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


001:        /*
002:         * $RCSfile: ConfigSexpression.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: 1.5 $
041:         * $Date: 2007/02/09 17:20:44 $
042:         * $State: Exp $
043:         */
044:
045:        package com.sun.j3d.utils.universe;
046:
047:        import java.awt.event.*;
048:        import java.io.*;
049:        import java.lang.Integer;
050:        import java.lang.Boolean;
051:        import java.util.*;
052:        import javax.vecmath.*;
053:        import javax.media.j3d.*;
054:
055:        class ConfigSexpression {
056:
057:            private ArrayList elements = new ArrayList();
058:
059:            private void syntaxError(StreamTokenizer st, String file, String s) {
060:                System.out.println(s + ":\nat line " + st.lineno() + " in "
061:                        + file);
062:                print();
063:                System.out.print("\n\n");
064:            }
065:
066:            private int myNextToken(StreamTokenizer st, String file) {
067:                int tok = 0;
068:                try {
069:                    tok = st.nextToken();
070:                } catch (IOException e) {
071:                    throw new RuntimeException(e + "\nwhile reading " + file);
072:                }
073:                return tok;
074:            }
075:
076:            Object parseAndEval(ConfigContainer configContainer,
077:                    StreamTokenizer st, int level) {
078:                int tok;
079:                String s;
080:                String file = configContainer.currentFileName;
081:
082:                //
083:                // First tokenize the character stream and add the tokens to the
084:                // elements array.
085:                //
086:                elements.clear();
087:
088:                // Look for an open paren to start this sexp.
089:                while (true) {
090:                    tok = myNextToken(st, file);
091:
092:                    if (tok == StreamTokenizer.TT_EOF)
093:                        return Boolean.FALSE;
094:
095:                    if (tok == ')')
096:                        syntaxError(st, file, "Premature closing parenthesis");
097:
098:                    if (tok == '(')
099:                        break;
100:                }
101:
102:                // Add elements until a close paren for this sexp is found.
103:                for (int i = 0; true; i++) {
104:                    tok = myNextToken(st, file);
105:
106:                    if (tok == StreamTokenizer.TT_EOF) {
107:                        syntaxError(st, file, "Missing closing parenthesis");
108:                        break;
109:                    }
110:
111:                    // An open paren starts a new embedded sexp.  Put the paren back,
112:                    // evaluate the sexp, and add the result to the elements list.
113:                    if (tok == '(') {
114:                        st.pushBack();
115:                        ConfigSexpression cs = new ConfigSexpression();
116:                        elements.add(cs.parseAndEval(configContainer, st,
117:                                level + 1));
118:                        continue;
119:                    }
120:
121:                    // A close paren finishes the scan.
122:                    if (tok == ')')
123:                        break;
124:
125:                    // Check for too many arguments.
126:                    if (i >= 20)
127:                        syntaxError(st, file, "Too many arguments");
128:
129:                    // Check for numeric argument.
130:                    if (tok == StreamTokenizer.TT_NUMBER) {
131:                        elements.add(new Double(st.nval));
132:                        continue;
133:                    }
134:
135:                    // Anything other than a word or a quoted string is an error.
136:                    if (tok != StreamTokenizer.TT_WORD && tok != '"'
137:                            && tok != '\'') {
138:                        String badToken = String.valueOf((char) tok);
139:                        elements.add(badToken); // so bad token prints out
140:                        syntaxError(st, file, "Invalid token \"" + badToken
141:                                + "\" must be enclosed in quotes");
142:                        continue;
143:                    }
144:
145:                    // Scan the token for Java property substitution syntax ${...}.
146:                    s = scanJavaProperties(st, file, st.sval);
147:                    if (s == null)
148:                        continue;
149:
150:                    if (s.equalsIgnoreCase("true"))
151:                        // Replace "true" or "True" with the Boolean equivalent.
152:                        elements.add(new Boolean(true));
153:
154:                    else if (s.equalsIgnoreCase("false"))
155:                        // Replace "false" or "False" with the Boolean equivalent.
156:                        elements.add(new Boolean(false));
157:
158:                    else
159:                        // Add the token as a string element.
160:                        elements.add(s);
161:                }
162:
163:                //
164:                // Now evaluate elements.
