Command line tool for converting between 3D formats

Question

I am looking for a command line tool (i.e. automatable from the command line) for OS X that can convert between various 3D modelling formats, and satisfies the following:

• Supports any of the input formats from the list below (taken from here). However, my preferred input format is 3DS.

• It must support Collada as an output format.

I am already aware of assimp which I can't use due to bugs in its Collada exporter.

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3D Object Geometry Formats

• "PLY" — PLY 3D geometry format (.ply)
• "OFF", "NOFF" — 3D object file formats (.off, .coff, .noff, .cnoff)
• "BYU" — BYU 3D geometry format (.byu)
• "OBJ" — Wavefront OBJ format (.obj)
• "VTK" — Visualization Toolkit 3D format (.vtk)

3D Viewing Formats

• "X3D" — X3D XML geometry format (.x3d)
• "JVX" — JavaView format (.jvx)
• "VRML" — Virtual Reality Modeling Language format (.vrml)
• Modeling & Rendering Formats
• "Maya" — Maya entity files (.ma)
• "POV" — POV-Ray ray-tracing object description format (.pov)
• "LWO" — LightWave 3D file format (.lwo)
• "3DS" — 3D Studio format (.3ds)
• "RIB" — Renderman interchange format (.rib)

CAD-Related Formats

• "DXF" — AutoCAD 2D & 3D formats (.dxf)
• "STL" — stereolithography format (.stl)
• "ZPR" — Z Corp. 3D printer format (.zpr)

Answer 1

I would suggest taking a look at the Blender import and output formats - I am reasonably sure that most of what you are asking for are available. If they are you can run blender from the command line and invoke a python script that will, for example, import a file from one format, export it to your required format & quit.

• Numerous Imports & Exports
• Export formats include Collada Export