A visregion is a volume.
It simply adds a condition: "only show object X if I am HERE", where "here" is anywhere within the volume.
This region is of the type "softvolume", which, unlike "ordinary" regions, are not simply: "ON, if any part of the avatar intersects it", but has a fuzzy logic element to them: as you walk closer to its "walls" the effect grows stronger (or weaker; you define).
For visregions, that is not used however, at least not at current and default: unlike with sounds, the display of objects do not fade in, when you walk into the volume, but simply switches on or off at a threshold value, presumably 1.000.
To create a visregion, just use any object and give it the "type: svconvex" logic property. Note that this is a convex hull, so a cube works fine, but the same cube with a hole cut out of it, is still treated as that same first cube. It's like you have shrink-wrapped it and your wrapping film stretches right across any concave bits... (To get around this limitation, you can do boolean operations between several softvolume parts, in alcscript)
To add the conditional to an object; give it the alcscript:
- Code: Select all
Myobject:
visual:
visregions:
- MyVisRegion
Never quite got what a span is exactly... I'm guessing it's simply groupings of elements. (These are then, upon rendering, draw in order, like "layers", or "passes", each on top of the previous)
by bnewton81 » Mon Jan 17, 2011 10:37 pm 
