/**
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* Make a donation http://sourceforge.net/donate/index.php?group_id=98797
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* Microcrowd.com
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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.Behavior;
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import com.microcrowd.loader.java3d.max3ds.ChunkChopper;
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/**
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* A KeyFramerInfoChunk stores information about things
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* that happen to meshes: Position information, rotation
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* information, scale information, pivot information
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* and frame information.
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* Together with the frames chunk thes are used
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* display animation behaviors.
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*
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* @author Josh DeFord
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*/
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public class KeyFramerInfoChunk extends Chunk
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{
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/**
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* Retrieves the named object for the current key framer
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* inserts the rotation, position and pivot transformations for frame 0
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* and assigns the coordinate system to it.
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*
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* The inverse of the local coordinate system converts from 3ds
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* semi-absolute coordinates (what is in the file) to local coordinates.
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*
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* Then these local coordinates are converted with matrix
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* that will instantiate them to absolute coordinates:
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* Xabs = sx a1 (Xl-Px) + sy a2 (Yl-Py) + sz a3 (Zl-Pz) + Tx
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* Yabs = sx b1 (Xl-Px) + sy b2 (Yl-Py) + sz b3 (Zl-Pz) + Ty
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* Zabs = sx c1 (Xl-Px) + sy c2 (Yl-Py) + sz c3 (Zl-Pz) + Tz
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* Where:
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* (Xabs,Yabs,Zabs) = absolute coordinate
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* (Px,Py,Pz) = mesh pivot (constant)
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* (X1,Y1,Z1) = local coordinates
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*
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* @param chopper the ChunkChopper containing the current state of the parser.
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*/
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public void initialize(ChunkChopper chopper)
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{
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String meshName = (String)chopper.getObjectName();
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Behavior frameBehavior = chopper.getKeyFramer().createBehavior(meshName,
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chopper.getNamedTransformGroup(meshName),
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chopper.getNamedObject(meshName));
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if(frameBehavior != null)
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chopper.addBehaviorNode(frameBehavior);
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}
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}
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