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/*
* Copyright (c) 2009-2021 jMonkeyEngine
* All rights reserved.
*
* Redistribution and use in source and binary forms, with or without
* modification, are permitted provided that the following conditions are
* met:
*
* * Redistributions of source code must retain the above copyright
* notice, this list of conditions and the following disclaimer.
*
* * Redistributions 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 'jMonkeyEngine' nor the names of its contributors
* may be used to endorse or promote products derived from this software
* without specific prior written permission.
*
* THIS SOFTWARE IS PROVIDED BY THE COPYRIGHT HOLDERS AND CONTRIBUTORS
* "AS IS" AND ANY EXPRESS OR IMPLIED WARRANTIES, INCLUDING, BUT NOT LIMITED
* TO, THE IMPLIED WARRANTIES OF MERCHANTABILITY AND FITNESS FOR A PARTICULAR
* PURPOSE ARE DISCLAIMED. IN NO EVENT SHALL THE COPYRIGHT OWNER OR
* CONTRIBUTORS BE LIABLE FOR ANY DIRECT, INDIRECT, INCIDENTAL, SPECIAL,
* EXEMPLARY, OR CONSEQUENTIAL DAMAGES (INCLUDING, BUT NOT LIMITED TO,
* PROCUREMENT OF SUBSTITUTE GOODS OR SERVICES; LOSS OF USE, DATA, OR
* PROFITS; OR BUSINESS INTERRUPTION) HOWEVER CAUSED AND ON ANY THEORY OF
* LIABILITY, WHETHER IN CONTRACT, STRICT LIABILITY, OR TORT (INCLUDING
* NEGLIGENCE OR OTHERWISE) ARISING IN ANY WAY OUT OF THE USE OF THIS
* SOFTWARE, EVEN IF ADVISED OF THE POSSIBILITY OF SUCH DAMAGE.
*/
package com.jme3.scene.plugins.ogre;
import com.jme3.anim.*;
import com.jme3.anim.util.AnimMigrationUtils;
import com.jme3.asset.AssetInfo;
import com.jme3.asset.AssetLoader;
import com.jme3.math.Quaternion;
import com.jme3.math.Vector3f;
import com.jme3.util.xml.SAXUtil;
import org.xml.sax.*;
import org.xml.sax.helpers.DefaultHandler;
import javax.xml.parsers.ParserConfigurationException;
import javax.xml.parsers.SAXParserFactory;
import java.io.*;
import java.util.*;
import java.util.logging.Logger;
public class SkeletonLoader extends DefaultHandler implements AssetLoader {
private static final Logger logger = Logger.getLogger(SceneLoader.class.getName());
//private AssetManager assetManager;
private Stack elementStack = new Stack<>();
private HashMap indexToJoint = new HashMap<>();
private HashMap nameToJoint = new HashMap<>();
private TransformTrack track;
private ArrayList tracks = new ArrayList<>();
private AnimClip animClip;
private ArrayList animClips;
private Joint joint;
private Armature armature;
private ArrayList times = new ArrayList<>();
private ArrayList translations = new ArrayList<>();
private ArrayList rotations = new ArrayList<>();
private ArrayList scales = new ArrayList<>();
private float time = -1;
private Vector3f position;
private Quaternion rotation;
private Vector3f scale;
private float angle;
private Vector3f axis;
private List unusedJoints = new ArrayList<>();
@Override
public void startElement(String uri, String localName, String qName, Attributes attribs) throws SAXException {
if (qName.equals("position") || qName.equals("translate")) {
position = SAXUtil.parseVector3(attribs);
} else if (qName.equals("rotation") || qName.equals("rotate")) {
angle = SAXUtil.parseFloat(attribs.getValue("angle"));
} else if (qName.equals("axis")) {
assert elementStack.peek().equals("rotation")
|| elementStack.peek().equals("rotate");
axis = SAXUtil.parseVector3(attribs);
} else if (qName.equals("scale")) {
scale = SAXUtil.parseVector3(attribs);
} else if (qName.equals("keyframe")) {
assert elementStack.peek().equals("keyframes");
time = SAXUtil.parseFloat(attribs.getValue("time"));
} else if (qName.equals("keyframes")) {
assert elementStack.peek().equals("track");
} else if (qName.equals("track")) {
assert elementStack.peek().equals("tracks");
String jointName = SAXUtil.parseString(attribs.getValue("bone"));
joint = nameToJoint.get(jointName);
track = new TransformTrack(joint, null, null, null, null);
} else if (qName.equals("boneparent")) {
assert elementStack.peek().equals("bonehierarchy");
String jointName = attribs.getValue("bone");
String parentName = attribs.getValue("parent");
Joint joint = nameToJoint.get(jointName);
Joint parent = nameToJoint.get(parentName);
parent.addChild(joint);
} else if (qName.equals("bone")) {
assert elementStack.peek().equals("bones");
// insert bone into indexed map
joint = new Joint(attribs.getValue("name"));
int id = SAXUtil.parseInt(attribs.getValue("id"));
indexToJoint.put(id, joint);
nameToJoint.put(joint.getName(), joint);
} else if (qName.equals("tracks")) {
assert elementStack.peek().equals("animation");
tracks.clear();
unusedJoints.clear();
unusedJoints.addAll(nameToJoint.values());
} else if (qName.equals("animation")) {
assert elementStack.peek().equals("animations");
String name = SAXUtil.parseString(attribs.getValue("name"));
//float length = SAXUtil.parseFloat(attribs.getValue("length"));
