Rotation Per Particle Expressions

[shmeck]

Can anyone help me with expressions to enable instanced planes to behave like snowflakes that always face the same direction? I'd like these planes to:

1. rotate verry slowly, only along the Z-axis (360 in about 30 sec)
2. make the direction of rotation ( + or - along the Z-axis) be randomly determined Per Particle at creation

I have an emitter with a geometry replacement instancer so that it emits planes with image sequences of snowflakes mapped onto them. They face the camera, & I'd like each one to rotate either right or left as they emit. It's probably very simple, but I'm new to MEL..

thanks,

S

[joojaa]

QUOTE(shmeck @ 05/11/08, 10:09 AM) [snapback]285369[/snapback]
but I'm new to MEL..

Expressions aren't mel! Anyway this has nothing really to do with mel but rather what the instaner ode does and exposes to you.

[shmeck]

ok, where should i post this?