[Paraview] writing spheres, cones, etc.

[Benjamin Auffarth]

I just managed to set up a keyboard callback with the render window that
calls the pov writer (tutorial
http://www.vtk.org/Wiki/VTK/Tutorials/Callbacks). This sets everything,
including the right camera perspective.
I wonder why so few render programs (only povray?) accept more generic types
such as cones and spheres, etc. and why there are seem to be no programs
that read povray format and allow turning the camera.

----
Benjamin Auffarth
KTH, Computational Biology and Neurocomputing (CBN),
Albanova Universitetscentrum, Roslagstullsbacken 35,
S-100 44 Stockholm, Sweden
room 162:021B, tel. +46 8 790 8699


On Sun, Feb 13, 2011 at 8:22 PM, Benjamin Auffarth <auffarth at csc.kth.se>wrote:

> Hi,
>  thanks Andy, for the information about python and povray. Pvpython and
> pvbatch sound good. Maybe the matlab interface also provides what I need.
> Indeed, I need to automate the process to read in text files with
> coordinates and set then objects at these coordinates. I am now half-way
> through parsing the text file and setting the objects in C++ and I don't
> want to change again to a different language. Could somebody provide an
> example of how to write a povray file with the current camera view in C++?
> thanks,
> Benjamin.
>
>
> ----
> Benjamin Auffarth
> KTH, Computational Biology and Neurocomputing (CBN),
> Albanova Universitetscentrum, Roslagstullsbacken 35,
> S-100 44 Stockholm, Sweden
> room 162:021B, tel. +46 8 790 8699
>
>
> On Sun, Feb 13, 2011 at 7:26 PM, Andy Bauer <andy.bauer at kitware.com>wrote:
>
>> Hi,
>>
>> Is there a reason you want to code up in C++?  You can create spheres and
>> cones (under the Source menu) in ParaView and set their parameters like
>> center, resolution, size, etc.  There are also other common geometries like
>> cylinders, boxes, etc.  You can save the results in a POV file by choosing
>> Export and choosing POV as the file type.  If you want to automate the
>> process you can record a python script as well which can be modified to
>> change the filter parameters and then run it with either pvpython or
>> pvbatch.
>>
>> Andy
>>
>> On Sun, Feb 13, 2011 at 10:29 AM, Benjamin Auffarth <auffarth at csc.kth.se>wrote:
>>
>>> Hi,
>>>  I am new to using VTK and paraview, so excuse me if my question is too
>>> obvious. I've been looking into several manuals and the online VTK wiki, but
>>> couldn't find exactly what I was looking for.
>>>  I want to visualize abstract shapes, mainly spheres and cones. After
>>> looking into different formats, such as legacy VTK, and trying to create
>>> these shapes from polygons, I am now using VTK from C++ to create the shapes
>>> I want.  However my problem is now that I don't know how to store them
>>> (except for taking a screenshot). Is there a writer I can use for that?
>>>  Also: once I am satisfied with my visualization, I would like to be able
>>> to export to povray. It would be very convenient to be turn my objects until
>>> I have a good viewpoint and then export with camera and light sources
>>> accordingly to pov format. Could somebody give a simple example how this is
>>> possible?
>>> Thanks a lot,
>>> Benjamin.
>>>
>>>  My template now looks like this and is based on examples in the wiki:
>>>
>>> int main(int argc, char** argv[])
>>> {
>>>     std::vector<vtkSmartPointer<vtkPolyDataAlgorithm> >
>>> geometricObjectSources;
>>>
>>> geometricObjectSources.push_back(vtkSmartPointer<vtkSphereSource>::New());
>>>
>>> geometricObjectSources.push_back(vtkSmartPointer<vtkCylinderSource>::New());
>>>
>>>     std::vector<vtkSmartPointer<vtkRenderer> > renderers;
>>>     std::vector<vtkSmartPointer<vtkPolyDataMapper> > mappers;
>>>     std::vector<vtkSmartPointer<vtkActor> > actors;
>>>
>>>     // Visualize
>>>     vtkSmartPointer<vtkRenderer> renderer =
>>> vtkSmartPointer<vtkRenderer>::New();
>>>     vtkSmartPointer<vtkRenderWindow> renderWindow =
>>> vtkSmartPointer<vtkRenderWindow>::New();
>>>     renderWindow->AddRenderer(renderer);
>>>     vtkSmartPointer<vtkRenderWindowInteractor> renderWindowInteractor =
>>> vtkSmartPointer<vtkRenderWindowInteractor>::New();
>>>     renderWindowInteractor->SetRenderWindow(renderWindow);
>>>
>>>     // Create a source, renderer, mapper, and actor
>>>     // for each object
>>>     for(unsigned int i = 0; i < geometricObjectSources.size(); i++){
>>>         geometricObjectSources[i]->Update();
>>>
>>>         mappers.push_back(vtkSmartPointer<vtkPolyDataMapper>::New());
>>>
>>> mappers[i]->SetInputConnection(geometricObjectSources[i]->GetOutputPort());
>>>
>>>
>>>         actors.push_back(vtkSmartPointer<vtkActor>::New());
>>>         actors[i]->SetMapper(mappers[i]);
>>>
>>>         renderer->AddActor(actors[i]);
>>>     }
>>>
>>>   renderWindow->Render();
>>>   renderWindowInteractor->Start();
>>>
>>>   //// Here I want to write my objects into a file
>>>   //// or: turn the object and then export to povray with camera
>>> according to viewpoint
>>>
>>>   return EXIT_SUCCESS;
>>> }
>>>
>>>
>>> ----
>>> Benjamin Auffarth
>>> KTH, Computational Biology and Neurocomputing (CBN),
>>> Albanova Universitetscentrum, Roslagstullsbacken 35,
>>> S-100 44 Stockholm, Sweden
>>> room 162:021B, tel. +46 8 790 8699
>>>
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>>
>
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