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/* gvSIG. Sistema de Informaci?n Geogr?fica de la Generalitat Valenciana
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*
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* Copyright (C) 2007 IVER T.I. and Generalitat Valenciana.
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*
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* This program is free software; you can redistribute it and/or
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* modify it under the terms of the GNU General Public License
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* as published by the Free Software Foundation; either version 2
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* of the License, or (at your option) any later version.
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*
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* This program is distributed in the hope that it will be useful,
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* but WITHOUT ANY WARRANTY; without even the implied warranty of
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* MERCHANTABILITY or FITNESS FOR A PARTICULAR PURPOSE. See the
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* GNU General Public License for more details.
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*
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* You should have received a copy of the GNU General Public License
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* along with this program; if not, write to the Free Software
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* Foundation, Inc., 59 Temple Place - Suite 330, Boston, MA 02111-1307,USA.
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*/
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package org.gvsig.raster.util;
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/**
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* Utilidades para calculos matem?ticos
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*
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* @version 18/04/2007
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* @author Nacho Brodin (nachobrodin@gmail.com)
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*
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*/
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public class MathUtils {
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public static double INCHESMTR = 39.73007874D;
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public static double INCHESCM = 0.3973007874D;
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public static double INCHESMM = 0.03973007874D;
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public static double MTRSINCH = 0.0254D;
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public static double MMSINCH = 25.4D;
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public static double CMSINCH = 2.54D;
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/**
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* Recorta el n?mero de decimales a n del n?mero pasado por par?metro
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* @return N?mero recortado
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*/
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public static double tailDecimals(double num, int n){
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int m = (int)Math.pow(10, n);
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num *= m;
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int aux = ((int)num);
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num = (double)((double)aux / (double)m);
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return num;
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}
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/**
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* Convierte pixels en milimetros dependiendo del los puntos por pulgada
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* @param pixels N?mero de pixels
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* @param ppp Puntos por pulgada
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* @return N?mero de milimetros
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*/
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public static double convertPixelsToMms(int pixels, int ppp){
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return convertPixelsToInches(pixels, ppp) * MMSINCH;
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}
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/**
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* Convierte pixels en centimetros dependiendo del los metros por pixel
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* @param pixels N?mero de pixels
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* @param mtsPixel Metros por pixel
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* @return N?mero de centimetros
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*/
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public static double convertPixelsToCms(int pixels, int ppp){
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return convertPixelsToInches(pixels, ppp) * CMSINCH;
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}
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/**
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* Convierte pixels en metros dependiendo del los metros por pixel
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* @param pixels N?mero de pixels
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* @param mtsPixel Metros por pixel
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* @return N?mero de metros
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*/
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public static double convertPixelsToMts(int pixels, int ppp){
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return convertPixelsToInches(pixels, ppp) * MTRSINCH;
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}
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/**
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* Convierte pixels en pulgadas dependiendo del los metros por pixel
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* @param pixels N?mero de pixels
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* @param mtsPixel Metros por pixel
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* @return N?mero de pulgadas
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*/
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public static double convertPixelsToInches(int pixels, int ppp){
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return (double)((double)pixels / (double)ppp);
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}
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/**
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* Convierte metros en pixels dependiendo de los puntos por pulgada
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* @param mts N?mero de metros
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* @param ppp Puntos por pulgada
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* @return N?mero de pixeles
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*/
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public static int convertMtsToPixels(double mts, int ppp){
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return (int)(mts * MathUtils.INCHESMTR * ppp);
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}
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/**
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* Convierte pulgadas en pixels dependiendo de los puntos por pulgada
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* @param mts N?mero de pulgadas
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* @param ppp Puntos por pulgada
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* @return N?mero de pixeles
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*/
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public static int convertInchesToPixels(double inches, int ppp){
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return (int)(inches * ppp);
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}
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/**
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* Convierte centimetros en pixels dependiendo de los puntos por pulgada
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* @param mts N?mero de centmetros
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* @param ppp Puntos por pulgada
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* @return N?mero de pixeles
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*/
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public static int convertCmsToPixels(double cms, int ppp){
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return (int)(cms * MathUtils.INCHESCM * ppp);
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}
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/**
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* Convierte milimetros en pixels dependiendo de los puntos por pulgada
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* @param mts N?mero de milimetros
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* @param ppp Puntos por pulgada
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* @return N?mero de pixeles
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*/
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public static int convertMmsToPixels(double mms, int ppp){
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return (int)(mms * MathUtils.INCHESMM * ppp);
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}
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}
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