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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.vecmath.Point3f;
import com.microcrowd.loader.java3d.max3ds.ChunkChopper;
import com.microcrowd.loader.java3d.max3ds.ChunkMap;
/**
* This chunk is used to generate normals for a mesh according
* to the data in the smoothing groups chunk.
* Vertices that share coordinates will all use the same, averaged
* normal if they also belong to the same smoothing groups.
* @author jdeford
*/
public class SmoothingChunk extends Chunk
{
/**
* Loads the vertices smoothing groups for
* a mesh and stores it in chopper
*
* @param chopper the ChunkChopper containing the state of the parser.
*/
public void loadData(ChunkChopper chopper)
{
Point3f[] vertices = (Point3f[])chopper.popData(ChunkMap.FACES_DESCRIPTION);
int[] smoothGroups = new int[vertices.length];
int numFaces = vertices.length/3;
for(int i=0; i < numFaces; i++)
{
int groupMask = chopper.getInt();
smoothGroups[i*3]=groupMask;
smoothGroups[(i*3)+1]=groupMask;
smoothGroups[(i*3)+2]=groupMask;
java.util.ArrayList list = new java.util.ArrayList();
for(int j=0; j < 32; j++)
{
if(((0x1l << j) & groupMask) > 0)
{
list.add(new Integer(j));
}
}
}
chopper.pushData(chopper.getID(), smoothGroups);
}
}
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