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/*

 * 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 geojava.GeoUtm;

import geojava.Ra2De;

import geojava.UtmGeo;

import org.cresques.cts.ICoordTrans;

import org.cresques.cts.IDatum;

import org.cresques.cts.IProjection;

import org.cresques.px.Extent;

import java.awt.Graphics2D;

import java.awt.geom.AffineTransform;

import java.awt.geom.Point2D;

public class UtmZone extends Projection {

    static String name = "UTM";

    static String abrev = "UTM";

    private final static UtmZone ed5028N = new UtmZone(Ellipsoid.ed50, 28, 0,

                                                       0.0);

    private final static UtmZone ed5029N = new UtmZone(Ellipsoid.ed50, 29, 0,

                                                       0.0);

    private final static UtmZone ed5030N = new UtmZone(Ellipsoid.ed50, 30, 0,

                                                       0.0);

    private final static UtmZone ed5031N = new UtmZone(Ellipsoid.ed50, 31, 0,

                                                       0.0);

    private final static UtmZone hayford28N = new UtmZone(Ellipsoid.hayford,

                                                          28, 0, 0.0);

    private final static UtmZone hayford29N = new UtmZone(Ellipsoid.hayford,

                                                          29, 0, 0.0);

    private final static UtmZone hayford30N = new UtmZone(Ellipsoid.hayford,

                                                          30, 0, 0.0);

    private final static UtmZone hayford31N = new UtmZone(Ellipsoid.hayford,

                                                          31, 0, 0.0);

    static GeoUtm geoutm = new GeoUtm();

    static UtmGeo utmgeo = new UtmGeo();

    public int Zone = 30;

    public int Hemisphere = 0;

    public double H = 0.0;

    public UtmZone(Ellipsoid eli, int zone, int hemisphere, double h) {

        super(eli);

        Zone = zone;

        Hemisphere = hemisphere;

        H = h;

        grid = new Graticule(this);

    }

    public String getAbrev() {

        return abrev + Zone;

    }

    public static UtmZone getProjection(Ellipsoid eli, int zone, int hemisphere) {

        if ((eli == Ellipsoid.hayford) && (hemisphere == 0)) {

            switch (zone) {

            case 28:

                return hayford28N;

            case 29:

                return hayford29N;

            case 30:

                return hayford30N;

            case 31:

                return hayford31N;

            }

        } else if ((eli == Ellipsoid.ed50) && (hemisphere == 0)) {

            switch (zone) {

            case 28:

                return ed5028N;

            case 29:

                return ed5029N;

            case 30:

                return ed5030N;

            case 31:

                return ed5031N;

            }

        }

        System.err.println("UtmZone.getProjection(): new " + zone);

        return new UtmZone(eli, zone, hemisphere, 0.0);

    }

    /**

     *

     */

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

        int zone;

        int hemisphere = NORTH;

        if (name.indexOf("UTM") < 0) {

            return null;

        }

        if (name.substring(0, 1).compareTo("S") == 0) {

            hemisphere = SOUTH;

        }

        zone = Integer.parseInt(name.substring(name.length() - 2));

        return getProjection((Ellipsoid) eli, zone, hemisphere);

    }

    /**

     *

     */

    public Point2D createPoint(double x, double y) {

        return new UtmPoint(this, x, y);

    }

    /**

     *

     * @param uPt

     * @return

     */

    public Point2D toGeo(Point2D uPt) {

        GeoPoint gPt = new GeoPoint();

        return toGeo((UtmPoint) uPt, gPt);

    }

    /**

     *

     * @param uPt

     * @param gPt

     * @return

     */

    public GeoPoint toGeo(UtmPoint uPt, GeoPoint gPt) {

        int[] ai = new int[3];

        double[] ad = new double[3];

        ai[1] = ((UtmZone) uPt.proj).Zone;

        ai[2] = ((UtmZone) uPt.proj).Hemisphere;

        ad[1] = uPt.X;

        ad[2] = uPt.Y;

        utmgeo.set(((Projection) uPt.proj).getElliPar(), ai, ad);

        utmgeo.go();

        gPt.Longitude = Ra2De.go(utmgeo.Ge[1]);

        gPt.Latitude = Ra2De.go(utmgeo.Ge[2]);

        gPt.proj = Geodetic.getProjection(((Projection) uPt.proj).eli);

        return gPt;

    }

    /**

     *

     * @param gPt

     * @param uPt

     * @return

     */

    public Point2D fromGeo(Point2D gPt, Point2D uPt) {

        int[] ai = { 0, 0, 2 };

        return fromGeo((GeoPoint) gPt, (UtmPoint) uPt, ai);

    }

    /**

     *

     * @param gPt

     * @param uPt

     * @param proj

     * @return

     */

    public UtmPoint fromGeo(GeoPoint gPt, UtmPoint uPt, UtmZone proj) {

        int[] ai = { 0, proj.Zone, proj.Hemisphere };

        return fromGeo(gPt, uPt, ai);

    }

    /**

     *

     * @param gPt

     * @param uPt

     * @param ai

     * @return

     */

    public UtmPoint fromGeo(GeoPoint gPt, UtmPoint uPt, int[] ai) {

        double[] ad = new double[4];

        ad[1] = gPt.Longitude.ToRadians();

        ad[2] = gPt.Latitude.ToRadians();

        geoutm.set(((Projection) gPt.proj).getElliPar(), ai, ad);

        geoutm.go();

        if (geoutm.Ier != 0) {

            return null;

