[Scilab-users] {EXT} density in a graph

[Jean-Philippe Grivet]

Le 23/01/2020 à 17:24, Dang Ngoc Chan, Christophe a écrit :
> Hello,
>
>> De : Jean-Philippe Grivet
>> Envoyé : jeudi 23 janvier 2020 16:36
>>
>> I am drawing a graph in a gray scale (say from 1 to 32), using lines of different
>> density. I would like that, in the region of intersection of two lines, the shade
>> of gray be the sum of the densities of each line.
>> How can I manage that ?
> I'm affraid I can't figure out what you're trying to do.
>
> Maybe a small drawing or a small sample of data?
>
> Do you have lines with a linear density and try to draw a surface density or?
>
> --
> Christophe Dang Ngoc Chan
> Mechanical calculation engineer
>
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Sorry that I haven't been clear enough. Suppose that I want to draw a 
figure X made up of two strips. Strip 1 (SW_NE) has gray level 3; strip 
2 (NW-SE) is drawn at gray level 7. The region of overlap of these 
strips (roughly a parallelogram) should display a density of 7 (darker 
than either strip). Is that possible within Scilab ?