Opening/closing book - getting cover to rotate around binder

Hi all,

I'm trying to make a book. When it is "opened", the cover should rotate from being closed, to being open.

Pretty simple, but when I attempt to rotate it, the prim rotates around its center, rather than its left hand side. I need it to appear to be rotating around the binder.

Does anyone have any code which will compute this sort of thing? I've found some stuff on the LSL Wiki, but basically it isn't at all clear.

Isn't this what happens, sort of, with any of the scripted doors in SL?
Maybe that thought will help...

Relating this problem to doors... Whenever I need something to rotate on a certain point, I make another prim to act as a sort of hinge... The rotation script will make the base prim rotate, from it's center, so keep that in mind.

also, you could try cutting the book in half, like some doors are made, that would solve the problem, I think.

This should be similar to opening and closing doors.

For that, the Rot commands generally cause the prim to rotate around its X axis. You can set it to rotate around another object, but that gives you an extra prim. To get around the Prim limit, cut the door between .375 and .875. That'll give you a nearly cubic (it won't be absolutely perfect, but close enough that nobody will notice) object that is split in half on its axis. Then, you can give it a Rot command without adding an extra prim. Just be careful about exactly what one you use.

Another method to get a box that rotates around its edge is to do some prim-torture: create a sphere, set its dimple end to half (you end up with half a sphere) then turn it into a cube, it will stay half-cut.

Thanks for everyone that replied. The solution quoted is the one which worked... cutting it made the prim rotate just where I wanted it to! I had to re-align the textures and so on, but nothing major!