import { FACE } from "../../utils/math.ts";
import type { BlockShape, BlockCollisionHint, BlockShapeID, FaceDefinition } from "../BlockShape.ts";
export type SlabType = "top" | "bottom";
/**
 * Half-height slab block.
 * "bottom" slab occupies y=[0, 0.5]; "top" slab occupies y=[0.5, 1].
 *
 * Occlusion: the full face (top or bottom, depending on type) is solid so
 * the adjacent block's opposite face can be culled. The half-height sides
 * do NOT occlude their neighbours — a neighbour must always emit its own face.
 */
export declare class Slab implements BlockShape {
    #private;
    readonly id: BlockShapeID;
    readonly collisionHint: BlockCollisionHint;
    readonly faces: readonly FaceDefinition[];
    constructor(type?: SlabType, id?: BlockShapeID);
    occludes(face: FACE): boolean;
}
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