import { Material, Mesh, Texture, Vector4 } from "three";
import type { Context } from "../engine/engine_setup.js";
export declare class RendererLightmap {
    get lightmap(): Texture | null;
    set lightmap(tex: Texture | null);
    private lightmapIndex;
    private lightmapScaleOffset;
    private context;
    private gameObject;
    private lightmapTexture;
    private lightmapScaleOffsetUniform;
    private lightmapUniform;
    constructor(gameObject: Mesh, context: Context);
    init(lightmapIndex: number, lightmapScaleOffset: Vector4, lightmapTexture: Texture): void;
    updateLightmapUniforms(material: Material): void;
    /**
     * Apply the lightmap to the object. This will clone the material and set the lightmap texture and scale/offset
     */
    applyLightmap(): void;
    private ensureLightmapMaterial;
    private assignLightmapTexture;
    private onBeforeCompile;
    private setLightmapDebugMaterial;
}