Python create 3dm file and save/export objects in them

[cotoc_george]

hello there, I want to make some kind of a database, but with rhino files. So,for example, in the current Rhino file I create 2 objects. When this custom command is executed, it should select the 2 objects, loop thru them, and then save them, or export them, INDIVIDUALY in a .3dm file, at the path that I want. Eventually, I’m thinking to save the .3dm file with the object GUID for a better control. I have all the puzzle’s parts in my mind, but only the export part is unknown.

So, in conclusion, I need the python command which exports objects, and the way to create the empty 3dm file

[cotoc_george]

found the solution
check link https://stackoverflow.com/questions/29401951/export-layers-as-obj-from-rhino3d

[diff-arch]

Hi @cotoc_george,

You can also take a look at my code here for a rather fast Python OBJ export:

How to optimise GHPython OBJ export?

Hi everybody, Since the DLL workflow still doesn’t work on macOS, I came up with another Pythonic approach today. It uses the Rhino _Export command. Basically, a temporary, new layer is created in Rhino. The desired meshes are baked to that layer, and exported to an OBJ file. After that, the temporary layer and meshes get deleted, since they aren’t needed anymore. In my most recent test, I was able to export a Mesh with 165K vertices and 160K faces in 4.07 seconds, which isn’t bad at all perf…

It’s meant for Grasshopper to export sequences of OBJs for animation purposes - basically like you would export rendered frames for a video -, but it should also work for single OBJ export in Rhino. It probably only needs some minor modifications.

[cotoc_george]

in the end, the code looks like this:.

import rhinoscriptsyntax as rs
import os
def dbmaker():
strPath = rs.DocumentPath()
objects=rs.GetObjects()
if objects:
for object in objects:
objGuid=str(rs.coerceguid(object))
objExtension=’.3dm’
expCommand=’-_Export “{}{}”’.format(os.path.join(strPath,objGuid),objExtension)
rs.EnableRedraw(False)
print (‘expcommand’,expCommand)
rs.UnselectAllObjects()
rs.SelectObjects(object)
rs.Command(expCommand+’ _Enter’)

dbmaker()