LagrangeInDOF

Returns the total number of degree of freedom for a lagrange polynomial in cell/face of triangle.

The dof are strictly inside the triangle.

The total number of DOF inside the triangle is given by:

$$\frac{1}{2}(n-1)(n-2)$$

Interface

܀ Interface

INTERFACE
  MODULE PURE FUNCTION LagrangeInDOF_Triangle(order) RESULT(ans)
    INTEGER(I4B), INTENT(IN) :: order
    INTEGER(I4B) :: ans
  END FUNCTION LagrangeInDOF_Triangle
END INTERFACE

️܀ See example

program main
  use easifembase
  implicit none
  integer( i4b ) :: i1, i2
  i1 = LagrangeInDOF_Triangle(order=1)
  i2 = 0
  call IS( i1, i2 )
  i1 = LagrangeInDOF_Triangle(order=2)
  i2 = 0
  call IS( i1, i2 )
  i1 = LagrangeInDOF_Triangle(order=3)
  i2 = 1
  call IS( i1, i2 )
  i1 = LagrangeInDOF_Triangle(order=4)
  i2 = 3
  call IS( i1, i2 )
end program main

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