PostGIS
2.5.7devr@@SVN_REVISION@@

int edge_point_on_plane  (  const GEOGRAPHIC_EDGE *  e, 
const GEOGRAPHIC_POINT *  p  
) 
Returns true if the point p is on the great circle plane.
Forms the scalar triple product of A,B,p and if the volume of the resulting parallelepiped is near zero the point p is on the great circle plane.
Definition at line 775 of file lwgeodetic.c.
References edge_point_side(), LW_FALSE, and LW_TRUE.
Referenced by edge_contains_point().