/**
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* Make a donation http://sourceforge.net/donate/index.php?group_id=98797
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* Microcrowd
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*
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* This library is free software; you can redistribute it and/or
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* modify it under the terms of the GNU Lesser General Public
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* License as published by the Free Software Foundation; either
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* version 2.1 of the License, or (at your option) any later version.
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*
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* This library is distributed in the hope that it will be useful,
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* but WITHOUT ANY WARRANTY; without even the implied warranty of
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* MERCHANTABILITY or FITNESS FOR A PARTICULAR PURPOSE. See the GNU
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* Lesser General Public License for more details.
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*
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* You should have received a copy of the GNU Lesser General Public
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* License along with this library; if not, write to the Free Software
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* Foundation, Inc., 59 Temple Place, Suite 330, Boston, MA 02111-1307 USA
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*
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* Contact Josh DeFord jdeford@microcrowd.com
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*/
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package com.microcrowd.loader.java3d.max3ds.chunks;
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import javax.media.j3d.Transform3D;
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import javax.vecmath.Point3f;
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import com.microcrowd.loader.java3d.max3ds.ChunkChopper;
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/**
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* Extracts the local coordinate that will act
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* as a shape's axis that will be used by the mesh
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* info chunk.
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*/
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public class AxisChunk extends Chunk
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{
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private float value;
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/**
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* Loads the local coordinate system for the current mesh.
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*
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* @param chopper the ChunkChopper containing the state of the parser.
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*
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* The location of the local coordinate system is defined relative to
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* positions and rotations at frame 0. But the orientation is absolutely
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* defined.
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*
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* With either 3x3 or 4x4 rotation, translation, there
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* is a simple relationship between each matrix and the resulting coordinate
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* system. The first three columns of the matrix define the direction vector of the
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* X, Y and Z axii respectively.
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* If a 4x4 matrix is defined as:
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* <code>
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* | A B C D |
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* M = | E F G H |
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* | I J K L |
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* | M N O P |
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* </code>
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* Then the direction vector for each axis is as follows:
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*
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* <code>
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* X-axis = [ A E I ]
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* Y-axis = [ B F J ]
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* Z-axis = [ C G K ]
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* </code>
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*
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* @return the actual number of bytes read.
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*/
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public void loadData(ChunkChopper chopper)
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{
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Point3f xAxis = new Point3f();
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xAxis = chopper.getPoint();
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Point3f zAxis = chopper.getPoint();
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Point3f yAxis = chopper.getPoint();
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Point3f origin = chopper.getPoint();
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Transform3D transform = new Transform3D(new double[]{
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xAxis.x, xAxis.y, xAxis.z, origin.x,
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yAxis.x, yAxis.y, yAxis.z, origin.y,
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-zAxis.x, -zAxis.y, -zAxis.z, origin.z,
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0,0,0,1});
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String meshName = chopper.getObjectName();
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chopper.getKeyFramer().setCoordinateSystem(meshName, transform);
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}
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}
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