program shape_half_ring_2d use forcad, only: rk, nurbs_surface implicit none type(nurbs_surface) :: shape !> Set up a half ring shape centered at 0,0,0 with inner radius 1 and outer radius 2. call shape%set_half_ring([0.0_rk, 0.0_rk, 0.0_rk], 1.0_rk, 2.0_rk) !> Export the control points to a VTK file for visualization. call shape%export_Xc('vtk/shape_half_ring_2d_Xc.vtk') !> Create the shape using the specified number of elements in each direction. call shape%create(60, 15) !> Export the geometry to a VTK file for visualization. call shape%export_Xg('vtk/shape_half_ring_2d_Xg.vtk') !----------------------------------------------------------------------------- ! Visualization using PyVista ! Note: PyVista is required for visualization. Install it using `pip install pyvista` !----------------------------------------------------------------------------- !> Show the control geometry and geometry using PyVista call shape%show('vtk/shape_half_ring_2d_Xc.vtk','vtk/shape_half_ring_2d_Xg.vtk') !> Finalize and clean up the shape object. call shape%finalize() end program