Particles Instancer

[mrwolfy]

Trying to make aim direction velocity work, so I can animate some arrows.

modeled the arrow across the X axis. created animated particles. Instanced the arrow geometry.

Now I think I want to change the Rotation Options of the particleShape Geometry Replace to Aim Direction = Velocity. When I do that nothing changes. Any ideas?

File is here, if you want a look:

http://mrwolfy.com/3d/particlesInstancerTest.mb

Thanks for any help.

W

[mrwolfy]

I think I answered my own question. Seems to be a bug, I'm using 2009 on a Mac.

executing this MEL did the trick:

particleInstancer -e -name instancer1 -aimDirection velocity particleShape1;

best,

W

[sagun-manandhar]

what if you want to aim and spin at the same time using just rotation parameters in instance ????????

[joojaa]

then you want to bind upvector to the particle too.

PS: its not a bug per see its just thet the gui si a bit lazy in implementing things after the fact.

[sagun-manandhar]

how joooja. how.. can u pls explain in deail.

pls help

[joojaa]

Before asking could you actually look at your user interface for while please.

add a custom vector attribute to your particle (if you dont know read the manual, your going to need to anyway start now if you havent yet)

in the isntancer dialogbox (yes you allways need to choose the BOX next to the isntancer menuitem), check allow all datatypes and assign the aim direction to velocity and aim up axis to your vector. Now all you nee dto do is put some values to that vector and rotate it about.

[sagun-manandhar]

what are those values would be ?

trying these :

particleShape1.custom_upVector = <>;
particleShape1.custom_upVector = <>;
particleShape1.custom_upVector = <>;
?????

[sagun-manandhar]

particleShape1.custom_upVector = <>

still not rotating .. arghhhhhhh..

[sagun-manandhar]

yesssss. got it.

particleShape1.custom_upVector = <>;

customRandom is PP attribute for speed multiplier thus giving you random spin speed..

thanks Joojaa , thanks for the help.