Select similiar geometries / select copys / select identical parts?

Rhino Rhino for Mac
1

Hello
In order to count identical parts in a very large construction (e.g. identical screws, nuts, etc.) I am looking for a command to select all identical objects.
I don’t mean the ‘select Duplicates’ command that only selects parts that overlap.
I want to select all visible parts that have been created by the Copy command and which are now in different positions.
In this case it is not possible to filter by name, colour, layer etc…
All the parts of the construction are closed surface groups, are in different positions, are all on the same layer, all have the same colour, all have no specific name.
To be on the safe side, I created a box as a test and copied it several times side by side. But the command ‘_SelVolumeObject which compares the volume does not produce a result.
So it must be purely about the same geometries that need to be compared here.

According to my idea, the Command process would be
Manual selection of an object → Command: ‘Select all geometrically identical objects’.
I would then be able to see how many identical objects were selected in the info line.

But I can’t find anything about this.
Have I overlooked something?

2

Hi -

For identical objects that are used several times in a scene, you’d typically use blocks and use SelBlockInstanceNamed to selected all instances of a given definition. When you are not using blocks, you could name an object and copy that object around. The SelName command will then find all copies.

Both of these workflows need to be defined before placing copies. There are several scripts around on this forum that try to find duplicates based on varying criteria.

The SelVolumeObject doesn’t compare volumes of different objects. It selects everything within the volume of the selected object.
-wim

3

Hello Wim,
thanks for your help.

Both of these workflows need to be defined before placing copies.

Thats the point. No names and no Blocks were defined.

There are several scripts around on this forum that try to find duplicates based on varying criteria.

Are there criteria that could work for my case?
Do you know what could be so difficult for Rhino to compare geometric parts?