96 lines
3.0 KiB
Java
96 lines
3.0 KiB
Java
//This file is part of SECONDO.
|
|
|
|
//Copyright (C) 2004, University in Hagen, Department of Computer Science,
|
|
//Database Systems for New Applications.
|
|
|
|
//SECONDO is free software; you can redistribute it and/or modify
|
|
//it under the terms of the GNU General Public License as published by
|
|
//the Free Software Foundation; either version 2 of the License, or
|
|
//(at your option) any later version.
|
|
|
|
//SECONDO 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 General Public License for more details.
|
|
|
|
//You should have received a copy of the GNU General Public License
|
|
//along with SECONDO; if not, write to the Free Software
|
|
//Foundation, Inc., 59 Temple Place, Suite 330, Boston, MA 02111-1307 USA
|
|
|
|
package viewer.hoese.algebras.fixedmregion;
|
|
|
|
import java.awt.Polygon;
|
|
import java.awt.Shape;
|
|
import java.awt.geom.AffineTransform;
|
|
import java.awt.geom.Area;
|
|
import sj.lang.ListExpr;
|
|
import viewer.hoese.QueryResult;
|
|
import viewer.hoese.algebras.DisplayGraph;
|
|
|
|
/**
|
|
*
|
|
* Base class for displaying a CRegion object.
|
|
*
|
|
* @author Florian Heinz <fh@sysv.de>
|
|
*/
|
|
public class DisplayCRegion extends DisplayGraph {
|
|
/** The cregion to display */
|
|
private CRegion creg;
|
|
|
|
@Override
|
|
public int numberOfShapes() {
|
|
return creg.getFaces().size();
|
|
}
|
|
|
|
@Override
|
|
public Shape getRenderObject(int num, AffineTransform at) {
|
|
if (creg == null)
|
|
return null;
|
|
Area a = getAreaFromFace(creg.getFaces().get(num));
|
|
return a;
|
|
}
|
|
|
|
/**
|
|
* Returns a displayable Area object from a CFace.
|
|
* The resulting area is only an approximation of the real shape.
|
|
*
|
|
* @param cface The CFace to create an area for
|
|
* @return The area to display
|
|
*/
|
|
private Area getAreaFromFace(CFace cface) {
|
|
Polygon p = new Polygon();
|
|
/** The number of points per curved segment. Higher value means better
|
|
approximation. */
|
|
final int nrpoints = 10;
|
|
|
|
// Create the main polygon cycle
|
|
for (RCurve r : cface.getRCurves()) {
|
|
for (Point pt : r.getPoints(nrpoints))
|
|
p.addPoint((int)pt.x, (int)pt.y);
|
|
}
|
|
// Make an area from it
|
|
Area a = new Area(p);
|
|
// And subtract all holes
|
|
for (CFace h : cface.getHoles()) {
|
|
p = new Polygon();
|
|
for (RCurve r : h.getRCurves()) {
|
|
for (Point pt : r.getPoints(nrpoints))
|
|
p.addPoint((int)pt.x, (int)pt.y);
|
|
}
|
|
a.subtract(new Area(p));
|
|
}
|
|
|
|
return a;
|
|
}
|
|
|
|
@Override
|
|
public void init (String name, int nameWidth, int indent, ListExpr type,
|
|
ListExpr value, QueryResult qr) {
|
|
super.init(name, nameWidth, indent, type, value, qr);
|
|
NL nl = new NL(value);
|
|
creg = CRegion.deserialize(nl);
|
|
|
|
qr.addEntry(this);
|
|
}
|
|
}
|