i++] = -0.3f; // 4 48
196 System.out.println("end polygon; total vertex count: " + i / 3);
197
198 data[i++] = 0.1f;
199 data[i++] = 0.3f;
200 data[i++] = -0.3f; // 0 49
201 data[i++] = -0.5f;
202 data[i++] = 0.3f;
203 data[i++] = -0.3f; // 1 50
204 data[i++] = -0.5f;
205 data[i++] = 0.3f;
206 data[i++] = 0.3f; // 2 51
207 data[i++] = 0.1f;
208 data[i++] = 0.3f;
209 data[i++] = 0.3f; // 3 52
210 data[i++] = 0.1f;
211 data[i++] = 0.3f;
212 data[i++] = -0.3f; // 4 53
213 System.out.println("end polygon; total vertex count: " + i / 3);
214
215 data[i++] = -0.5f;
216 data[i++] = 0.3f;
217 data[i++] = -0.3f; // 0 54
218 data[i++] = -1.1f;
219 data[i++] = 0.0f;
220 data[i++] = -0.3f; // 1 55
221 data[i++] = -1.1f;
222 data[i++] = 0.0f;
223 data[i++] = 0.3f; // 2 56
224 data[i++] = -0.5f;
225 data[i++] = 0.3f;
226 data[i++] = 0.3f; // 3 57
227 data[i++] = -0.5f;
228 data[i++] = 0.3f;
229 data[i++] = -0.3f; // 4 58
230 System.out.println("end polygon; total vertex count: " + i / 3);
231
232 data[i++] = -1.1f;
233 data[i++] = 0.0f;
234 data[i++] = -0.3f; // 0 59
235 data[i++] = -1.3f;
236 data[i++] = 0.0f;
237 data[i++] = -0.3f; // 1 60
238 data[i++] = -1.3f;
239 data[i++] = 0.0f;
240 data[i++] = 0.3f; // 2 61
241 data[i++] = -1.1f;
242 data[i++] = 0.0f;
243 data[i++] = 0.3f; // 3 62
244 data[i++] = -1.1f;
245 data[i++] = 0.0f;
246 data[i++] = -0.3f; // 4 63
247 System.out.println("end polygon; total vertex count: " + i / 3);
248
249 data[i++] = -1.3f;
250 data[i++] = 0.0f;
251 data[i++] = -0.3f; // 0 64
252 data[i++] = -1.3f;
253 data[i++] = -0.3f;
254 data[i++] = -0.3f; // 1 65
255 data[i++] = -1.3f;
256 data[i++] = -0.3f;
257 data[i++] = 0.3f; // 2 66
258 data[i++] = -1.3f;
259 data[i++] = 0.0f;
260 data[i++] = 0.3f; // 3 67
261 data[i++] = -1.3f;
262 data[i++] = 0.0f;
263 data[i++] = -0.3f; // 4 68
264 System.out.println("end polygon; total vertex count: " + i / 3);
265
266 // ****** This is the data for the hood, roof, trunk, front and rear glass
267 // ****** remove the comments markers below (slash-star) and (star slash)
268 // ****** and add the appropriate comment markers above.
