The main.m file is a demo
hole.stl Is an ASCII file, and holeb.stl is a binary file
I written two detection modes, which can modify by yourself
The contains function requires version r2016b. A lower version can try to use strfind instead

Each row is a patch information (including vertex and normal vector)
[x1,y1,z1,x2,y2,z2,x3,y3,z3,nx,ny,nz]