鸿蒙地图SDK支持在地图上展示粒子效果，目前支持：雪花、雷雨、雾霾、沙尘、烟花、花瓣多种效果展示及自定义粒子效果。

// 添加雪花粒子效果
this.mapController?.showParticleEffectByType(SysEnum.ParticleEffectType.Snow);

private async createBitmapDescriptor(res: Resource): Promise<image.PixelMap> {
    const context = getContext();
    const uint8 = await context.resourceManager.getMediaContent(res.id);
    const buffer = uint8.buffer.slice(uint8.byteOffset, uint8.byteOffset + uint8.byteLength);
    const imageSource = image.createImageSource(buffer);
    const decodingOptions: image.DecodingOptions = {
        editable: false,
        desiredPixelFormat: 3,
    };
    const pixelMap = await imageSource.createPixelMap(decodingOptions);
    imageSource.release();
    return pixelMap;
}

// 添加自定义粒子效果
const particleOptions = new ParticleOptions();
const position = new LatLng(39.914935, 112.403119);
particleOptions.setParticlePos(position);
const particleImgs: Array<image.PixelMap> = [];
const bullet = await this.createBitmapDescriptor($r('app.media.icon'));
const tail = await this.createBitmapDescriptor($r('app.media.icon'));
particleImgs.push(bullet, tail);
particleOptions.setParticleImgs(particleImgs);
await this.mapController?.customParticleEffectByType(
    SysEnum.ParticleEffectType.Fireworks,
    particleOptions
);

// 关闭粒子效果
this.mapController?.closeParticleEffectByType(SysEnum.ParticleEffectType.Snow);

展示效果如下：