Source Code Cross Referenced for KeyNavigator.java in  » 6.0-JDK-Modules » java-3d » com » sun » j3d » utils » behaviors » keyboard » 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 » com.sun.j3d.utils.behaviors.keyboard 
Source Cross Referenced  Class Diagram Java Document (Java Doc) 


001:        /*
002:         * $RCSfile: KeyNavigator.java,v $
003:         *
004:         * Copyright (c) 2007 Sun Microsystems, Inc. All rights reserved.
005:         *
006:         * Redistribution and use in source and binary forms, with or without
007:         * modification, are permitted provided that the following conditions
008:         * are met:
009:         *
010:         * - Redistribution of source code must retain the above copyright
011:         *   notice, this list of conditions and the following disclaimer.
012:         *
013:         * - Redistribution in binary form must reproduce the above copyright
014:         *   notice, this list of conditions and the following disclaimer in
015:         *   the documentation and/or other materials provided with the
016:         *   distribution.
017:         *
018:         * Neither the name of Sun Microsystems, Inc. or the names of
019:         * contributors may be used to endorse or promote products derived
020:         * from this software without specific prior written permission.
021:         *
022:         * This software is provided "AS IS," without a warranty of any
023:         * kind. ALL EXPRESS OR IMPLIED CONDITIONS, REPRESENTATIONS AND
024:         * WARRANTIES, INCLUDING ANY IMPLIED WARRANTY OF MERCHANTABILITY,
025:         * FITNESS FOR A PARTICULAR PURPOSE OR NON-INFRINGEMENT, ARE HEREBY
026:         * EXCLUDED. SUN MICROSYSTEMS, INC. ("SUN") AND ITS LICENSORS SHALL
027:         * NOT BE LIABLE FOR ANY DAMAGES SUFFERED BY LICENSEE AS A RESULT OF
028:         * USING, MODIFYING OR DISTRIBUTING THIS SOFTWARE OR ITS
029:         * DERIVATIVES. IN NO EVENT WILL SUN OR ITS LICENSORS BE LIABLE FOR
030:         * ANY LOST REVENUE, PROFIT OR DATA, OR FOR DIRECT, INDIRECT, SPECIAL,
031:         * CONSEQUENTIAL, INCIDENTAL OR PUNITIVE DAMAGES, HOWEVER CAUSED AND
032:         * REGARDLESS OF THE THEORY OF LIABILITY, ARISING OUT OF THE USE OF OR
033:         * INABILITY TO USE THIS SOFTWARE, EVEN IF SUN HAS BEEN ADVISED OF THE
034:         * POSSIBILITY OF SUCH DAMAGES.
035:         *
036:         * You acknowledge that this software is not designed, licensed or
037:         * intended for use in the design, construction, operation or
038:         * maintenance of any nuclear facility.
039:         *
040:         * $Revision: 1.4 $
041:         * $Date: 2007/02/09 17:20:12 $
042:         * $State: Exp $
043:         */
044:
045:        package com.sun.j3d.utils.behaviors.keyboard;
046:
047:        import java.io.*;
048:        import java.util.*;
049:        import javax.media.j3d.*;
050:        import javax.vecmath.*;
051:        import java.awt.event.*;
052:
053:        /**
054:         * This is the KeyNavigator class.  It accumulates AWT key events (key
055:         * press and key release) and computes a new transform based on the
056:         * accumulated events and elapsed time.
