import type * as RAPIER from "@dimforge/rapier3d-compat";
import { CoreContext, CoreContextModule } from "@vladkrutenyuk/three-kvy-core";
import * as THREE from "three";
export type ModulesWithRapierPhysics = {
    rapier: RapierPhysics;
};
export type RapierJsModule = typeof import("@dimforge/rapier3d-compat");
/**
 * @see {@link https://github.com/vladkrutenyuk/three-kvy-core/blob/main/src/addons/RapierPhysics.ts | Source}
 */
export declare class RapierPhysics extends CoreContextModule<{
    stepbefore: [];
    stepafter: [];
}, ModulesWithRapierPhysics> {
    readonly isRapierPhysics: true;
    readonly api: RapierJsModule;
    readonly world: RAPIER.World;
    readonly eventQueue: RAPIER.EventQueue;
    /** @default "vary" */
    timeStep: RapierPhysicsOptions["timeStep"];
    private _steppingState;
    constructor(Rapier: RapierJsModule, options?: Partial<RapierPhysicsOptions>);
    protected useCtx(ctx: CoreContext): () => void;
    private stepWorld;
    static findInCtx(ctx: CoreContext): RapierPhysics | undefined;
}
export interface RapierPhysicsOptions {
    /**
     * Set the gravity of the physics world
     * @defaultValue [0, -9.81, 0]
     */
    gravity: THREE.Vector3Tuple;
    /**
     * Amount of penetration the engine wont attempt to correct
     * @defaultValue 0.001
     */
    allowedLinearError: number;
    /**
     * The number of solver iterations run by the constraints solver for calculating forces.
     * The greater this value is, the most rigid and realistic the physics simulation will be.
     * However a greater number of iterations is more computationally intensive.
     *
     * @defaultValue 4
     */
    numSolverIterations: number;
    /**
     * Number of addition friction resolution iteration run during the last solver sub-step.
     * The greater this value is, the most realistic friction will be.
     * However a greater number of iterations is more computationally intensive.
     *
     * @defaultValue 4
     */
    numAdditionalFrictionIterations: number;
    /**
     * Number of internal Project Gauss Seidel (PGS) iterations run at each solver iteration.
     * Increasing this parameter will improve stability of the simulation. It will have a lesser effect than
     * increasing `numSolverIterations` but is also less computationally expensive.
     *
     * @defaultValue 1
     */
    numInternalPgsIterations: number;
    /**
     * The maximal distance separating two objects that will generate predictive contacts
     *
     * @defaultValue 0.002
     *
     */
    predictionDistance: number;
    /**
     * Minimum number of dynamic bodies in each active island
     *
     * @defaultValue 128
     */
    minIslandSize: number;
    /**
     * Maximum number of substeps performed by the solver
     *
     * @defaultValue 1
     */
    maxCcdSubsteps: number;
    /**
     * Directly affects the `erp` (Error Reduction Parameter) which is the proportion (0 to 1) of the positional error to be corrected at each time step.
     * The higher this value is, the more the physics engine will try to correct errors.
     *
     * This prop is currently undocumented in the Rapier documentation.
     *
     * @see https://github.com/dimforge/rapier/pull/651 where this change was made to Rapier
     * @defaultValue 30
     */
    contactNaturalFrequency: number;
    /**
     * The approximate size of most dynamic objects in the scene.
     *
     * This value is used internally to estimate some length-based tolerance.
     * This value can be understood as the number of units-per-meter in your physical world compared to a human-sized world in meter.
     *
     * @defaultValue 1
     */
    lengthUnit: number;
    /**
     * Set the timestep for the simulation.
     * Setting this to a number (eg. 1/60) will run the
     * simulation at that framerate. Alternatively, you can set this to
     * "vary", which will cause the simulation to always synchronize with
     * the current frame delta times.
     *
     * @defaultValue 1/60
     */
    timeStep: number | "vary";
    /**
     * Pause the physics simulation
     *
     * @defaultValue false
     */
    paused: boolean;
    /**
     * Interpolate the world transform using the frame delta times.
     * Has no effect if timeStep is set to "vary".
     *
     * @defaultValue true
     **/
    interpolate: boolean;
    /**
     * Enable debug rendering of the physics world.
     * @defaultValue false
     */
    debug: boolean;
}