Local or global coordinate system and referencing external drawings + Extract geometry from block

[augustin.ceillier]

Hi all,
I would like to have other users opinions and feedback + some advice about what is the best way to do:
i work in infrastructure projects with large work areas. All the structures are drawn or modeled in global coordinate system ( 25495000,6670700,0 in m for example, 0,0005m precision). We have a lot of dwg drawings to reference in our models so the easiest would be to use worksessions and work in global. However, many programs and plugins don´t support being far away from origin (Mapping textures is buggy, Gh used to be shaky as well + many more…)

1. Is it still advised to work in local even with rhino6?
2. What is the best way to handle references in global or in local (no possible offset of references with worksessions and the import command creates a lot a “blocked” layers that can´t be grouped) or to offset them?

Any pluggin to take care of that?

Thanks for sharing!!

[pascal (Pascal Golay)]

Hello - this might help -

https://wiki.mcneel.com/rhino/farfromorigin

-Pascal

[augustin.ceillier]

Hi,

Thanks for your answer! This is a useful article but not really applicable to my case: The references I am using are updated constantly (for example from other disciplines) so i need to keep an active link with my references.

It seems that the best way is to use a Linked Block with an offset but that leads to the issue of being able to select and copy objects from a block (ie Extract geometry from a block)

I saw that @pascal you wrote a scrip a while ago to paste geometry from a block, do you know if it became a part of Rhino 6 or do i still need to run a specific script to do that?

[pascal (Pascal Golay)]

Hello - You’ll need the script. Hm… I do not remember the script, though. What is it called?

-Pascal

[augustin.ceillier]

Here is the post where your script was mentioned:

Extract geometry from the Block that linked to file

Hi Katsu - here’s a quick script that may help- PasteLinkedBlockElements.zip (582 Bytes) To use the script, extract and save the .rvb file from the attached zip archive, then drag and drop the saved rvb over an open Rhino V4 or v5 window. This will load the script, set it up to load on startup in the future and register the alias PasteLinkedBlockElements that will run the script much like a regular command. An alias can be typed or added to a toolbar button or keyboard shortcut (F-key). -Se…

And if somebody else is interested, here is another script that was posted there too:

Simpler way to extract block entities!?

Hi |ruisantosfortes, I’ve attached a zip file with 3 rhinoscripts. DirectObjectsBlockAccess.zip Unzip it to a folder where you can keep them and drag&drop each file over Rhino. It will register an alias that will run the script. ExtractObjectsFromBlock.rvb: copy-extract objects from a block. AddObjectsToBlock.rvb : add object to the selected block DeleteObjectsFromBlock.rvb : delete/remove objects from a block Note that these scripts are presented “as is”, make sure to if needed double…

That would be a good feature to add in Rhino 7 (Especially because this can be done with worksessions, but no offsets are allowed with worksessions…)

[Bogdan_Chipara]

This is a recurring problem. Working in global makes file management easy, since all external drawings are linked in the same place. I usually try to work in global but I do bump into bugs from time to time in R6 - tolerance related issues.

I wish that the Cplane position would change the coordinate system, like in Revit. Project coordinates = Cplane, Global coordinates = World. This way if the Cplane is closer to the geometry the coordinates won’t have 1 million digits. @pascal, what do you think about this?