import { ConstructorProps, ContextManager, Observable } from '@zcomponent/core';
import * as THREE from 'three';
import { MeshStandardMaterial } from './MeshStandardMaterial';
/**
 * An extension of the MeshStandardMaterial, providing more advanced physically-based rendering properties:
 * - Clearcoat: Some materials — like car paints, carbon fiber, and wet surfaces — require a clear, reflective layer on top of another layer that may be irregular or rough. Clearcoat approximates this effect, without the need for a separate transparent surface.
 * - Physically-based transparency: One limitation of .opacity is that highly transparent materials are less reflective. Physically-based .transmission provides a more realistic option for thin, transparent surfaces like glass.
 * - Advanced reflectivity: More flexible reflectivity for non-metallic materials.
 * - Sheen: Can be used for representing cloth and fabric materials.
 *
 * As a result of these complex shading features, `MeshPhysicalMaterial` has a higher performance cost, per pixel, than other three.js materials.
 * Most effects are disabled by default, and add cost as they are enabled. For best results, always specify an environment map when using this material.
 * Root element: [THREE.MeshPhysicalMaterial](https://threejs.org/docs/index.html#api/en/materials/MeshPhysicalMaterial)
 * @zcomponent
 * @zgroup Materials
 * @zicon material
 * @ztag three/Material/Mesh/MeshPhysicalMaterial
 * @zparents three/Object3D/Mesh/**
 * @zparents three/Object3D/Group/**
 * @zparents three/MaterialHost/**
 */
export declare class MeshPhysicalMaterial extends MeshStandardMaterial {
    element: THREE.MeshPhysicalMaterial;
    /**
     * Constructs a new mesh physical material.
     * @param contextManager - Context manager.
     * @param props - Properties.
     */
    constructor(contextManager: ContextManager, props: ConstructorProps);
    /**
     * The color that white light turns into due to absorption when reaching the attenuation distance.
     * @zprop
     * @zgroup MeshPhysicalMaterial
     * @zgrouppriority 30
     * @ztype color-norm-rgb-linear
     * @zdefault [1, 1, 1]
     */
    attenuationColor: Observable<[number, number, number], never>;
    /**
     * Represents the intensity of the clear coat layer, from 0.0 to 1.0.
     *
     * Use clear coat related properties to enable multilayer materials that have a thin translucent layer over the base layer.
     * @zprop
     * @zgroup MeshPhysicalMaterial
     * @zgrouppriority 30
     * @ztype proportion
     * @zdefault 0
     */
    clearcoat: Observable<number, never>;
    /**
     * How much .clearcoatNormalMap affects the clear coat layer, from (0,0) to (1,1)
     * @zprop
     * @zgroup MeshPhysicalMaterial
     * @zgrouppriority 30
     * @zdefault [1, 1]
     */
    clearcoatNormalScale: Observable<[number, number], never>;
    /**
     * Roughness of the clear coat layer, from 0.0 to 1.0.
     * @zprop
     * @zgroup MeshPhysicalMaterial
     * @zgrouppriority 30
     * @ztype proportion
     * @zdefault 0
     */
    clearcoatRoughness: Observable<number, never>;
    /**
     * Index-of-refraction for non-metallic materials, from 1.0 to 2.333
     * @zprop
     * @zgroup MeshPhysicalMaterial
     * @zgrouppriority 30
     * @zdefault 1.5
     */
    ior: Observable<number, never>;
    /**
     * 	Degree of reflectivity, from 0.0 to 1.0. Corresponds to an index-of-refraction of 1.5.
     *
     *
     * This models the reflectivity of non-metallic materials.
     * It has no effect when metalness is 1.0
     * @zprop
     * @zgroup MeshPhysicalMaterial
     * @zgrouppriority 30
     * @ztype proportion
     * @zdefault 0.5
     */
    reflectivity: Observable<number, never>;
    /**
     * The intensity of the sheen layer, from 0.0 to 1.0
     *
     * @zprop
     * @zgroup MeshPhysicalMaterial
     * @zgrouppriority 30
     * @ztype proportion
     * @zdefault 0
     */
    sheen: Observable<number, never>;
    /**
     * Roughness of the sheen layer, from 0.0 to 1.0
     *
     * @zprop
     * @zgroup MeshPhysicalMaterial
     * @zgrouppriority 30
     * @ztype proportion
     * @zdefault 1
     */
    sheenRoughness: Observable<number, never>;
    /**
     *
     * The sheen tint.
     * @zprop
     * @zgroup MeshPhysicalMaterial
     * @zgrouppriority 30
     * @ztype color-norm-rgb-linear
     * @zdefault [1, 1, 1]
     */
    sheenColor: Observable<[number, number, number], never>;
    /**
     * A float that scales the amount of specular reflection for non-metals only.
     *
     *  When set to zero, the model is effectively Lambertian. From 0.0 to 1.0.
     * @zprop
     * @zgroup MeshPhysicalMaterial
     * @zgrouppriority 30
     * @ztype proportion
     * @zdefault 0
     */
    specularIntensity: Observable<number, never>;
    /**
     * A Color that tints the specular reflection at normal incidence for non-metals only
     *
     * @zprop
     * @zgroup MeshPhysicalMaterial
     * @zgrouppriority 30
     * @ztype color-norm-rgb-linear
     * @zdefault [1, 1, 1]
     */
    specularColor: Observable<[number, number, number], never>;
    /**
     * The thickness of the volume beneath the surface.
     * The value is given in the coordinate space of the mesh.
     *
     * If the value is 0 the material is thin-walled.
     * Otherwise the material is a volume boundary.
     * @zprop
     * @zgroup MeshPhysicalMaterial
     * @zgrouppriority 30
     * @zdefault 0
     */
    thickness: Observable<number, never>;
    /**
     * Degree of transmission (or optical transparency), from 0.0 to 1.0.
     *
     * Thin, transparent or semitransparent, plastic or glass materials remain largely reflective even if they are fully transmissive.
     * The transmission property can be used to model these materials.
     *
     * When transmission is non-zero, opacity should be set to 1.
     * @zprop
     * @zgroup MeshPhysicalMaterial
     * @zgrouppriority 30
     * @ztype proportion
     * @zdefault 0
     */
    transmission: Observable<number, never>;
}