Source: material/PBRMaterial.js

  1. import { MATERIAL_TYPE } from '../const.js';
  2. import { Material } from './Material.js';
  4. /**
  5.  * A standard physically based material, using Metallic-Roughness workflow.
  6.  * Physically based rendering (PBR) has recently become the standard in many 3D applications, such as Unity, Unreal and 3D Studio Max.
  7.  * This approach differs from older approaches in that instead of using approximations for the way in which light interacts with a surface, a physically correct model is used.
  8.  * The idea is that, instead of tweaking materials to look good under specific lighting, a material can	be created that will react 'correctly' under all lighting scenarios.
  9.  * @constructor
  10.  * @extends zen3d.Material
  11.  * @memberof zen3d
  12.  */
  13. function PBRMaterial() {
  14. 	Material.call(this);
  16. 	this.type = MATERIAL_TYPE.PBR;
  18. 	/**
  19.      * How rough the material appears. 0.0 means a smooth mirror reflection, 1.0 means fully diffuse.
  20.      * If roughnessMap is also provided, both values are multiplied.
  21.      * @type {number}
  22.      * @default 0.5
  23.      */
  24. 	this.roughness = 0.5;
  26. 	/**
  27.      * How much the material is like a metal.
  28.      * Non-metallic materials such as wood or stone use 0.0, metallic use 1.0, with nothing (usually) in between.
  29.      * A value between 0.0 and 1.0 could be used for a rusty metal look. If metalnessMap is also provided, both values are multiplied.
  30.      * @type {number}
  31.      * @default 0.5
  32.      */
  33. 	this.metalness = 0.5;
  35. 	/**
  36.      * The green channel of this texture is used to alter the roughness of the material.
  37.      * @type {zen3d.Texture2D}
  38.      * @default null
  39.      */
  40. 	this.roughnessMap = null;
  42. 	/**
  43.      * The blue channel of this texture is used to alter the metalness of the material.
  44.      * @type {zen3d.Texture2D}
  45.      * @default null
  46.      */
  47. 	this.metalnessMap = null;
  49. 	/**
  50.      * PBR material is affected by lights.
  51.      * @type {boolean}
  52.      * @default true
  53.      */
  54. 	this.acceptLight = true;
  55. }
  57. PBRMaterial.prototype = Object.assign(Object.create(Material.prototype), /** @lends zen3d.PBRMaterial.prototype */{
  59. 	constructor: PBRMaterial,
  61. 	copy: function(source) {
  62. 		Material.prototype.copy.call(this, source);
  64. 		this.roughness = source.roughness;
  65. 		this.metalness = source.metalness;
  66. 		this.roughnessMap = source.roughnessMap;
  67. 		this.metalnessMap = source.metalnessMap;
  69. 		return this;
  70. 	}
  72. });
  74. export { PBRMaterial };