import { GeometryData } from './geometry';
import { ShaderProgram3D } from '../shader/programs';

export interface InstanceData {
    positions: Float32Array;
    scales: Float32Array;
    colors: Float32Array;
}
export interface InstancedMeshOptions {
    geometry: GeometryData;
    maxInstances?: number;
}
export declare class InstancedMesh {
    private gl;
    private vao;
    private positionBuffer;
    private indexBuffer;
    private instancePosBuffer;
    private instanceScaleBuffer;
    private instanceColorBuffer;
    private geometry;
    private maxInstances;
    private instanceCount;
    constructor(gl: WebGL2RenderingContext, options: InstancedMeshOptions);
    private initBuffers;
    /**
     * Update instance data. Call before render.
     */
    updateInstances(data: InstanceData): void;
    /**
     * Render all instances with given shader program.
     */
    render(program: ShaderProgram3D): void;
    /**
     * Get current instance count.
     */
    getInstanceCount(): number;
    /**
     * Clean up WebGL resources.
     */
    destroy(): void;
}