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jMonkeyEngine is a 3-D game engine for adventurous Java developers
/*
* Copyright (c) 2009-2012 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
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* SOFTWARE, EVEN IF ADVISED OF THE POSSIBILITY OF SUCH DAMAGE.
*/
package com.jme3.scene.debug;
import java.nio.FloatBuffer;
import java.nio.ShortBuffer;
import java.util.Map;
import com.jme3.animation.Bone;
import com.jme3.animation.Skeleton;
import com.jme3.export.InputCapsule;
import com.jme3.export.JmeExporter;
import com.jme3.export.JmeImporter;
import com.jme3.export.OutputCapsule;
import com.jme3.math.Vector3f;
import com.jme3.scene.Mesh;
import com.jme3.scene.VertexBuffer;
import com.jme3.scene.VertexBuffer.Format;
import com.jme3.scene.VertexBuffer.Type;
import com.jme3.scene.VertexBuffer.Usage;
import com.jme3.util.BufferUtils;
import java.io.IOException;
import java.util.HashMap;
/**
* The class that displays either wires between the bones' heads if no length data is supplied and
* full bones' shapes otherwise.
*/
public class SkeletonWire extends Mesh {
/** The number of bones' connections. Used in non-length mode. */
private int numConnections;
/** The skeleton to be displayed. */
private Skeleton skeleton;
/** The map between the bone index and its length. */
private Map boneLengths;
/**
* Creates a wire with no length data. The wires will be a connection between the bones' heads only.
* @param skeleton
* the skeleton that will be shown
*/
public SkeletonWire(Skeleton skeleton) {
this(skeleton, null);
}
/**
* Creates a wire with bone lengths data. If the data is supplied then the wires will show each full bone (from head to tail).
* @param skeleton
* the skeleton that will be shown
* @param boneLengths
* a map between the bone's index and the bone's length
*/
public SkeletonWire(Skeleton skeleton, Map boneLengths) {
this.skeleton = skeleton;
for (Bone bone : skeleton.getRoots()) {
this.countConnections(bone);
}
this.setMode(Mode.Lines);
int lineVerticesCount = skeleton.getBoneCount();
if (boneLengths != null) {
this.boneLengths = boneLengths;
lineVerticesCount *= 2;
}
VertexBuffer pb = new VertexBuffer(Type.Position);
FloatBuffer fpb = BufferUtils.createFloatBuffer(lineVerticesCount * 3);
pb.setupData(Usage.Stream, 3, Format.Float, fpb);
this.setBuffer(pb);
VertexBuffer ib = new VertexBuffer(Type.Index);
ShortBuffer sib = BufferUtils.createShortBuffer(boneLengths != null ? lineVerticesCount : numConnections * 2);
ib.setupData(Usage.Static, 2, Format.UnsignedShort, sib);
this.setBuffer(ib);
if (boneLengths != null) {
for (int i = 0; i < lineVerticesCount; ++i) {
sib.put((short) i);
}
} else {
for (Bone bone : skeleton.getRoots()) {
this.writeConnections(sib, bone);
}
}
sib.flip();
this.updateCounts();
}
/**
* For serialization only. Do not use.
*/
protected SkeletonWire() {
}
/**
* This method updates the geometry according to the positions of the bones.
*/
public void updateGeometry() {
VertexBuffer vb = this.getBuffer(Type.Position);
FloatBuffer posBuf = this.getFloatBuffer(Type.Position);
posBuf.clear();
for (int i = 0; i < skeleton.getBoneCount(); ++i) {
Bone bone = skeleton.getBone(i);
Vector3f head = bone.getModelSpacePosition();
posBuf.put(head.getX()).put(head.getY()).put(head.getZ());
if (boneLengths != null) {
Vector3f tail = head.add(bone.getModelSpaceRotation().mult(Vector3f.UNIT_Y.mult(boneLengths.get(i))));
posBuf.put(tail.getX()).put(tail.getY()).put(tail.getZ());
}
}
posBuf.flip();
vb.updateData(posBuf);
this.updateBound();
}
/**
* De-serializes from the specified importer, for example when loading from
* a J3O file.
*
* @param importer the importer to use (not null)
* @throws IOException from the importer
*/
@Override
public void read(JmeImporter importer) throws IOException {
super.read(importer);
InputCapsule capsule = importer.getCapsule(this);
numConnections = capsule.readInt("numConnections", 1);
skeleton = (Skeleton) capsule.readSavable("skeleton", null);
int[] blKeys = capsule.readIntArray("blKeys", null);
float[] blValues = capsule.readFloatArray("blValues", null);
if (blKeys == null) {
boneLengths = null;
} else {
assert blValues.length == blKeys.length;
int numLengths = blKeys.length;
boneLengths = new HashMap<>(numLengths);
for (int i = 0; i < numLengths; ++i) {
boneLengths.put(blKeys[i], blValues[i]);
}
}
}
/**
* Serializes to the specified exporter, for example when saving to a J3O
* file. The current instance is unaffected.
*
* @param exporter the exporter to use (not null)
* @throws IOException from the exporter
*/
@Override
public void write(JmeExporter exporter) throws IOException {
super.write(exporter);
OutputCapsule capsule = exporter.getCapsule(this);
capsule.write(numConnections, "numConnections", 1);
capsule.write(skeleton, "skeleton", null);
if (boneLengths != null) {
int numLengths = boneLengths.size();
int[] blKeys = new int[numLengths];
float[] blValues = new float[numLengths];
int i = 0;
for (Map.Entry entry : boneLengths.entrySet()) {
blKeys[i] = entry.getKey();
blValues[i] = entry.getValue();
++i;
}
capsule.write(blKeys, "blKeys", null);
capsule.write(blValues, "blValues", null);
}
}
/**
* This method counts the connections between bones.
* @param bone
* the bone where counting starts
*/
private void countConnections(Bone bone) {
for (Bone child : bone.getChildren()) {
numConnections++;
this.countConnections(child);
}
}
/**
* The method writes the indexes for the connection vertices. Used in non-length mode.
* @param indexBuf
* the index buffer
* @param bone
* the bone
*/
private void writeConnections(ShortBuffer indexBuf, Bone bone) {
for (Bone child : bone.getChildren()) {
// write myself
indexBuf.put((short) skeleton.getBoneIndex(bone));
// write the child
indexBuf.put((short) skeleton.getBoneIndex(child));
this.writeConnections(indexBuf, child);
}
}
}
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