getClosestPointIndexOnTriangle
Find a triangle touching the point px, py, pz, then return the vertex closest to the search point
Return
A structure containing the index of the closest point, the squared distance from the queried point to the point that is found, the distance from the queried point to the point that is found, the queried position in local space, the closest position in local space
Parameters
px
The x component of the point to query
py
The y component of the point to query
pz
The z component of the point to query