[vtkusers] vtklookuptable

[杨衡]

Hi,all
  I have used the vtkColorTransferFunction to map the scalar to rgba and the
effect is good .By using addpoint(int ,r,g,b), I clearly map the int to rgb.
  But , now I need use vtklookuptable and I have scalars from 0 to 3000 .I
try to use the following code:
     
 	    table=vtkLookupTable::New();
	 	table->SetRange( 0,3000);
  	    table->Allocate(3001);
      while ( p->next)
	{
		p=p->next;
         
         
        ctfun->AddRGBPoint(floor(p->point/10.0), p->r/255.0 , p->g/255.0,
p->b/255.0);/////when use vtkColorTransferFunction
        table->SetTableValue(floor(p->point/10.0), p->r/255.0 , p->g/255.0,
p->b/255.0,p->opc/100.0);/////use vtklookuptable
}
Table->build();
  But the result pic is not what I want ?
  Can you tell me why and how to deal with it using vtklookuptable.
  Thanks!

	    
        

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