上篇文章我们知道了什么叫gltf,不知道的可以去看一看
这篇文章来了解一下什么是b3dm。
首先,b3dm是一个缩写,它的全称是:Batched 3D Mode(批量化3d模型),顾名思义,批量化指的是一定有很多个,不止一个。
Batched 3D Model allows offline batching of heterogeneous 3D models, such as different buildings in a city, for efficient streaming to a web client for rendering and interaction. Efficiency comes from transferring multiple models in a single request and rendering them in the least number of WebGL draw calls necessary. Using the core 3D Tiles spec language, each model is a feature.
Per-model properties, such as IDs, enable individual models to be identified and updated at runtime, e.g., show/hide, highlight color, etc. Properties m

b3dm是一种批量化3D模型格式,用于高效流式传输和渲染城市等场景的多个异构模型。它基于3D Tiles规范,每个模型作为一个feature,包含可识别和更新的属性,如ID。b3dm数据由header和body组成,包含feature table和batch table,分别存储模型语义信息和样式属性。在实际应用中,通常需要将osgb或obj格式的倾斜摄影模型转换为b3dm以进行进一步操作。
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