import type { BlockShape, BlockCollisionHint, BlockShapeID, FaceDefinition } from "../BlockShape.ts";
import { FACE } from "../../utils/math.ts";
/**
 * Stair — L-cross-section stair block.
 * Full bottom slab + upper half-block at back (z=0.5..1). High step at PosZ.
 *
 * Occludes: NegY, PosZ.
 * collisionHint: trimesh.
 */
export declare class Stair implements BlockShape {
    readonly id: BlockShapeID;
    readonly collisionHint: BlockCollisionHint;
    constructor(id?: BlockShapeID);
    readonly faces: readonly FaceDefinition[];
    occludes(face: FACE): boolean;
}
/**
 * StairCornerInner — concave inner corner stair.
 * Full bottom slab; upper L-shaped block (3/4 top), missing front-left quadrant.
 * Two inner risers at the step edge.
 *
 * Occludes: NegY, PosZ, PosX.
 * collisionHint: trimesh.
 */
export declare class StairCornerInner implements BlockShape {
    readonly id: BlockShapeID;
    readonly collisionHint: BlockCollisionHint;
    constructor(id?: BlockShapeID);
    readonly faces: readonly FaceDefinition[];
    occludes(face: FACE): boolean;
}
/**
 * StairCornerOuter — convex outer corner stair.
 * Full bottom slab; upper quarter-block only at front-left (x=0..0.5, z=0..0.5).
 * Two inner risers on the right/back sides of the upper block.
 *
 * Occludes: NegY only.
 * collisionHint: trimesh.
 */
export declare class StairCornerOuter implements BlockShape {
    readonly id: BlockShapeID;
    readonly collisionHint: BlockCollisionHint;
    constructor(id?: BlockShapeID);
    readonly faces: readonly FaceDefinition[];
    occludes(face: FACE): boolean;
}
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