Hello guys; I really need some help here.
Please see the attached image
In file one, I have the point cloud, and in file 2, I have the building
The two files share the same coordinate system.
File 2 loaded in file 1 is shown in picture 1, and everything looks fine.
When file 1 is loaded in file 2, using the shared coordinate system, picture 2, as you can see, the geometry goes in the correct position while the point cloud is shifted.
I added spot coordinates in the corner to be sure they are the same, and actually, they are.
Aly clue?
Gelöst! Gehe zur Lösung
Gelöst von robertovalentino. Gehe zur Lösung
What you are saying doesn't make sense or isn't complete. Are you inserting a Point Cloud or are you inserting an RVT containing a Point Cloud into another RVT? If you insert a Point Cloud (e.g. RCP) into an RVT via Shared Coordinates, it only means that the origin of the PC will land on the Survey Point in the RVT.
Dear @barthbradley
Thank you so much for reading and replying to my message.
Fortunately, my non-sense message makes a lot of sense for other users, and I learned this is a well-known Revit bug that Autodesk Technicians helped me to work out.
Thank you again!!!
@robertovalentino wrote:I learned this is a well-known Revit bug that Autodesk Technicians helped me to work out.
What "Bug"? Tell us more and give us the solution please?
It can happen when the origin of the point cloud is very far from the point cloud itself.
@robertovalentino wrote:Fortunately, my non-sense message makes a lot of sense for other users
What other users? I don't see any responding here.
Hi,
Sorry for my late reply and sorry for my poor English. It is not my mother language, and I try my best.
PROBLEM:
Revit File 1 has the point cloud linked using the shared coordinate system.
As a test in the very same file, I modeled a downspout following the point cloud.
Then I loaded Revit file 1 into Revit file 2, using the same shared coordinate system.
In Revit file 2, the downspout landed in the correct position, but the point cloud was strangely shifted.
This is the problem I was trying to describe in my first message.
SOLUTION:
- I detached the point cloud from Revit file 1. saved it.
- I detached Revit file 1 from Revit file 2. Saved it
- Cleaned up my cash folder.
- Reloaded the point cloud in Revit file 1 using the shared coordinate system. Everything is OK; the downspout matches the point cloud.
- Reloaded the Revit file one into Revit file 2 using the shared coordinate system. Everything is OK now.
Conclusions:
It seems like Revit files have some kind of memory of previous attempts at linking files together, and Revit file 2 somehow forced the point cloud into the wrong position, even though it was linked through Revit file 1.
@RobDraw
I posted my question on other channels, and that's how I learned about this "Memory" effect. I was referring to that when I said "other users."
As far as I know, any file in real coordinates, such as point clouds or some DWGs, can cause graphics problems in Revit. It's known that Revit doesn't like things too far from origin. At least, this is what Autodesk told a couple of years ago while trying to figure out why a point cloud suddenly "moved" from its position, even if pinned, causing a mismatching with the model (modeled using the point cloud, by the way).
Since then, unfortunately, we decided to used everything in relative coordinates. This wasnot the best workflow, but it worked. Besides, in other project we tried to used that trick of clean temp files and so on, but doesn't work always.
If any one knows any other way to do it, please, share! And an Autodesk official opinion or solution would be also appreciated.
@IN_GGP wrote:Since then, unfortunately, we decided to used everything in relative coordinates. This wasnot the best workflow, but it worked.
Unfortunately, the shared coordinates workflow is the best and only way to do it without errors, even if you don't like it.
The point is not what I like or don't. It's that this workflow (absolute/real coordinates) fails. And even Autodesk recognized it to us a couple of years ago. I guess it is not solved, because even nowdays, we have problems with point clouds.
It does work. You even said it does. What's the problem now?
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