Source Code Cross Referenced for WakeupOnSensorEntry.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: WakeupOnSensorEntry.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: 1.5 $
028:         * $Date: 2008/02/28 20:17:33 $
029:         * $State: Exp $
030:         */
031:
032:        package javax.media.j3d;
033:
034:        /**
035:         * Class specifying a wakeup on first sensor intersection with the
036:         * specified boundary.
037:         */
038:        public final class WakeupOnSensorEntry extends WakeupCriterion {
039:
040:            // different types of WakeupIndexedList that use in BehaviorStructure
041:            static final int COND_IN_BS_LIST = 0;
042:            static final int SENSORENTRY_IN_BS_LIST = 1;
043:
044:            // total number of different IndexedUnorderedSet types
045:            static final int TOTAL_INDEXED_UNORDER_SET_TYPES = 2;
046:
047:            Bounds region;
048:
049:            // Transformed region used by BehaviorStructure
050:            Bounds transformedRegion;
051:
052:            Sensor armingSensor;
053:
054:            /**
055:             * Constructs a new WakeupOnEntry criterion.
056:             * @param region the region that will trigger a wakeup if a Sensor
057:             *        intersects.
058:             */
059:            public WakeupOnSensorEntry(Bounds region) {
060:                this .region = (Bounds) region.clone();
061:                WakeupIndexedList.init(this , TOTAL_INDEXED_UNORDER_SET_TYPES);
062:            }
063:
064:            /**
065:             * Returns this object's bounds specification
066:             * @return the bounds used in constructing this WakeupCriterion.
067:             */
068:            public Bounds getBounds() {
069:                return (Bounds) region.clone();
070:            }
071:
072:            /**
073:             * Update the cached Transfrom Region, call from BehaviorStructure
074:             */
075:            void updateTransformRegion() {
076:                if (transformedRegion != null) {
077:                    transformedRegion.set(region);
078:                } else {
079:                    // region is read only once initialize (since there is no
080:                    // set method for region). So no need to use cloneWithLock()
081:                    transformedRegion = (Bounds) region.clone();
082:                }
083:                transformedRegion
084:                        .transform(behav.getCurrentLocalToVworld(null));
085:            }
086:
087:            /**
088:             * This is a callback from BehaviorStructure. It is 
089:             * used to add wakeupCondition to behavior structure.
090:             */
091:            void addBehaviorCondition(BehaviorStructure bs) {
092:                bs.addSensorEntryCondition(this );
093:                if ((behav != null) && behav.enable) {
094:                    bs.activeWakeupOnSensorCount++;
095:                }
096:            }
097:
098:            /**
099:             * This is a callback from BehaviorStructure. It is 
100:             * used to remove wakeupCondition from behavior structure.
101:             */
102:            void removeBehaviorCondition(BehaviorStructure bs) {
103:                bs.removeSensorEntryCondition(this );
104:                if ((behav != null) && behav.enable) {
105:                    bs.activeWakeupOnSensorCount--;
106:                }
107:            }
108:
109:            /**
110:             * Set the sensor that trigger this behavior
111:             */
112:            void setTarget(Sensor sensor) {
113:                this .armingSensor = sensor;
114:            }
115:
116:            /**
117:             * Retrieves the Sensor object that caused the wakeup.
118:             *
119:             * @return the triggering Sensor object
120:             *
121:             * @exception IllegalStateException if not called from within 
122:             * a behavior's processStimulus method which was awoken by a sensor
123:             * entry.
124:             *
125:             * @since Java 3D 1.2
126:             */
127:            public Sensor getTriggeringSensor() {
128:                if (behav == null) {
129:                    throw new IllegalStateException(J3dI18N
130:                            .getString("WakeupOnSensorEntry0"));
131:                }
132:
133:                synchronized (behav) {
134:                    if (!behav.inCallback) {
135:                        throw new IllegalStateException(J3dI18N
136:                                .getString("WakeupOnSensorEntry0"));
137:                    }
138:                }
139:                return armingSensor;
140:            }
141:
142:            /**
143:             * Perform task in addBehaviorCondition() that has to be
144:             * set every time the condition met.
145:             */
146:            void resetBehaviorCondition(BehaviorStructure bs) {
147:            }
148:        }
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