/*
* __ .__ .__ ._____.
* _/ |_ _______ __|__| ____ | | |__\_ |__ ______
* \ __\/ _ \ \/ / |/ ___\| | | || __ \ / ___/
* | | ( <_> > <| \ \___| |_| || \_\ \\___ \
* |__| \____/__/\_ \__|\___ >____/__||___ /____ >
* \/ \/ \/ \/
*
* Copyright (c) 2006-2011 Karsten Schmidt
*
* 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.
*
* http://creativecommons.org/licenses/LGPL/2.1/
*
* 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., 51 Franklin St, Fifth Floor, Boston, MA 02110-1301, USA
*/
package toxi.geom.mesh;
import java.util.Collection;
import java.util.HashMap;
import java.util.List;
import toxi.geom.Vec3D;
/**
* Applies a laplacian smooth function to all vertices in the mesh
*
*/
public class LaplacianSmooth implements WEMeshFilterStrategy {
public void filter(VertexSelector selector, int numIterations) {
final Collection<Vertex> selection = selector.getSelection();
if (!(selector.getMesh() instanceof WETriangleMesh)) {
throw new IllegalArgumentException(
"This filter requires a WETriangleMesh");
}
final WETriangleMesh mesh = (WETriangleMesh) selector.getMesh();
final HashMap<Vertex, Vec3D> filtered = new HashMap<Vertex, Vec3D>(
selection.size());
for (int i = 0; i < numIterations; i++) {
filtered.clear();
for (Vertex v : selection) {
final Vec3D laplacian = new Vec3D();
final List<WEVertex> neighbours = ((WEVertex) v).getNeighbors();
for (WEVertex n : neighbours) {
laplacian.addSelf(n);
}
laplacian.scaleSelf(1f / neighbours.size());
filtered.put(v, laplacian);
}
for (Vertex v : filtered.keySet()) {
mesh.vertices.get(v).set(filtered.get(v));
}
mesh.rebuildIndex();
}
mesh.computeFaceNormals();
mesh.computeVertexNormals();
}
public void filter(WETriangleMesh mesh, int numIterations) {
filter(new DefaultSelector(mesh).selectVertices(), numIterations);
}
}