165:                //
166:                if (elements.size() == 0)
167:                    syntaxError(st, file, "Null command");
168:
169:                // If the first argument is a string, then this sexp must be
170:                // a top-level command or a built-in, and needs to be evaluated.
171:                if (elements.get(0) instanceof  String) {
172:                    try {
173:                        if (level == 0) {
174:                            configContainer.evaluateCommand(elements, st
175:                                    .lineno());
176:
177:                            // Continue parsing top-level commands.
178:                            return Boolean.TRUE;
179:                        } else {
180:                            // Evaluate built-in and return result to next level up.
181:                            return evaluateBuiltIn(configContainer, elements,
182:                                    st.lineno());
183:                        }
184:                    } catch (IllegalArgumentException e) {
185:                        syntaxError(st, file, e.getMessage());
186:                        if (level == 0)
187:                            // Command ignored: continue parsing.
188:                            return Boolean.TRUE;
189:                        else
190:                            // Function ignored: return sexp to next level up so error
191:                            // processing can print it out in context of command.
192:                            return this ;
193:                    }
194:                }
195:
196:                // If the first argument isn't a string, and we are at level 0,
197:                // this is a syntax error.
198:                if (level == 0)
199:                    syntaxError(st, file, "Malformed top-level command name");
200:
201:                // If the first argument is a number, then we must have
202:                // either a 2D, 3D, or 4D numeric vector.
203:                if (elements.get(0) instanceof  Double) {
204:                    if (elements.size() == 1)
205:                        syntaxError(st, file,
206:                                "Can't have single-element vector");
207:
208:                    // Point2D
209:                    if (elements.size() == 2) {
210:                        if (!(elements.get(1) instanceof  Double))
211:                            syntaxError(st, file,
212:                                    "Both elements must be numbers");
213:
214:                        return new Point2d(((Double) elements.get(0))
215:                                .doubleValue(), ((Double) elements.get(1))
216:                                .doubleValue());
217:                    }
218:
219:                    // Point3d
220:                    if (elements.size() == 3) {
221:                        if (!(elements.get(1) instanceof  Double)
222:                                || !(elements.get(2) instanceof  Double))
223:                            syntaxError(st, file,
224:                                    "All elements must be numbers");
225:
226:                        return new Point3d(((Double) elements.get(0))
227:                                .doubleValue(), ((Double) elements.get(1))
228:                                .doubleValue(), ((Double) elements.get(2))
229:                                .doubleValue());
230:                    }
231:
232:                    // Point4D
233:                    if (elements.size() == 4) {
234:                        if (!(elements.get(1) instanceof  Double)
235:                                || !(elements.get(2) instanceof  Double)
236:                                || !(elements.get(3) instanceof  Double))
237:                            syntaxError(st, file,
238:                                    "All elements must be numbers");
239:
240:                        return new Point4d(((Double) elements.get(0))
241:                                .doubleValue(), ((Double) elements.get(1))
242:                                .doubleValue(), ((Double) elements.get(2))
243:                                .doubleValue(), ((Double) elements.get(3))
244:                                .doubleValue());
245:                    }
246:
247:                    // Anything else is an error.
248:                    syntaxError(st, file, "Too many vector elements");
249:                }
250:
251:                // If the first argument is a Point3d, then we should be a Matrix3d.
252:                if (elements.get(0) instanceof  Point3d) {
253:                    if (elements.size() != 3)
254:                        syntaxError(st, file, "Matrix must have three rows");
255:
256:                    if (!(elements.get(1) instanceof  Point3d)
257:                            || !(elements.get(2) instanceof  Point3d))
258:                        syntaxError(st, file,
259:                                "All rows must have three elements");
260:
261:                    return new Matrix3d(((Point3d) elements.get(0)).x,
262:                            ((Point3d) elements.get(0)).y, ((Point3d) elements
263:                                    .get(0)).z, ((Point3d) elements.get(1)).x,
264:                            ((Point3d) elements.get(1)).y, ((Point3d) elements
265:                                    .get(1)).z, ((Point3d) elements.get(2)).x,
266:                            ((Point3d) elements.get(2)).y, ((Point3d) elements
267:                                    .get(2)).z);
268:                }
269:
270:                // If the first argument is a Point4d, then we should be a Matrix4d.
