/*
* Copyright 2003-2006, 2009, 2017, 2020 United States Government, as represented
* by the Administrator of the National Aeronautics and Space Administration.
* All rights reserved.
*
* The NASAWorldWind/WebWorldWind platform is licensed under the Apache License,
* Version 2.0 (the "License"); you may not use this file except in compliance
* with the License. You may obtain a copy of the License
* at http://www.apache.org/licenses/LICENSE-2.0
*
* Unless required by applicable law or agreed to in writing, software distributed
* under the License is distributed on an "AS IS" BASIS, WITHOUT WARRANTIES OR
* CONDITIONS OF ANY KIND, either express or implied. See the License for the
* specific language governing permissions and limitations under the License.
*
* NASAWorldWind/WebWorldWind also contains the following 3rd party Open Source
* software:
*
* ES6-Promise – under MIT License
* libtess.js – SGI Free Software License B
* Proj4 – under MIT License
* JSZip – under MIT License
*
* A complete listing of 3rd Party software notices and licenses included in
* WebWorldWind can be found in the WebWorldWind 3rd-party notices and licenses
* PDF found in code directory.
*/
/**
* @exports TileMatrix
*/
define([
'../error/ArgumentError',
'../util/Logger',
'../geom/Sector'
],
function (ArgumentError,
Logger,
Sector) {
"use strict";
/**
* TileMatrix is a collection of tiles for a fixed resolution (degrees per pixel). It contains the dimensions of
* the tile in pixels and the dimension of the matrix in tiles.
* @param sector the geographic coverage of this TileMatrix
* @param matrixWidth the number of tiles in the x direction
* @param matrixHeight the number of tiles in the y direction
* @param tileWidth the number of pixels or points in the x direction
* @param tileHeight the number of pixels or points in the y direction
* @constructor
*/
var TileMatrix = function (sector, matrixWidth, matrixHeight, tileWidth, tileHeight) {
if (!sector) {
throw new ArgumentError(
Logger.logMessage(Logger.LEVEL_SEVERE, "TileMatrix", "constructor",
"missingSector"));
}
if (matrixWidth < 1) {
throw new ArgumentError(
Logger.logMessage(Logger.LEVEL_SEVERE, "TileMatrix", "constructor",
"invalidWidth"));
}
if (matrixHeight < 1) {
throw new ArgumentError(
Logger.logMessage(Logger.LEVEL_SEVERE, "TileMatrix", "constructor",
"invalidHeight"));
}
if (tileWidth < 1) {
throw new ArgumentError(
Logger.logMessage(Logger.LEVEL_SEVERE, "TileMatrix", "constructor",
"invalidWidth"));
}
if (tileHeight < 1) {
throw new ArgumentError(
Logger.logMessage(Logger.LEVEL_SEVERE, "TileMatrix", "constructor",
"invalidHeight"));
}
/**
* The geographic coverage area of this TileMatrix.
*/
this.sector = sector;
/**
* The number of pixels or points of tiles in the horizontal or x direction.
*/
this.tileWidth = tileWidth;
/**
* The number of pixels or points of tiles in the vertical or y direction.
*/
this.tileHeight = tileHeight;
/**
* The number of tiles in the horizontal or x direction.
*/
this.matrixWidth = matrixWidth;
/**
* The number of tiles in the vertical or y direction.
*/
this.matrixHeight = matrixHeight;
/**
* The resolution in degrees per pixel of this TileMatrix.
* @type {number}
*/
this.degreesPerPixel = this.sector.deltaLatitude() / (this.matrixHeight * this.tileHeight);
};
/**
* Returns the geographic representation of a tile at the provided row and column.
* @param row the row of the TileMatrix
* @param column the column of the TileMatrix
* @returns {Sector} a Sector representing the geographic coverage of the row and column in this TileMatrix
*/
TileMatrix.prototype.tileSector = function (row, column) {
if (row < 0 || row >= this.matrixHeight) {
throw new ArgumentError(
Logger.logMessage(Logger.LEVEL_SEVERE, "TileMatrix", "tileSector",
"invalidRod"));
}
if (column < 0 || column >= this.matrixWidth) {
throw new ArgumentError(
Logger.logMessage(Logger.LEVEL_SEVERE, "TileMatrix", "tileSector",
"invalidColumn"));
}
var deltaLat = this.sector.deltaLatitude() / this.matrixHeight;
var deltaLon = this.sector.deltaLongitude() / this.matrixWidth;
var minLat = this.sector.maxLatitude - deltaLat * (row + 1);
var minLon = this.sector.minLongitude + deltaLon * column;
return new Sector(minLat, minLat + deltaLat, minLon, minLon + deltaLon);
};
return TileMatrix;
});