import { Component } from '@zcomponent/core';
import { ContextManager, Observable } from '@zcomponent/core';
import { CombineMode } from '../index';
/**
 * A collider that uses a shape to define its collision volume.
 * This collider should be child of a RigidBody.
 * @zcomponent
 * @zgroup Physics
 * @zicon science
 * @zparents three/Object3D/Group/Physics/Collider
 */
export declare class PhysicsMaterial extends Component {
    props: {};
    defaultMaterial: boolean;
    constructor(ctx: ContextManager, props: {});
    /**
     * Sets the restitution of the physics material.
     *
     * The restitution is a factor which describes, the amount of energy that is retained after a collision,
     * which should be a number between 0 and 1..
     *
     * A restitution of 0 means that no energy is retained and the objects will not bounce off each other,
     * while a restitution of 1 means that all energy is retained and the objects will bounce.
     *
     * Note, though, due that due to the simulation implementation, an object with a restitution of 1 may
     * still lose energy over time.
     *
     * If not provided, a default value of 0 will be used.
     * @zprop
     * @zdefault 0
     * @ztype proportion
     */
    bounciness: Observable<number>;
    /**
     * Describes how two different restitution values should be combined.
     *
     * When each PhysicsMaterial specifies a different combine mode for some property, the combine mode which
     *
     * GEOMETRIC_MEAN - The final value will be the geometric mean of the two values: sqrt(valueA * valueB).
     *
     * MINIMUM - The final value will be the smaller of the two: min(valueA, valueB).
     *
     * MAXIMUM - The final value will be the larger of the two: max(valueA, valueB).
     *
     * ARITHMETIC_MEAN - The final value will be the arithmetic mean of the two values: (valueA + valueB) / 2.
     *
     * MULTIPLY - The final value will be the product of the two values: valueA * valueB.
     *
     * @zprop
     * @zdefault Maximum
     */
    bouncinessCombine: Observable<CombineMode>;
    /**
     * Sets the friction used by this material
     *
     * The friction determines how much an object will slow down when it is in contact with another object.
     * This is important for simulating realistic physics, such as when an object slides across a surface.
     *
     * If not provided, a default value of 0.5 will be used.
     * @zprop
     * @zdefault 0.5
     * @ztype proportion
     */
    friction: Observable<number>;
    /**
     * Sets the static friction used by this material.
     *
     * Static friction is the friction that must be overcome before a pair of objects can start sliding
     * relative to each other; for physically-realistic behaviour, it should be at least as high as the
     * normal friction value. If not provided, the friction value will be used
     * @zprop
     * @zdefault 0.5
     * @ztype proportion
     */
    staticFriction: Observable<number | undefined>;
    /**
     * Determines how values from the PhysicsMaterial are combined when two objects are in contact.
     * When each PhysicsMaterial specifies a different combine mode for some property, the combine mode which
     *
     * GEOMETRIC_MEAN - The final value will be the geometric mean of the two values: sqrt(valueA * valueB).
     *
     * MINIMUM - The final value will be the smaller of the two: min(valueA, valueB).
     *
     * MAXIMUM - The final value will be the larger of the two: max(valueA, valueB).
     *
     * ARITHMETIC_MEAN - The final value will be the arithmetic mean of the two values: (valueA + valueB) / 2.
     *
     * MULTIPLY - The final value will be the product of the two values: valueA * valueB.
     *
     * @zprop
     * @zdefault Minimum
     */
    frictionCombine: Observable<CombineMode>;
}