113 lines
2.8 KiB
Java
113 lines
2.8 KiB
Java
/*
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* Copyright 2010, 2011, 2012 mapsforge.org
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*
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* This program is free software: you can redistribute it and/or modify it under the
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* terms of the GNU Lesser General Public License as published by the Free Software
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* Foundation, either version 3 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, but WITHOUT ANY
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* WARRANTY; without even the implied warranty of MERCHANTABILITY or FITNESS FOR A
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* PARTICULAR PURPOSE. See the GNU Lesser General Public License for more details.
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*
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* You should have received a copy of the GNU Lesser General Public License along with
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* this program. If not, see <http://www.gnu.org/licenses/>.
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*/
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package org.oscim.core;
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/**
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* A tile represents a rectangular part of the world map. All tiles can be
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* identified by their X and Y number together with their zoom level. The actual
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* area that a tile covers on a map depends on the underlying map projection.
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*/
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public class Tile {
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/**
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* Width and height of a map tile in pixel.
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*/
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public static int TILE_SIZE = 256;
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/**
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* The X number of this tile.
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*/
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public final int tileX;
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/**
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* The Y number of this tile.
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*/
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public final int tileY;
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/**
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* The Zoom level of this tile.
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*/
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public final byte zoomLevel;
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/**
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* the pixel X coordinate of the upper left corner of this tile.
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*/
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public final long pixelX;
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/**
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* the pixel Y coordinate of the upper left corner of this tile.
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*/
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public final long pixelY;
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/**
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* @param tileX
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* the X number of the tile.
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* @param tileY
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* the Y number of the tile.
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* @param zoomLevel
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* the zoom level of the tile.
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*/
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public Tile(int tileX, int tileY, byte zoomLevel) {
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this.tileX = tileX;
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this.tileY = tileY;
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this.pixelX = this.tileX * TILE_SIZE;
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this.pixelY = this.tileY * TILE_SIZE;
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this.zoomLevel = zoomLevel;
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}
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@Override
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public String toString() {
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StringBuilder stringBuilder = new StringBuilder();
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stringBuilder.append("[X:");
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stringBuilder.append(this.tileX);
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stringBuilder.append(", Y:");
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stringBuilder.append(this.tileY);
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stringBuilder.append(", Z:");
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stringBuilder.append(this.zoomLevel);
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stringBuilder.append("]");
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return stringBuilder.toString();
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}
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@Override
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public boolean equals(Object obj) {
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if (this == obj)
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return true;
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if (!(obj instanceof Tile))
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return false;
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Tile o = (Tile) obj;
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if (o.tileX == this.tileX && o.tileY == this.tileY
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&& o.zoomLevel == this.zoomLevel)
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return true;
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return false;
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}
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private int mHash = 0;
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@Override
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public int hashCode() {
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if (mHash == 0) {
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int result = 7;
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result = 31 * result + this.tileX;
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result = 31 * result + this.tileY;
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result = 31 * result + this.zoomLevel;
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mHash = result;
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}
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return mHash;
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}
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}
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