@openhps/core/dist/esm/three/nodes/core/ConstNode.js

Open Hybrid Positioning System - Core component

import InputNode from './InputNode.js';
const _regNum = /float|u?int/;

/**
 * Class for representing a constant value in the shader.
 *
 * @augments InputNode
 */
class ConstNode extends InputNode {
  static get type() {
    return 'ConstNode';
  }

  /**
   * Constructs a new input node.
   *
   * @param {any} value - The value of this node. Usually a JS primitive or three.js object (vector, matrix, color).
   * @param {?string} nodeType - The node type. If no explicit type is defined, the node tries to derive the type from its value.
   */
  constructor(value, nodeType = null) {
    super(value, nodeType);

    /**
     * This flag can be used for type testing.
     *
     * @type {boolean}
     * @readonly
     * @default true
     */
    this.isConstNode = true;
  }

  /**
   * Generates the shader string of the value with the current node builder.
   *
   * @param {NodeBuilder} builder - The current node builder.
   * @return {string} The generated value as a shader string.
   */
  generateConst(builder) {
    return builder.generateConst(this.getNodeType(builder), this.value);
  }
  generate(builder, output) {
    const type = this.getNodeType(builder);
    if (_regNum.test(type) && _regNum.test(output)) {
      return builder.generateConst(output, this.value);
    }
    return builder.format(this.generateConst(builder), type, output);
  }
}
export default ConstNode;