[vtkusers] Get "vertex color array" from vtkPolyData

[Cory Quammen]

`vtkUnsignedCharArray* vtkMapper::GetColorMapColors()` looks like it
also gets you the vertex colors, though I haven't used it myself.

- Cory

On Fri, Apr 21, 2017 at 2:33 PM, alanwsx <wushx6 at gmail.com> wrote:
> Hey, I found the solution. You can read by PCL::IO::ReadPLY and then convert
> it to VTK style.
>
> It is really weird why they don't have this function itself in VTK.
>
>
>
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-- 
Cory Quammen
Staff R&D Engineer
Kitware, Inc.