/**
 * Manifold-based AST Evaluator
 *
 * Functional, DRY approach to evaluating OpenSCAD AST nodes using manifold-3d.
 * This module provides a clean interface that mirrors the WASM evaluator structure
 * but uses manifold primitives and operations instead.
 */
import type { ManifoldObject, ManifoldWithMeta } from './types';
import type { Geometry } from '../types/geometry-types';
export interface EvalContext {
    variables: Map<string, any>;
    $fn: number;
    $fa: number;
    $fs: number;
}
export interface EvalParams {
    [key: string]: any;
}
export declare function ensureManifoldReady(): Promise<void>;
/**
 * Calculate fragment count for circular primitives (OpenSCAD spec)
 */
export declare function calculateFragments(radius: number, fn: number, fs: number, fa: number): number;
/**
 * Extract a parameter with fallbacks and defaults
 */
export declare function getParam<T>(params: EvalParams, names: string[], defaultValue: T): T;
/**
 * Extract radius from various parameter formats (r, radius, d, diameter)
 */
export declare function extractRadius(params: EvalParams, defaultValue?: number): number;
/**
 * Extract size parameter (number or array)
 */
export declare function extractSize(params: EvalParams, defaultValue?: number): number | [number, number, number];
/**
 * Evaluate a primitive node
 */
export declare function evalPrimitive(op: string, params: EvalParams, ctx: EvalContext): ManifoldObject;
/**
 * Evaluate a transform node
 */
export declare function evalTransform(op: string, manifold: ManifoldObject, params: EvalParams, ctx: EvalContext): ManifoldObject;
/**
 * Evaluate a boolean operation
 */
export declare function evalBoolean(op: string, manifolds: ManifoldObject[]): ManifoldObject;
export interface NodeMetadata {
    modifier?: '#' | '%' | '!' | '*';
    color?: [number, number, number, number];
    objectId?: string;
    line?: number;
}
/**
 * Apply metadata to a manifold
 */
export declare function applyMetadata(manifold: ManifoldObject, metadata: NodeMetadata): ManifoldWithMeta;
/**
 * Extract metadata from a node
 */
export declare function extractMetadata(node: any): NodeMetadata;
/**
 * Convert manifold to moicad Geometry format
 */
export declare function toGeometry(manifold: ManifoldObject | ManifoldWithMeta): Geometry;
/**
 * Create a default evaluation context
 */
export declare function createDefaultContext(): EvalContext;
/**
 * Update context with special variables
 */
export declare function updateContext(ctx: EvalContext, variables: Record<string, any>): EvalContext;
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