Variable circle degree possibly with different colors

[Hanikatu]

Is it possible to display different circle degrees in MapCSS?

E.g.: 0°-30° = green; 60°-90° = white; 100°-140° = red

If not, would it be possible to implement?
I would need it for multiple light directions.
Floodlights or lighthouses

[taylor.smock]

We'd probably have to change a fair amount of code for this. I can see the usage, I just don't know how needed it is, especially with respect to our current backlog.

Code changes:

1. Symbols would need to accept ranges for where they show up
2. The ranges would need to be able to accept additional information]
3. We may have to use slower code paths than we currently are

Possible mapcss:

symbol-shape: circle;
symbol-customization: { // We need to have something to indicate that this is a "block". I don't think we want to have the customization on the same "root" level as the `symbol-shape` either.
    // start-degree: { customization options, preferably the same as those already present for the symbol }
    0: {
        symbol-color: green; // Set the color of this arc to "green"
    };
    30: {
        symbol-color: none; // Set the color of this arc to "none" (maybe null would be better?)
    };
    60: { symbol-color: white; };
    90: { symbol-color: none; };
    100: { symbol-color: red; };
    140: { symbol-color: none; };
}
symbol-shape: square; // How do we handle multiple shapes? Do we just require users to put them on separate layers?

I'm going to want other people's opinion, since this is something that external users will be using. Specifically, those using JOSM stylesheets downstream, and other people who might be using this feature.

[Klumbumbus]

One internal usecase would be to render the direction key for viewpoints (see also #14989). But I also see this rather low priority.