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TriangleArea3D

TRIANGLEAREA3D computes the area of a triangle in 3D.

Interface​

INTERFACE
  MODULE PURE SUBROUTINE TriangleArea3D(t, area)
    REAL(DFP), INTENT(IN) :: t(3, 3)
    REAL(DFP), INTENT(OUT) :: area
  END SUBROUTINE TriangleArea3D
END INTERFACE
  • This routine uses the fact that the norm of the cross product of two vectors is the area of the parallelogram they form.
  • Therefore, the area of the triangle is half of that value.