Detects if a point is inside a given paralellogram
interieur.para(x, y, xOrigine, yOrigine, xA, yA, xB = NA, yB = NA, shape = "para")
abcisse of the point to test
ordinate of the point to test
abscisse of a summit of the parallelogram (origin)
ordinate of a summit of the parallelogram (origin)
abscisse of a summit of the parallelogram linked to the origine
ordinate of a summit of the parallelogram linked to the origine
abscisse of the other summit of the parallelogram linked to the origine
ordinate of the other summit of the parallelogram linked to the origine
"para"