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import Check from "../Core/Check.js";
import defined from "../Core/defined.js";
import MetadataType from "./MetadataType.js";
import OrientedBoundingBox from "../Core/OrientedBoundingBox.js";
/**
* A cell from a {@link VoxelPrimitive}.
* <p>
* Provides access to properties associated with one cell of a voxel primitive.
* </p>
* <p>
* Do not construct this directly. Access it through picking using {@link Scene#pickVoxel}.
* </p>
*
* @alias VoxelCell
* @constructor
*
* @param {VoxelPrimitive} primitive The voxel primitive containing the cell
* @param {number} tileIndex The index of the tile
* @param {number} sampleIndex The index of the sample within the tile, containing metadata for this cell
*
* @example
* // On left click, display all the properties for a voxel cell in the console log.
* handler.setInputAction(function(movement) {
* const voxelCell = scene.pickVoxel(movement.position);
* if (voxelCell instanceof Cesium.VoxelCell) {
* const propertyIds = voxelCell.getPropertyIds();
* const length = propertyIds.length;
* for (let i = 0; i < length; ++i) {
* const propertyId = propertyIds[i];
* console.log(`{propertyId}: ${voxelCell.getProperty(propertyId)}`);
* }
* }
* }, Cesium.ScreenSpaceEventType.LEFT_CLICK);
*
* @experimental This feature is not final and is subject to change without Cesium's standard deprecation policy.
*/
function VoxelCell(primitive, tileIndex, sampleIndex) {
this._primitive = primitive;
this._tileIndex = tileIndex;
this._sampleIndex = sampleIndex;
this._metadata = {};
this._orientedBoundingBox = new OrientedBoundingBox();
}
/**
* Construct a VoxelCell, and update the metadata and bounding box using the properties
* of a supplied keyframe node.
*
* @private
* @param {VoxelPrimitive} primitive The voxel primitive containing the cell.
* @param {number} tileIndex The index of the tile.
* @param {number} sampleIndex The index of the sample within the tile, containing metadata for this cell.
* @param {KeyframeNode} keyframeNode The keyframe node containing information about the tile.
* @returns {VoxelCell}
*
* @experimental This feature is not final and is subject to change without Cesium's standard deprecation policy.
*/
VoxelCell.fromKeyframeNode = function (
primitive,
tileIndex,
sampleIndex,
keyframeNode,
) {
//>>includeStart('debug', pragmas.debug);
Check.typeOf.object("primitive", primitive);
Check.typeOf.number("tileIndex", tileIndex);
Check.typeOf.number("sampleIndex", sampleIndex);
Check.typeOf.object("keyframeNode", keyframeNode);
//>>includeEnd('debug');
const voxelCell = new VoxelCell(primitive, tileIndex, sampleIndex);
const { spatialNode, content } = keyframeNode;
voxelCell._metadata = getMetadataForSample(primitive, content, sampleIndex);
voxelCell._orientedBoundingBox = getOrientedBoundingBox(
primitive,
spatialNode,
sampleIndex,
voxelCell._orientedBoundingBox,
);
return voxelCell;
};
/**
* @private
* @param {VoxelPrimitive} primitive
* @param {VoxelContent} content
* @param {number} sampleIndex
* @returns {object}
*/
function getMetadataForSample(primitive, content, sampleIndex) {
Iif (!defined(content) || !defined(content.metadata)) {
return undefined;
}
const { names, types } = primitive.provider;
const { metadata } = content;
const metadataMap = {};
for (let i = 0; i < names.length; i++) {
const name = names[i];
const componentCount = MetadataType.getComponentCount(types[i]);
const samples = metadata[i].slice(
sampleIndex * componentCount,
(sampleIndex + 1) * componentCount,
);
metadataMap[name] = samples;
}
return metadataMap;
}
const tileCoordinateScratch = new Cartesian3();
const tileUvScratch = new Cartesian3();
/**
* @private
* @param {VoxelPrimitive} primitive
* @param {SpatialNode} spatialNode
* @param {OrientedBoundingBox} result
* @returns {OrientedBoundingBox}
*/
function getOrientedBoundingBox(primitive, spatialNode, sampleIndex, result) {
// Convert the sample index into a 3D tile coordinate
// Note: dimensions from the spatialNode include padding
const paddedDimensions = spatialNode.dimensions;
const sliceSize = paddedDimensions.x * paddedDimensions.y;
const zIndex = Math.floor(sampleIndex / sliceSize);
const indexInSlice = sampleIndex - zIndex * sliceSize;
const yIndex = Math.floor(indexInSlice / paddedDimensions.x);
const xIndex = indexInSlice - yIndex * paddedDimensions.x;
const tileCoordinate = Cartesian3.fromElements(
xIndex,
yIndex,
zIndex,
tileCoordinateScratch,
);
// Remove padding, and convert to a fraction in [0, 1], where the limits are
// the unpadded bounds of the tile
const tileUv = Cartesian3.divideComponents(
Cartesian3.subtract(
tileCoordinate,
primitive._paddingBefore,
tileCoordinateScratch,
),
primitive.dimensions,
tileUvScratch,
);
const shape = primitive._shape;
return shape.computeOrientedBoundingBoxForSample(
spatialNode,
primitive.dimensions,
tileUv,
result,
);
}
Object.defineProperties(VoxelCell.prototype, {
/**
* Gets an object of the metadata values for this cell. The object's keys are the metadata names.
*
* @memberof VoxelCell.prototype
*
* @type {object}
*
* @readonly
* @private
*/
metadata: {
get: function () {
return this._metadata;
},
},
/**
* All objects returned by {@link Scene#pick} have a <code>primitive</code> property. This returns
* the VoxelPrimitive containing the cell.
*
* @memberof VoxelCell.prototype
*
* @type {VoxelPrimitive}
*
* @readonly
*/
primitive: {
get: function () {
return this._primitive;
},
},
/**
* Get the sample index of the cell.
*
* @memberof VoxelCell.prototype
*
* @type {number}
*
* @readonly
*/
sampleIndex: {
get: function () {
return this._sampleIndex;
},
},
/**
* Get the index of the tile containing the cell.
*
* @memberof VoxelCell.prototype
*
* @type {number}
*
* @readonly
*/
tileIndex: {
get: function () {
return this._tileIndex;
},
},
/**
* Get a copy of the oriented bounding box containing the cell.
*
* @memberof VoxelCell.prototype
*
* @type {OrientedBoundingBox}
*
* @readonly
*/
orientedBoundingBox: {
get: function () {
return this._orientedBoundingBox.clone();
},
},
});
/**
* Returns <code>true</code> if the feature contains this property.
*
* @param {string} name The case-sensitive name of the property.
* @returns {boolean} Whether the feature contains this property.
*/
VoxelCell.prototype.hasProperty = function (name) {
return defined(this._metadata[name]);
};
/**
* Returns an array of metadata property names for the feature.
*
* @returns {string[]} The IDs of the feature's properties.
*/
VoxelCell.prototype.getNames = function () {
return Object.keys(this._metadata);
};
/**
* Returns a copy of the value of the metadata in the cell with the given name.
*
* @param {string} name The case-sensitive name of the property.
* @returns {*} The value of the property or <code>undefined</code> if the feature does not have this property.
*
* @example
* // Display all the properties for a voxel cell in the console log.
* const names = voxelCell.getNames();
* for (let i = 0; i < names.length; ++i) {
* const name = names[i];
* console.log(`{name}: ${voxelCell.getProperty(name)}`);
* }
*/
VoxelCell.prototype.getProperty = function (name) {
return this._metadata[name];
};
export default VoxelCell;
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