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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.px.dxf;

import org.cresques.geo.Point3D;

import java.lang.Math;

/**

 * La clase DxfCalXtru se emplea para aplicar los par?metros de extrusi?n de las

 * entidades de un DXF. Esta transformaci?n provoca alteraciones en las coordenadas de

 * estos elementos.

 * @author jmorell

 */

public class DxfCalXtru {

    /**

     * Aplica a un punto en 3D sus correspondientes par?metros de extrusi?n.

     * @param coord_in, punto antes de aplicar la extrusi?n.

     * @param xtru, par?metros de extrusi?n en X, en Y y en Z.

     * @return Point3D, punto 3D afectado de extrusi?n.

     */

    public static Point3D CalculateXtru(Point3D coord_in, Point3D xtru) {

        Point3D coord_out = new Point3D();

        double dxt0 = 0D;

        double dyt0 = 0D;

        double dzt0 = 0D;

        double dvx1;

        double dvx2;

        double dvx3;

        double dvy1;

        double dvy2;

        double dvy3;

        double dmod;

        double dxt;

        double dyt;

        double dzt;

        double aux = 1D / 64D; //LWS

        double aux1 = Math.abs(xtru.getX());

        double aux2 = Math.abs(xtru.getY());

        dxt0 = coord_in.getX();

        dyt0 = coord_in.getY();

        dzt0 = coord_in.getZ();

        double xtruX;

        double xtruY;

        double xtruZ;

        xtruX = xtru.getX();

        xtruY = xtru.getY();

        xtruZ = xtru.getZ();

        if ((aux1 < aux) && (aux2 < aux)) {

            dmod = Math.sqrt((xtruZ * xtruZ) + (xtruX * xtruX));

            dvx1 = xtruZ / dmod;

            dvx2 = 0;

            dvx3 = -xtruX / dmod;

        } else {

            dmod = Math.sqrt((xtruY * xtruY) + (xtruX * xtruX));

            dvx1 = -xtruY / dmod;

            dvx2 = xtruX / dmod;

            dvx3 = 0;

        }

        dvy1 = (xtruY * dvx3) - (xtruZ * dvx2);

        dvy2 = (xtruZ * dvx1) - (xtruX * dvx3);

        dvy3 = (xtruX * dvx2) - (xtruY * dvx1);

        dmod = Math.sqrt((dvy1 * dvy1) + (dvy2 * dvy2) + (dvy3 * dvy3));

        dvy1 = dvy1 / dmod;

        dvy2 = dvy2 / dmod;

        dvy3 = dvy3 / dmod;

        dxt = (dvx1 * dxt0) + (dvy1 * dyt0) + (xtruX * dzt0);

        dyt = (dvx2 * dxt0) + (dvy2 * dyt0) + (xtruY * dzt0);

        dzt = (dvx3 * dxt0) + (dvy3 * dyt0) + (xtruZ * dzt0);

        coord_out.setLocation(dxt, dyt, dzt);

        //coord_out.z = dzt;

        dxt0 = 0;

        dyt0 = 0;

        dzt0 = 0;

        return coord_out;

    }

    /**

     * Devuelve el coseno de un ?ngulo introducido en grados sexagesimales.

     * @param alfa, ?ngulo.

     * @return double, valor del coseno.

     */

    public static double cosDeg(double alfa) {

        final double toRad = Math.PI / (double) 180.0;

        return Math.cos(alfa * toRad);

    }

    /**

     * Devuelve el seno de un ?ngulo introducido en grados sexagesimales.

     * @param alfa, ?ngulo.

     * @return double, valor del seno.

     */

    public static double sinDeg(double alfa) {

        final double toRad = Math.PI / (double) 180.0;

        return Math.sin(alfa * toRad);

    }

}