271:                if (elements.get(0) instanceof  Point4d) {
272:                    if (elements.size() == 3) {
273:                        if (!(elements.get(1) instanceof  Point4d)
274:                                || !(elements.get(2) instanceof  Point4d))
275:                            syntaxError(st, file,
276:                                    "All rows must have four elements");
277:
278:                        return new Matrix4d(((Point4d) elements.get(0)).x,
279:                                ((Point4d) elements.get(0)).y,
280:                                ((Point4d) elements.get(0)).z,
281:                                ((Point4d) elements.get(0)).w,
282:                                ((Point4d) elements.get(1)).x,
283:                                ((Point4d) elements.get(1)).y,
284:                                ((Point4d) elements.get(1)).z,
285:                                ((Point4d) elements.get(1)).w,
286:                                ((Point4d) elements.get(2)).x,
287:                                ((Point4d) elements.get(2)).y,
288:                                ((Point4d) elements.get(2)).z,
289:                                ((Point4d) elements.get(2)).w, 0.0, 0.0, 0.0,
290:                                1.0);
291:                    } else if (elements.size() != 4)
292:                        syntaxError(st, file,
293:                                "Matrix must have three or four rows");
294:
295:                    if (!(elements.get(1) instanceof  Point4d)
296:                            || !(elements.get(2) instanceof  Point4d)
297:                            || !(elements.get(3) instanceof  Point4d))
298:                        syntaxError(st, file,
299:                                "All rows must have four elements");
300:
301:                    return new Matrix4d(((Point4d) elements.get(0)).x,
302:                            ((Point4d) elements.get(0)).y, ((Point4d) elements
303:                                    .get(0)).z, ((Point4d) elements.get(0)).w,
304:                            ((Point4d) elements.get(1)).x, ((Point4d) elements
305:                                    .get(1)).y, ((Point4d) elements.get(1)).z,
306:                            ((Point4d) elements.get(1)).w, ((Point4d) elements
307:                                    .get(2)).x, ((Point4d) elements.get(2)).y,
308:                            ((Point4d) elements.get(2)).z, ((Point4d) elements
309:                                    .get(2)).w, ((Point4d) elements.get(3)).x,
310:                            ((Point4d) elements.get(3)).y, ((Point4d) elements
311:                                    .get(3)).z, ((Point4d) elements.get(3)).w);
312:                }
313:
314:                // Anything else is an error.
315:                syntaxError(st, file, "Syntax error");
316:                return null;
317:            }
318:
319:            /**
320:             * Scan for Java properties in the specified string.  Nested properties are
321:             * not supported.
322:             *
323:             * @param st stream tokenizer in use
324:             * @param f current file name
325:             * @param s string containing non-nested Java properties possibly
326:             *  interspersed with arbitrary text.
327:             * @return scanned string with Java properties replaced with values
328:             */
329:            private String scanJavaProperties(StreamTokenizer st, String f,
330:                    String s) {
331:                int open = s.indexOf("${");
332:                if (open == -1)
333:                    return s;
334:
335:                int close = 0;
336:                StringBuffer buf = new StringBuffer();
337:                while (open != -1) {
338:                    buf.append(s.substring(close, open));
339:                    close = s.indexOf('}', open);
340:                    if (close == -1) {
341:                        elements.add(s); // so that the bad element prints out
342:                        syntaxError(st, f,
343:                                "Java property substitution syntax error");
344:                        return null;
345:                    }
346:
347:                    String property = s.substring(open + 2, close);
348:                    String value = ConfigCommand.evaluateJavaProperty(property);
349:                    if (value == null) {
350:                        elements.add(s); // so that the bad element prints out
351:                        syntaxError(st, f, "Java property \"" + property
352:                                + "\" has a null value");
353:                        return null;
354:                    }
355:
356:                    buf.append(value);
357:                    open = s.indexOf("${", close);
358:                    close++;
359:                }
360:
361:                buf.append(s.substring(close));
362:                return buf.toString();
363:            }
364:
365:            /**
366:             * This method gets called from the s-expression parser to evaluate a
367:             * built-in command.
