DEFINE USER COORDINATE SYSTEM (UCS)

[Alessandro Pedretti]

Hi everyone,

I'm new in the forum. CC is an amazing software guys!

I'm trying to draw the cross section of a retaining wall scanned using a laser scanner (the one that you can see in the "screen_1" attached).

From the entire points cloud I cut out a smal portion rapresenting the transversal section of the wall that I need to retrace (see the "screen_2" attached).

I just want to reproduce the wall in sketchup pro 2020, are there plugins that can help me?

Right now the only method that i found is to create a polyline using Extract Section command and than import it in sketchup.
The problem is that I need to change coordinate system and makes it perpendicular to the plane containing the section of the wall in order to correctly draw the polyline.

So, is there a way to change coordinate system and makes it paralel to the normal vector of a plane (see the "screen_2" attached).
So that I can draw a polyline on the plane that I have create using Extract Section (in Segmentation tool).

Thank you all.

[daniel]

Indirectly yes: if you right click on the plane (in the DB tree) and choose 'Align camera', you'll see in the Console the 'matrix ' that makes the plane parallel to the screen. You can the copy this matrix and paste it in the 'Edit > Apply transformation' tool (select your cloud first).

This will rotate the cloud so that the plane normal vector is parallel to Z.

[Alessandro Pedretti]

Thank you very much Daniel.

I've also two other question:

1) I need to vectorialize the profile of the section. Drawing a polyline using "trace polyline command" let me build a 3D polyline but I need a 2D polyline
instead. A good tool is the "extract section" but when I right clic with the mouse to move over the cloud point the comand stops tracing and I can't
snap on the previous line.

I find a time consuming "2 steps routine" solution that is to project points on the best fitting plan and than extract a 2D raster image of the point
cloud on which I draw my 2D polyline. Is there a way to do it faster?

I wonder to know if is there an easier way to do it, for example, is it possible to draw a polyline over a plan without snapping to the points of the
cloud? this way would allow me to be faster then before. Is there a short cut to do so? I tried different combinations (such as shift key + pick on the
plan under the points cloud) but it doesn't works.

2) Do you know a good plugin that connect CloudCompare to SketchUp, if is there?

Thank you very much

[Alessandro Pedretti]

The automatic extraction of the profile is not usefull in this case, I need something more accurate.

Thank you

[daniel]

1) You can use the scissors tool: define your 2D polyline then 'save it' (it will save the polyline in the DB tree).

2) Nope

[Alessandro Pedretti]

Thank you very much Daniel