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Print at Jan 21, 2026, 2:33:11 AM

Posted by Xlance at Apr 26, 2025, 11:08:35 AM

Export CAD to SH3D
Hello smile

A two step method to convert lines from Autocad to walls & polylines in Sweethome3d

1. Run"cad2walls.lsp" in Autocad > will generate "cad2walls.Input.txt"

Put "cad2walls.Input.txt" in same folder as "cad2walls.jar"

2. Run "cad2walls.jar" > will generate "cad2walls.Output.sh3d"

cad2walls.lsp
+ Added a a new function to create a Layer tag at the end of each line.
+ Curves are supported ( Arcs, Circles, Ellipses, and Splines ).
+ Simplified the process of Exporting points.
+ All lines are now saved as not joined and will be recognized as such in SH3D, this will prevent the effect of cross-linking.

cad2walls.jar
+ Added a function to modify Scale before import into SH3D.
+ Added multi level error handling.
+ Added a new function to import coordinates as POLYLINES.
+ Added a new function to import BOTH, Polylines and Walls based on Layer tags.

Notes:
1. Supported Layer tags are "Walls" and "Poly" only.

2. Removing a Layer tag completely, skips reading of item either a wall or a polyline !

3. Added an Experimental option in cad2walls.lsp to mark lines which should be recognized as joined in SH3D.
Lines are marked with a letter "j" at the beginning of each line.
Then cad2walls.jar identifies the 'j' tag and add additional code to join them.

However because the Autolisp script and SH3D read points in a different order, joined lines in output, sometimes do not match with marked lines by the script !

For best results join Outer border lines only :-)

https://sourceforge.net/p/sweethome3d/plug-ins/56/

Cheers
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Windows 64bit | Intel i7 | 8GB Ram | SH3D 7.5 + Plugins

Posted by MarioDLCO at Jun 23, 2025, 5:24:55 PM

Re: Export CAD to SH3D
Hi, Xlance.

Q : For best results join Outer border lines only :-)...
means to create polyline?

Could you send me the code?

Don´t run in my SweetHome 7.5

Thank's.
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Every Day is for Learn...

Posted by Xlance at Sep 5, 2025, 5:42:40 PM

Re: Export CAD to SH3D
For best results join Outer border lines only, means that it's best to export all walls without using 'join' option in the Autocad .lsp (option is still there but I use it for outer walls to get a closed shape)

This plugin is aimed mainly for Architects / Engineers who wish to integrate Autocad with Sweethome3D, as many expressed their interest for such a bridge :-)
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Windows 64bit | Intel i7 | 8GB Ram | SH3D 7.5 + Plugins

Posted by badbadhome at Sep 9, 2025, 7:34:23 PM

Re: Export CAD to SH3D
I can't convert the cad2walls.Input.txt file to SH3D.
I updated Sweet Home 3D to the latest version. Same with Java.
I run the script with this: "C:\Program Files (x86)\Java\latest\jre-1.8\bin\java.exe" -jar cad2walls.jar
No luck.

I tried a txt file from my own CAD and with example downloaded from sourceforge, but it just doesn't work.

Error: Can't open home cad2walls.Output.sh3d

Posted by Xlance at Sep 12, 2025, 4:38:25 AM

Re: Export CAD to SH3D
Hello

-> Put both ( cad2walls.jar) and (cad2walls.Input.txt ) in the same folder
-> Click (cad2walls.jar) do not > java.exe" -jar cad2walls.jar
-> Choose an option
-> (cad2walls.Output.sh3d) wil be Auto generated

Steps have been tested many times and should work :-)

Cheers
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Windows 64bit | Intel i7 | 8GB Ram | SH3D 7.5 + Plugins

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Jan 21, 2026, 2:33:11 AM