[vtkusers] vtkPlaneWidget

[James Robinson]

Jeff,

Many thanks. However, it doesn't seem to do anything (positive).

I have put:
    pPlaneWidget->SetOrigin(origin) ;
    pPlaneWidget->UpdatePlacement() ;
    pPlaneWidget->SetNormal(normal) ;

Into my code and now I get:

Origin: x 95.249390, y 0.000002, z 105.012161
Normal: x 0.000000, y 1.0000000, z 0.0000000

The significance of the coordinates of the new origin I cannot see? In
addition, if I change the order to:

    pPlaneWidget->SetOrigin(origin) ;
    pPlaneWidget->SetNormal(normal) ;
    pPlaneWidget->UpdatePlacement() ;

I get a slightly different output (still not correct).


Finally, regardless of these new (seemingly arbitrary values for the origin)
it changes nothing in the window in terms of the actual widget placement.

Any more advice welcomed.


Jim


James C Robinson, PhD, Chartered Engineer,
CEO,
Kepler Engineering Software Ltd.,
+     42 Rivergrove,
         Glanmire,
         Co. Cork,
         Eire
'     +353 21 4822028
         +353 87 2393010
6      +353 21 4822028
-    j.robinson at kepler-systems.com 

-----Original Message-----
From: Jeff Lee [mailto:jeff at cdnorthamerica.com] 
Sent: 05 August 2004 16:20
To: j.robinson at kepler-systems.com
Cc: Vtk Users
Subject: Re: [vtkusers] vtkPlaneWidget

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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>
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