[vtkusers] vtkTransform::MultiplyPoint() ... Mysterious behavior !

[Sebastien Auclair]

Greetings !

A wish to apply a transformation filter to the points of a PolyData.
If i simply do :

for (int i = 0; i < pointCount;
{  
        temp = m_polydata->GetPoint( i );
        transform->MultiplyPoint (buffer,buffer); 
}
Only half (or so) of the points will be modified !!! And the transformation is a translation that should modifiy all points.

But if i do something "Time Cousuming" like :

for (int i = 0; i < pointCount; i++){  
        temp = m_polydata->GetPoint( i );
        buffer [0] = (temp)[0];
        buffer [1] = (temp)[1];
        buffer [2] = (temp)[2];
        transform->MultiplyPoint (buffer,buffer);
  
        (temp)[0] = buffer [0];
        (temp)[1] = buffer [1];
        (temp)[2] = buffer [2];
}

Then it works !!!!

Anyone knows why ?

Thanks !

____________________________________________
Seb