Re: transparent lines and points

[Ethan M. <merritt@u.washington.edu>]

On Thursday 03 September 2009 16:35:28 Mojca Miklavec wrote:
> Hello,
> 
> there are dozens of demos using transparent objects in gnuplot, but I
> don't remember seing support for drawing transparent lines. Is that
> possible?

It is not possible.
Transparency is currently implemented as a property of the fill style,
not the color or linetype.  So only filled objects can make use of it.

I think it would be straightforward to extend the newer rgb color support
to full rgba support. That would get you transparent everything.
But it would be a fair amount of work and touch every terminal driver.

An intermediate possibility might be to have the solid point types
honor the current fill style.  Then you could at least have transparent
circles, squares, and triangles.  I am not certain how much work that
would be.  Again it would potentially touch every terminal driver that
can handle solid points.

> I have the same question regarding transparent points, but I guess
> that drawing "with circles" might be the easiest choice in that case
> (if transparent points are not supported).

	Ethan