VertexBasis

Returns value of vertex function on triangle.

Interface

܀ Interface

INTERFACE VertexBasis_Quadrangle
  MODULE PURE FUNCTION VertexBasis_Quadrangle1(x, y) &
     & RESULT(ans)
    REAL(DFP), INTENT(IN) :: x(:), y(:)
    !! point of evaluation
    REAL(DFP) :: ans(SIZE(x), 4)
    !! ans(:,v1) basis function of vertex v1 at all points
  END FUNCTION VertexBasis_Quadrangle1
END INTERFACE VertexBasis_Quadrangle

️܀ See example

program main
  use easifembase
  use easifemClasses
  implicit none
  real(dfp), allocatable :: xij(:,:), avec(:)
  integer(i4b) :: ii, jj, cnt, n
  real(dfp), allocatable :: ans(:,:)
  integer(i4b) :: ii, order, pe1, pe2, pe3
  type( VTKPlot_ ) :: aplot
  character(len=*), parameter :: fname="./results/"

  n = 51
  call reallocate(avec, n)
  call reallocate(xij, 2, int((n+1)*(n+2)/2))
  avec= linspace(0.0_DFP, 1.0_DFP, n)
  cnt=0
  do ii = 1, n
    do jj = 1, n-ii+1
      cnt=cnt+1
      xij(1,cnt) = avec(ii)
      xij(2,cnt) = avec(jj)
    end do
  end do

  order=4
  pe1=order; pe2 = order; pe3 = order
  ans = VertexBasis_Triangle(xij=xij, refTriangle="UNIT")

  do ii  = 1, size(ans,2)
    call aplot%scatter3D(x=xij(1,:), y=xij(2, :), z=ans(:,ii), &
      & filename=fname//"PVertex-" // &
      & tostring(ii) //".vtp", &
      & label="P")
  end do

end program main

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