import { WebGPUCamera } from './WebGPUCamera';
import { WebGPUMesh } from './WebGPUMesh';
export interface EngineOptions {
    canvas: HTMLCanvasElement;
    debug?: boolean;
}
export declare class WebGPUEngine {
    canvas: HTMLCanvasElement;
    adapter: GPUAdapter | null;
    device: GPUDevice | null;
    context: GPUCanvasContext | null;
    format: GPUTextureFormat;
    camera: WebGPUCamera;
    shadowPipeline: GPURenderPipeline | null;
    shadowTextureView: GPUTextureView | null;
    shadowSampler: GPUSampler | null;
    cameraBuffer: GPUBuffer | null;
    private cameraBindGroup;
    private renderPipeline;
    private depthTexture;
    private depthTextureView;
    lightSpaceMatrix: Float32Array<ArrayBuffer>;
    lightDir: Float32Array<ArrayBuffer>;
    private shadowDepthTexture;
    meshes: WebGPUMesh[];
    clearColor: {
        r: number;
        g: number;
        b: number;
        a: number;
    };
    keys: Record<string, boolean>;
    deltaTime: number;
    private lastFrameTime;
    private debug;
    private fps;
    private lastTime;
    private frames;
    private drawCalls;
    private renderLoopId;
    private isRunning;
    constructor(options: EngineOptions);
    private handleKeyDown;
    private handleKeyUp;
    setDebug(debug: boolean): void;
    getMetrics(): {
        fps: number;
        drawCalls: number;
        totalInstances: number;
    };
    init(): Promise<boolean>;
    private handleUncapturedError;
    private initPipeline;
    handleResize(): void;
    start(): void;
    stop(): void;
    private renderLoop;
    private render;
    compileCustomShader(fragmentShaderSource: string): Promise<{
        success: boolean;
        error?: string;
    }>;
}
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