How do I find orientation of a wall

[harikumar001]

Hey guys,

Have a good day.

My programs draws walls in 3D from 2d lines that the user draws. I use AddWall3D for the same.

The user can draw multiple walls to create a room. I need to know which side of the wall is the interior and which the exterior. From what I understand, I have to get the normals of the wall faces, but i am unable to identify which face represents the interior.

Any pointers would be greatly appreciated.

Regards

[Mithrandir]

Create a point along the normal and check whether this point is inside a polygon described by the lines/walls.

You can google out plenty of materials about how to check whether a point is inside a polygon. Or as the wise man said: Google the question.

[harikumar001]

Thanks mithrandir