        }

        uPt.setLocation(geoutm.Pr[1], geoutm.Pr[2]);

        if ((((UtmZone) uPt.proj).Zone != geoutm.Iopar[1]) ||

                (((UtmZone) uPt.proj).Hemisphere != geoutm.Iopar[2])) {

            uPt.proj = UtmZone.getProjection(((Projection) uPt.proj).eli,

                                             geoutm.Iopar[1], geoutm.Iopar[2]);

        }

        return uPt;

    }

    // Calcula el step en funci?n del zoom

    private void generateGrid(Graphics2D g, Extent extent, AffineTransform mat) {

        // calculo del step en funci?n del zoom

        Point2D pt1 = extent.getMin();

        double step = 1.0;

        double x = (int) pt1.getX();

        double dist = 0.0;

        /*        GeoPoint gp1, gp2;

                gp1 = (GeoPoint) createPoint( x, (int) pt1.getY());

                mat.transform(gp1, gp1);

                gp2 = (GeoPoint) createPoint(gp1.getX()+100, gp1.getY()-100);

                try {

                        mat.inverseTransform(gp2, gp2);

                } catch (NoninvertibleTransformException e) {

                        // TODO Auto-generated catch block

                        e.printStackTrace();

                }

                dist = (gp2.getX()-x);

                System.err.println("distX = " + dist);

                if (dist > 30.0) {                         step = 30.0;

                } else if (dist > 18.0) {         step = 18.0;

                } else if (dist > 12.0) {        step = 12.0;

                } else if (dist > 6.0) {        step = 6.0;

                } else if (dist > 3.0) {        step = 3.0;

                } else if (dist > 2.0) {        step = 2.0;

                } else if (dist > 1.0) {        step = 1.0;

                } else if (dist > .5) {                step =.5;

                } else if (dist > .25) {        step =.25;

                } else if (dist > 1.0/60*5.0) { step = 1.0/60*5.0;

                } else {                                        step = 1.0/60*2.0;

                }

                        //step = 1.0;

                */

        generateGrid(g, extent, mat, step);

    }

    private void generateGrid(Graphics2D g, Extent extent, AffineTransform mat,

                              double step) {

        grid = new Graticule(this);

        Point2D pt1 = extent.getMin();

        Point2D pt2 = extent.getMax();

        GeoPoint gp1;

        GeoPoint gp2;

        UtmPoint up1 = (UtmPoint) createPoint(0, 0);

        UtmPoint up2 = (UtmPoint) createPoint(0, 0);

        Point2D.Double mp1 = new Point2D.Double(0.0, 0.0);

        Point2D.Double mp2 = new Point2D.Double(0.0, 0.0);

        Geodetic geoProj = Geodetic.getProjection((Ellipsoid) getDatum());

        boolean esUso = false;

        System.err.println(name + ": ViewPort Extent = (" + pt1 + "," + pt2 +

                           ")");

        gp1 = (GeoPoint) toGeo(new UtmPoint(pt1.getX(), pt2.getY()));

        gp2 = (GeoPoint) toGeo(new UtmPoint(pt2));

        double xMin = (int) gp1.getX() - 1.0;

        double xMax = (int) gp2.getX() + 1.0;

        gp1 = (GeoPoint) toGeo(new UtmPoint(pt1.getX() +

                                            ((pt2.getX() - pt1.getX()) / 2.0),

                                            pt2.getY()));

        double yMax = (int) gp1.getY() + 2.0;

        gp1 = (GeoPoint) toGeo(new UtmPoint(pt1));

        double yMin = (int) gp1.getY() - 1.0;

        xMin = -30.0;

        xMax = 30.0;

        yMin = 20.0;

        yMax = 60.0;

        for (double x = xMin; x <= xMax; x += step) {

            up1 = null;

            if (Math.abs((x) % 6) < .001) {

                esUso = true;

            }

            for (double y = yMin; y <= yMax; y += step) {

                gp2 = (GeoPoint) geoProj.createPoint(x, y);

                fromGeo(gp2, up2, this);

                if ((up1 != null) && (extent.isAt(up1) || extent.isAt(up2))) {

                    mat.transform(up2, mp2);

                    if (up1 != null) {

                        if (esUso) {

                            grid.addLine(mp1, mp2, 1);

                        } else {

                            grid.addLine(mp1, mp2);

                        }

                    }

                } else {

                    mat.transform(up2, mp2);

                }

                up1 = (UtmPoint) up2.clone();

                mp1 = (Point2D.Double) mp2.clone();

            }

            esUso = false;

        }

        for (double y = yMin; y <= yMax; y += step) {

            up1 = null;

            for (double x = xMin; x <= xMax; x += step) {

                gp2 = (GeoPoint) geoProj.createPoint(x, y);

                fromGeo(gp2, up2, this);

                if ((up1 != null) && (extent.isAt(up1) || extent.isAt(up2))) {

                    mat.transform(up2, mp2);

                    if (up1 != null) {

                        grid.addLine(mp1, mp2);

                    }

                } else {

                    mat.transform(up2, mp2);

                }

                up1 = (UtmPoint) up2.clone();

                mp1 = (Point2D.Double) mp2.clone();

            }

        }

    }

    public void drawGrid(Graphics2D g, ViewPortData vp) {

        generateGrid(g, vp.getExtent(), vp.getMat());

        grid.setColor(gridColor);

        grid.draw(g, vp);

    }

    /* (non-Javadoc)

     * @see org.cresques.cts.IProjection#getScale(double, double, double, double)

     */

    public double getScale(double minX, double maxX, double width, double dpi) {

        double scale = ((maxX - minX) * // metros

                       (dpi / 2.54 * 100.0)) / // px / metro

                       width; // pixels

        return scale;

    }

        public ICoordTrans getCT(IProjection dest) {

                // TODO Auto-generated method stub

                return null;

        }

}