Hi Wojciech,
if you want to check out what goes into the entire render process in MITK you
could take a look at the mitk::RenderingManager (which is called by the
requestRenderWindowUpdate), especially
RenderingManager::ForceImmediateUpdate(vtkRenderWindow *renderWindow for a
direct rendering. Additionally you might find [1] helpful.
Apart from that, having a minimal example of what you are trying to achieve
would be helpful.
Best,
Caspar
[1] http://docs.mitk.org/nightly/QVTKRendering.html
Von: Wojciech Lassmann [mailto:[email protected]]
Gesendet: Dienstag, 28. Februar 2017 19:36
An: [email protected]
Betreff: Re: [mitk-users] mitk-users Digest, Vol 129, Issue 14
I am starting from scratch (using mitk as a toolkit), so i don't have access to
RequestRenderWindowUpdate.
What I do now is :
ui->myQmitkStdMultiWidget->update();
ui->myQmitkStdMultiWidget->mitkWidget4->update();
ui->myQmitkStdMultiWidget->mitkWidget4->GetRenderWindow()->Render();but it
doesn't work.
I have recently noticed that vtk RotateWXYZ does allow to rotate around a
vector. Is there any way of rotating contents of mitkWidget4 this way?
Z poważaniem,
Wojciech Lassmann
2017-02-28 13:35 GMT+01:00
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Today's Topics:
1. Re: Render vtkCamera position update on QMitkRenderWindow
(Girish Lande)
2. Re: using mitkRotationOperation (Albert Alises)
----------------------------------------------------------------------
Message: 1
Date: Mon, 27 Feb 2017 09:03:18 +0530
From: Girish Lande <[email protected]<mailto:[email protected]>>
Subject: Re: [mitk-users] Render vtkCamera position update on
QMitkRenderWindow
To: Albert Alises <[email protected]<mailto:[email protected]>>
Cc: [email protected]<mailto:[email protected]>
Message-ID:
<CAGOvywZ26Scw28+fARTDW-GnpOv5PtYiLMucdhtC=pxw34g...@mail.gmail.com<mailto:[email protected]>>
Content-Type: text/plain; charset="utf-8"
Hi Albert,
Can you try changing this position vector.
currentCamera->SetPosition(0.0,0.0,0.0);
in my observation setPosition actually defines direction vector in which
camera is looking at the object.
So I think it should have some direction .
For e.g to look at same object in 3 different directions(standard x,y,z) I
do this
case 0:
cam->SetFocalPoint(0,0,0);
cam->SetPosition(1,0,0);
cam->SetViewUp(0,0,1);
break;
case 1:
cam->SetFocalPoint(0,0,0);
cam->SetPosition(0,-1,0);
cam->SetViewUp(0,0,1);
break;
case 2:
cam->SetFocalPoint(0,0,0);
cam->SetPosition(0,0,1);
cam->SetViewUp(0,1,0);
break;
regards,
Girish
On 24 February 2017 at 19:50, Albert Alises
<[email protected]<mailto:[email protected]>> wrote:
> Hello Ingmar,
>
> Thank you for your response! I did try to do that but unfortunately the
> scene keeps going black after executing these changes. Calling any event on
> the window makes the view to render correctly (wheel event, or just moving
> around), so it has to be a method called when doing that on a
> QmitkRenderWindow, just cannot seem to find it...
>
> Thank you,
> Albert.
>
> 2017-02-24 15:05 GMT+01:00 Ingmar Wegner
> <[email protected]<mailto:[email protected]>>:
>
>> Hi Albert,
>> did you try orthogonalizing the view up vector before calling
>> RequestUpdate?
>>
>> currentCamera->OrthogonalizeViewUp();
>>
>> mitk::RenderingManager::GetInstance()->RequestUpdateAll(
>> mitk::RenderingManager::REQUEST_UPDATE_3DWINDOWS);// For 3D widget only
>>
>> This recomputes the view up vector to force it to be perpendicular to
>> camera->focal point vector. (See vtkCamera docu)
>>
>> Ingmar
>>
>> (Written on cellphone)
>>
>> Am 24.02.2017, 13:13, Albert Alises
>> <[email protected]<mailto:[email protected]>> schrieb:
>>
>>> Hello everyone,
>>>
>>> I am having trouble rendering the update of a vtkCamera on a
>>> QMitkRenderWindow. I have a renderWindow which looks at a given scene. I
>>> get its associated* vtkRenderWindow* and from it, the* ActiveCamera()*
>>> (Which is a vtkCamera object).