057:         */
058:        public class KeyNavigator {
059:
060:            private Vector3d navVec;
061:            private long time;
062:
063:            private Vector3d fwdAcc;
064:            private Vector3d bwdAcc;
065:            private Vector3d leftAcc;
066:            private Vector3d rightAcc;
067:            private Vector3d upAcc;
068:            private Vector3d downAcc;
069:
070:            private Vector3d fwdDrag;
071:            private Vector3d bwdDrag;
072:            private Vector3d leftDrag;
073:            private Vector3d rightDrag;
074:            private Vector3d upDrag;
075:            private Vector3d downDrag;
076:
077:            private double fwdVMax;
078:            private double bwdVMax;
079:            private double leftVMax;
080:            private double rightVMax;
081:            private double upVMax;
082:            private double downVMax;
083:
084:            private float leftRotAngle;
085:            private float rightRotAngle;
086:            private float upRotAngle;
087:            private float downRotAngle;
088:
089:            private double mmx;
090:
091:            private Vector3d a = new Vector3d();
092:            private Vector3d dv = new Vector3d();
093:            private Point3d dp = new Point3d();
094:            private Quat4d udQuat = new Quat4d();
095:            private Quat4d lrQuat = new Quat4d();
096:            private Vector3d vpPos = new Vector3d();
097:            private double vpScale;
098:            private Quat4d vpQuat = new Quat4d();
099:            private Matrix4d vpMatrix = new Matrix4d();
100:            private Transform3D vpTrans = new Transform3D();
101:            private Matrix4d mat = new Matrix4d();
102:            private Vector3d nda = new Vector3d();
103:            private Vector3d temp = new Vector3d();
104:            private Transform3D nominal = new Transform3D();
105:            private TransformGroup targetTG;
106:
107:            private static final int UP_ARROW = (1 << 0);
108:            private static final int DOWN_ARROW = (1 << 1);
109:            private static final int LEFT_ARROW = (1 << 2);
110:            private static final int RIGHT_ARROW = (1 << 3);
111:            private static final int PLUS_SIGN = (1 << 4);
112:            private static final int MINUS_SIGN = (1 << 5);
113:            private static final int PAGE_UP = (1 << 6);
114:            private static final int PAGE_DOWN = (1 << 7);
115:            private static final int HOME_DIR = (1 << 8);
116:            private static final int HOME_NOMINAL = (1 << 9);
117:
118:            private static final int SHIFT = (1 << 10);
119:            private static final int ALT = (1 << 11);
120:            private static final int META = (1 << 12);
121:
122:            private static final int KEY_UP = (1 << 13);
123:            private static final int KEY_DOWN = (1 << 14);
124:
125:            private int key_state = 0;
126:            private int modifier_key_state = 0;
127:
128:            /**
129:             * Constructs a new key navigator object that operates on the specified
130:             * transform group.  All parameters are set to their default, idle state.
131:             * @param targetTG the target transform group
132:             */
133:            public KeyNavigator(TransformGroup targetTG) {
134:                this .targetTG = targetTG;
135:                targetTG.getTransform(nominal);
136:
137:                mmx = 128.0;
138:                navVec = new Vector3d(0.0, 0.0, 0.0);
139:
140:                fwdAcc = new Vector3d(0.0, 0.0, -mmx);
141:                bwdAcc = new Vector3d(0.0, 0.0, mmx);
142:                leftAcc = new Vector3d(-mmx, 0.0, 0.0);
143:                rightAcc = new Vector3d(mmx, 0.0, 0.0);
144:                upAcc = new Vector3d(0.0, mmx, 0.0);
145:                downAcc = new Vector3d(0.0, -mmx, 0.0);
146:
147:                fwdDrag = new Vector3d(0.0, 0.0, mmx);
148:                bwdDrag = new Vector3d(0.0, 0.0, -mmx);
149:                leftDrag = new Vector3d(mmx, 0.0, 0.0);
150:                rightDrag = new Vector3d(-mmx, 0.0, 0.0);
151:                upDrag = new Vector3d(0.0, -mmx, 0.0);
152:                downDrag = new Vector3d(0.0, mmx, 0.0);
153:
154:                fwdVMax = -mmx;
155:                bwdVMax = mmx;
156:                leftVMax = -mmx;
157:                rightVMax = mmx;
158:                upVMax = mmx;
159:                downVMax = -mmx;
160:
161:                leftRotAngle = (float) (-Math.PI * 2.0 / 3.0);
162:                rightRotAngle = (float) (Math.PI * 2.0 / 3.0);
163:                upRotAngle = (float) (Math.PI * 2.0 / 3.0);
164:                downRotAngle = (float) (-Math.PI * 2.0 / 3.0);
165:
166:                // Create Timer here.
