filter: predefined values (position of the sun...)

[v1nce]

Some filters that come with inkscape states that the sun comes from top left. As I want them to come from straight top I need to change the values (offset and/or azimuth) by hand everytime.
So goes with some colors and or properties. Can't we set some variables in user's preferences and/or document definition so that they could be used by filter ?

<feOffset dx="5" dy="5" inkscape:BindTo="dx:Dx_shadow;dy=Dy_shadow" />
<feFlood flood-color="#ddd" flood-opacity="0.3" result="pict2" inkscape:BindTo="flood-color:Os_backgroundColor" />

[Rena Kunisaki (i-am-inuyasha)]

"So goes with some colors and or properties. Can't we set some variables in user's preferences and/or document definition so that they could be used by filter ?"

Does CSS provide a way to use the system default colours? If not, the first step would be to file it as a feature request for the next version of CSS.

[Pablo Trabajos (pajarico)]

Interesting idea. We could use some setting like "global illumination" or "global direction" (since this might be used for something more than just lights and shadows). This could be a Document propierty and scripts could be rewritten to take their settings from this propierty. When changed, all effects would change accordingly.

@HyperHacker: I don't know what you mean. What does system colors has to do with this request?