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QuadArea3D

This function returns the area of quadrangle in three dimension.

Interface​

INTERFACE
  MODULE PURE SUBROUTINE QuadArea3D(q, area)
    REAL(DFP), INTENT(IN) :: q(3, 4)
    REAL(DFP), INTENT(OUT) :: area
  END SUBROUTINE QuadArea3D
END INTERFACE
  • QUADAREA3D computes the area of a quadrilateral in 3D.
  • A quadrilateral is a polygon defined by 4 vertices. It is assumed that the four vertices of the quadrilateral are coplanar.
  • This algorithm computes the area of the related Varignon parallelogram first.