Source Code Cross Referenced for LineStripArrayRetained.java in  » 6.0-JDK-Modules » java-3d » javax » media » j3d » Java Source Code / Java DocumentationJava Source Code and Java Documentation

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Java Source Code / Java Documentation » 6.0 JDK Modules » java 3d » javax.media.j3d 
Source Cross Referenced  Class Diagram Java Document (Java Doc) 


001:        /*
002:         * $RCSfile: LineStripArrayRetained.java,v $
003:         *
004:         * Copyright 1997-2008 Sun Microsystems, Inc.  All Rights Reserved.
005:         * DO NOT ALTER OR REMOVE COPYRIGHT NOTICES OR THIS FILE HEADER.
006:         *
007:         * This code is free software; you can redistribute it and/or modify it
008:         * under the terms of the GNU General Public License version 2 only, as
009:         * published by the Free Software Foundation.  Sun designates this
010:         * particular file as subject to the "Classpath" exception as provided
011:         * by Sun in the LICENSE file that accompanied this code.
012:         *
013:         * This code is distributed in the hope that it will be useful, but WITHOUT
014:         * ANY WARRANTY; without even the implied warranty of MERCHANTABILITY or
015:         * FITNESS FOR A PARTICULAR PURPOSE.  See the GNU General Public License
016:         * version 2 for more details (a copy is included in the LICENSE file that
017:         * accompanied this code).
018:         *
019:         * You should have received a copy of the GNU General Public License version
020:         * 2 along with this work; if not, write to the Free Software Foundation,
021:         * Inc., 51 Franklin St, Fifth Floor, Boston, MA 02110-1301 USA.
022:         *
023:         * Please contact Sun Microsystems, Inc., 4150 Network Circle, Santa Clara,
024:         * CA 95054 USA or visit www.sun.com if you need additional information or
025:         * have any questions.
026:         *
027:         * $Revision: 1.7 $
028:         * $Date: 2008/02/28 20:17:25 $
029:         * $State: Exp $
030:         */
031:
032:        package javax.media.j3d;
033:
034:        import javax.vecmath.*;
035:        import java.lang.Math;
036:
037:        /**
038:         * The LineStripArray object draws an array of vertices as a set of
039:         * connected line strips.  An array of per-strip vertex counts specifies
040:         * where the separate strips appear in the vertex array.
041:         * For every strip in the set, each vertex, beginning with
042:         * the second vertex in the array, defines a line segment to be drawn
043:         * from the previous vertex to the current vertex.
044:         */
045:
046:        class LineStripArrayRetained extends GeometryStripArrayRetained {
047:
048:            LineStripArrayRetained() {
049:                this .geoType = GEO_TYPE_LINE_STRIP_SET;
050:            }
051:
052:            boolean intersect(PickShape pickShape, PickInfo pickInfo,
053:                    int flags, Point3d iPnt, GeometryRetained geom,
054:                    int geomIndex) {
055:                Point3d pnts[] = new Point3d[2];
056:                double sdist[] = new double[1];
057:                double minDist = Double.MAX_VALUE;
058:                double x = 0, y = 0, z = 0;
059:                int j, end;
060:                int i = 0;
061:                pnts[0] = new Point3d();
062:                pnts[1] = new Point3d();
063:                int[] vtxIndexArr = new int[2];
064:
065:                switch (pickShape.getPickType()) {
066:                case PickShape.PICKRAY:
067:                    PickRay pickRay = (PickRay) pickShape;
068:
069:                    while (i < stripVertexCounts.length) {
070:                        j = stripStartVertexIndices[i];
071:                        end = j + stripVertexCounts[i++];
072:                        vtxIndexArr[0] = j;
073:                        getVertexData(j++, pnts[0]);
074:                        while (j < end) {
075:                            vtxIndexArr[1] = j;
076:                            getVertexData(j++, pnts[1]);
077:                            if (intersectLineAndRay(pnts[0], pnts[1],
078:                                    pickRay.origin, pickRay.direction, sdist,
079:                                    iPnt)) {
080:                                if (flags == 0) {
081:                                    return true;
082:                                }
083:                                if (sdist[0] < minDist) {
084:                                    minDist = sdist[0];
085:                                    x = iPnt.x;
086:                                    y = iPnt.y;
087:                                    z = iPnt.z;
088:                                    if ((flags & PickInfo.CLOSEST_GEOM_INFO) != 0) {