269 // ****** modification of other lines of code is necessary to use this data
270 // ****** one line above and two lines below
271 /*
272 data[i++]= 1.3f; data[i++]= -0.3f; data[i++]=-0.3f; // 0 35
273 data[i++]= 1.2f; data[i++]= -0.1f; data[i++]=-0.3f; // 1 36
274 data[i++]= 0.5f; data[i++]= 0.0f; data[i++]=-0.3f; // 2 37
275 data[i++]= 0.1f; data[i++]= 0.3f; data[i++]=-0.3f; // 3 38
276 data[i++]= -0.5f; data[i++]= 0.3f; data[i++]=-0.3f; // 4 39
277 data[i++]= -1.1f; data[i++]= 0.0f; data[i++]=-0.3f; // 5 40
278 data[i++]= -1.3f; data[i++]= 0.0f; data[i++]=-0.3f; // 6 41
279 data[i++]= -1.3f; data[i++]= -0.3f; data[i++]=-0.3f; // 7 42
280 data[i++]= -1.3f; data[i++]= -0.3f; data[i++]= 0.3f; // 8 43
281 data[i++]= -1.3f; data[i++]= 0.0f; data[i++]= 0.3f; // 9 44
282 data[i++]= -1.1f; data[i++]= 0.0f; data[i++]= 0.3f; // 10 45
283 data[i++]= -0.5f; data[i++]= 0.3f; data[i++]= 0.3f; // 11 46
284 data[i++]= 0.1f; data[i++]= 0.3f; data[i++]= 0.3f; // 12 47
285 data[i++]= 0.5f; data[i++]= 0.0f; data[i++]= 0.3f; // 13 48
286 data[i++]= 1.2f; data[i++]= -0.1f; data[i++]= 0.3f; // 14 49
287 data[i++]= 1.3f; data[i++]= -0.3f; data[i++]= 0.3f; // 15 50
288 data[i++]= 1.3f; data[i++]= -0.3f; data[i++]=-0.3f; // 16 51
289 System.out.println("end polygon; total vertex count: "+i/3);
290 */
291 // ****** end of the alternative polygon data
292 return data;
293 }
294
295
296 Appearance createMaterialAppearance() {
297
298 Appearance materialAppear = new Appearance();
299 PolygonAttributes polyAttrib = new PolygonAttributes();
300 polyAttrib.setCullFace(PolygonAttributes.CULL_NONE);
301 materialAppear.setPolygonAttributes(polyAttrib);
302
303 Material material = new Material();
304 material.setDiffuseColor(new Color3f(1.0f, 0.0f, 0.0f));
305 materialAppear.setMaterial(material);
306
307 return materialAppear;
308 }
309
310 Appearance createWireFrameAppearance() {
311
312 Appearance materialAppear = new Appearance();
313 PolygonAttributes polyAttrib = new PolygonAttributes();
314 polyAttrib.setPolygonMode(PolygonAttributes.POLYGON_LINE);
315 materialAppear.setPolygonAttributes(polyAttrib);
316 ColoringAttributes redColoring = new ColoringAttributes();
317 redColoring.setColor(1.0f, 0.0f, 0.0f);
318 materialAppear.setColoringAttributes(redColoring);
319
320 return materialAppear;
321 }
322
323 /////////////////////////////////////////////////
324 //
325 // create scene graph branch group
326 //
327 public BranchGroup createSceneGraph(boolean wireFrame) {
328 int total = 0;
329
330 System.out.println("\n --- geometry debug information --- \n");
331
332 float[] coordinateData = null;
333 coordinateData = createCoordinateData();
334 int[] stripCount = {17, 17, 5, 5, 5, 5, 5, 5, 5}; // ******
335 // int[] stripCount = {17,17,17}; // ******
336
337 for (int i = 0; i < stripCount.length; i++) {
338 System.out.println("stripCount[" + i + "] = " + stripCount[i]);
339 total += stripCount[i];
340 }
341
342 if (total != coordinateData.length / 3) {
343 System.out.println(" coordinateData vertex count: " + coordinateData.length / 3);
344 System.out.println("stripCount total vertex count: " + total);
345 }
346
347 GeometryInfo gi = new GeometryInfo(GeometryInfo.POLYGON_ARRAY);
348 gi.setCoordinates(coordinateData);
349 gi.setStripCounts(stripCount);
350 System.out.println("begin triangulation");
351 System.out.println(" END triangulation");
352 gi.recomputeIndices();
353
354 NormalGenerator ng = new NormalGenerator();
355 ng.generateNormals(gi);
356 gi.recomputeIndices();
357
358 Stripifier st = new Stripifier();
359 st.stripify(gi);
360 gi.recomputeIndices();
361
362 Shape3D part = new Shape3D();
363 if (wireFrame == true)
364 part.setAppearance(createWireFrameAppearance());
365 else
366 part.setAppearance(createMaterialAppearance());
367 part.setGeometry(gi.getGeometryArray());
368
369 /////////////////////////////
370
371 BranchGroup contentRoot = new BranchGroup();
372
373 // Create the transform group node and initialize it to the
374 // identity. Add it to the root of the subgraph.
