[Ves] Render mobile camera video using ves

[Aashish Chaudhary]

Seems like an objective C error. Do you know the exact line that's causing
the error? If you debug in Xcode what does it tell you?

- Aashish



On Wed, Mar 19, 2014 at 3:18 PM, Li Ge <lge at ucsd.edu> wrote:

> Hi Aashish,
>
> Thanks for your help. I followed your hint and try to get
> TestTexturedBackground demo running. However, I encounter the following
> issues:
>
> In the line: rep->setPolyData(polyData),
> EXC_BAD_ACCESS(code=EXC_ARM_DA_ALIGN, ...) error occurs.
>
> The loadData method is defined in a class ISEViewer:: public vesKiwiBaseApp.
> It is same as the one in TestTexturedBackground:
>
>   void loadData(const std::string &filename, const std::string&imageFilename)
>
>   {
>
>     this->unloadData();
>
>     vesKiwiDataLoader loader;
>
>     vtkSmartPointer<vtkPolyData> polyData =
>
>     vtkPolyData::SafeDownCast(loader.loadDataset(filename));
>
>     assert(polyData.GetPointer());
>
>
>
>     vesKiwiPolyDataRepresentation* rep = new vesKiwiPolyDataRepresentation
> ();
>
>     rep->initializeWithShader(this->ShaderProgram);
>
>
>     // Here is the EXC_BAD_ACCESS error occurs
>
>     rep->setPolyData(polyData);
>
>     rep->addSelfToRenderer(this->renderer());
>
>     this->DataRep = rep;
>
>
>
>     this->setBackgroundImage(imageFilename);
>
>   }
>
>
> The method is called in a ViewController's initViewer method:
>
> -(void) initViewer
>
> {
>
>   [EAGLContext setCurrentContext:self.context];
>
>
>
>   std::string model = [[[NSBundle mainBundle] pathForResource:@"bunny"
> ofType:@"vtp"] UTF8String];
>
>   std::string background = [[[NSBundle mainBundle] pathForResource:
> @"kiwi_opaque" ofType:@"png"] UTF8String];
>
>
>
>   self->viewer = ISEViewer::Ptr(new ISEViewer);
>
>   self->viewer->initGL();
>
>   [self resizeView];
>
>
>
>   self->viewer->initShader(
>
>                            vesBuiltinShaders::vesShader_vert(),
>
>                            vesBuiltinShaders::vesShader_frag());
>
>
>   self->viewer->loadData(model, background);
>
>   self->viewer->resetView();
>
> }
>
> I am not sure what cause the issue, any help is appreciated!
>
>
> On Mon, Mar 17, 2014 at 8:29 AM, Aashish Chaudhary <
> aashish.chaudhary at kitware.com> wrote:
>
>> Dear Li,
>>
>> Although the utility is not directly exposed, it can be done. There is an
>> example int  the kiwi/testing to render texture as the background imagery.
>>
>> If you can get the video frame as texture then you can use the code to
>> achieve video rendering on the background. Let us know if you need help.
>>
>> - Aashish
>>
>>
>>
>> On Fri, Mar 14, 2014 at 3:15 PM, Li Ge <lge at ucsd.edu> wrote:
>>
>>> Hi all,
>>>
>>> I am trying to integrate ves with a mobile augmented reality app. I am
>>> wondering how to render camera video background using ves. Is it possible?
>>>
>>> --
>>> Li Ge
>>> Department of Structural Engineering
>>> UC San Diego
>>>
>>> _______________________________________________
>>> Ves mailing list
>>> Ves at public.kitware.com
>>> http://public.kitware.com/cgi-bin/mailman/listinfo/ves
>>>
>>>
>>
>>
>> --
>> | Aashish Chaudhary
>> | R&D Engineer
>> | Kitware Inc.
>> | www.kitware.com
>>
>
>
>
> --
> Li Ge
> Department of Structural Engineering
> UC San Diego
>



-- 
| Aashish Chaudhary
| R&D Engineer
| Kitware Inc.
| www.kitware.com
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