089:                                        storeInterestData(pickInfo, flags,
090:                                                geom, geomIndex, vtxIndexArr,
091:                                                iPnt, sdist[0]);
092:                                    }
093:                                }
094:                                if ((flags & PickInfo.ALL_GEOM_INFO) != 0) {
095:                                    storeInterestData(pickInfo, flags, geom,
096:                                            geomIndex, vtxIndexArr, iPnt,
097:                                            sdist[0]);
098:                                }
099:                            }
100:                            pnts[0].set(pnts[1]);
101:                            vtxIndexArr[0] = vtxIndexArr[1];
102:                        }
103:                    }
104:                    break;
105:                case PickShape.PICKSEGMENT:
106:                    PickSegment pickSegment = (PickSegment) pickShape;
107:                    Vector3d dir = new Vector3d(pickSegment.end.x
108:                            - pickSegment.start.x, pickSegment.end.y
109:                            - pickSegment.start.y, pickSegment.end.z
110:                            - pickSegment.start.z);
111:
112:                    while (i < stripVertexCounts.length) {
113:                        j = stripStartVertexIndices[i];
114:                        end = j + stripVertexCounts[i++];
115:                        vtxIndexArr[0] = j;
116:                        getVertexData(j++, pnts[0]);
117:                        while (j < end) {
118:                            vtxIndexArr[1] = j;
119:                            getVertexData(j++, pnts[1]);
120:                            if (intersectLineAndRay(pnts[0], pnts[1],
121:                                    pickSegment.start, dir, sdist, iPnt)
122:                                    && (sdist[0] <= 1.0)) {
123:                                if (flags == 0) {
124:                                    return true;
125:                                }
126:                                if (sdist[0] < minDist) {
127:                                    minDist = sdist[0];
128:                                    x = iPnt.x;
129:                                    y = iPnt.y;
130:                                    z = iPnt.z;
131:                                    if ((flags & PickInfo.CLOSEST_GEOM_INFO) != 0) {
132:                                        storeInterestData(pickInfo, flags,
133:                                                geom, geomIndex, vtxIndexArr,
134:                                                iPnt, sdist[0]);
135:                                    }
136:                                }
137:                                if ((flags & PickInfo.ALL_GEOM_INFO) != 0) {
138:                                    storeInterestData(pickInfo, flags, geom,
139:                                            geomIndex, vtxIndexArr, iPnt,
140:                                            sdist[0]);
141:                                }
142:                            }
143:                            pnts[0].set(pnts[1]);
144:                            vtxIndexArr[0] = vtxIndexArr[1];
145:                        }
146:                    }
147:                    break;
148:                case PickShape.PICKBOUNDINGBOX:
149:                    BoundingBox bbox = (BoundingBox) ((PickBounds) pickShape).bounds;
150:
151:                    while (i < stripVertexCounts.length) {
152:                        j = stripStartVertexIndices[i];
153:                        end = j + stripVertexCounts[i++];
154:                        vtxIndexArr[0] = j;
155:                        getVertexData(j++, pnts[0]);
156:                        while (j < end) {
157:                            vtxIndexArr[1] = j;
158:                            getVertexData(j++, pnts[1]);
159:                            if (intersectBoundingBox(pnts, bbox, sdist, iPnt)) {
160:                                if (flags == 0) {
161:                                    return true;
162:                                }
163:                                if (sdist[0] < minDist) {
164:                                    minDist = sdist[0];
165:                                    x = iPnt.x;
166:                                    y = iPnt.y;
167:                                    z = iPnt.z;
168:                                    if ((flags & PickInfo.CLOSEST_GEOM_INFO) != 0) {
169:                                        storeInterestData(pickInfo, flags,
170:                                                geom, geomIndex, vtxIndexArr,
171:                                                iPnt, sdist[0]);
172:                                    }
173:                                }
