[vtkusers] vtkPlaneWidget

[Jeff Lee]

Did you try
pPlaneWidget->UpdatePlacement() after SetOrigin and SetNormal
-J

James Robinson wrote:

> Dear All,
>
> Thanks to John (Biddiscombe) I am able to control my vtkCutter using 
> the vtkPlaneWidget. However, I also want to be able to do the reverse 
> – i.e. take the vtkPlane setup from the vtkCutter and apply them to 
> the vtkPlaneWidget (as I have already other menu driven controls to 
> manipulate the vtkPlane). My attempt at doing this is:
>
> void CSampleDoc::UpdatePlaneWidget()
>
> {
>
> // This method is to update the plane widget from the vtkPlane used as 
> the
>
> // implicit function for the vtkCutter
>
> vtkFloatingPointType normal[3] ;
>
> vtkFloatingPointType origin[3] ;
>
> pPlane->GetOrigin(origin) ;
>
> pPlane->GetNormal(normal) ;
>
> CString message, dummy ;
>
> message.Format("Origin:- x %lf, y %lf, z 
> %lf\n",origin[0],origin[1],origin[2]) ;
>
> dummy.Format("Normal:- x %lf, y %lf, z 
> %lf\n",normal[0],normal[1],normal[2]) ;
>
> message += dummy ;
>
> AfxMessageBox(message) ;
>
> pPlaneWidget->SetOrigin(origin) ;
>
> pPlaneWidget->SetNormal(normal) ;
>
> pPlaneWidget->GetOrigin(origin) ;
>
> pPlaneWidget->GetNormal(normal) ;
>
> message.Format("Origin:- x %lf, y %lf, z 
> %lf\n",origin[0],origin[1],origin[2]) ;
>
> dummy.Format("Normal:- x %lf, y %lf, z 
> %lf\n",normal[0],normal[1],normal[2]) ;
>
> message += dummy ;
>
> AfxMessageBox(message) ;
>
> }
>
> This yields:
>
> Origin: x 100.000000, y 100.0000000, z 10.0000000
>
> Normal: x 0.000000, y 1.0000000, z 0.0000000
>
> For the vtkPlane – which is what I have set up.
>
> However, the output from the vtkPlaneWidget is:
>
> Origin: x 100.000000, y 10.0000000, z -100.0000000
>
> Normal: x 0.000000, y 1.0000000, z 0.0000000
>
> So the origin coordinates seem to have been mixed up. In addition, it 
> doesn’t show the vtkPLaneWidget in this position (rather the normal is 
> 1,0,0 and the origin (center??) seems alright??
>
> Any advice would be appreciated.
>
> Regards,
>
> Jim
>
> *James C Robinson*, PhD, Chartered Engineer,
>
> + 42 Rivergrove,
>
> Glanmire,
>
> Co. Cork,
>
> Eire
>
> ' +353 21 4822028
>
> +353 87 2393010
>
> 6 +353 21 4822028
>
> - j.robinson at kepler-systems.com
>
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