I have a complex structure of which I want to calculate the volume. I tried using the convex hull method, but this does not give me the smallest possible volume as it only takes into account the points, not the lines of the structure. Because of this the volume is always bigger than what it would be in reality.

I am trying to find a way to create a mesh (or something similar) consisting of the points and the lines so that the volume can be calculated in an accurate manner. What would be a good way of doing this?