Android Open Source - Look Mapa

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License

The source code is released under:

====================== LOOK! LICENSING TERMS ====================== look! is licensed under the BSD 3-Clause (also known as "BSD New" or "BSD Simplified"), as follows: Copyright (c) 2010-2012, Look...

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Java Source Code

/**
*-----------------------------------------------------------------------------
* Copyright (c) 2012, Look! Development Team
* All rights reserved./*w ww.ja v  a2s . c  o m*/
*
* Distributed under the terms of the BSD Simplified License.
*
* The full license is in the LICENSE file, distributed with this software.
*-----------------------------------------------------------------------------
*/
package es.ucm.look.locationProvider.map;


/**
 * Maps INS coordinates to MAP coordinates.
 * 
 * @author Jorge Creixell Rojo
 * Based on Indoor Navigation System for Handheld Devices
 * by Manh Hung V. Le, Dimitris Saragas, Nathan Webb
 * 
 */
public class Mapa {
  /**
   * Scale factor
   */
  public static float SCALE = 0.033264f; // 1 pixel = 0.1 meter
  
  /**
   * Orientation factor.
   */
  public static float NORTH = -0.277777777777f; //-0.221992086112412f;

  /**
   * Initialize all the variables
   */
  public static void initialize() {

  }

  /**
   * Convert to map coordination system
   * 
   * Return the distance move in pixel in the frame system of the current
   * building with specified offset angle
   * 
   * @param north
   *            the distance toward north in meter
   * @param east
   *            the distance toward east in meter
   * @return the distance in x and y axis in pixel
   */
  public static float[] toMapCS(float[] csEarth) {

    float[] csBuilding = new float[2]; // building coordinate system
    float[] csMap = new float[2]; // map coordinate system
    float a = -Mapa.NORTH;

    csBuilding[0] = (float) (Math.cos(a) * csEarth[0] + Math.sin(a)
        * csEarth[1]);
    csBuilding[1] = (float) (-Math.sin(a) * csEarth[1] + Math.cos(a)
        * csEarth[1]);

    csMap[0] = -csBuilding[0];
    csMap[1] = csBuilding[1];
    return csMap;
  }

  /**
   * Convert the vector from meter to pixels
   * 
   * @param meter
   *            The vector in meter
   * @return The vector in pixel
   */
  public static int[] toMapScale(float[] meter) {
    return toMapScale(meter[0], meter[1]);
  }

  /**
   * Convert the vector from meter to pixels
   * 
   * @param x
   *            the x coordination point right in meter
   * @param y
   *            the y coordination point bottom in meter
   * @return the vector in pixel
   */
  public static int[] toMapScale(float x, float y) {
    int[] pixel = new int[2];
    pixel[0] = (int) (x / Mapa.SCALE);
    pixel[1] = (int) (y / Mapa.SCALE);
    return pixel;
  }
  
}

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