167:                time = System.currentTimeMillis();
168:
169:            }
170:
171:            private long getDeltaTime() {
172:                long newTime = System.currentTimeMillis();
173:                long deltaTime = newTime - time;
174:                time = newTime;
175:                if (deltaTime > 2000)
176:                    return 0;
177:                else
178:                    return deltaTime;
179:            }
180:
181:            /* Generate a quaterion as a rotation of radians av about 0/x 1/y 2/z axis */
182:            private void genRotQuat(double av, int axis, Quat4d q) {
183:                double b;
184:
185:                q.x = q.y = q.z = 0.0;
186:                q.w = Math.cos(av / 2.0);
187:
188:                b = 1.0 - q.w * q.w;
189:
190:                if (b > 0.0)
191:                    b = Math.sqrt(b);
192:                else
193:                    return;
194:
195:                if (av < 0.0)
196:                    b = -b;
197:                if (axis == 0)
198:                    q.x = b;
199:                else if (axis == 1)
200:                    q.y = b;
201:                else
202:                    q.z = b;
203:
204:            }
205:
206:            private void accKeyAdd(Vector3d a, Vector3d da, Vector3d drag,
207:                    double scaleVel) {
208:
209:                /* Scaling of acceleration due to modification keys */
210:                nda.scale(scaleVel, da);
211:                /* Addition of sufficent acceleration to counteract drag */
212:                nda.sub(drag);
213:
214:                /* Summing into overall acceleration */
215:                a.add(nda);
216:
217:            }
218:
219:            /**
220:             * Computes a new transform for the next frame based on
221:             * the current transform, accumulated keyboard inputs, and
222:             * elapsed time.  This new transform is written into the target
223:             * transform group.
224:             * This method should be called once per frame.
225:             */
226:            public void integrateTransformChanges() {
227:                double scaleVel, scaleRot, scaleScale, pre;
228:                double udAng, lrAng, r;
229:
230:                // Get the current View Platform transform into a transform3D object.
231:                targetTG.getTransform(vpTrans);
232:                // Extract the position, quaterion, and scale from the transform3D.
233:                vpScale = vpTrans.get(vpQuat, vpPos);
234:
235:                double deltaTime = (double) getDeltaTime();
236:                deltaTime *= 0.001;
237:
238:                /* Calculate scale due to modification keys */
239:                if ((modifier_key_state & SHIFT) != 0
240:                        && (modifier_key_state & META) == 0) {
241:                    scaleVel = 3.0;
242:                    scaleRot = 2.0;
243:                    scaleScale = 4.0;
244:                } else if ((modifier_key_state & SHIFT) == 0
245:                        && (modifier_key_state & META) != 0) {
246:                    scaleVel = 0.1;
247:                    scaleRot = 0.1;
248:                    scaleScale = 0.1;
249:                } else if ((modifier_key_state & SHIFT) != 0
250:                        && (modifier_key_state & META) != 0) {
251:                    scaleVel = 0.3;
252:                    scaleRot = 0.5;
253:                    scaleScale = 0.1;
254:                } else {
255:                    scaleRot = scaleVel = 1.0;
256:                    scaleScale = 4.0;
257:                }
258:
259:                /*
260:                 *  Processing of rectiliear motion keys.