>>>
>>> I then modify the position and the view of that camera by doing that:
>>>
>>> currentCamera->SetPosition(0.0,0.0,0.0);
>>> currentCamera->SetViewUp(1.0,0.0,0.0);
>>> currentCamera->SetFocalPoint(0.7, 0.3, 0.4);
>>> vtkTransform* translationToPoint = vtkTransform::New();
>>> translationToPoint->Translate(40, 20, 30);
>>> currentCamera->ApplyTransform(translationToPoint);
>>>
>>>
>>> After applying these transformations, the renderwindow turns black,
>>> which suggests that the render has not been updated. I have tried:
>>>
>>> currentCamera->Modified();
>>> this->RequestRenderWindowsUpdate();
>>> Paint method of the Base Renderer from MITK
>>> vtkRenderWindow->Update();
>>>
>>> and rendering the camera, render windows, renderer associated.... None
>>> of them is working though.... However, the rendering is updated correctly
>>> when scrolling on the window with the mouse. Which method is the correct
>>> one to call for the window to show the new scene after modifying the
>>> vtkCamera associated to a the window? (the one the WheelEvent method on the
>>> QMitkRenderWindows seems to call).
>>>
>>> Thank you very much,
>>> Albert.
>>> ------------------------------------------------------------------------------
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>>
>>
>
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--
thanks & regards,
Girish
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Message: 2
Date: Tue, 28 Feb 2017 13:35:39 +0100
From: Albert Alises <[email protected]<mailto:[email protected]>>
Subject: Re: [mitk-users] using mitkRotationOperation
To: Wojciech Lassmann <[email protected]<mailto:[email protected]>>
Cc: [email protected]<mailto:[email protected]>
Message-ID:
<CAGjZvMwJAmY2pLG4Qza5h1P=mc76tfv_kcjx2tsmjf9nxl4...@mail.gmail.com<mailto:[email protected]>>
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Hello Wojciech,
The mitk Rotation Operation works as follows:
The first parameter indicates which operation do you want to perform, in
our case the rotation, so the first parameter is *mitk::OpROTATE* instead
of 1. The second parameter indicates the point to rotate around. by setting
it to *geo->GetCenterInWorld() *, you are rotating around the center of
your view, which is correct based on your goals. The third and four
parameters refer to the vector of rotation and angle of rotation,
respectively. That is, they represent a rotation in *Axis-Angle *form.
In your case, you are rotating an angle given by *position *(MITK treats
them as non radian angles), *around the axis* defined by vector (in your
case, (0,1,0), but note that you assigned the position 0 of the vector 3
times! instead of: mitk::Vector3D vector = mitk::Vector3D();
vector[0]=0.0;
vector[1]=1.0;
vector[2]=0.0;)
Once defined this operation, you apply it to your geometry such as:
* geo->ExecuteOperation(op);*
And update the geometry. Try defining the rotation with the parameters
mentioned above and also render again using *this->RequestRenderWindowUpdate
*and see if it works.
Cheers,
2017-02-27 0:20 GMT+01:00 Wojciech Lassmann
<[email protected]<mailto:[email protected]>>:
> Hi, i have problem.
> I want to rotate the mitkWidget4 cotents arround 3 perpendicular vectors
> (that would rotate with the world)
> I allready know that VTK functions are not much of a help, as they rotate
> around static axis, And i want to try with mitkRotationOperation, but seems
> thet i dont understand it.
>
> i use qt slider moved signal to trigger the slot, and read its position
>
> qDebug() <<QString(position); //to check if is propperly trigered
>
> // typedef mitk::Vector<ScalarType, 3> Vector3D;
> mitk::Vector3D vector = mitk::Vector3D();
> vector[0]=0.0;
> vector[0]=1.0;
> vector[0]=0.0;
>
> mitk::RotationOperation* op = new mitk::RotationOperation(1, //i dont
> actually know what does tis fo as it just an int, what value should it have
> geo->GetCenterInWorld(), //where geo is time geometry of the data storage
> initialising the views
> vector,
> (double)position); //which is the slider value
> geo->ExecuteOperation(op);
> ui->view2->mitkWidget4->update(); //where view2 is my temorary name
> for QmitkStdMultiWidget
>
> This doesn't seem to do anything, and I have no Idea why.
>
> (http://docs.mitk.org/2015.05/GeometryOverviewPage.html
> *geometry->GetVtkMatrix()->Rotate()
> *mentioned at the end of the page doesn't seem to exist anymore)
>
> With Regards,
> Wojciech Lassmann
>
> ------------------------------------------------------------
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