import type { ConstraintBlock4 } from './constraint-block4.js';
import type { ConstraintRow4 } from './constraint-row4.js';
import { PlanarRotationCoordinate4, type PlanarRotationCoordinateEvaluation4 } from './planar-rotation-coordinate4.js';
export interface PlanarRotationMotor4Options {
    readonly coordinate: PlanarRotationCoordinate4;
    /** Positive follows the coordinate's oriented complementary-plane generator. */
    readonly targetSpeed: number;
    /** Symmetric generalized torque limit. */
    readonly maxTorque: number;
}
export interface PlanarRotationMotorConstraint4 {
    readonly status: 'regular';
    readonly coordinate: Extract<PlanarRotationCoordinateEvaluation4, {
        readonly status: 'regular';
    }>;
    readonly block: ConstraintBlock4;
    readonly phaseRow: ConstraintRow4;
    readonly targetSpeed: number;
    readonly maxTorque: number;
}
export type PlanarRotationMotorEvaluation4 = PlanarRotationMotorConstraint4 | Exclude<PlanarRotationCoordinateEvaluation4, {
    readonly status: 'regular';
}>;
/** Torque-limited velocity motor for a continuous planar SO(2) coordinate. */
export declare class PlanarRotationMotor4 {
    readonly coordinate: PlanarRotationCoordinate4;
    targetSpeed: number;
    maxTorque: number;
    constructor(options: PlanarRotationMotor4Options);
    constraint(options?: {
        readonly halfTurnDirection?: 1 | -1;
    }): PlanarRotationMotorEvaluation4;
    private assertPolicy;
}
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