261:                 */
262:
263:                a.x = a.y = a.z = 0.0; /* acceleration initially 0 */
264:
265:                /* Acceleration due to keys being down */
266:                if ((key_state & UP_ARROW) != 0
267:                        && (key_state & DOWN_ARROW) == 0)
268:                    accKeyAdd(a, fwdAcc, fwdDrag, scaleVel);
269:                else if ((key_state & UP_ARROW) == 0
270:                        && (key_state & DOWN_ARROW) != 0)
271:                    accKeyAdd(a, bwdAcc, bwdDrag, scaleVel);
272:
273:                if (((modifier_key_state & ALT) != 0)
274:                        && (key_state & LEFT_ARROW) != 0
275:                        && (key_state & RIGHT_ARROW) == 0) {
276:                    accKeyAdd(a, leftAcc, leftDrag, scaleVel);
277:                } else if (((modifier_key_state & ALT) != 0)
278:                        && (key_state & LEFT_ARROW) == 0
279:                        && (key_state & RIGHT_ARROW) != 0)
280:                    accKeyAdd(a, rightAcc, rightDrag, scaleVel);
281:
282:                if (((modifier_key_state & ALT) != 0)
283:                        && (key_state & PAGE_UP) != 0
284:                        && (key_state & PAGE_DOWN) == 0)
285:                    accKeyAdd(a, upAcc, upDrag, scaleVel);
286:                else if (((modifier_key_state & ALT) != 0)
287:                        && (key_state & PAGE_UP) == 0
288:                        && (key_state & PAGE_DOWN) != 0)
289:                    accKeyAdd(a, downAcc, downDrag, scaleVel);
290:
291:                /*
292:                 *  Drag due to new or existing motion
293:                 */
294:                pre = navVec.z + a.z * deltaTime;
295:                if (pre < 0.0) {
296:                    if (pre + fwdDrag.z * deltaTime < 0.0)
297:                        a.add(fwdDrag);
298:                    else
299:                        a.z -= pre / deltaTime;
300:                } else if (pre > 0.0) {
301:                    if (pre + bwdDrag.z * deltaTime > 0.0)
302:                        a.add(bwdDrag);
303:                    else
304:                        a.z -= pre / deltaTime;
305:                }
306:
307:                pre = navVec.x + a.x * deltaTime;
308:                if (pre < 0.0) {
309:                    if (pre + leftDrag.x * deltaTime < 0.0)
310:                        a.add(leftDrag);
311:                    else
312:                        a.x -= pre / deltaTime;
313:                } else if (pre > 0.0) {
314:                    if (pre + rightDrag.x * deltaTime > 0.0)
315:                        a.add(rightDrag);
316:                    else
317:                        a.x -= pre / deltaTime;
318:                }
319:
320:                pre = navVec.y + a.y * deltaTime;
321:                if (pre < 0.0) {
322:                    if (pre + downDrag.y * deltaTime < 0.0)
323:                        a.add(downDrag);
324:                    else
325:                        a.y -= pre / deltaTime;
326:                } else if (pre > 0.0) {
327:                    if (pre + upDrag.y * deltaTime > 0.0)
328:                        a.add(upDrag);
329:                    else
330:                        a.y -= pre / deltaTime;
331:                }
332:
333:                /* Integration of acceleration to velocity */
334:                dv.scale(deltaTime, a);
335:                navVec.add(dv);
336:
337:                /* Speed limits */
338:                if (navVec.z < scaleVel * fwdVMax)
339:                    navVec.z = scaleVel * fwdVMax;
340:                if (navVec.z > scaleVel * bwdVMax)
341:                    navVec.z = scaleVel * bwdVMax;
342:                if (navVec.x < scaleVel * leftVMax)
343:                    navVec.x = scaleVel * leftVMax;
344:                if (navVec.x > scaleVel * rightVMax)
345:                    navVec.x = scaleVel * rightVMax;
346:                if (navVec.y > scaleVel * upVMax)
347:                    navVec.y = scaleVel * upVMax;
348:                if (navVec.y < scaleVel * downVMax)
349:                    navVec.y = scaleVel * downVMax;
350:
351:                /* Integration of velocity to distance */
352:                dp.scale(deltaTime, navVec);
353:
354:                /* Scale our motion to the current avatar scale */
355:                // 1.0 eventually needs to be a more complex value (see hs).
