[vtk-developers] Manual conversion of some Tcl to Python tests.

[David Thompson]

Hi Andrew,

> ...  it would be nice to have in VTK 6 a class of colors and
> their names.
> What do people think of creating a class called say vtkNamedColors
> where the underlying structure would be a std::map<std::string,
> std::vector> with this map prefilled with the colours defined in
> colors.py or colors.tcl?

I like it but would like to add a twist.

> There would be only two functions e.g GetColor(std::string) returning
> a std::vector and SetColor(std::string, std::vector) - this function
> would allow the user to add new colours.

How about

  GetColor( std::string palette, int swatch = 0 )

so that a name could refer to a single color name (ignoring the swatch argument) or to an entire palette?

The storage could be the same... a std::map<std::string,std::vector<double> > could have any length that was a multiple of 4 (RGBA) and the ( swatch % (length/4) ) would be used to get the offset into the vector of the first color.

That would let us include the Brewer color palettes and others as well.

	David