Convert B3D to 3DM

The B3D file extension stands for Blitz3D Model, used primarily in the Blitz3D programming language for creating 3D video games. Introduced in 2001 by Blitz Research Ltd., Blitz3D extended the capabilities of its predecessor, BlitzBasic, by incorporating a DirectX 7-based 3D engine. B3D files store 3D model data, including textures, vertices, meshes, bones, and animation information, in a chunk-based format. These files are essential for defining in-game characters, terrains, buildings, and other objects, making them a crucial component in game development. Blitz3D's ease of use and flexibility have made it a popular choice among game developers, despite being considered somewhat outdated compared to modern 3D engines.

The 3DM file extension, standing for "3D Model", is associated with the openNURBS initiative, which facilitates the exchange of 3D geometry across CAD, CAM, CAE, and computer graphics software. Developed by Robert McNeel & Associates, it serves as the native format for Rhinoceros (Rhino) software. Introduced to address interoperability challenges, 3DM files store precise 3D models using NURBS (Non-Uniform Rational B-Splines) and polygon mesh representations. This format is widely adopted due to its open-source nature, enabling developers to read and write 3DM files without proprietary restrictions, thus promoting seamless data sharing in 3D modeling workflows.