368:             * 
369:             * @param elements tokenized list of sexp elements
370:             * @return object representing result of evaluation
371:             */
372:            private Object evaluateBuiltIn(ConfigContainer configContainer,
373:                    ArrayList elements, int lineNumber) {
374:                int argc;
375:                String functionName;
376:
377:                argc = elements.size();
378:                functionName = (String) elements.get(0);
379:
380:                if (functionName.equals("Rotate")) {
381:                    return makeRotate(elements);
382:                } else if (functionName.equals("Translate")) {
383:                    return makeTranslate(elements);
384:                } else if (functionName.equals("RotateTranslate")
385:                        || functionName.equals("TranslateRotate")
386:                        || functionName.equals("Concatenate")) {
387:
388:                    return concatenate(elements);
389:                } else if (functionName.equals("BoundingSphere")) {
390:                    return makeBoundingSphere(elements);
391:                } else {
392:                    // This built-in can't be evaluated immediately or contains an
393:                    // unknown command.  Create a ConfigCommand for later evaluation.
394:                    return new ConfigCommand(elements,
395:                            configContainer.currentFileName, lineNumber);
396:                }
397:            }
398:
399:            /**
400:             * Processes the built-in command (Translate x y z).
401:             * 
402:             * @param elements ArrayList containing Doubles wrapping x, y, and z
403:             * translation components at indices 1, 2, and 3 respectively
404:             * 
405:             * @return matrix that translates by the given x, y, and z components
406:             */
407:            private Matrix4d makeTranslate(ArrayList elements) {
408:                if (elements.size() != 4) {
409:                    throw new IllegalArgumentException(
410:                            "Incorrect number of arguments to Translate");
411:                }
412:
413:                if (!(elements.get(1) instanceof  Double)
414:                        || !(elements.get(2) instanceof  Double)
415:                        || !(elements.get(3) instanceof  Double)) {
416:                    throw new IllegalArgumentException(
417:                            "All arguments to Translate must be numbers");
418:                }
419:
420:                Matrix4d m4d = new Matrix4d();
421:                m4d.set(new Vector3d(((Double) elements.get(1)).doubleValue(),
422:                        ((Double) elements.get(2)).doubleValue(),
423:                        ((Double) elements.get(3)).doubleValue()));
424:
425:                return m4d;
426:            }
427:
428:            /**
429:             * Processes the (Rotate x y z) built-in command.
430:             * 
431:             * @param elements ArrayList containing Doubles wrapping x, y, and z Euler
432:             * angles at indices 1, 2, and 3 respectively
433:             * 
434:             * @return matrix that rotates by the given Euler angles around static X,
435:             * Y, and Z basis vectors: first about X, then Y, and then Z
436:             * 
437:             * @see Transform3D#setEuler()
438:             */
439:            private Matrix4d makeRotate(ArrayList elements) {
440:                if (elements.size() != 4) {
441:                    throw new IllegalArgumentException(
442:                            "Incorrect number of arguments to Rotate");
443:                }
444:
445:                if (!(elements.get(1) instanceof  Double)
446:                        || !(elements.get(2) instanceof  Double)
447:                        || !(elements.get(3) instanceof  Double)) {
448:                    throw new IllegalArgumentException(
449:                            "All arguments to Rotate must be numbers");
450:                }
451:
452:                double x = Math.toRadians(((Double) elements.get(1))
453:                        .doubleValue());
454:                double y = Math.toRadians(((Double) elements.get(2))
455:                        .doubleValue());
456:                double z = Math.toRadians(((Double) elements.get(3))
457:                        .doubleValue());
458:
459:                Transform3D t3d = new Transform3D();
460:                t3d.setEuler(new Vector3d(x, y, z));
461:
462:                Matrix4d m4d = new Matrix4d();
463:                t3d.get(m4d);
464:
465:                return m4d;
466:            }
467:
468:            /**
469:             * Processes the (RotateTranslate m1 m2), (TranslateRotate m1 m2), and
470:             * (Concatenate m1 m2) built-in commands. Although these do exactly the
471:             * same thing, using the appropriate command is recommended in order to
472:             * explicitly describe the sequence of transforms and their intent.
