[vtkusers] Color texture mapping

[John Biddiscombe]

If you use vtkScalars::SetNumberOfComponents(3);
Make sure they are 3 chars and not 3 floats. Chars are rendered as RGB, 
floats are assumed to be something else and the first component only is 
mapped through a default lookuptable or something like that.

JB

At 16:20 30/07/2001, Tim Hutton wrote:
>Hello!
>
>I would like to map an RGB image onto a VTK object, is this possible?
>
>I have created a vtkScalars object:
>
>vtkScalars *scalars = vtkScalars::New();
>scalars->SetNumberOfComponents(3);
>scalars->SetNumberOfScalars(X*Y);
>
>and filled it with the RGB values for my image, I would now like to use 
>this as input to a vtkTexture
>for mapping onto an object. When I try this I get only the first channel 
>(red) being used, through a
>rainbow lookup table.
>
>Any pointers are much appreciated!
>
>Thanks,
>
>Tim.
>
>
>---------------------------------------------------------------------------
>Tim Hutton,                        http://www.eastman.ucl.ac.uk/~dmi/MINORI
>Research Fellow & PhD student,                   T.Hutton at eastman.ucl.ac.uk
>MINORI Project, Biomedical Informatics Unit,     Tel: [+44] (0)20 7915 2344
>Eastman Dental Institute, UCL,                   Fax: [+44] (0)20 7915 2303
>256 Gray's Inn Road, London WC1X 8LD, UK      Mobile: [+44] (0)7748 678 832
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