animClip = new AnimClip(name);
} else if (qName.equals("bonehierarchy")) {
assert elementStack.peek().equals("skeleton");
} else if (qName.equals("animations")) {
assert elementStack.peek().equals("skeleton");
animClips = new ArrayList<>();
} else if (qName.equals("bones")) {
assert elementStack.peek().equals("skeleton");
} else if (qName.equals("skeleton")) {
assert elementStack.size() == 0;
}
elementStack.add(qName);
}
@Override
public void endElement(String uri, String name, String qName) {
if (qName.equals("translate") || qName.equals("position") || qName.equals("scale")) {
} else if (qName.equals("axis")) {
} else if (qName.equals("rotate") || qName.equals("rotation")) {
rotation = new Quaternion();
axis.normalizeLocal();
rotation.fromAngleNormalAxis(angle, axis);
angle = 0;
axis = null;
} else if (qName.equals("bone")) {
joint.getLocalTransform().setTranslation(position);
joint.getLocalTransform().setRotation(rotation);
if (scale != null) {
joint.getLocalTransform().setScale(scale);
}
joint = null;
position = null;
rotation = null;
scale = null;
} else if (qName.equals("bonehierarchy")) {
Joint[] joints = new Joint[indexToJoint.size()];
// find joints without a parent and attach them to the armature
// also assign the joints to the jointList
for (Map.Entry entry : indexToJoint.entrySet()) {
Joint joint = entry.getValue();
joints[entry.getKey()] = joint;
}
indexToJoint.clear();
armature = new Armature(joints);
armature.saveBindPose();
armature.saveInitialPose();
} else if (qName.equals("animation")) {
animClips.add(animClip);
animClip = null;
} else if (qName.equals("track")) {
if (track != null) { // if track has keyframes
tracks.add(track);
unusedJoints.remove(joint);
track = null;
}
} else if (qName.equals("tracks")) {
//nameToJoint contains the joints with no track
for (Joint j : unusedJoints) {
AnimMigrationUtils.padJointTracks(tracks, j);
}
TransformTrack[] trackList = tracks.toArray(new TransformTrack[tracks.size()]);
animClip.setTracks(trackList);
tracks.clear();
} else if (qName.equals("keyframe")) {
assert time >= 0;
assert position != null;
assert rotation != null;
times.add(time);
translations.add(position.addLocal(joint.getLocalTranslation()));
rotations.add(joint.getLocalRotation().mult(rotation, rotation));
if (scale != null) {
scales.add(scale.multLocal(joint.getLocalScale()));
}else{
scales.add(new Vector3f(1,1,1));
}
time = -1;
position = null;
rotation = null;
scale = null;
} else if (qName.equals("keyframes")) {
if (times.size() > 0) {
float[] timesArray = new float[times.size()];
for (int i = 0; i < timesArray.length; i++) {
timesArray[i] = times.get(i);
}
Vector3f[] transArray = translations.toArray(new Vector3f[translations.size()]);
Quaternion[] rotArray = rotations.toArray(new Quaternion[rotations.size()]);
Vector3f[] scalesArray = scales.toArray(new Vector3f[scales.size()]);
track.setKeyframes(timesArray, transArray, rotArray, scalesArray);
} else {
track = null;
}
times.clear();
translations.clear();
rotations.clear();
scales.clear();
} else if (qName.equals("skeleton")) {
nameToJoint.clear();
}
assert elementStack.peek().equals(qName);
elementStack.pop();
}
/**
* Reset the SkeletonLoader in case an error occurred while parsing XML.
* This allows future use of the loader even after an error.
*/
private void fullReset() {
elementStack.clear();
indexToJoint.clear();
nameToJoint.clear();
track = null;
tracks.clear();
animClip = null;
if (animClips != null) {
animClips.clear();
}
joint = null;
armature = null;
times.clear();
rotations.clear();
translations.clear();
time = -1;
position = null;
rotation = null;
scale = null;
angle = 0;
axis = null;
}
public Object load(InputStream in) throws IOException {
try {
// Added by larynx 25.06.2011
// Android needs the namespace aware flag set to true
// Kirill 30.06.2011
// Now, hack is applied for both desktop and android to avoid
// checking with JmeSystem.
SAXParserFactory factory = SAXParserFactory.newInstance();
factory.setNamespaceAware(true);
XMLReader xr = factory.newSAXParser().getXMLReader();
xr.setContentHandler(this);
xr.setErrorHandler(this);
InputStreamReader r = new InputStreamReader(in);
xr.parse(new InputSource(r));
if (animClips == null) {
animClips = new ArrayList();
}
AnimData data = new AnimData(armature, animClips);
armature = null;
animClips = null;
return data;
} catch (SAXException | ParserConfigurationException ex) {
IOException ioEx = new IOException("Error while parsing Ogre3D dotScene");
ioEx.initCause(ex);
fullReset();
throw ioEx;
}
}
@Override
public Object load(AssetInfo info) throws IOException {
//AssetManager assetManager = info.getManager();
InputStream in = null;
try {
in = info.openStream();
return load(in);
} finally {
if (in != null){
in.close();
}
}
}
}
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