473:             * 
474:             * @param elements ArrayList containing Matrix4d objects m1 and m2 at
475:             * indices 1 and 2 respectively
476:             * 
477:             * @return matrix that concatenates m1 and m2 in that order: if a point is
478:             * transformed by the resulting matrix, then in effect the points are
479:             * first transformed by m1 and then m2
480:             */
481:            private Matrix4d concatenate(ArrayList elements) {
482:                String functionName = (String) elements.get(0);
483:
484:                if (elements.size() != 3) {
485:                    throw new IllegalArgumentException(
486:                            "Incorrect number of arguments to " + functionName);
487:                }
488:
489:                if (!(elements.get(1) instanceof  Matrix4d)
490:                        || !(elements.get(2) instanceof  Matrix4d)) {
491:                    throw new IllegalArgumentException("Both arguments to "
492:                            + functionName + " must be Matrix4d");
493:                }
494:
495:                // Multiply the matrices in the order such that the result, when
496:                // transforming a 3D point, will apply the transform represented by
497:                // the 1st matrix and then apply the transform represented by the 2nd
498:                // matrix.
499:                Matrix4d m4d = new Matrix4d((Matrix4d) elements.get(2));
500:                m4d.mul((Matrix4d) elements.get(1));
501:
502:                return m4d;
503:            }
504:
505:            /**
506:             * Processes the built-in command (BoundingSphere center radius).
507:             * This is used when configuring behaviors.
508:             * 
509:             * @param elements ArrayList containing Point3d at index 1 for the sphere
510:             * center and Double at index 2 wrapping the sphere radius, or the String
511:             * "infinite" at index 2.
512:             * 
513:             * @return BoundingSphere with the given center and radius
514:             */
515:            private BoundingSphere makeBoundingSphere(ArrayList elements) {
516:                if (elements.size() != 3) {
517:                    throw new IllegalArgumentException(
518:                            "Incorrect number of arguments to BoundingSphere");
519:                }
520:
521:                if (!(elements.get(1) instanceof  Point3d)
522:                        || !(elements.get(2) instanceof  Double || elements
523:                                .get(2) instanceof  String))
524:                    throw new IllegalArgumentException(
525:                            "BoundingSphere needs a Point3d center "
526:                                    + "followed by a Double radius or the String \"infinite\"");
527:
528:                double r;
529:                if (elements.get(2) instanceof  Double)
530:                    r = ((Double) elements.get(2)).doubleValue();
531:                else
532:                    r = Double.POSITIVE_INFINITY;
533:
534:                return new BoundingSphere((Point3d) elements.get(1), r);
535:            }
536:
537:            void print() {
538:                System.out.print("(");
539:                int argc = elements.size();
540:                for (int i = 0; i < argc; i++) {
541:                    if (elements.get(i) instanceof  Matrix3d) {
542:                        String[] rows = ConfigCommand
543:                                .formatMatrixRows((Matrix3d) elements.get(i));
544:                        System.out.println("\n ((" + rows[0] + ")");
545:                        System.out.println("  (" + rows[1] + ")");
546:                        System.out.print("  (" + rows[2] + "))");
547:                        if (i != (argc - 1))
548:                            System.out.println();
549:                    } else if (elements.get(i) instanceof  Matrix4d) {
550:                        String[] rows = ConfigCommand
551:                                .formatMatrixRows((Matrix4d) elements.get(i));
552:                        System.out.println("\n ((" + rows[0] + ")");
553:                        System.out.println("  (" + rows[1] + ")");
554:                        System.out.println("  (" + rows[2] + ")");
555:                        System.out.print("  (" + rows[3] + "))");
556:                        if (i != (argc - 1))
557:                            System.out.println();
558:                    } else if (elements.get(i) instanceof  ConfigSexpression) {
559:                        if (i > 0)
560:                            System.out.print(" ");
561:                        ((ConfigSexpression) elements.get(i)).print();
562:                        if (i != (argc - 1))
563:                            System.out.println();
564:                    } else if (elements.get(i) instanceof  ConfigCommand) {
565:                        if (i > 0)
566:                            System.out.print(" ");
567:                        System.out.print(elements.get(i).toString());
568:                        if (i != (argc - 1))
569:                            System.out.println();
570:                    } else {
571:                        if (i > 0)
572:                            System.out.print(" ");
573:                        System.out.print(elements.get(i).toString());
574:                    }
575:                }
576:                System.out.print(")");
577:            }
578:        }
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