org.jgrasstools.gears.io.dxfdwg.libs.dxf.DxfVERTEX Maven / Gradle / Ivy

/*
 * Library name : dxf
 * (C) 2006 Micha�l Michaud
 * 
 * This program 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.
 * 
 * This program 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 this program; if not, write to the Free Software
 * Foundation, Inc., 59 Temple Place - Suite 330, Boston, MA  02111-1307, USA.
 * 
 * For more information, contact:
 *
 * [email protected]
 *
 */

package org.jgrasstools.gears.io.dxfdwg.libs.dxf;

import java.io.IOException;
import java.io.RandomAccessFile;

import com.vividsolutions.jts.geom.Coordinate;
import com.vividsolutions.jts.geom.CoordinateList;


/**
 * A VERTEX and a static readEntity method to read a VERTEX in a DXF file.
 * @author Micha�l Michaud
 * @version 0.5.0
 */
// History
// 2006-11-12 : Bug fixed x==Double.NaN --> Double.isNaN(x)
public class DxfVERTEX extends DxfENTITY {

    public DxfVERTEX() {super("DEFAULT");}

    public static DxfGroup readEntity(RandomAccessFile raf, CoordinateList coordList)
                                                            throws IOException {
        Coordinate coord;
        double x=Double.NaN, y=Double.NaN, z=Double.NaN;
        DxfGroup group;
        try {
            while (null != (group = DxfGroup.readGroup(raf)) && group.getCode()!=0) {
                if (group.getCode()==10) x = group.getDoubleValue();
                else if (group.getCode()==20) y = group.getDoubleValue();
                else if (group.getCode()==30) z = group.getDoubleValue();
                else {}
            }
            if (!Double.isNaN(x) && !Double.isNaN(y)) {
                coordList.add(new Coordinate(x,y,z));
            }
        } catch (IOException ioe) {throw ioe;}
        return group;
    }

}