Re: alpha blending

[Ugo Taddei <p6taug@xxxxxxxxxxxxxxxxx>]

Hi Brad,

Brad Buchsbaum wrote:
> 
> Hi,
> 
> Is it possible to take two FlatFields representing rgba values and combine
> them using alpha composition into a third FlatField?
> 
> e.g. f1(r, g, b, a) + f2(r, g, b, a) --> f3(r, g, b, a) ?
> 
> This could be computed manually, but is there Visad method for doing this
> sort of thing?

Perhaps the method (from visad.DataImpl):

public Data add(Data data)

would do the trick?

That is, f3 = (FlatField) f2.add( f1 );


Cheers,

Ugo