vtkProjectedTetrahedraMapper does not properly support IndependantComponents with 2 components

This issue was created automatically from an original Mantis Issue. Further discussion may take place here.

When using a 2-component scalar with IndependantComponents, the two components are not processed through the color/opacity functions provided.

The "Map2DependantComponents" needs to be modified to be more like the following:

template<class ColorType, class ScalarType> void Map2DependentComponents(ColorType *colors, ScalarType *scalars, vtkIdType num_scalars, vtkVolumeProperty *property) { ColorType *c = colors; ScalarType *s = scalars; vtkIdType i;

if (property-&gt;GetColorChannels() == 1)
  {
  vtkPiecewiseFunction *gray = property-&gt;GetGrayTransferFunction();
  vtkPiecewiseFunction *alpha = property-&gt;GetScalarOpacity();

  for (i = 0; i &lt; num_scalars; i++, c += 4, s += 2)
    {
    c[0] = c[1] = c[2] = static_cast&lt;ColorType&gt;(gray-&gt;GetValue(s[0]));
    c[3] = static_cast&lt;ColorType&gt;(alpha-&gt;GetValue(s[1]));
    }
  }
else
  {
  vtkColorTransferFunction *rgb = property-&gt;GetRGBTransferFunction();
  vtkPiecewiseFunction *alpha = property-&gt;GetScalarOpacity();

  for (i = 0; i &lt; num_scalars; i++, c += 4, s += 2)
    {
    double trgb[3];
    rgb-&gt;GetColor(s[0], trgb);
    c[0] = static_cast&lt;ColorType&gt;(trgb[0]);
    c[1] = static_cast&lt;ColorType&gt;(trgb[1]);
    c[2] = static_cast&lt;ColorType&gt;(trgb[2]);
    c[3] = static_cast&lt;ColorType&gt;(alpha-&gt;GetValue(s[1]));
    }
  }

}