import type { VirtualAxisSample, VirtualJoystickConfig } from './input-snapshot';
/**
 * Per-joystick binding state. The backend closure owns a
 * Map<string, BindState> keyed by joystick config name.
 */
export interface BindState {
    /** bound pointerId, or undefined if unbound */
    pointerId?: number | undefined;
    /** origin in canvas pixels (anchor for fixed, first-touch for floating) */
    originX: number;
    originY: number;
}
/**
 * Derive one frame of virtual axis outputs from live pointer state and
 * per-joystick binding state.
 *
 * Pure function: no DOM access. The backend closure is the SSOT for
 * per-joystick state; binding + origin selection happens in
 * browser-backend.ts onPointerDown. This function only reads bindState
 * and computes per-frame vectors.
 *
 * Unbound joysticks always produce the zero vector.
 *
 * @param configs - configured virtual joysticks
 * @param pointerMap - live pointer positions keyed by pointerId
 * @param bindState - per-joystick binding state (read-only)
 * @returns one VirtualAxisSample per configured joystick
 */
export declare function deriveVirtualAxes(configs: readonly VirtualJoystickConfig[], pointerMap: Map<number, {
    readonly x: number;
    readonly y: number;
}>, bindState: Map<string, BindState>): VirtualAxisSample[];
/**
 * Unbind a joystick when its bound pointer goes up or is cancelled.
 * Sets pointerId to undefined; the next deriveVirtualAxes call will
 * produce a zero vector for the unbound joystick.
 */
export declare function handleVirtualJoystickUnbind(bindState: Map<string, BindState>, pointerId: number): void;
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