Application: gvSIG desktop

/*

 * Cresques Mapping Suite. Graphic Library for constructing mapping applications.

 *

 * Copyright (C) 2004-5.

 *

 * 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:

 *

 * cresques@gmail.com

 */

package org.cresques.geo;

import org.cresques.cts.IDatum;

import org.cresques.cts.IProjection;

import java.awt.Color;

import java.awt.Graphics2D;

import java.awt.geom.Point2D;

abstract public class Projection implements IProjection {

    public static int NORTH = 0;

    public static int SOUTH = 1;

    static String name = "Sin Proyeccion";

    static String abrev = "None";

    private static final Color basicGridColor = new Color(64, 64, 64, 128);

    Color gridColor = basicGridColor;

    Ellipsoid eli = Ellipsoid.hayford;

    Graticule grid;

    public Projection() {

        eli = Ellipsoid.hayford;

    }

    public Projection(Ellipsoid e) {

        eli = e;

    }

    public String getName() {

        return name;

    }

    abstract public String getAbrev();

    public IDatum getDatum() {

        return eli;

    }

    public double[] getElliPar() {

        return eli.getParam();

    }

    abstract public Point2D createPoint(double x, double y);

    public Point2D createPoint(Point2D pt) {

        return createPoint(pt.getX(), pt.getY());

    }

    public static IProjection getProjectionByName(IDatum eli, String name) {

        if (name.indexOf("UTM") >= 0) {

            return UtmZone.getProjectionByName(eli, name);

        }

        if (name.indexOf("GEO") >= 0) {

            return Geodetic.getProjectionByName(eli, name);

        }

        if (name.indexOf("MERC") >= 0) {

            return Mercator.getProjectionByName(eli, name);

        }

        return null;

    }

    public ReProjection getReproyectionTo(Projection proj) {

        ReProjection rp = new ReProjection(this, proj);

        return rp;

    }

    abstract public Point2D toGeo(Point2D pt);

    abstract public Point2D fromGeo(Point2D gPt, Point2D mPt);

    public void setGridColor(Color c) {

        gridColor = c;

    }

    public Color getGridColor() {

        return gridColor;

    }

    public static String coordToString(double coord, String fmt, boolean isLat) {

        String txt = fmt;

        int donde;

        donde = txt.indexOf("%G");

        if (donde >= 0) {

            int deg = (int) coord;

            if ((fmt.indexOf("%N") >= 0) && (deg < 0)) {

                deg = -deg;

            }

            txt = txt.substring(0, donde) + Integer.toString(deg) +

                  txt.substring(donde + 2);

        }

        donde = txt.indexOf("%M");

        if (donde >= 0) {

            int min = (int) ((coord - (int) coord) * 60.0) % 60;

            if ((fmt.indexOf("%N") >= 0) && (min < 0)) {

                min = -min;

            }

            txt = txt.substring(0, donde) + Integer.toString(min) +

                  txt.substring(donde + 2);

            ;

        }

        donde = txt.indexOf("%N");

        if (donde >= 0) {

            String t = "";

            if (isLat) {

                if (coord > 0) {

                    t = "N";

                } else if (coord < 0) {

                    t = "S";

                }

            } else {

                if (coord > 0) {

                    t = "E";

                } else if (coord < 0) {

                    t = "W";

                }

            }

            txt = txt.substring(0, donde) + t + txt.substring(donde + 2);

            ;

        }

        return txt;

    }

    abstract public void drawGrid(Graphics2D g, ViewPortData vp);

    public boolean isProjected() {

            return false;

    }

}