Skip to main content

QuadArea2D

This function returns area of quadrangle in two-dimension.

Interface​

INTERFACE
  MODULE PURE SUBROUTINE QuadArea2D(q, area)
    REAL(DFP), INTENT(IN) :: q(2, 4)
    REAL(DFP), INTENT(OUT) :: area
  END SUBROUTINE QuadArea2D
END INTERFACE
  • QUADAREA2D computes the area of a quadrilateral in 2D.
  • A quadrilateral is a polygon defined by 4 vertices. This algorithm should be able to handle nonconvex quadrilaterals. The vertices of the quadrilateral should be listed in counter clockwise order, so that the area is positive.