import type { Vec3 } from './lod-geometry-types.js';
/** Normalize IFC bytes into a tightly-sized ArrayBuffer. */
export declare function toIfcArrayBuffer(input: ArrayBuffer | Uint8Array): ArrayBuffer;
/**
 * Normalize IFC type names to canonical PascalCase (e.g. "IFCWALL" → "IfcWall").
 * For multi-word uppercase types (e.g. "IFCWALLSTANDARDCASE") we pass through
 * as-is since we cannot recover PascalCase without a full type registry lookup.
 */
export declare function normalizeIfcTypeName(typeName: string): string;
export declare function vec3(x: number, y: number, z: number): Vec3;
export declare function vec3Cross(a: Vec3, b: Vec3): Vec3;
export declare function vec3Normalize(a: Vec3, fallback: Vec3): Vec3;
export declare function mat4Identity(): Float64Array;
/** Row-major 4x4 multiply: out = a * b */
export declare function mat4Mul(a: Float64Array, b: Float64Array): Float64Array;
export declare function mat4FromBasisTranslation(xAxis: Vec3, yAxis: Vec3, zAxis: Vec3, t: Vec3): Float64Array;
export declare function mat4TransformPoint(m: Float64Array, p: Vec3): Vec3;
export declare function aabbFromPoints(points: Vec3[]): {
    min: Vec3;
    max: Vec3;
};
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