[vtkusers] VTK : vtkLookupTable blues..

[Ed Bachta]

You might try adding:

topog_map->SetScalarRange(0, 1000);



On Tue, 2003-09-09 at 09:56, Luke J West wrote:
> Hi,
> 
> I can get vtkLookupTable to respond to SetHueRange, SetSaturationRange and
> SetValueRange, to create just the colourtable I want, but it ignores calls to
> SetTableRange, and continues to map the colourtable onto the data range [0,1],
> which I assume is the default behavior. I've tried to do this in numerous pieces
> of code, but to no avail.
> 
> any ideas?
> 
> here is my pipeline from vtkStructuredGrid to vtkActor...
> 
> thanks,
> 
> luke
> 
> 
>   vtkStructuredGrid* topog_grd = vtkStructuredGrid::New();
>    topog_grd->SetDimensions(NX(),NY(),1);
>    topog_grd->SetPoints(topog_pts);
>    topog_pts->Delete();
>    topog_grd->GetPointData()->SetScalars(topog_arr);
>                                                                               
>                               
>   vtkContourFilter* topog_con = vtkContourFilter::New();
>    topog_con->SetInput(topog_grd);
>    topog_con->GenerateValues(Nz(),0,1000);
>                                                                               
>                               
>   vtkLookupTable* topog_lut = vtkLookupTable::New();
>    topog_lut->SetTableRange     (0,1000); // has no effect
>    topog_lut->SetHueRange       ( 0, 1);
>    topog_lut->SetSaturationRange( 1, 1);
>    topog_lut->SetValueRange     ( 1, 1);
>                                         
>   vtkStructuredGridGeometryFilter* topog_geo =
> vtkStructuredGridGeometryFilter::New();
>    topog_geo->SetInput(topog_grd);
>    topog_geo->SetExtent(0,NX(),0,NY(),0,0);
>                                             
>   vtkPolyDataMapper* topog_map = vtkPolyDataMapper::New();
>    topog_map->SetLookupTable(topog_lut);
>    topog_map->SetInput(topog_con->GetOutput());
>                                                 
>   vtkActor* topog_act = vtkActor::New();
>    topog_act->SetMapper(topog_map); 
> 
> 
> Luke J West : Research Assistant : e-Science
> --------------------------------------------
> Rm. 566/12, School of Ocean & Earth Sciences
> Southampton Oceanography Centre, Southampton
> SO14 3ZH  United Kingdom
> --------------------------------------------
> Tel: +44 23 8059 4801  Fax: +44 23 8059 3052
> Mob: +44 79 6107 4783
> 
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-- 
Ed Bachta
Technical Lead
Visualization and Interactive Spaces Lab,
Pervasive Technology Labs at Indiana University
http://vis.iu.edu