Add unicode multiplot

[pjaap]

To achieve this, we need to set the size of the subplots and hand over independent Gridvisualizers for the subplots

Results look promising:

Need to check if the changes break anything with the other Plotters

[pjaap]

I adjusted the total resolutions a bit and I think the result is now very nice:

[pjaap]

rebased.

[pjaap]

Now also with correct text colors

[chmerdon]

Very nice. While we are at it, I added a provisoric vectorplot. It needs some more tweaking with the arrow heads and tails and color customizations, but seems to work in principle. One can test it with the returned plot from Example201 in ExtendableFEM. However, reveal(plt) currently does not work, but show(plt) allows a peak.

[chmerdon]

Maybe it is better to use unicode arrow characters (and color them according to their strength) instead to try to draw real arrows. However, that probably restricts the direction accuracy to 45 degree steps...

[pjaap]

Long journey towards the end:

This is Ex101 from ChargeTransport.jl: (slightly modified the code there to precompute x/y limits)

compared to PythonPlot:

We have now correct scalings and colors.

What is missing (in UnicodePlots)

• no marker support
• line styles (I tried to emulate :dash etc by mixing the color with grey, but this did not work)
• there is a bug in the y-axis for custom scaling functions (I added a :symlog)

[j-fu]

Starts looking reasonable!

I usually test things by running (well, yes, we neede some developer docs for this...)

julia> using GridVisualize
julia> import XXXPlots
julia> default_plotter!(XXXPlots)
julia> includet("examples/plotting.jl")
julia> plotting_multiscene()

Two issues emerge in a quick check:

• How unicode plots handles RGB color values ? Ist there somewhere a projection of RGB onto what unicodeplots can handle
• May be we should define "empty" dispatches for sclarplot3d etc. (as e.g. exist for Plots)

[pjaap]

@j-fu thanks for the hint. plot_multiscene does look good now. And UnicodePlots is now also tested.

[pjaap]

Plot looks nice:

@j-fu: this image should probably put into the README?

[pjaap]

rebased.

[pjaap]

This is the current state:

I think we are ready for merging. Thanks a lot @chmerdon !