import type { Vector3 } from '@holoscript/core';
/**
 * TerrainTexturing.ts
 *
 * Splatmap blending: multi-layer texturing, triplanar mapping,
 * detail layers, and texture weights.
 *
 * @module terrain
 */
export interface TerrainLayer {
    id: string;
    textureId: string;
    normalMapId?: string;
    tiling: {
        x: number;
        y: number;
    };
    metallic: number;
    roughness: number;
    heightBlend: boolean;
}
export interface SplatmapData {
    width: number;
    height: number;
    channels: Float32Array[];
}
export interface TriplanarConfig {
    sharpness: number;
    tiling: number;
    enabled: boolean;
}
export declare class TerrainTexturing {
    private layers;
    private splatmap;
    private triplanar;
    private detailLayers;
    addLayer(layer: TerrainLayer): void;
    getLayer(index: number): TerrainLayer | undefined;
    getLayerCount(): number;
    removeLayer(id: string): void;
    createSplatmap(width: number, height: number, channelCount?: number): SplatmapData;
    paintSplatmap(channel: number, x: number, z: number, radius: number, strength: number, _heightMap?: Float32Array): void;
    private normalizeSplatAt;
    getSplatWeights(x: number, z: number): number[];
    setTriplanar(config: Partial<TriplanarConfig>): void;
    getTriplanar(): TriplanarConfig;
    computeTriplanarWeights(normal: Vector3): Vector3;
    addDetailLayer(layerIndex: number, distance: number, tiling: number): void;
    getDetailLayers(): typeof this.detailLayers;
}
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