[vtkusers] Triangulating 'vertical' polygon with Delaunay2D?

[David Gobbi]

Hi Artem,

You can try using vtkContourTriangulator, it only uses the connected points
for the triangulation and it works in any orientation:
http://www.vtk.org/doc/nightly/html/classvtkContourTriangulator.html#details

Delaunay2D also has a method for working in planes other than the XY plane:
calling the method SetProjectionPlaneMode(VTK_BEST_FITTING_PLANE) should
work, if all of your input points are in the same plane.

 - David

On Mon, May 11, 2015 at 4:47 AM, Artem Babayan <
artem.paraview at googlemail.com> wrote:

> Hello,
>
> I have
>
> 1) vtk_poijnts -- set of 3D points (vtkPoints object) located within the
> computational 3D box.
> 2) poly_1 -- std::vector<int> -- connected subset of points from 1)
> representing non-convex polygon on the side of computational box. E.g. in
> XZ plane.
> 3) poly_hole_1, poly_hole_2 -- 2 subsets of points from 1) each
> representing possibly non-convex hole in poly_1 from 2).
>
> How am I visualise it with VTK?
>
> I assume that as I have holes in polygon the only choice of I have is to
> use vtkDelaunay2D?
>
> vtkDelaunay2D apparently uses all points from vtk_points for
> triangulization, while I need only points from poly_1, poly_hole_1 and
> poly_hole_2 ?
>
> I need to tell somehow vtkDelaunay2D than I want to tesselate in XZ plane
> rather than in XY plane?
>
> Thank you
> Artem
>
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