@cesium/engine/Source/Core/GeometryAttributes.js

CesiumJS is a JavaScript library for creating 3D globes and 2D maps in a web browser without a plugin.

import Frozen from "./Frozen.js";

/**
 * Attributes, which make up a geometry's vertices.  Each property in this object corresponds to a
 * {@link GeometryAttribute} containing the attribute's data.
 * <p>
 * Attributes are always stored non-interleaved in a Geometry.
 * </p>
 *
 * @alias GeometryAttributes
 * @constructor
 */
function GeometryAttributes(options) {
  options = options ?? Frozen.EMPTY_OBJECT;

  /**
   * The 3D position attribute.
   * <p>
   * 64-bit floating-point (for precision).  3 components per attribute.
   * </p>
   *
   * @type {GeometryAttribute|undefined}
   *
   * @default undefined
   */
  this.position = options.position;

  /**
   * The normal attribute (normalized), which is commonly used for lighting.
   * <p>
   * 32-bit floating-point.  3 components per attribute.
   * </p>
   *
   * @type {GeometryAttribute|undefined}
   *
   * @default undefined
   */
  this.normal = options.normal;

  /**
   * The 2D texture coordinate attribute.
   * <p>
   * 32-bit floating-point.  2 components per attribute
   * </p>
   *
   * @type {GeometryAttribute|undefined}
   *
   * @default undefined
   */
  this.st = options.st;

  /**
   * The bitangent attribute (normalized), which is used for tangent-space effects like bump mapping.
   * <p>
   * 32-bit floating-point.  3 components per attribute.
   * </p>
   *
   * @type {GeometryAttribute|undefined}
   *
   * @default undefined
   */
  this.bitangent = options.bitangent;

  /**
   * The tangent attribute (normalized), which is used for tangent-space effects like bump mapping.
   * <p>
   * 32-bit floating-point.  3 components per attribute.
   * </p>
   *
   * @type {GeometryAttribute|undefined}
   *
   * @default undefined
   */
  this.tangent = options.tangent;

  /**
   * The color attribute.
   * <p>
   * 8-bit unsigned integer. 4 components per attribute.
   * </p>
   *
   * @type {GeometryAttribute|undefined}
   *
   * @default undefined
   */
  this.color = options.color;
}
export default GeometryAttributes;