libigl

libigl is the mesh processing library of the Interactive Geometry Lab from ETH Zürich.

Its design principle are

• header-only
• the use of Eigen matrices to store everything, no complex data types
• minimal dependencies
• each function has a dedicated .h/.cpp pair of the same name

Mesh representation

to complete their documentation.

V : vertices

A nb_vertices by 3 matrix of double. Each row i represent a vertex with its $x$, $y$ and $z$ coordinates. i $\in$ [0,nb_vertices-1]

F : faces (triangles)

A nb_faces by 3 matrix of int. Each row i represent a face, with the vertices index at the 3 corners $\in {0,1,2}$. i $\in$ [0,nb_faces-1] ; {F(i,0),F(i,1),F(i,2)} $\in$ [0,nb_vertices-1]. ⚠️ the vertex order determines the orientation (right-hand rule).