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/*
* Copyright (c) 2007 Sun Microsystems, Inc. All rights reserved.
*
* Redistribution and use in source and binary forms, with or without
* modification, are permitted provided that the following conditions
* are met:
*
* - Redistribution of source code must retain the above copyright
* notice, this list of conditions and the following disclaimer.
*
* - Redistribution in binary form must reproduce the above copyright
* notice, this list of conditions and the following disclaimer in
* the documentation and/or other materials provided with the
* distribution.
*
* Neither the name of Sun Microsystems, Inc. or the names of
* contributors may be used to endorse or promote products derived
* from this software without specific prior written permission.
*
* This software is provided "AS IS," without a warranty of any
* kind. ALL EXPRESS OR IMPLIED CONDITIONS, REPRESENTATIONS AND
* WARRANTIES, INCLUDING ANY IMPLIED WARRANTY OF MERCHANTABILITY,
* FITNESS FOR A PARTICULAR PURPOSE OR NON-INFRINGEMENT, ARE HEREBY
* EXCLUDED. SUN MICROSYSTEMS, INC. ("SUN") AND ITS LICENSORS SHALL
* NOT BE LIABLE FOR ANY DAMAGES SUFFERED BY LICENSEE AS A RESULT OF
* USING, MODIFYING OR DISTRIBUTING THIS SOFTWARE OR ITS
* DERIVATIVES. IN NO EVENT WILL SUN OR ITS LICENSORS BE LIABLE FOR
* ANY LOST REVENUE, PROFIT OR DATA, OR FOR DIRECT, INDIRECT, SPECIAL,
* CONSEQUENTIAL, INCIDENTAL OR PUNITIVE DAMAGES, HOWEVER CAUSED AND
* REGARDLESS OF THE THEORY OF LIABILITY, ARISING OUT OF THE USE OF OR
* INABILITY TO USE THIS SOFTWARE, EVEN IF SUN HAS BEEN ADVISED OF THE
* POSSIBILITY OF SUCH DAMAGES.
*
* You acknowledge that this software is not designed, licensed or
* intended for use in the design, construction, operation or
* maintenance of any nuclear facility.
*
*/
package com.sun.j3d.loaders.lw3d;
import java.io.BufferedReader;
import java.io.FileNotFoundException;
import java.io.FileReader;
import java.io.IOException;
import java.io.StreamTokenizer;
import java.util.Enumeration;
import java.util.Vector;
import javax.media.j3d.Alpha;
import javax.media.j3d.BoundingSphere;
import javax.media.j3d.Switch;
import javax.media.j3d.TransformGroup;
import javax.vecmath.Point3d;
import com.sun.j3d.loaders.ParsingErrorException;
/**
* This class was created to read a special file format devised for
* JavaOne '98 that allowed Tloop functionality inside of Lightwave. It
* would be best to find a more standard solution, including using some
* plug-in for lw3d that I've heard of that allows artists to automatically
* save out the geometry for a file at every frame.
*/
class SequenceReader {
Vector sequenceLines;
float totalTime;
int totalFrames;
TransformGroup objectTransform;
Vector behaviorVector;
/**
* Constructor: parses a sequence file and creates a new SequenceLine
* object to read in every line of the file
*/
SequenceReader(String filename, float time, int frames)
throws ParsingErrorException {
totalTime = time;
totalFrames = frames;
sequenceLines = new Vector();
try {
// System.out.println("reading sequence from " + filename);
StreamTokenizer st = new StreamTokenizer(new BufferedReader(
new FileReader(filename)));
st.wordChars('_', '_');
st.wordChars('/', '/');
int type = st.nextToken();
while (st.ttype != StreamTokenizer.TT_EOF) {
sequenceLines.addElement(new SequenceLine(st,
totalTime,
totalFrames));
st.nextToken();
}
}
catch (IOException e) {
throw new ParsingErrorException(e.getMessage());
}
}
/**
* Creates Java3D objects from the data defined in the sequence
* file. Calls each sequenceLine object to create its own
* j3d objects, then puts all of those objects in a single Switch
* node. Finally, it creates a SwitchPathInterpolator object which
* handles switching between each object/s defined by each line
*/
void createJava3dObjects(int debugVals, int loadBehaviors)
throws FileNotFoundException {
objectTransform = new TransformGroup();
behaviorVector = new Vector();
Enumeration e = sequenceLines.elements();
Switch switchNode = new Switch();
switchNode.setCapability(Switch.ALLOW_SWITCH_READ);
switchNode.setCapability(Switch.ALLOW_SWITCH_WRITE);
objectTransform.addChild(switchNode);
while (e.hasMoreElements()) {
SequenceLine line = (SequenceLine)e.nextElement();
line.createJava3dObjects(debugVals, loadBehaviors);
if (line.getGeometry() != null)
switchNode.addChild(line.getGeometry());
//objectTransform.addChild(line.getGeometry());
if (line.getBehavior() != null) {
behaviorVector.addElement(line.getBehavior());
}
}
float knots[] = new float[sequenceLines.size() + 1];
for (int i = 0; i < knots.length-1; ++i) {
SequenceLine sl = (SequenceLine)sequenceLines.elementAt(i);
knots[i] = (float)sl.startFrame/(float)totalFrames;
}
knots[knots.length-1] = 1.0f;
Alpha theAlpha = new Alpha(-1, Alpha.INCREASING_ENABLE,
0, 0, (long)(1000f * totalTime), 0,
0, 0, 0, 0);
SwitchPathInterpolator switchPath =
new SwitchPathInterpolator(theAlpha,
knots,
switchNode);
BoundingSphere bounds =
new BoundingSphere(new Point3d(0.0,0.0,0.0), 1000000.0);
switchPath.setSchedulingBounds(bounds);
switchNode.addChild(switchPath);
behaviorVector.addElement(switchPath);
}
TransformGroup getObjectNode() {
return objectTransform;
}
Vector getObjectBehaviors() {
return behaviorVector;
}
void printLines() {
Enumeration e = sequenceLines.elements();
while (e.hasMoreElements()) {
SequenceLine line = (SequenceLine)e.nextElement();
}
}
}