174:                                if ((flags & PickInfo.ALL_GEOM_INFO) != 0) {
175:                                    storeInterestData(pickInfo, flags, geom,
176:                                            geomIndex, vtxIndexArr, iPnt,
177:                                            sdist[0]);
178:                                }
179:                            }
180:                            pnts[0].set(pnts[1]);
181:                            vtxIndexArr[0] = vtxIndexArr[1];
182:                        }
183:                    }
184:
185:                    break;
186:                case PickShape.PICKBOUNDINGSPHERE:
187:                    BoundingSphere bsphere = (BoundingSphere) ((PickBounds) pickShape).bounds;
188:
189:                    while (i < stripVertexCounts.length) {
190:                        j = stripStartVertexIndices[i];
191:                        end = j + stripVertexCounts[i++];
192:                        vtxIndexArr[0] = j;
193:                        getVertexData(j++, pnts[0]);
194:                        while (j < end) {
195:                            vtxIndexArr[1] = j;
196:                            getVertexData(j++, pnts[1]);
197:                            if (intersectBoundingSphere(pnts, bsphere, sdist,
198:                                    iPnt)) {
199:                                if (flags == 0) {
200:                                    return true;
201:                                }
202:                                if (sdist[0] < minDist) {
203:                                    minDist = sdist[0];
204:                                    x = iPnt.x;
205:                                    y = iPnt.y;
206:                                    z = iPnt.z;
207:                                    if ((flags & PickInfo.CLOSEST_GEOM_INFO) != 0) {
208:                                        storeInterestData(pickInfo, flags,
209:                                                geom, geomIndex, vtxIndexArr,
210:                                                iPnt, sdist[0]);
211:                                    }
212:                                }
213:                                if ((flags & PickInfo.ALL_GEOM_INFO) != 0) {
214:                                    storeInterestData(pickInfo, flags, geom,
215:                                            geomIndex, vtxIndexArr, iPnt,
216:                                            sdist[0]);
217:                                }
218:                            }
219:                            pnts[0].set(pnts[1]);
220:                            vtxIndexArr[0] = vtxIndexArr[1];
221:                        }
222:                    }
223:                    break;
224:                case PickShape.PICKBOUNDINGPOLYTOPE:
225:                    BoundingPolytope bpolytope = (BoundingPolytope) ((PickBounds) pickShape).bounds;
226:
227:                    while (i < stripVertexCounts.length) {
228:                        j = stripStartVertexIndices[i];
229:                        end = j + stripVertexCounts[i++];
230:                        vtxIndexArr[0] = j;
231:                        getVertexData(j++, pnts[0]);
232:                        while (j < end) {
233:                            vtxIndexArr[1] = j;
234:                            getVertexData(j++, pnts[1]);
235:                            if (intersectBoundingPolytope(pnts, bpolytope,
236:                                    sdist, iPnt)) {
237:                                if (flags == 0) {
238:                                    return true;
239:                                }
240:                                if (sdist[0] < minDist) {
241:                                    minDist = sdist[0];
242:                                    x = iPnt.x;
243:                                    y = iPnt.y;
244:                                    z = iPnt.z;
245:                                    if ((flags & PickInfo.CLOSEST_GEOM_INFO) != 0) {
246:                                        storeInterestData(pickInfo, flags,
247:                                                geom, geomIndex, vtxIndexArr,
248:                                                iPnt, sdist[0]);
249:                                    }
250:                                }
251:                                if ((flags & PickInfo.ALL_GEOM_INFO) != 0) {
252:                                    storeInterestData(pickInfo, flags, geom,
253:                                            geomIndex, vtxIndexArr, iPnt,
254:                                            sdist[0]);
255:                                }
256:                            }
257:                            pnts[0].set(pnts[1]);
258:                            vtxIndexArr[0] = vtxIndexArr[1];
259:                        }
260:                    }
