[IGSTK-Users] Setting a color to ImageSpatialObjectRepresentation = Segmentation Fault

[Vincent Gratsac]

Hi igstk-users,

I made some modifications to igstkImageSpatialObjectRepresentation.txx 
code in order to correct my problem when setting a color or an opacity 
to an image spatial object.
Here are the few lines that have been changed in CreateActors() method:
>   // Converting RGB color to HSV values     
>   float hue=0;
>   float saturation=0;
>   float value=0;
>   vtkMath::RGBToHSV(this->GetRed(), this->GetGreen(), 
> this->GetBlue(),&hue, &saturation, &value);
>
>   m_LUT->SetTableRange ( (m_Level - m_Window/2.0), (m_Level + 
> m_Window/2.0) );    
>   m_LUT->SetSaturationRange (saturation, saturation);
>   m_LUT->SetHueRange (hue, hue);
>   m_LUT->SetValueRange (0, value);
>   m_LUT->SetAlphaRange(m_Opacity, m_Opacity);
>   m_LUT->SetRampToLinear();
>  
>
>   m_MapColors->SetLookupTable( m_LUT );
Note that you have to include vtkMath.h file.

I hope this code will help someone, or could be integrate to IGSTK in 
the future.

Have a nice day,

Vincent

Vincent Gratsac a écrit :
> Hi igstk-users,
>
> I'm trying to set a color (other than white) to an 
> ImageSpatialObjectRepresentation.
> With my application, it causes a segmentation fault. I add one line in 
> the NeedleBiopsy example to check that it does not come from by code 
> and I also get a seg fault :
>> m_ImageRepresentationAxial->SetColor(0.5,1,1);
>
> Is it a bug or did I make a mistake ?
>
> Note that my code works fine while setting the color the a 
> MeshObjectRepresentation.
>
> Vincent
>

-- 
Vincent Gratsac
----------------------------------------------------
Unité/Projet VisAGeS U746
INSERM/INRIA/CNRS/U. de Rennes I
IRISA
Campus de Beaulieu, 35042 Rennes Cedex, France

Ph:  +33 (0) 2 23 23 49 20/ Fax: +33/0 2 99 84 71 71
email: Vincent.Gratsac at irisa.fr
http://www.irisa.fr/visages/
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