375 TransformGroup objSpin = new TransformGroup();
376 objSpin.setCapability(TransformGroup.ALLOW_TRANSFORM_WRITE);
377 contentRoot.addChild(objSpin);
378
379 objSpin.addChild(part);
380
381 ////////////////////////
382 LineStripArray lineArray = new LineStripArray(69, LineArray.COORDINATES, stripCount); //*****
383 // LineStripArray lineArray = new LineStripArray(51, LineArray.COORDINATES, stripCount); //*****
384 lineArray.setCoordinates(0, coordinateData);
385 Appearance blueColorAppearance = new Appearance();
386 ColoringAttributes blueColoring = new ColoringAttributes();
387 blueColoring.setColor(0.0f, 0.0f, 1.0f);
388 blueColorAppearance.setColoringAttributes(blueColoring);
389 LineAttributes lineAttrib = new LineAttributes();
390 lineAttrib.setLineWidth(2.0f);
391 blueColorAppearance.setLineAttributes(lineAttrib);
392 objSpin.addChild(new Shape3D(lineArray, blueColorAppearance));
393
394 Alpha rotationAlpha = new Alpha(-1, 16000);
395
396 RotationInterpolator rotator =
397 new RotationInterpolator(rotationAlpha, objSpin);
398
399 // a bounding sphere specifies a region a behavior is active
400 // create a sphere centered at the origin with radius of 1
401 BoundingSphere bounds = new BoundingSphere();
402 rotator.setSchedulingBounds(bounds);
403 objSpin.addChild(rotator);
404
405 DirectionalLight lightD = new DirectionalLight();
406 lightD.setDirection(new Vector3f(0.0f, -0.7f, -0.7f));
407 lightD.setInfluencingBounds(bounds);
408 contentRoot.addChild(lightD);
409
410 AmbientLight lightA = new AmbientLight();
411 lightA.setInfluencingBounds(bounds);
412 contentRoot.addChild(lightA);
413
414 Background background = new Background();
415 background.setColor(1.0f, 1.0f, 1.0f);
416 background.setApplicationBounds(bounds);
417 contentRoot.addChild(background);
418
419 // Let Java 3D perform optimizations on this scene graph.
420 // contentRoot.compile();
421
422 return contentRoot;
423 } // end of CreateSceneGraph method of MobiusApp
424
425 // Create a simple scene and attach it to the virtual universe
426
427 public GeomInfoApp(String[] args) {
428 setLayout(new BorderLayout());
429 GraphicsConfiguration config =
430 SimpleUniverse.getPreferredConfiguration();
431
432 Canvas3D canvas3D = new Canvas3D(config);
433 add("Center", canvas3D);
434
435 BranchGroup scene = createSceneGraph(args.length > 0);
436
437 // SimpleUniverse is a Convenience Utility class
438 SimpleUniverse simpleU = new SimpleUniverse(canvas3D);
439
440 // This will move the ViewPlatform back a bit so the
441 // objects in the scene can be viewed.
442 simpleU.getViewingPlatform().setNominalViewingTransform();
443
444 simpleU.addBranchGraph(scene);
445 } // end of GeomInfoApp constructor
446
447 // The following allows this to be run as an application
448 // as well as an applet
449
450 public static void main(String[] args) {
451 System.out.print("GeomInfoApp - Java 3D API demo program\n");
452 System.out.print("A demonstration of using the GeometryInfo class.\n");
453 System.out.print("The blue lines show the input geometry - the red ");
454 System.out.print("geometry was created by the GeometryInfo and other classes.\n");
455 System.out.print("Running the program without any command line arguments will show a solid object\n");
456 System.out.print("Supplying any command line argument will show the wireframe.\n");
457 System.out.print("http://java.sun.com/products/java-media/3D/collateral\n");
458 new MainFrame(new GeomInfoApp(args), 256, 256);
459 } // end of main method of MobiusApp
460
461 } // end of class GeomInfoApp
462