Mac OS X QuickLook supports the Collada interchange format with .dae
file extension out of the box.
There is CaniVIZ 3D Preview available for 59$ and there are free standalone viewers for CAD/3D files like eDrawings Viewer. There’s even a plug-in for .stl
files popular in 3D printing.
Is there a free or cheap (< 5 USD) QuickLook plug-in, maybe part of a viewer application, that is capable of formats like .dxf
/.dwg
, .3ds
/.max
, .obj
, .skp
/.kmz
?
How hard would it be to write or adapt an existing one? SketchUp/3D Warehouse .kmz
files, for instance, are .zip
archives that contain a .dae
file among other stuff. Also, there’s a FOSS project, Meshlab, that should contain the required parsing code for a lot of formats.