Coordinate Systems

[Kerrie Holton Tainter]

Actually,

I think PolyDataMapper2D projects all the z planes into one "overlay" plane on
the viewport.  anyway, f you want to ignore the y-coordinate of the polydata,
you could
just apply a rotation transform before you map to the overlay plane.

vtkCoordinate seems to describe a location in space, and is useful for changing
from
one coordinate system (ie. world coords to display coords).  I don't think it's
useful
for making the y-axis correspond to z.

Ana Cugat wrote:

> Hello everybody,
>
> I'd like to know how to pass the polydata of the 3D renderer to the 2D
> viewport. vtkPolyDataMapper2D gets the x, y coordinate of the 3D polydata
> surface to display the image in the viewport. A vtkCoordinate object can be
> used to transform the data in other ways, but I don't quite understand how
> to use it. What should I do if, for instance, I wanted to ignore the
> y-coordinate?
>
> Thanks,
>
> Ana



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