Verify front, back of face sketchup is visible view


#1

I have a app to import sketchup file.
I must get texture(color) of face. But, a face have 2 surface: front and back.
And, how to verify what surface is visible to view ?? (Front or back ??).
Please help me !!! (Sorry for my English).
I use C/C++ Sketchup SDK.
Thanh you very much !!!

This is my sketchup file.
table_4.skp (331.8 KB)


#2

Hi khanhpq, hi folks.

Use Monochrome Face Style.

Regards.

Jean


#3

This is in the SDK category, so I presume you are talking about how to do this in your C/C++ code? If I am correct, then there is no way as the visibility of front vs back is a matter of how the object is oriented in the SketchUp GUI viewer not something that can be determined in the model per se. If, on the other hand, you have a solid in your model and are seeking to assure that all its faces have front surface outward, that can be done. I’m not a SDK programmer so I can’t give you details, but the general idea is to examine which way the normal to each face is oriented relative to the interior of your solid.


#4

In sketchup GUI viewer, use monochrome face style. But, i don’t know get from sdk c++ :frowning:


#5

Thanks, i know, but what function to get it from sdk c++ ? do you know …