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/**
* Make a donation http://sourceforge.net/donate/index.php?group_id=98797
* Microcrowd.com
*
* This library is free software; you can redistribute it and/or
* modify it under the terms of the GNU Lesser General Public
* License as published by the Free Software Foundation; either
* version 2.1 of the License, or (at your option) any later version.
*
* This library is distributed in the hope that it will be useful,
* but WITHOUT ANY WARRANTY; without even the implied warranty of
* MERCHANTABILITY or FITNESS FOR A PARTICULAR PURPOSE. See the GNU
* Lesser General Public License for more details.
*
* You should have received a copy of the GNU Lesser General Public
* License along with this library; if not, write to the Free Software
* Foundation, Inc., 59 Temple Place, Suite 330, Boston, MA 02111-1307 USA
*
* Contact Josh DeFord jdeford@microcrowd.com
*/
package com.microcrowd.loader.java3d.max3ds.chunks;
import javax.media.j3d.Behavior;
import com.microcrowd.loader.java3d.max3ds.ChunkChopper;
/**
* A KeyFramerInfoChunk stores information about things
* that happen to meshes: Position information, rotation
* information, scale information, pivot information
* and frame information.
* Together with the frames chunk thes are used
* display animation behaviors.
*
* @author Josh DeFord
*/
public class KeyFramerInfoChunk extends Chunk
{
/**
* Retrieves the named object for the current key framer
* inserts the rotation, position and pivot transformations for frame 0
* and assigns the coordinate system to it.
*
* The inverse of the local coordinate system converts from 3ds
* semi-absolute coordinates (what is in the file) to local coordinates.
*
* Then these local coordinates are converted with matrix
* that will instantiate them to absolute coordinates:
* Xabs = sx a1 (Xl-Px) + sy a2 (Yl-Py) + sz a3 (Zl-Pz) + Tx
* Yabs = sx b1 (Xl-Px) + sy b2 (Yl-Py) + sz b3 (Zl-Pz) + Ty
* Zabs = sx c1 (Xl-Px) + sy c2 (Yl-Py) + sz c3 (Zl-Pz) + Tz
* Where:
* (Xabs,Yabs,Zabs) = absolute coordinate
* (Px,Py,Pz) = mesh pivot (constant)
* (X1,Y1,Z1) = local coordinates
*
* @param chopper the ChunkChopper containing the current state of the parser.
*/
public void initialize(ChunkChopper chopper)
{
String meshName = (String)chopper.getObjectName();
Behavior frameBehavior = chopper.getKeyFramer().createBehavior(meshName,
chopper.getNamedTransformGroup(meshName),
chopper.getNamedObject(meshName));
if(frameBehavior != null)
chopper.addBehaviorNode(frameBehavior);
}
}
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