Cesium3DTileContent.js

define([
        '../Core/defineProperties',
        '../Core/DeveloperError'
    ], function(
        defineProperties,
        DeveloperError) {
    'use strict';

    /**
     * The content of a tile in a {@link Cesium3DTileset}.
     * <p>
     * Derived classes of this interface provide access to individual features in the tile.
     * Access derived objects through {@link Cesium3DTile#content}.
     * </p>
     * <p>
     * This type describes an interface and is not intended to be instantiated directly.
     * </p>
     *
     * @alias Cesium3DTileContent
     * @constructor
     */
    function Cesium3DTileContent(tileset, tile, url, arrayBuffer, byteOffset) {
        /**
         * Gets or sets if any feature's property changed.  Used to
         * optimized applying a style when a feature's property changed.
         * <p>
         * This is used to implement the <code>Cesium3DTileContent</code> interface, but is
         * not part of the public Cesium API.
         * </p>
         *
         * @type {Boolean}
         *
         * @private
         */
        this.featurePropertiesDirty = false;
    }

    defineProperties(Cesium3DTileContent.prototype, {
        /**
         * Gets the number of features in the tile.
         *
         * @memberof Cesium3DTileContent.prototype
         *
         * @type {Number}
         * @readonly
         */
        featuresLength : {
            get : function() {
                DeveloperError.throwInstantiationError();
            }
        },

        /**
         * Gets the number of points in the tile.
         * <p>
         * Only applicable for tiles with Point Cloud content. This is different than {@link Cesium3DTileContent#featuresLength} which
         * equals the number of groups of points as distinguished by the <code>BATCH_ID</code> feature table semantic.
         * </p>
         *
         * @see {@link https://github.com/AnalyticalGraphicsInc/3d-tiles/blob/master/TileFormats/PointCloud/README.md#batched-points}
         *
         * @memberof Cesium3DTileContent.prototype
         *
         * @type {Number}
         * @readonly
         */
        pointsLength : {
            get : function() {
                DeveloperError.throwInstantiationError();
            }
        },

        /**
         * Gets the number of triangles in the tile.
         *
         * @memberof Cesium3DTileContent.prototype
         *
         * @type {Number}
         * @readonly
         */
        trianglesLength : {
            get : function() {
                DeveloperError.throwInstantiationError();
            }
        },

        /**
         * Gets the tile's geometry memory in bytes.
         *
         * @memberof Cesium3DTileContent.prototype
         *
         * @type {Number}
         * @readonly
         */
        geometryByteLength : {
            get : function() {
                DeveloperError.throwInstantiationError();
            }
        },

        /**
         * Gets the tile's texture memory in bytes.
         *
         * @memberof Cesium3DTileContent.prototype
         *
         * @type {Number}
         * @readonly
         */
        texturesByteLength : {
            get : function() {
                DeveloperError.throwInstantiationError();
            }
        },

        /**
         * Gets the amount of memory used by the batch table textures, in bytes.
         *
         * @memberof Cesium3DTileContent.prototype
         *
         * @type {Number}
         * @readonly
         */
        batchTableByteLength : {
            get : function() {
                DeveloperError.throwInstantiationError();
            }
        },

        /**
         * Gets the array of {@link Cesium3DTileContent} objects that represent the
         * content a composite's inner tiles, which can also be composites.
         *
         * @see {@link https://github.com/AnalyticalGraphicsInc/3d-tiles/blob/master/TileFormats/Composite/README.md}
         *
         * @memberof Cesium3DTileContent.prototype
         *
         * @type {Array}
         * @readonly
         */
        innerContents : {
            get : function() {
                DeveloperError.throwInstantiationError();
            }
        },

        /**
         * Gets the promise that will be resolved when the tile's content is ready to render.
         *
         * @memberof Cesium3DTileContent.prototype
         *
         * @type {Promise.<Cesium3DTileContent>}
         * @readonly
         */
        readyPromise : {
            get : function() {
                DeveloperError.throwInstantiationError();
            }
        },

        /**
         * Gets the tileset for this tile.
         *
         * @type {Cesium3DTileset}
         * @readonly
         */
        tileset : {
            get : function() {
                DeveloperError.throwInstantiationError();
            }
        },

        /**
         * Gets the tile containing this content.
         *
         * @type {Cesium3DTile}
         * @readonly
         */
        tile : {
            get : function() {
                DeveloperError.throwInstantiationError();
            }
        },

        /**
         * Gets the url of the tile's content.
         * @memberof Cesium3DTileContent.prototype
         *
         * @type {String}
         * @readonly
         */
        url : {
            get : function() {
                DeveloperError.throwInstantiationError();
            }
        },

