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