/
TilingScheme.js
132 lines (120 loc) · 5.16 KB
/
TilingScheme.js
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/*global define*/
define([
'./defineProperties',
'./DeveloperError'
], function(
defineProperties,
DeveloperError) {
"use strict";
/**
* A tiling scheme for geometry or imagery on the surface of an ellipsoid. At level-of-detail zero,
* the coarsest, least-detailed level, the number of tiles is configurable.
* At level of detail one, each of the level zero tiles has four children, two in each direction.
* At level of detail two, each of the level one tiles has four children, two in each direction.
* This continues for as many levels as are present in the geometry or imagery source.
*
* @alias TilingScheme
* @constructor
*
* @see WebMercatorTilingScheme
* @see GeographicTilingScheme
*/
var TilingScheme = function TilingScheme(options) {
throw new DeveloperError('This type should not be instantiated directly. Instead, use WebMercatorTilingScheme or GeographicTilingScheme.');
};
defineProperties(TilingScheme.prototype, {
/**
* Gets the ellipsoid that is tiled by the tiling scheme.
* @memberof TilingScheme.prototype
* @type {Ellipsoid}
*/
ellipsoid: {
get : DeveloperError.throwInstantiationError
},
/**
* Gets the rectangle, in radians, covered by this tiling scheme.
* @memberof TilingScheme.prototype
* @type {Rectangle}
*/
rectangle : {
get : DeveloperError.throwInstantiationError
},
/**
* Gets the map projection used by the tiling scheme.
* @memberof TilingScheme.prototype
* @type {Projection}
*/
projection : {
get : DeveloperError.throwInstantiationError
}
});
/**
* Gets the total number of tiles in the X direction at a specified level-of-detail.
* @function
*
* @param {Number} level The level-of-detail.
* @returns {Number} The number of tiles in the X direction at the given level.
*/
TilingScheme.prototype.getNumberOfXTilesAtLevel = DeveloperError.throwInstantiationError;
/**
* Gets the total number of tiles in the Y direction at a specified level-of-detail.
* @function
*
* @param {Number} level The level-of-detail.
* @returns {Number} The number of tiles in the Y direction at the given level.
*/
TilingScheme.prototype.getNumberOfYTilesAtLevel = DeveloperError.throwInstantiationError;
/**
* Transforms an rectangle specified in geodetic radians to the native coordinate system
* of this tiling scheme.
* @function
*
* @param {Rectangle} rectangle The rectangle to transform.
* @param {Rectangle} [result] The instance to which to copy the result, or undefined if a new instance
* should be created.
* @returns {Rectangle} The specified 'result', or a new object containing the native rectangle if 'result'
* is undefined.
*/
TilingScheme.prototype.rectangleToNativeRectangle = DeveloperError.throwInstantiationError;
/**
* Converts tile x, y coordinates and level to an rectangle expressed in the native coordinates
* of the tiling scheme.
* @function
*
* @param {Number} x The integer x coordinate of the tile.
* @param {Number} y The integer y coordinate of the tile.
* @param {Number} level The tile level-of-detail. Zero is the least detailed.
* @param {Object} [result] The instance to which to copy the result, or undefined if a new instance
* should be created.
* @returns {Rectangle} The specified 'result', or a new object containing the rectangle
* if 'result' is undefined.
*/
TilingScheme.prototype.tileXYToNativeRectangle = DeveloperError.throwInstantiationError;
/**
* Converts tile x, y coordinates and level to a cartographic rectangle in radians.
* @function
*
* @param {Number} x The integer x coordinate of the tile.
* @param {Number} y The integer y coordinate of the tile.
* @param {Number} level The tile level-of-detail. Zero is the least detailed.
* @param {Object} [result] The instance to which to copy the result, or undefined if a new instance
* should be created.
* @returns {Rectangle} The specified 'result', or a new object containing the rectangle
* if 'result' is undefined.
*/
TilingScheme.prototype.tileXYToRectangle = DeveloperError.throwInstantiationError;
/**
* Calculates the tile x, y coordinates of the tile containing
* a given cartographic position.
* @function
*
* @param {Cartographic} position The position.
* @param {Number} level The tile level-of-detail. Zero is the least detailed.
* @param {Cartesian} [result] The instance to which to copy the result, or undefined if a new instance
* should be created.
* @returns {Cartesian2} The specified 'result', or a new object containing the tile x, y coordinates
* if 'result' is undefined.
*/
TilingScheme.prototype.positionToTileXY = DeveloperError.throwInstantiationError;
return TilingScheme;
});