@animech-public/playcanvas/build/playcanvas.dbg/src/platform/graphics/scope-space.js

PlayCanvas WebGL game engine

import { ScopeId } from './scope-id.js';

/**
 * The scope for variables.
 *
 * @category Graphics
 */
class ScopeSpace {
  /**
   * Create a new ScopeSpace instance.
   *
   * @param {string} name - The scope name.
   */
  constructor(name) {
    /**
     * The scope name.
     *
     * @type {string}
     */
    this.name = name;

    // Create map which maps a uniform name into ScopeId
    this.variables = new Map();
  }

  /**
   * Get (or create, if it doesn't already exist) a variable in the scope.
   *
   * @param {string} name - The variable name.
   * @returns {ScopeId} The variable instance.
   */
  resolve(name) {
    // add new ScopeId if it does not exist yet
    if (!this.variables.has(name)) {
      this.variables.set(name, new ScopeId(name));
    }

    // return the ScopeId instance
    return this.variables.get(name);
  }

  /**
   * Clears value for any uniform with matching value (used to remove deleted textures).
   *
   * @param {*} value - The value to clear.
   * @ignore
   */
  removeValue(value) {
    for (const uniformName in this.variables) {
      const uniform = this.variables[uniformName];
      if (uniform.value === value) {
        uniform.value = null;
      }
    }
  }
}

export { ScopeSpace };