Rotating clock hands

Hi guys!

I tried to build a simple clock, rotating one hand at 30° every 5 seconds with a timer event. That's not a problem, but the default rotation point is at the center of the hand (just a simple bar). I need to move the rotation point to one end of the bar now to rotate it around the center of my built clock.

I tried to apply the example in the LSL wiki, but I can't figure out how the correct rotation vector has to be applied to the bar... Can anyone give me a simple example for rotation a bar on a specified interval like a second hand on a clock would do?

Thanks in advance!

Tsutomu

The easiest way is to cut the prim for the clock-hand, probably 0.375 and 0.875 although some other combinations work well too. That will give you a prim which apparently has its centre of rotation at one end (because the other half of the prim isn't drawn) so it will rotate smoothly.

Check out the clock on my tower in Acontia (see sig for location) for an example of that technique.

Wow, impressive piece of hardware... That clock is built using the half-prim technic described above?

I thought about that too, but it looked to me like a... well... a workaround. But I think in SL it's more important to have short calculations than correct 3D mathematics, isn't it? So I will create my clock with the half-prim technic, too. Thanks for the hints, guys!

Tsutomu

Just an idea: I made a clock using a mostly transparent texture on a flattened cylinder that just rotates the texture. I found it a lot simpler.