import Check from "./Check.js";
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import ComponentDatatype from "./ComponentDatatype.js";
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import defaultValue from "./defaultValue.js";
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import defined from "./defined.js";
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/**
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* Value and type information for per-instance geometry attribute that determines the geometry instance offset
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*
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* @alias OffsetGeometryInstanceAttribute
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* @constructor
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*
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* @param {Number} [x=0] The x translation
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* @param {Number} [y=0] The y translation
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* @param {Number} [z=0] The z translation
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*
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* @private
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*
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* @see GeometryInstance
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* @see GeometryInstanceAttribute
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*/
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function OffsetGeometryInstanceAttribute(x, y, z) {
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x = defaultValue(x, 0);
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y = defaultValue(y, 0);
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z = defaultValue(z, 0);
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/**
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* The values for the attributes stored in a typed array.
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*
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* @type Float32Array
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*/
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this.value = new Float32Array([x, y, z]);
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}
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Object.defineProperties(OffsetGeometryInstanceAttribute.prototype, {
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/**
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* The datatype of each component in the attribute, e.g., individual elements in
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* {@link OffsetGeometryInstanceAttribute#value}.
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*
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* @memberof OffsetGeometryInstanceAttribute.prototype
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*
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* @type {ComponentDatatype}
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* @readonly
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*
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* @default {@link ComponentDatatype.FLOAT}
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*/
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componentDatatype: {
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get: function () {
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return ComponentDatatype.FLOAT;
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},
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},
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/**
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* The number of components in the attributes, i.e., {@link OffsetGeometryInstanceAttribute#value}.
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*
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* @memberof OffsetGeometryInstanceAttribute.prototype
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*
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* @type {Number}
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* @readonly
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*
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* @default 3
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*/
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componentsPerAttribute: {
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get: function () {
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return 3;
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},
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},
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/**
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* When <code>true</code> and <code>componentDatatype</code> is an integer format,
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* indicate that the components should be mapped to the range [0, 1] (unsigned)
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* or [-1, 1] (signed) when they are accessed as floating-point for rendering.
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*
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* @memberof OffsetGeometryInstanceAttribute.prototype
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*
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* @type {Boolean}
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* @readonly
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*
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* @default false
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*/
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normalize: {
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get: function () {
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return false;
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},
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},
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});
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/**
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* Creates a new {@link OffsetGeometryInstanceAttribute} instance given the provided an enabled flag and {@link DistanceDisplayCondition}.
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*
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* @param {Cartesian3} offset The cartesian offset
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* @returns {OffsetGeometryInstanceAttribute} The new {@link OffsetGeometryInstanceAttribute} instance.
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*/
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OffsetGeometryInstanceAttribute.fromCartesian3 = function (offset) {
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//>>includeStart('debug', pragmas.debug);
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Check.defined("offset", offset);
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//>>includeEnd('debug');
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return new OffsetGeometryInstanceAttribute(offset.x, offset.y, offset.z);
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};
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/**
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* Converts a distance display condition to a typed array that can be used to assign a distance display condition attribute.
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*
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* @param {Cartesian3} offset The cartesian offset
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* @param {Float32Array} [result] The array to store the result in, if undefined a new instance will be created.
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* @returns {Float32Array} The modified result parameter or a new instance if result was undefined.
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*
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* @example
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* var attributes = primitive.getGeometryInstanceAttributes('an id');
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* attributes.modelMatrix = Cesium.OffsetGeometryInstanceAttribute.toValue(modelMatrix, attributes.modelMatrix);
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*/
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OffsetGeometryInstanceAttribute.toValue = function (offset, result) {
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//>>includeStart('debug', pragmas.debug);
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Check.defined("offset", offset);
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//>>includeEnd('debug');
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if (!defined(result)) {
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result = new Float32Array([offset.x, offset.y, offset.z]);
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}
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result[0] = offset.x;
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result[1] = offset.y;
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result[2] = offset.z;
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return result;
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};
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export default OffsetGeometryInstanceAttribute;
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