function rayintersect()

the code in the cc-file is not very concise yet, and still contains extra stuff due to experiments and for checks

Function H = rayintersect(A,B,C,L)
          H = rayintersect(A,B,V,F,L)
          [H, iAexcl, iBexcl, iCexcl] = rayintersect(....)

Calculate the intersection point of a ray with a triangle, if there is an intersection.

(c) 2024-2026 fabien van mook

2026.08.20 release of this file within package "fvm-rayintersect" under GNU GPLv3+

function file "rayintersect.cc"