mod_cg2_points Module Reference

Functions/Subroutines
logical pure function	cg2_are_counterclockwise (p0, p1, p2)
	Return .true. if the points {p0, p1, p2} are defined in counterclockwise order.
logical pure function	cg2_is_point_left_of_line (l0, l1, p)
	Return .true. if point p is on the left side of the line (l0, l1)
logical pure function	cg2_is_point_left_of_or_on_line (l0, l1, p)
	Return .true. if point p is on the left side of the line (l0,l1) or on the line.
logical pure function	cg2_are_points_collinear (p0, p1, p2)
	Return .true. if the points p0, p1 and p2 are collinear.
logical pure function	cg2_is_point_on_segment (s0, s1, p)
	Return .true. if the point p is on the line segment [s0, s1].
double precision pure function	cg2_perp_product (p0, p1)
	Return the 2D cross product of two points.
double precision pure function	cg2_triangle_double_area (p0, p1, p2)
	Return twice the signed area of the triangle {p0, p1, p2}.