/**
 * The WebGPU lit mesh batcher — meshes shaded by the active stage's
 * {@link Light3d} lights (half-Lambert diffuse from directional lights +
 * ambient), the port of the GL `LitMeshBatcher`:
 *
 * - adds the `aNormal` vertex attribute (48-byte layout vs 36) and the lit
 *   shader family; meshes opt in via `mesh.lit`, so unlit meshes keep the
 *   lean base batcher and pay nothing for lighting
 * - the std140 `Light3dBlock` binds at group 2 with a dynamic offset. The
 *   GL batcher re-packs and dirty-compares per draw
 *   (`UniformBlock.upload`); here a change lands in a FRESH arena region
 *   (queue-write law — an in-place write would retroactively re-light
 *   draws already recorded this frame), and an unchanged rig re-uses the
 *   frame's existing snapshot at zero upload cost
 * @augments WebGPUMeshBatcher
 * @category Rendering
 */
export default class WebGPULitMeshBatcher extends WebGPUMeshBatcher {
    /**
     * @override
     */
    override init(renderer: any, settings: any): void;
    lightsLayout: GPUBindGroupLayout | undefined;
    blockData: Float32Array<ArrayBuffer> | undefined;
    uploadedBlock: Float32Array<ArrayBuffer> | undefined;
    lightBindGroups: Map<any, any> | undefined;
    lightBinding: {
        bindGroup: any;
        dynamicOffset: any;
        frameId: any;
    } | null | undefined;
}
import WebGPUMeshBatcher from "./mesh_batcher.js";
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