Face Tilt and orientation

[MaryamR]

i'am new to Sketchup C/C++ SDK. I am creating a C/C++ program which gives me the geometry of a house model in Sketchup.I want to get the orientation of all the faces in the model and their Tilt. When I say the word 'Orientation' I mean to get the direction of every face relative to the N direction using the Axes in Sketchup and when i say Tilt i mean the degree of each face' tilt in the grey roof in this example.

Can anyone come up with a solution or a method to do that?

Thanks in advance

[thomthom]

Using SUFaceGetNormal you get the face orientation in relationship to its parent entities container.
Not sure what you mean by "N direction" though..?

[MaryamR]

i didn't quite understand how can i do get the orientation,as it's my first time using Sketchup C/C++ SDK.

i meant by "N direction" an axe, for example find faces orientation using one axe red one for example as reference, because i need the degree of orientation.

do u have an example of how to find the orientation ?

[thomthom]

As you traverse the entities and you have a SUFaceRef:

// Assuming `face` is a SUFaceRef.
SUVector3D vector = { 0.0, 0.0, 0.0 }
SUFaceGetNormal(face, &vector);

You can then inspect the X, Y and Z values of the vector to see if it's facing the direction you are looking for.

[MaryamR]

What i'm looking for is the degree of the angle between the face (wall for example) and the red axe and have that angle degree for each face,for example face 1 20°, face 2 80° ...