export type Vec3 = [number, number, number];
export type LodInput = ArrayBuffer | Uint8Array;
export type Lod0Element = {
    expressID: number;
    globalId: string | null;
    ifcClass: string;
    name: string | null;
    /** Row-major 4x4 world matrix */
    transform: [
        number,
        number,
        number,
        number,
        number,
        number,
        number,
        number,
        number,
        number,
        number,
        number,
        number,
        number,
        number,
        number
    ];
    /** World-space axis-aligned bounding box */
    bbox: {
        min: Vec3;
        max: Vec3;
    };
    centroid: Vec3;
    /** Where bbox came from (required for fallback) */
    bbox_source: 'shape' | 'fallback';
};
export type Lod0Json = {
    schema: 'ifc-lite-geometry';
    lod: 0;
    units: 'm';
    elements: Lod0Element[];
};
export type Lod1MetaJson = {
    schema: 'ifc-lite-geometry';
    lod: 1;
    status: 'ok' | 'degraded';
    fallback?: 'boxes_from_lod0';
    failedElements: number[];
    notes: string[];
    /** expressID -> node/mesh mapping */
    mapping: Record<string, {
        node: number;
        mesh: number;
    }>;
};
export type GenerateLod1Result = {
    glb: Uint8Array;
    meta: Lod1MetaJson;
};
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