import * as THREE from 'three';
import { FivePass } from './pass';
import { type Camera } from '../../../core/camera';
type FireworksLine = {
    id?: string;
    points: THREE.Vector3[];
    totalLength: number;
    color: THREE.Color;
    opacity?: number;
    tailLengthRatio?: number;
    duration?: number;
    startTime?: number;
    particleCount?: number;
    emissionRate?: number;
    spread?: number;
    particleSize?: number;
    particleLife?: number;
    gravity?: THREE.Vector3;
    leadRatio?: number;
};
/**
 * FlowingFireworks3DPass
 *
 * 与 FlowingLight3DPass 配套使用：在每条流光线条的「尾部位置」持续喷射出
 * 烟花状向四周发散的粒子。粒子的运动周期、尾部位置计算与 FlowingLight3DPass
 * 完全一致（共用 points / totalLength / duration / startTime / tailLengthRatio），
 * 因此把本 Pass 与 FlowingLight3DPass 配置同样的线条数据即可获得「流光拖尾烟花」效果。
 */
export declare class FlowingFireworks3DPass extends FivePass {
    private camera;
    private points;
    private material;
    private uTime;
    private lines;
    private blocks;
    private geometry;
    private arrPosition;
    private arrVelocity;
    private arrAccel;
    private arrColor;
    private arrBirthTime;
    private arrMaxLife;
    private arrSeed;
    private arrSize;
    private particleScene;
    private orthoCamera;
    private particleRenderTarget;
    private blendMaterial;
    private blendQuad;
    private _tmpTail;
    constructor(camera: Camera);
    /** 批量设置线条（替换现有全部线条） */
    setLines(lines: FireworksLine[]): void;
    /** 追加一条或多条线，返回生成的 id 数组 */
    addLine(...lines: FireworksLine[]): string[];
    /** 按 id 移除一条或多条线，返回实际移除的数量 */
    removeLine(...ids: string[]): number;
    /**
     * 通过 id 修改单条线的参数（部分更新）。
     * 大多数字段（points、color、totalLength、duration 等）会在下一帧发射时即时生效，
     * 无需重建；仅当 particleCount 改变时才会重建粒子缓冲。
     */
    setLine(params: {
        id: string;
    } & Partial<Omit<FireworksLine, 'id'>>): void;
    private _rebuild;
    private _samplePointAtLength;
    private _emitParticle;
    private _emit;
    render(renderer: THREE.WebGLRenderer, writeBuffer: THREE.WebGLRenderTarget, readBuffer: THREE.WebGLRenderTarget, deltaTime: number, _maskActive?: boolean): void;
    dispose(): void;
    private _disposeParticles;
}
export {};