Need to unfold / unroll 3D facade in 2D drawing

[mateP]

Hi all,

 

I need a help from CAD experts because I am stuggling with a 3D drawing.

 

I got dwg file with 3D measurements of facade from surveyor (upper line, bottom line and 50-60 windows measured in all four corners) but to proceed with work I need 2D drawing of facade.

It is easy to get 2D drawing when facade is straight but building is half straight and half curved. When you look from top, building is shaped as letter "J".

 

If I use reference line and side view, facade will be shorter then it accually is becase of ortogonal projection. 

 

Is there a soultion in AutoCAD Civil, Inventor or another program where I can unroll facade so that I get right dmensions between windows?

 

I hope somebody can help me

 

 

[CyberAngel]

Welcome to the CADTutor forum!

 

I assume you need the distance along the face of the building, since it's trivial to find the 2D distance.

 

If I had this problem, I'd use a Civil 3D profile, because you can run it along a curved alignment. You can then plot each window corner by station and elevation. If you're not familiar with Civil 3D, though, there's a pretty steep learning curve.

 

With Revit, you can create a curved wall, and you can place windows as objects, not as collections of simpler objects. Revit will also give you a bill of materials, if that's what you're looking for. Again, steep learning curve.

[scj]

Can you upload a small sample file?

Regards

Jochen

www.black-cad.de

[BIGAL]

I did some coding for 3d walls and produce a flat plan of that wall. This would be like you window problem you need to set you UCS to each window face and produce a front on plan then for overall plan rotate all of them to a world UCS. Around 20+ points per wall and include offset from true vertical. It was very tricky. But in your case may be easy as only 4 points.

 

 

Need a dwg

Edited March 29, 2022 by BIGAL

[mateP]

On 3/28/2022 at 3:57 PM, scj said:

Can you upload a small sample file?

Regards

Jochen

www.black-cad.de

Here are two sample files.

Windows_lines_measured.dwg: measured lines and spline closing curved part. 

Facade_teoretical with measured lines: I have overlaped measured and teoretical facade.

 

If I can get teoretical facade (white part in dwg) unrolled it will solve all my problems

 

On 3/28/2022 at 2:44 PM, CyberAngel said:

Welcome to the CADTutor forum!

 

I assume you need the distance along the face of the building, since it's trivial to find the 2D distance.

 

If I had this problem, I'd use a Civil 3D profile, because you can run it along a curved alignment. You can then plot each window corner by station and elevation. If you're not familiar with Civil 3D, though, there's a pretty steep learning curve.

 

With Revit, you can create a curved wall, and you can place windows as objects, not as collections of simpler objects. Revit will also give you a bill of materials, if that's what you're looking for. Again, steep learning curve.

 

Right, I need distance along the face of building, precise distance between windows frames (blue lines in dwg)

 

Regards,

MateP

 

965324441_Facade_teoreticalwithmeasuredlines.dwg Windows_lines_measured.dwg

[BIGAL]

You have drawn the vertical lines from say a xyz file so  it would make sense start there. You should have 4 points to make a window.

 

Can you post the xyz file ? 

 

[lrm]

Create an arc that approximates the curved wall then dimension its arc length to get a very good approximation of the wall's length. You can do something similar to determine window placement once you know the radius of the wall

distance = radius * angle (radians).

[BIGAL]

Still need the data file, CIV3D has a curve fit function so that will do the best approximation of the curve.

[scj]

Don't know If I got your problem correctly. See my suggestion attached.

You can simplify the result by redrawing as there are only straight Lines and Rectangles.

Regards

Jochen

www.black-cad.de

www.ant-ares.de

fassade1-0.dwg

[mateP]

Hello

 

Sorry for the late reply. It was on hold. 

With your suggestions I have managed to solve a problem. I used approximation of a curve and redraw arc lenghts to straight lines. 

 

@scj, I have overlapped your drawing with mine and it seems like it is the same (within 1cm difference).

Many thanks for your help.

 

Best regards,

Mate