[Paraview] Incorporating ImplicitPlane widget into ServerManagerXML

[Alex Rattner]

Hi Burlen,

Thank you for sharing the code. I will check it out soon.

-Alex

On 08/02/2012 10:16 AM, Burlen Loring wrote:
>> In particular, I want a way to get the Camera Normal.
> You could get the camera normal inside a custom panel on the client 
> side and communicate it to your filter on the server side via the 
> usual sm mechanisms. I have written a custom panel for an improved 
> plane source in which I wanted to set the camera to look down the 
> normal of a plane. Toward the end of that function is some code that 
> sets the camera up based on the plane normal. Hope this will give you 
> some ideas.
>
> //----------------------------------------------------------------------------- 
>
> void pqSQPlaneSource::SnapViewToNormal()
> {
>   #if defined pqSQPlaneSourceDEBUG
>   cerr << ":::::pqSQPlaneSource::SnapViewToNormal" << endl;
>   #endif
>
>   double o[3];
>   this->GetOrigin(o);
>
>   double p1[3];
>   this->GetPoint1(p1);
>
>   double p2[3];
>   this->GetPoint2(p2);
>
>   // compute the plane's center, this will become the camera focal point.
>   double a[3];
>   a[0]=o[0]+0.5*(p1[0]-o[0]);
>   a[1]=o[1]+0.5*(p1[1]-o[1]);
>   a[2]=o[2]+0.5*(p1[2]-o[2]);
>
>   double b[3];
>   b[0]=o[0]+0.5*(p2[0]-o[0]);
>   b[1]=o[1]+0.5*(p2[1]-o[1]);
>   b[2]=o[2]+0.5*(p2[2]-o[2]);
>
>   double cen[3];
>   cen[0]=a[0]+b[0]-o[0];
>   cen[1]=a[1]+b[1]-o[1];
>   cen[2]=a[2]+b[2]-o[2];
>
>   // compute the camera center, 2 plane diagonals along its normal from
>   // its center.
>   double diag
>     = sqrt(this->Dims[0]*this->Dims[0]+this->Dims[1]*this->Dims[1]);
>
>   double l_pos[3];
>   l_pos[0]=cen[0]+this->N[0]*2.0*diag;
>   l_pos[1]=cen[1]+this->N[1]*2.0*diag;
>   l_pos[2]=cen[2]+this->N[2]*2.0*diag;
>
>   // compute the camera up from one of the planes axis.
>   double up[3];
>   if (this->Form->viewUp1->isChecked())
>     {
>     up[0]=p1[0]-o[0];
>     up[1]=p1[1]-o[1];
>     up[2]=p1[2]-o[2];
>     }
>   else
>     {
>     up[0]=p2[0]-o[0];
>     up[1]=p2[1]-o[1];
>     up[2]=p2[2]-o[2];
>     }
>   double mup=sqrt(up[0]*up[0]+up[1]*up[1]+up[2]*up[2]);
>   up[0]/=mup;
>   up[1]/=mup;
>   up[2]/=mup;
>
>
>   pqRenderView *l_view=dynamic_cast<pqRenderView*>(this->view());
>   if (!l_view)
>     {
>     sqErrorMacro(qDebug(),"Failed to get the current view.");
>     return;
>     }
>
>   vtkSMRenderViewProxy *l_proxy=l_view->getRenderViewProxy();
>
>   vtkSMDoubleVectorProperty *prop;
>
>   
> prop=dynamic_cast<vtkSMDoubleVectorProperty*>(l_proxy->GetProperty("CameraPosition"));
>   prop->SetElements(l_pos);
>
>   
> prop=dynamic_cast<vtkSMDoubleVectorProperty*>(l_proxy->GetProperty("CameraFocalPoint"));
>   prop->SetElements(cen);
>
>   
> prop=dynamic_cast<vtkSMDoubleVectorProperty*>(l_proxy->GetProperty("CameraViewUp"));
>   prop->SetElements(up);
>
>   
> prop=dynamic_cast<vtkSMDoubleVectorProperty*>(l_proxy->GetProperty("CenterOfRotation"));
>   prop->SetElements(cen);
>
>   l_proxy->UpdateVTKObjects();
>
>   l_view->render();
> }
>
> On 08/01/2012 11:40 AM, Alex Rattner wrote:
>> Hello,
>>
>> I am trying to develop a compiled paraview filter that takes an input 
>> plane/direction vector (like the clip or slice filters). Does anyone 
>> know of example code that shows how to incorporate the ImplicitPlane 
>> widget into the server manager xml. In particular, I want a way to 
>> get the Camera Normal. Is this possible?
>>
>> Thanks,
>> Alex
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