Convert ac to x3d

What is the difference between .ac and .x3d?

Description: An AC3D file format is a text files that describes a model's geometry. it contains all the details about the model including object data, texture, surface setting, materials, etc.; X3D (Extensible 3D) is a royalty-free open standard file format used to represent 3D computer graphics. It is used to store and interchange 3D model data, including surface geometry, color, animation, and metadata. X3D files are built on the XML standard, and can be viewed and edited with a variety of 3D modeling programs.