face-mesh | A demo app for showing off the iPhone X TrueDepth camera | Camera library

I have a CGAL surface_mesh of triangles with some self-intersecting triangles which I'm trying to remove to create a continuous 2-manifold shell, ultimately for printing.

I've attempted to use remove_self_intersection() and autorefine_and_remove_self_intersections() from this answer. The first only removes a few self-intersections while the second completely removes my mesh.

So, I'm trying my own approach - I'm finding the self-intersections and then attempting to delete them. I've tried using the low level remove_face but the borders are not detectable afterwards so I'm unable to fill the resulting holes. This answer refers to using the higher level Euler remove_face but this method, and make_hole seem to discard my mesh entirely.

Here is an extract (I'm using break to see if I can get at least one triangle removed, and I'm just trying with the first of the pair):

I have a 3D shape (a bone) as a triangular mesh in STL format and I'm working with Python language.

I then have a ray with its origin and direction and I need to know:

• which face of the mesh collides with this ray
• coordinates of intersection point
• the angle between my ray and the normal vector of the collided face

I know 'pycaster' ( https://pyscience.wordpress.com/2014/09/21/ray-casting-with-python-and-vtk-intersecting-linesrays-with-surface-meshes/ ) but it only works with Python 2.x and I need to use Python 3.x.

I know 'trimeshgeom' class ( http://cgkit.sourceforge.net/doc2/_sources/trimeshgeom.txt ) from cgkit but PyCharm can't install it as an interpreter (can't understand why).

Does anybody know how I could do what I'm trying to do?

Thanks, Cheers,

Davide

I have a 3d-plot in MATLAB composed of many 3d-lines (by line([...],[...],[...],...)). If I rotate the plot with mouse and the rotate-tool (clickable icon in figure-window) MATLAB rescales the axis all the time. I know that it is possible to manually adjust the axis limits by using axis([...]), but I dont know the min/max-values of the 3d-lines, or surface objects.

You can test it for yourself by typing surf(peaks). The axis are constantly changing between 0-50 and 0-60. I am using R2011a.

Do you have any suggestions how to get the 3d-min/max values of composed 3d-lines/3d-surface-meshes, to be able to set the axislimits manually?

Thanks