Rotate a rotated planet

I have a planet I want to rotate around its axis, but it will be tilted slightly. What script will spin it properly no matter what angle it's at?

- Jolan

I think the easiest way to do this would be, take your planet, tilt it slightly, and then put a smaller prim hidden inside it. Link the two, selecting the smaller prim last, as the root prim, then drop your rotation script into the object...

How would it know which way is down for the planet?

- Jolan

This will spin an object around its local z-axis (or whatever axis you choose), regardless of the object's rotation. The owner simply needs to touch it to get it started. If the object's in-world rotation changes, the owner simply touches it again, and it should update the llTargetOmega spin to match its new orientation. Untested since the grid is down, but it ought to work.

vector spinaxis = < 0, 0, 1 > ;
float spinrate = 1.0 ;
float gain = 1.0 ;

default
{
	touch_start( integer num )
	{
		if( llDetectedKey( 0 ) == llGetOwner() )
		{
			llTargetOmega( spinaxis * llGetRot(), spinrate, gain ) ;
		}
	}
}

YAY! Thanks a bunch! I wonder why the Helper said I'd need to know Quatrions or something...?
Stop by where ever I live (Obscuro, maybe it's in my profile) and get a spinning Halo Ring World!

- Jolan

Quaternions, heh, we don't like to talk about those around here. Luckily for us, serious rotation manipulations are usually avoidable.

Most welcome, Jolan.

And yeah, never, ever, ever manipulate quaternions directly. I just leave them all nicely abstracted as 'rotations' with pretty, un-threatening names, and kinda tip-toe around them.