356:                //      r = workplace_coexistence_to_vworld_ori.scale/
357:                //	one_to_one_coexistence_to_vworld_ori.scale;
358:                r = vpScale / 1.0;
359:                dp.scale(r, dp);
360:
361:                /*
362:                 *  Processing of rotation motion keys.
363:                 */
364:                udAng = lrAng = 0.0;
365:
366:                /* Rotation due to keys being down */
367:                if (((modifier_key_state & ALT) == 0)
368:                        && (key_state & LEFT_ARROW) != 0
369:                        && (key_state & RIGHT_ARROW) == 0)
370:                    lrAng = (double) leftRotAngle;
371:                else if (((modifier_key_state & ALT) == 0)
372:                        && (key_state & LEFT_ARROW) == 0
373:                        && (key_state & RIGHT_ARROW) != 0)
374:                    lrAng = (double) rightRotAngle;
375:
376:                if (((modifier_key_state & ALT) == 0)
377:                        && (key_state & PAGE_UP) != 0
378:                        && (key_state & PAGE_DOWN) == 0)
379:                    udAng = (double) upRotAngle;
380:                else if (((modifier_key_state & ALT) == 0)
381:                        && (key_state & PAGE_UP) == 0
382:                        && (key_state & PAGE_DOWN) != 0)
383:                    udAng = (double) downRotAngle;
384:
385:                lrAng *= scaleRot;
386:                udAng *= scaleRot;
387:
388:                /* Scaling of angle change to delta time */
389:                lrAng *= deltaTime;
390:                udAng *= deltaTime;
391:
392:                /* Addition to existing orientation */
393:                // vr_quat_inverse(&workplace_coexistence_to_vworld_ori.quat, &vpQuat);
394:                // vpQuat gotten at top of method.
395:                vpQuat.inverse();
396:
397:                if (lrAng != 0.0) {
398:                    genRotQuat(lrAng, 1, lrQuat);
399:                    vpQuat.mul(lrQuat, vpQuat);
400:                }
401:
402:                if (udAng != 0.0) {
403:                    genRotQuat(udAng, 0, udQuat);
404:                    vpQuat.mul(udQuat, vpQuat);
405:                }
406:
407:                /* Rotation of distance vector */
408:                vpQuat.inverse();
409:                vpQuat.normalize(); /* Improvment over HoloSketch */
410:                mat.set(vpQuat);
411:                mat.transform(dp);
412:
413:                /* Processing of scale */
414:                if ((key_state & PLUS_SIGN) != 0) {
415:                    vpScale *= (1.0 + (scaleScale * deltaTime));
416:                    if (vpScale > 10e+14)
417:                        vpScale = 1.0;
418:                } else if ((key_state & MINUS_SIGN) != 0) {
419:                    vpScale /= (1.0 + (scaleScale * deltaTime));
420:                    if (vpScale < 10e-14)
421:                        vpScale = 1.0;
422:                }
423:
424:                // add dp into current vp position.
425:                vpPos.add(dp);
426:
427:                if ((key_state & HOME_NOMINAL) != 0) {
428:                    resetVelocity();
429:                    // Extract the position, quaterion, and scale from the nominal
430:                    // transform
431:                    vpScale = nominal.get(vpQuat, vpPos);
432:                }
433:
434:                /* Final update of view platform */
435:                // Put the transform back into the transform group.
436:                vpTrans.set(vpQuat, vpPos, vpScale);
437:                targetTG.setTransform(vpTrans);
438:            }
439:
440:            /**
441:             * Resets the keyboard navigation velocity to 0.
442:             */
443:            private void resetVelocity() {
444:                navVec.x = navVec.y = navVec.z = 0.0;
445:            }
446:
447:            /**
448:             * Processed a keyboard event.  This routine should be called
449:             * every time a KEY_PRESSED or KEY_RELEASED event is received.
