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- import clone from "../Core/clone.js";
- import defined from "../Core/defined.js";
- import Expression from "./Expression.js";
- function ConditionsExpression(conditionsExpression, defines) {
- this._conditionsExpression = clone(conditionsExpression, true);
- this._conditions = conditionsExpression.conditions;
- this._runtimeConditions = undefined;
- setRuntime(this, defines);
- }
- Object.defineProperties(ConditionsExpression.prototype, {
-
- conditionsExpression: {
- get: function () {
- return this._conditionsExpression;
- },
- },
- });
- function Statement(condition, expression) {
- this.condition = condition;
- this.expression = expression;
- }
- function setRuntime(expression, defines) {
- var runtimeConditions = [];
- var conditions = expression._conditions;
- if (!defined(conditions)) {
- return;
- }
- var length = conditions.length;
- for (var i = 0; i < length; ++i) {
- var statement = conditions[i];
- var cond = String(statement[0]);
- var condExpression = String(statement[1]);
- runtimeConditions.push(
- new Statement(
- new Expression(cond, defines),
- new Expression(condExpression, defines)
- )
- );
- }
- expression._runtimeConditions = runtimeConditions;
- }
- ConditionsExpression.prototype.evaluate = function (feature, result) {
- var conditions = this._runtimeConditions;
- if (!defined(conditions)) {
- return undefined;
- }
- var length = conditions.length;
- for (var i = 0; i < length; ++i) {
- var statement = conditions[i];
- if (statement.condition.evaluate(feature)) {
- return statement.expression.evaluate(feature, result);
- }
- }
- };
- ConditionsExpression.prototype.evaluateColor = function (feature, result) {
- var conditions = this._runtimeConditions;
- if (!defined(conditions)) {
- return undefined;
- }
- var length = conditions.length;
- for (var i = 0; i < length; ++i) {
- var statement = conditions[i];
- if (statement.condition.evaluate(feature)) {
- return statement.expression.evaluateColor(feature, result);
- }
- }
- };
- ConditionsExpression.prototype.getShaderFunction = function (
- functionName,
- propertyNameMap,
- shaderState,
- returnType
- ) {
- var conditions = this._runtimeConditions;
- if (!defined(conditions) || conditions.length === 0) {
- return undefined;
- }
- var shaderFunction = "";
- var length = conditions.length;
- for (var i = 0; i < length; ++i) {
- var statement = conditions[i];
- var condition = statement.condition.getShaderExpression(
- propertyNameMap,
- shaderState
- );
- var expression = statement.expression.getShaderExpression(
- propertyNameMap,
- shaderState
- );
-
- shaderFunction +=
- " " +
- (i === 0 ? "if" : "else if") +
- " (" +
- condition +
- ") \n" +
- " { \n" +
- " return " +
- expression +
- "; \n" +
- " } \n";
- }
- shaderFunction =
- returnType +
- " " +
- functionName +
- "() \n" +
- "{ \n" +
- shaderFunction +
- " return " +
- returnType +
- "(1.0); \n" +
- "} \n";
- return shaderFunction;
- };
- export default ConditionsExpression;
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