vtkSmartPointer<vtkLookupTable> vtkfig::BuildLookupTable	(	std::vector< RGBPoint > &	xrgb,
		size_t	size
	)

Definition at line 56 of file vtkfigTools.cxx.

   {
     vtkSmartPointer<vtkColorTransferFunction> ctf = vtkSmartPointer<vtkColorTransferFunction>::New();
     vtkSmartPointer<vtkLookupTable> lut = vtkSmartPointer<vtkLookupTable>::New();
 
     for (size_t i=0;i<xrgb.size(); i++)
     {
       if (xrgb[i].x<-1.0e-10)
       {
         lut->SetBelowRangeColor(xrgb[i].r,xrgb[i].g, xrgb[i].b,1);
         lut->UseBelowRangeColorOn();
       }
       else if (xrgb[i].x>1.0+1.0e-10)
       {
         lut->SetAboveRangeColor(xrgb[i].r,xrgb[i].g, xrgb[i].b,1);
         lut->UseAboveRangeColorOn();
       }
       else
         ctf->AddRGBPoint(xrgb[i].x,xrgb[i].r,xrgb[i].g, xrgb[i].b);
     }
 
     lut->SetNumberOfTableValues(size);
     lut->Build();
     for(size_t i = 0; i < size; ++i)
      {
        double rgb[3];
        ctf->GetColor(static_cast<double>(i)/(double)size,rgb);
        lut->SetTableValue(i,rgb[0],rgb[1],rgb[2]);
      }
     return lut;
   }