261:                    break;
262:                case PickShape.PICKCYLINDER:
263:                    PickCylinder pickCylinder = (PickCylinder) pickShape;
264:
265:                    while (i < stripVertexCounts.length) {
266:                        j = stripStartVertexIndices[i];
267:                        end = j + stripVertexCounts[i++];
268:                        vtxIndexArr[0] = j;
269:                        getVertexData(j++, pnts[0]);
270:                        while (j < end) {
271:                            vtxIndexArr[1] = j;
272:                            getVertexData(j++, pnts[1]);
273:                            if (intersectCylinder(pnts, pickCylinder, sdist,
274:                                    iPnt)) {
275:                                if (flags == 0) {
276:                                    return true;
277:                                }
278:                                if (sdist[0] < minDist) {
279:                                    minDist = sdist[0];
280:                                    x = iPnt.x;
281:                                    y = iPnt.y;
282:                                    z = iPnt.z;
283:                                    if ((flags & PickInfo.CLOSEST_GEOM_INFO) != 0) {
284:                                        storeInterestData(pickInfo, flags,
285:                                                geom, geomIndex, vtxIndexArr,
286:                                                iPnt, sdist[0]);
287:                                    }
288:                                }
289:                                if ((flags & PickInfo.ALL_GEOM_INFO) != 0) {
290:                                    storeInterestData(pickInfo, flags, geom,
291:                                            geomIndex, vtxIndexArr, iPnt,
292:                                            sdist[0]);
293:                                }
294:                            }
295:                            pnts[0].set(pnts[1]);
296:                            vtxIndexArr[0] = vtxIndexArr[1];
297:                        }
298:                    }
299:                    break;
300:                case PickShape.PICKCONE:
301:                    PickCone pickCone = (PickCone) pickShape;
302:
303:                    while (i < stripVertexCounts.length) {
304:                        j = stripStartVertexIndices[i];
305:                        end = j + stripVertexCounts[i++];
306:                        vtxIndexArr[0] = j;
307:                        getVertexData(j++, pnts[0]);
308:                        while (j < end) {
309:                            vtxIndexArr[1] = j;
310:                            getVertexData(j++, pnts[1]);
311:                            if (intersectCone(pnts, pickCone, sdist, iPnt)) {
312:                                if (flags == 0) {
313:                                    return true;
314:                                }
315:                                if (sdist[0] < minDist) {
316:                                    minDist = sdist[0];
317:                                    x = iPnt.x;
318:                                    y = iPnt.y;
319:                                    z = iPnt.z;
320:                                    if ((flags & PickInfo.CLOSEST_GEOM_INFO) != 0) {
321:                                        storeInterestData(pickInfo, flags,
322:                                                geom, geomIndex, vtxIndexArr,
323:                                                iPnt, sdist[0]);
324:                                    }
325:                                }
326:                                if ((flags & PickInfo.ALL_GEOM_INFO) != 0) {
327:                                    storeInterestData(pickInfo, flags, geom,
328:                                            geomIndex, vtxIndexArr, iPnt,
329:                                            sdist[0]);
330:                                }
331:                            }
332:                            pnts[0].set(pnts[1]);
333:                            vtxIndexArr[0] = vtxIndexArr[1];
334:                        }
335:                    }
336:                    break;
337:                case PickShape.PICKPOINT:
338:                    // Should not happen since API already check for this
339:                    throw new IllegalArgumentException(J3dI18N
340:                            .getString("LineStripArrayRetained0"));
341:                default:
342:                    throw new RuntimeException(
343:                            "PickShape not supported for intersection");
344:                }
345:
346:                if (minDist < Double.MAX_VALUE) {
347:                    iPnt.x = x;
348:                    iPnt.y = y;
349:                    iPnt.z = z;
350:                    return true;
351:                }