        /**
         * Gets the batch table for this content.
         * <p>
         * This is used to implement the <code>Cesium3DTileContent</code> interface, but is
         * not part of the public Cesium API.
         * </p>
         *
         * @type {Cesium3DTileBatchTable}
         * @readonly
         *
         * @private
         */
        batchTable : {
            get : function() {
                DeveloperError.throwInstantiationError();
            }
        }
    });

    /**
     * Determines if the tile's batch table has a property.  If it does, each feature in
     * the tile will have the property.
     *
     * @param {Number} batchId The batchId for the feature.
     * @param {String} name The case-sensitive name of the property.
     * @returns {Boolean} <code>true</code> if the property exists; otherwise, <code>false</code>.
     */
    Cesium3DTileContent.prototype.hasProperty = function(batchId, name) {
        DeveloperError.throwInstantiationError();
    };

    /**
     * Returns the {@link Cesium3DTileFeature} object for the feature with the
     * given <code>batchId</code>.  This object is used to get and modify the
     * feature's properties.
     * <p>
     * Features in a tile are ordered by <code>batchId</code>, an index used to retrieve their metadata from the batch table.
     * </p>
     *
     * @see {@link  https://github.com/AnalyticalGraphicsInc/3d-tiles/tree/master/TileFormats/BatchTable}.
     *
     * @param {Number} batchId The batchId for the feature.
     * @returns {Cesium3DTileFeature} The corresponding {@link Cesium3DTileFeature} object.
     *
     * @exception {DeveloperError} batchId must be between zero and {@link Cesium3DTileContent#featuresLength} - 1.
     */
    Cesium3DTileContent.prototype.getFeature = function(batchId) {
        DeveloperError.throwInstantiationError();
    };

    /**
     * Called when {@link Cesium3DTileset#debugColorizeTiles} changes.
     * <p>
     * This is used to implement the <code>Cesium3DTileContent</code> interface, but is
     * not part of the public Cesium API.
     * </p>
     *
     * @param {Boolean} enabled Whether to enable or disable debug settings.
     * @returns {Cesium3DTileFeature} The corresponding {@link Cesium3DTileFeature} object.

     * @private
     */
    Cesium3DTileContent.prototype.applyDebugSettings = function(enabled, color) {
        DeveloperError.throwInstantiationError();
    };

    /**
     * Apply a style to the content
     * <p>
     * This is used to implement the <code>Cesium3DTileContent</code> interface, but is
     * not part of the public Cesium API.
     * </p>
     *
     * @param {FrameSate} frameState The frame state.
     * @param {Cesium3DTileStyle} style The style.
     *
     * @private
     */
    Cesium3DTileContent.prototype.applyStyle = function(frameState, style) {
        DeveloperError.throwInstantiationError();
    };

    /**
     * Called by the tile during tileset traversal to get the draw commands needed to render this content.
     * When the tile's content is in the PROCESSING state, this creates WebGL resources to ultimately
     * move to the READY state.
     * <p>
     * This is used to implement the <code>Cesium3DTileContent</code> interface, but is
     * not part of the public Cesium API.
     * </p>
     *
     * @param {Cesium3DTileset} tileset The tileset containing this tile.
     * @param {FrameState} frameState The frame state.
     *
     * @private
     */
    Cesium3DTileContent.prototype.update = function(tileset, frameState) {
        DeveloperError.throwInstantiationError();
    };

    /**
     * Returns true if this object was destroyed; otherwise, false.
     * <br /><br />
     * If this object was destroyed, it should not be used; calling any function other than
     * <code>isDestroyed</code> will result in a {@link DeveloperError} exception.
     * <p>
     * This is used to implement the <code>Cesium3DTileContent</code> interface, but is
     * not part of the public Cesium API.
     * </p>
     *
     * @returns {Boolean} <code>true</code> if this object was destroyed; otherwise, <code>false</code>.
     *
     * @see Cesium3DTileContent#destroy
     *
     * @private
     */
    Cesium3DTileContent.prototype.isDestroyed = function() {
        DeveloperError.throwInstantiationError();
    };

    /**
     * Destroys the WebGL resources held by this object.  Destroying an object allows for deterministic
     * release of WebGL resources, instead of relying on the garbage collector to destroy this object.
     * <br /><br />
     * Once an object is destroyed, it should not be used; calling any function other than
     * <code>isDestroyed</code> will result in a {@link DeveloperError} exception.  Therefore,
     * assign the return value (<code>undefined</code>) to the object as done in the example.
     * <p>
     * This is used to implement the <code>Cesium3DTileContent</code> interface, but is
     * not part of the public Cesium API.
     * </p>
     *
     * @exception {DeveloperError} This object was destroyed, i.e., destroy() was called.
     *
     * @example
     * content = content && content.destroy();
     *
     * @see Cesium3DTileContent#isDestroyed
     *
     * @private
     */
    Cesium3DTileContent.prototype.destroy = function() {
        DeveloperError.throwInstantiationError();
    };

    return Cesium3DTileContent;
});