[vtkusers] Re: about drawing line

[Andrew Wilford]

Yes, capture the points as the mouse moves (depending on your OS) and store
them in vtkPoints, then use vtkCellArray to define the edges, from one point
to the next. Create a vtkPolyData and SetPoints and SetLines on the points
and edges. Follow the typical polydata pipeline, using vtkPolyDataMapper2D,
vtkActor2D and finally use AddActor2D to add the polydata to the renderer.

I can provide some code fragments for an implementation in Visual C++ if you
need them.

----- Original Message -----
From: "Yixun Liu" <yxliu at fudan.edu.cn>
To: <andrew at artwork.com>
Sent: Wednesday, July 20, 2005 10:04 AM
Subject: about drawing line


> Hi,
>
> Thank your help!
>
> What I mean is that when I move the mouse around the VTKWindow, a curve
will be drawn. Does 2D actor and mapper support this function?
>
> Regards,
>
> Yixun Liu
>