352:                return false;
353:            }
354:
355:            boolean intersect(Point3d[] pnts) {
356:                int j, end;
357:                Point3d[] points = new Point3d[2];
358:                double dist[] = new double[1];
359:                Vector3d dir;
360:                int i = 0;
361:
362:                points[0] = new Point3d();
363:                points[1] = new Point3d();
364:
365:                switch (pnts.length) {
366:                case 3:
367:                case 4: // Triangle, Quad
368:                    while (i < stripVertexCounts.length) {
369:                        j = stripStartVertexIndices[i];
370:                        end = j + stripVertexCounts[i++];
371:                        getVertexData(j++, points[0]);
372:                        while (j < end) {
373:                            getVertexData(j++, points[1]);
374:                            if (intersectSegment(pnts, points[0], points[1],
375:                                    dist, null)) {
376:                                return true;
377:                            }
378:                            points[0].set(points[1]);
379:                        }
380:                    }
381:                    break;
382:                case 2: // Line
383:                    dir = new Vector3d();
384:                    while (i < stripVertexCounts.length) {
385:                        j = stripStartVertexIndices[i];
386:                        end = j + stripVertexCounts[i++];
387:                        getVertexData(j++, points[0]);
388:                        while (j < end) {
389:                            getVertexData(j++, points[1]);
390:                            dir.x = points[1].x - points[0].x;
391:                            dir.y = points[1].y - points[0].y;
392:                            dir.z = points[1].z - points[0].z;
393:                            if (intersectLineAndRay(pnts[0], pnts[1],
394:                                    points[0], dir, dist, null)
395:                                    && (dist[0] <= 1.0)) {
396:                                return true;
397:                            }
398:                            points[0].set(points[1]);
399:                        }
400:                    }
401:                    break;
402:                case 1: // Point
403:                    dir = new Vector3d();
404:                    while (i < stripVertexCounts.length) {
405:                        j = stripStartVertexIndices[i];
406:                        end = j + stripVertexCounts[i++];
407:                        getVertexData(j++, points[0]);
408:                        while (j < end) {
409:                            getVertexData(j++, points[1]);
410:                            dir.x = points[1].x - points[0].x;
411:                            dir.y = points[1].y - points[0].y;
412:                            dir.z = points[1].z - points[0].z;
413:                            if (intersectPntAndRay(pnts[0], points[0], dir,
414:                                    dist)
415:                                    && (dist[0] <= 1.0)) {
416:                                return true;
417:                            }
418:                            points[0].set(points[1]);
419:                        }
420:                    }
421:                    break;
422:                }
423:                return false;
424:            }
425:
426:            boolean intersect(Transform3D this ToOtherVworld,
427:                    GeometryRetained geom) {
428:                int i = 0;
429:                int j, end;
430:                Point3d[] pnts = new Point3d[2];
431:                pnts[0] = new Point3d();
432:                pnts[1] = new Point3d();
433:
434:                while (i < stripVertexCounts.length) {
435:                    j = stripStartVertexIndices[i];
436:                    end = j + stripVertexCounts[i++];
437:                    getVertexData(j++, pnts[0]);
438:                    this ToOtherVworld.transform(pnts[0]);
439:                    while (j < end) {
440:                        getVertexData(j++, pnts[1]);
441:                        this ToOtherVworld.transform(pnts[1]);
442:                        if (geom.intersect(pnts)) {
443:                            return true;
444:                        }
445:                        pnts[0].set(pnts[1]);
446:                    }
447:                }
448:                return false;
449:            }
450:
451:            // the bounds argument is already transformed
452:            boolean intersect(Bounds targetBound) {
453:                int i = 0;
454:                int j, offset, end;
455:                Point3d[] pnts = new Point3d[2];
456:                pnts[0] = new Point3d();
457:                pnts[1] = new Point3d();
458:
