/*
* 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
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* EXEMPLARY, OR CONSEQUENTIAL DAMAGES (INCLUDING, BUT NOT LIMITED TO,
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package com.jme3.scene.debug;
import java.nio.FloatBuffer;
import java.util.Map;
import com.jme3.animation.Bone;
import com.jme3.animation.Skeleton;
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;
/**
* A class that displays a dotted line between a bone tail and its childrens' heads.
*
* @author Marcin Roguski (Kaelthas)
*/
public class SkeletonInterBoneWire extends Mesh {
private static final int POINT_AMOUNT = 10;
/** The amount of connections between bones. */
private int connectionsAmount;
/** The skeleton that will be showed. */
private Skeleton skeleton;
/** The map between the bone index and its length. */
private Map<Integer, Float> boneLengths;
/**
* Creates buffers for points. Each line has POINT_AMOUNT of points.
* @param skeleton
* the skeleton that will be showed
* @param boneLengths
* the lengths of the bones
*/
public SkeletonInterBoneWire(Skeleton skeleton, Map<Integer, Float> boneLengths) {
this.skeleton = skeleton;
for (Bone bone : skeleton.getRoots()) {
this.countConnections(bone);
}
this.setMode(Mode.Points);
this.setPointSize(1);
this.boneLengths = boneLengths;
VertexBuffer pb = new VertexBuffer(Type.Position);
FloatBuffer fpb = BufferUtils.createFloatBuffer(POINT_AMOUNT * connectionsAmount * 3);
pb.setupData(Usage.Stream, 3, Format.Float, fpb);
this.setBuffer(pb);
this.updateCounts();
}
/**
* The method updates the geometry according to the poitions 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 parentTail = bone.getModelSpacePosition().add(bone.getModelSpaceRotation().mult(Vector3f.UNIT_Y.mult(boneLengths.get(i))));
for (Bone child : bone.getChildren()) {
Vector3f childHead = child.getModelSpacePosition();
Vector3f v = childHead.subtract(parentTail);
float pointDelta = v.length() / POINT_AMOUNT;
v.normalizeLocal().multLocal(pointDelta);
Vector3f pointPosition = parentTail.clone();
for (int j = 0; j < POINT_AMOUNT; ++j) {
posBuf.put(pointPosition.getX()).put(pointPosition.getY()).put(pointPosition.getZ());
pointPosition.addLocal(v);
}
}
}
posBuf.flip();
vb.updateData(posBuf);
this.updateBound();
}
/**
* Th method couns the connections between bones.
* @param bone
* the bone where counting starts
*/
private void countConnections(Bone bone) {
for (Bone child : bone.getChildren()) {
++connectionsAmount;
this.countConnections(child);
}
}
}