transparency disapear by export obj and reimport

[freeland]

If I set the transparency to some value and export this think to obj and reimport the file the transparency disappeared.
Hint:
In the .mtl-file exist for each color a line
Tr ...
with the right value. But this is not the modern way to write it and by import FreeCAD read instead rightly the
d ...
line too. But in false direction, then d is complementary to Tr and by import the d-value FreeCAD use it as Tr-value (instaed of 1-d).
Solution:
In Mod/Arch/importOBJ.py (and also src/Mod/Arch/importOBJ.py)
line 254 and 261 I changed "Tr " to "d "
and recompile. As result import and export by FreeCAD self ar good, but not in conjunction with other programms. So I must change line 261 to
outfile.write("d " + str(1-mat[2]/100) + "\n")
and other programs (i. e. Sweet Home 3D) can import the files in right way, but now FreeCAD not. To correct this I has change line 344 to
trans = int((1-float(mline[2:]))*100)
Than all works fine.

On attention to programs using the Tr line it can export this line too by leave
outfile.write("Tr " + str(mat[2]/100) + "\n")
and add after that
outfile.write("d " + str(1-mat[2]/100) + "\n")

with regards
Andreas Matthus

[onekk]

Hello,

"help us to help you"

please use the code </> tag when posting code.

Code: Select all

a = sin(b)

as example.

If not the post is very difficult to read.

Regards

Carlo D.

[Kunda1]

Someone opened issue #7510