OLPCities/Links
A "link" usualy has 2 files/sprites. It's neither like 3D objects nor like Hard objects. The avatar can not go behind it. He can only to collide with the "shadow" (figure having the sufix "S") that will transport him to another place that can be another Lot, another City or a "normal" web-page. The Z of a "shadow" is: 0. The Z of a link is 12, like any of the Hard objects
Take a look of some "links" working at this LOT.
The basic "link" is that to go to a "normal" web-page:
At the "normal" web page you need to put a link to go back to the Lot of OLPCity you came from. The icon to be clicked you see at right.
A link to go to the next Lot,we call it Transit. Not two files here. It's a green paralelogram:
The "gates" are links to a distant Lot or to another OLPCity. There are a "gate-in" and a "gate-out". When the avatar arrives to a Lot he arrives going out of a "gate-out". If he likes to go to any other Lot, he collides with the "gateS" (a "shadow") of a "gate-in". A "gate-out" doesn't have "shadow".
An special "link" is the "Time-Space Portal" used to go to (and return from) another "time" (by example the year 2000 A.C.) or "space". It's like one of the Animated objects but has a "shadow" to be collided by the avatar.
Take a look to a "Time-Space Portal" working at this LOT. Wait a little because there are many images to be downloaded (the browser of the OLPC station only opens the page after all the images are downloaded but the IE works differently).
