Find the edge point of a surface

I need information of surface if i use a low poly stl file. There are only triangles in the room and i get the information of the quader around but not the points where the triangel connect to the quaderline.
Thank you for your help.

Here is my whole design. What i need is the projection of the triagle. At the groundplate. If i know the angle of the area and turning angle so that i can cut this element by a hot wire. This gives me the best production information.
Thank you for your help.

Hi @Bombastino,

Sorry for the delay! As this post was missed for some reason.

What you’re describing is possible, but will take longer and would be a bit inconvenience.

I would recommend specific 3D software that specialize in creating 2D layouts out of 3D models, as they will be more accurate and faster for your needs.

At the moment, uMake doesn’t have a ‘Project’ feature, so you would have to position each triangle manually, which is why I mentioned it can be inconvenience.

Sorry for not having an immediate solution. Let me know if that answers your question.