Source Code Cross Referenced for PositionInterpolator.java in  » 6.0-JDK-Modules » java-3d » org » jdesktop » j3d » loaders » vrml97 » impl » 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 » org.jdesktop.j3d.loaders.vrml97.impl 
Source Cross Referenced  Class Diagram Java Document (Java Doc) 


001:        /*
002:         * $RCSfile: PositionInterpolator.java,v $
003:         *
004:         *      @(#)PositionInterpolator.java 1.18 98/11/05 20:34:54
005:         *
006:         * Copyright (c) 1996-1998 Sun Microsystems, Inc. All Rights Reserved.
007:         *
008:         * Sun grants you ("Licensee") a non-exclusive, royalty free, license to use,
009:         * modify and redistribute this software in source and binary code form,
010:         * provided that i) this copyright notice and license appear on all copies of
011:         * the software; and ii) Licensee does not utilize the software in a manner
012:         * which is disparaging to Sun.
013:         *
014:         * This software is provided "AS IS," without a warranty of any kind. ALL
015:         * EXPRESS OR IMPLIED CONDITIONS, REPRESENTATIONS AND WARRANTIES, INCLUDING ANY
016:         * IMPLIED WARRANTY OF MERCHANTABILITY, FITNESS FOR A PARTICULAR PURPOSE OR
017:         * NON-INFRINGEMENT, ARE HEREBY EXCLUDED. SUN AND ITS LICENSORS SHALL NOT BE
018:         * LIABLE FOR ANY DAMAGES SUFFERED BY LICENSEE AS A RESULT OF USING, MODIFYING
019:         * OR DISTRIBUTING THE SOFTWARE OR ITS DERIVATIVES. IN NO EVENT WILL SUN OR ITS
020:         * LICENSORS BE LIABLE FOR ANY LOST REVENUE, PROFIT OR DATA, OR FOR DIRECT,
021:         * INDIRECT, SPECIAL, CONSEQUENTIAL, INCIDENTAL OR PUNITIVE DAMAGES, HOWEVER
022:         * CAUSED AND REGARDLESS OF THE THEORY OF LIABILITY, ARISING OUT OF THE USE OF
023:         * OR INABILITY TO USE SOFTWARE, EVEN IF SUN HAS BEEN ADVISED OF THE
024:         * POSSIBILITY OF SUCH DAMAGES.
025:         *
026:         * This software is not designed or intended for use in on-line control of
027:         * aircraft, air traffic, aircraft navigation or aircraft communications; or in
028:         * the design, construction, operation or maintenance of any nuclear
029:         * facility. Licensee represents and warrants that it will not use or
030:         * redistribute the Software for such purposes.
031:         *
032:         * $Revision: 1.2 $
033:         * $Date: 2005/02/03 23:06:59 $
034:         * $State: Exp $
035:         */
036:        /*
037:         * @Author: Rick Goldberg
038:         * @Author: Doug Gehringer
039:         */
040:        package org.jdesktop.j3d.loaders.vrml97.impl;
041:
042:        /**  Description of the Class */
043:        public class PositionInterpolator extends Interpolator {
044:
045:            // eventIn
046:            SFFloat fraction;
047:
048:            // exposedField
049:            // MFFloat key; // from Interpolator
050:            MFVec3f keyValue;
051:
052:            // eventOut
053:
054:            // spec goes its value_changed, but we need to have a value first
055:            SFVec3f value;
056:
057:            float[] v1 = new float[3];
058:            float[] v2 = new float[3];
059:
060:            /**
061:             *Constructor for the PositionInterpolator object
062:             *
063:             *@param  loader Description of the Parameter
064:             */
065:            public PositionInterpolator(Loader loader) {
066:                super (loader);
067:                fraction = new SFFloat(0.0f);
068:                key = new MFFloat();
069:                keyValue = new MFVec3f();
070:                value = new SFVec3f(0.0f, 0.0f, 0.0f);
071:                initFields();
072:            }
073:
074:            /**
075:             *Constructor for the PositionInterpolator object
076:             *
077:             *@param  loader Description of the Parameter
078:             *@param  key Description of the Parameter
079:             *@param  keyValue Description of the Parameter
080:             */
081:            PositionInterpolator(Loader loader, MFFloat key, MFVec3f keyValue) {
082:                super (loader);
083:                // initialize the interpolator to the right
084:                // value. otherwise do it manually;
085:                this .fraction = new SFFloat(0.0f);
086:                this .key = key;
087:                this .keyValue = keyValue;
088:                this .value = new SFVec3f(0.0f, 0.0f, 1.0f);// may need to cycle
089:                // through one interp
090:                initFields();
091:            }
092:
093:            /**
094:             *  Description of the Method
095:             *
096:             *@param  eventInName Description of the Parameter
097:             *@param  time Description of the Parameter
098:             */
099:            public void notifyMethod(String eventInName, double time) {
100:                if (eventInName.equals("fraction")) {
101:                    if (key.mfloat.length > 0) {
102:                        setIndexFract(fraction.value);
103:                        // TODO: (Rick) reevaluate performance trade off between
104:                        // MFVec3f{->}float[] vs MFVec3f{->}SFVec3f[], since
105:                        // runtime efficiency is being spent to gain parse/init
106:                        // efficiency which is usually only going to happen once.
107:                        // DDG: As coded, the overhead is minimal.
108:                        // Also, having the array be of SFVec3f objects adds to the
109:                        // memory overhead as well as the accessing overhead.
110:                        // Bottom line:
111:                        // SFVec3f[] is much easier to read and maintain, float[] is
112:                        // leaner and closer to j3d.
113:                        //
114:                        int v0Base = iL * 3;
115:                        int v1Base = (iL + 1) * 3;
116:                        v1[0] = keyValue.value[v0Base];
117:                        v1[1] = keyValue.value[v0Base + 1];
118:                        v1[2] = keyValue.value[v0Base + 2];
119:                        v2[0] = keyValue.value[v1Base];
120:                        v2[1] = keyValue.value[v1Base + 1];
121:                        v2[2] = keyValue.value[v1Base + 2];
122:                        value.value[0] = (v1[0] * af) + (v2[0] * f);
123:                        value.value[1] = (v1[1] * af) + (v2[1] * f);
124:                        value.value[2] = (v1[2] * af) + (v2[2] * f);
125:                    }
126:                    value.route();
127:                }
128:
129:            }
130:
131:            /**
132:             *  Description of the Method
133:             *
134:             *@return  Description of the Return Value
135:             */
136:            public Object clone() {
137:                return new PositionInterpolator(loader, (MFFloat) key.clone(),
138:                        (MFVec3f) keyValue.clone());
139:            }
140:
141:            /**
142:             *  Gets the type attribute of the PositionInterpolator object
143:             *
144:             *@return  The type value
145:             */
146:            public String getType() {
147:                return "PositionInterpolator";
148:            }
149:
150:            /**  Description of the Method */
151:            void initFields() {
152:                fraction.init(this , FieldSpec, Field.EVENT_IN, "fraction");
153:                key.init(this , FieldSpec, Field.EXPOSED_FIELD, "key");
154:                keyValue.init(this , FieldSpec, Field.EXPOSED_FIELD, "keyValue");
155:                value.init(this , FieldSpec, Field.EVENT_OUT, "value");
156:            }
157:
158:        }
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