Add existing to tracked

node_modules/@cesium/engine/Source/Scene/StyleExpression.js

@@ -0,0 +1,86 @@
+import DeveloperError from "../Core/DeveloperError.js";
+
+/**
+ * An expression for a style applied to a {@link Cesium3DTileset}.
+ * <p>
+ * Derived classes of this interface evaluate expressions in the
+ * {@link https://github.com/CesiumGS/3d-tiles/tree/main/specification/Styling|3D Tiles Styling language}.
+ * </p>
+ * <p>
+ * This type describes an interface and is not intended to be instantiated directly.
+ * </p>
+ *
+ * @alias StyleExpression
+ * @constructor
+ *
+ * @see Expression
+ * @see ConditionsExpression
+ */
+function StyleExpression() {}
+
+/**
+ * Evaluates the result of an expression, optionally using the provided feature's properties. If the result of
+ * the expression in the
+ * {@link https://github.com/CesiumGS/3d-tiles/tree/main/specification/Styling|3D Tiles Styling language}
+ * is of type <code>Boolean</code>, <code>Number</code>, or <code>String</code>, the corresponding JavaScript
+ * primitive type will be returned. If the result is a <code>RegExp</code>, a Javascript <code>RegExp</code>
+ * object will be returned. If the result is a <code>Cartesian2</code>, <code>Cartesian3</code>, or <code>Cartesian4</code>,
+ * a {@link Cartesian2}, {@link Cartesian3}, or {@link Cartesian4} object will be returned. If the <code>result</code> argument is
+ * a {@link Color}, the {@link Cartesian4} value is converted to a {@link Color} and then returned.
+ *
+ * @param {Cesium3DTileFeature} feature The feature whose properties may be used as variables in the expression.
+ * @param {object} [result] The object onto which to store the result.
+ * @returns {boolean|number|string|RegExp|Cartesian2|Cartesian3|Cartesian4|Color} The result of evaluating the expression.
+ */
+StyleExpression.prototype.evaluate = function (feature, result) {
+  DeveloperError.throwInstantiationError();
+};
+
+/**
+ * Evaluates the result of a Color expression, optionally using the provided feature's properties.
+ * <p>
+ * This is equivalent to {@link StyleExpression#evaluate} but always returns a {@link Color} object.
+ * </p>
+ *
+ * @param {Cesium3DTileFeature} feature The feature whose properties may be used as variables in the expression.
+ * @param {Color} [result] The object in which to store the result.
+ * @returns {Color} The modified result parameter or a new Color instance if one was not provided.
+ */
+StyleExpression.prototype.evaluateColor = function (feature, result) {
+  DeveloperError.throwInstantiationError();
+};
+
+/**
+ * Gets the shader function for this expression.
+ * Returns undefined if the shader function can't be generated from this expression.
+ *
+ * @param {string} functionSignature Signature of the generated function.
+ * @param {object} variableSubstitutionMap Maps variable names to shader variable names.
+ * @param {object} shaderState Stores information about the generated shader function, including whether it is translucent.
+ * @param {string} returnType The return type of the generated function.
+ *
+ * @returns {string} The shader function.
+ *
+ * @private
+ */
+StyleExpression.prototype.getShaderFunction = function (
+  functionSignature,
+  variableSubstitutionMap,
+  shaderState,
+  returnType,
+) {
+  DeveloperError.throwInstantiationError();
+};
+
+/**
+ * Gets the variables used by the expression.
+ *
+ * @returns {string[]} The variables used by the expression.
+ *
+ * @private
+ */
+StyleExpression.prototype.getVariables = function () {
+  DeveloperError.throwInstantiationError();
+};
+
+export default StyleExpression;