main/src/georegression/metric/Intersection2D_F64.java
public static boolean contains( Quadrilateral_F64 quad , Point2D_F64 pt ) {
		return containTriangle(quad.a, quad.b, quad.d, pt) ||
				containTriangle(quad.b, quad.c, quad.d, pt);

	}
public static boolean contains( Quadrilateral_F64 quad , Point2D_F64 pt ) {
		return containTriangle(quad.a, quad.b, quad.d, pt) ||
				containTriangle(quad.b, quad.c, quad.d, pt);

	}
True if the point is contained inside the quadrilateral.

@param quad quadrilateral
@param pt point
@return true if the point is inside and false if it is not.