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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