import type { Vector3 } from '@holoscript/core';
/**
 * DecalBatcher.ts
 *
 * Instanced decal rendering: GPU batching, per-texture
 * grouping, LOD selection, frustum culling, and draw stats.
 *
 * @module rendering
 */
export interface DecalInstance {
    id: string;
    textureId: string;
    position: [number, number, number];
    scale: Vector3;
    rotation: {
        x: number;
        y: number;
        z: number;
        w: number;
    };
    opacity: number;
    lodLevel: number;
}
export interface DrawBatch {
    textureId: string;
    instances: DecalInstance[];
    instanceCount: number;
}
export interface BatchStats {
    totalInstances: number;
    totalBatches: number;
    culledCount: number;
    drawnCount: number;
}
export declare class DecalBatcher {
    private instances;
    private batches;
    private stats;
    private maxLOD;
    private lodDistances;
    setLODDistances(distances: number[]): void;
    getLODDistances(): number[];
    addInstance(instance: DecalInstance): void;
    removeInstance(id: string): boolean;
    clear(): void;
    getInstanceCount(): number;
    computeLOD(distance: number): number;
    buildBatches(cameraPos: Vector3, frustumTest?: (pos: DecalInstance['position']) => boolean): DrawBatch[];
    getStats(): BatchStats;
}
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