@openhps/core/src/three/renderers/common/StorageInstancedBufferAttribute.js

Open Hybrid Positioning System - Core component

"use strict";

Object.defineProperty(exports, "__esModule", {
  value: true
});
exports.default = void 0;
var _InstancedBufferAttribute = require("../../core/InstancedBufferAttribute.js");
/**
 * This special type of instanced buffer attribute is intended for compute shaders.
 * In earlier three.js versions it was only possible to update attribute data
 * on the CPU via JavaScript and then upload the data to the GPU. With the
 * new material system and renderer it is now possible to use compute shaders
 * to compute the data for an attribute more efficiently on the GPU.
 *
 * The idea is to create an instance of this class and provide it as an input
 * to {@link StorageBufferNode}.
 *
 * Note: This type of buffer attribute can only be used with `WebGPURenderer`.
 *
 * @augments InstancedBufferAttribute
 */
class StorageInstancedBufferAttribute extends _InstancedBufferAttribute.InstancedBufferAttribute {
  /**
   * Constructs a new storage instanced buffer attribute.
   *
   * @param {number|TypedArray} count - The item count. It is also valid to pass a typed array as an argument.
   * The subsequent parameters are then obsolete.
   * @param {number} itemSize - The item size.
   * @param {TypedArray.constructor} [typeClass=Float32Array] - A typed array constructor.
   */
  constructor(count, itemSize, typeClass = Float32Array) {
    const array = ArrayBuffer.isView(count) ? count : new typeClass(count * itemSize);
    super(array, itemSize);

    /**
     * This flag can be used for type testing.
     *
     * @type {boolean}
     * @readonly
     * @default true
     */
    this.isStorageInstancedBufferAttribute = true;
  }
}
var _default = exports.default = StorageInstancedBufferAttribute;