450:             * @param keyEvent the AWT key event
451:             */
452:            public void processKeyEvent(KeyEvent keyEvent) {
453:                int keyCode = keyEvent.getKeyCode();
454:                int keyChar = keyEvent.getKeyChar();
455:
456:                //System.err.println("keyCode " + keyCode + "  keyChar " + keyChar);
457:
458:                if (keyEvent.getID() == KeyEvent.KEY_RELEASED) {
459:                    if (keyChar == '+')
460:                        key_state &= ~PLUS_SIGN;
461:                    else
462:                        switch (keyCode) {
463:                        case KeyEvent.VK_UP:
464:                            key_state &= ~UP_ARROW;
465:                            break;
466:                        case KeyEvent.VK_DOWN:
467:                            key_state &= ~DOWN_ARROW;
468:                            break;
469:                        case KeyEvent.VK_LEFT:
470:                            key_state &= ~LEFT_ARROW;
471:                            break;
472:                        case KeyEvent.VK_RIGHT:
473:                            key_state &= ~RIGHT_ARROW;
474:                            break;
475:                        case KeyEvent.VK_PAGE_UP:
476:                            key_state &= ~PAGE_UP;
477:                            break;
478:                        case KeyEvent.VK_PAGE_DOWN:
479:                            key_state &= ~PAGE_DOWN;
480:                            break;
481:                        case KeyEvent.VK_EQUALS:
482:                            key_state &= ~HOME_NOMINAL;
483:                            break;
484:                        default:
485:                            switch (keyChar) {
486:                            case '-':
487:                                key_state &= ~MINUS_SIGN;
488:                                break;
489:                            }
490:                        }
491:                } else if (keyEvent.getID() == KeyEvent.KEY_PRESSED) {
492:                    if (keyChar == '+')
493:                        key_state |= PLUS_SIGN;
494:                    switch (keyCode) {
495:                    case KeyEvent.VK_UP:
496:                        key_state |= UP_ARROW;
497:                        break;
498:                    case KeyEvent.VK_DOWN:
499:                        key_state |= DOWN_ARROW;
500:                        break;
501:                    case KeyEvent.VK_LEFT:
502:                        key_state |= LEFT_ARROW;
503:                        break;
504:                    case KeyEvent.VK_RIGHT:
505:                        key_state |= RIGHT_ARROW;
506:                        break;
507:                    case KeyEvent.VK_PAGE_UP:
508:                        key_state |= PAGE_UP;
509:                        break;
510:                    case KeyEvent.VK_PAGE_DOWN:
511:                        key_state |= PAGE_DOWN;
512:                        break;
513:                    case KeyEvent.VK_EQUALS:
514:                        key_state |= HOME_NOMINAL;
515:                        break;
516:                    default:
517:                        switch (keyChar) {
518:                        case '-':
519:                            key_state |= MINUS_SIGN;
520:                            break;
521:                        }
522:                    }
523:                }
524:
525:                /* Check modifier keys */
526:                if (keyEvent.isShiftDown())
527:                    modifier_key_state |= SHIFT;
528:                else
529:                    modifier_key_state &= ~SHIFT;
530:
531:                if (keyEvent.isMetaDown())
532:                    modifier_key_state |= META;
533:                else
534:                    modifier_key_state &= ~META;
535:
536:                if (keyEvent.isAltDown())
537:                    modifier_key_state |= ALT;
538:                else
539:                    modifier_key_state &= ~ALT;
540:
541:                //System.err.println("keyCode " + keyEvent.getKeyCode() + "  modifiers " + keyEvent.getModifiers());
542:                //System.err.println("SHIFT_MASK " + keyEvent.SHIFT_MASK);
543:                //System.err.println("CTRL_MASK " + keyEvent.CTRL_MASK);
544:                //System.err.println("META_MASK " + keyEvent.META_MASK);
545:                //System.err.println("ALT_MASK " + keyEvent.ALT_MASK);
546:
547:            }
548:        }
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