459:                switch (targetBound.getPickType()) {
460:                case PickShape.PICKBOUNDINGBOX:
461:                    BoundingBox box = (BoundingBox) targetBound;
462:
463:                    while (i < stripVertexCounts.length) {
464:                        j = stripStartVertexIndices[i];
465:                        end = j + stripVertexCounts[i++];
466:                        getVertexData(j++, pnts[0]);
467:                        while (j < end) {
468:                            getVertexData(j++, pnts[1]);
469:                            if (intersectBoundingBox(pnts, box, null, null)) {
470:                                return true;
471:                            }
472:                            pnts[0].set(pnts[1]);
473:                        }
474:                    }
475:                    break;
476:                case PickShape.PICKBOUNDINGSPHERE:
477:                    BoundingSphere bsphere = (BoundingSphere) targetBound;
478:                    while (i < stripVertexCounts.length) {
479:                        j = stripStartVertexIndices[i];
480:                        end = j + stripVertexCounts[i++];
481:                        getVertexData(j++, pnts[0]);
482:                        while (j < end) {
483:                            getVertexData(j++, pnts[1]);
484:                            if (intersectBoundingSphere(pnts, bsphere, null,
485:                                    null)) {
486:                                return true;
487:                            }
488:                            pnts[0].set(pnts[1]);
489:                        }
490:                    }
491:                    break;
492:                case PickShape.PICKBOUNDINGPOLYTOPE:
493:                    BoundingPolytope bpolytope = (BoundingPolytope) targetBound;
494:
495:                    while (i < stripVertexCounts.length) {
496:                        j = stripStartVertexIndices[i];
497:                        end = j + stripVertexCounts[i++];
498:                        getVertexData(j++, pnts[0]);
499:                        while (j < end) {
500:                            getVertexData(j++, pnts[1]);
501:                            if (intersectBoundingPolytope(pnts, bpolytope,
502:                                    null, null)) {
503:                                return true;
504:                            }
505:                            pnts[0].set(pnts[1]);
506:                        }
507:                    }
508:                    break;
509:                default:
510:                    throw new RuntimeException(
511:                            "Bounds not supported for intersection "
512:                                    + targetBound);
513:                }
514:
515:                return false;
516:            }
517:
518:            // From Graphics Gems IV (pg5) and Graphics Gems II, Pg170
519:            void computeCentroid() {
520:                int i = 0;
521:                int j;
522:                double length;
523:                double totallength = 0;
524:                int start, end;
525:                boolean replaceVertex1;
526:                Point3d pnt0 = new Point3d();
527:                Point3d pnt1 = new Point3d();
528:
529:                centroid.x = 0;
530:                centroid.y = 0;
531:                centroid.z = 0;
532:
533:                while (i < stripVertexCounts.length) {
534:                    j = stripStartVertexIndices[i];
535:                    end = j + stripVertexCounts[i++];
536:                    getVertexData(j++, pnt0);
537:                    replaceVertex1 = true;
538:                    while (j < end) {
539:                        if (replaceVertex1) {
540:                            getVertexData(j++, pnt1);
541:                            replaceVertex1 = false;
542:                        } else {
543:                            getVertexData(j++, pnt0);
544:                            replaceVertex1 = true;
545:                        }
546:                        length = pnt0.distance(pnt1);
547:                        centroid.x += (pnt0.x + pnt1.x) * length;
548:                        centroid.y += (pnt0.y + pnt1.y) * length;
549:                        centroid.z += (pnt0.z + pnt1.z) * length;
550:                        totallength += length;
551:                    }
552:                }
553:                if (totallength != 0.0) {
554:                    length = 1.0 / (2.0 * totallength);
555:                    centroid.x *= length;
556:                    centroid.y *= length;
557:                    centroid.z *= length;
558:                }
559:            }
560:
561:            int getClassType() {
562:                return LINE_TYPE;
563:            }
564:
565:        }
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