Randomly Sized & Rotated Sprite Particles

[TheRispo]

On the particle shape attributes go to the "add dynamic attributes" menu and use the following perParticle Attributes (under particle tab):

spriteScaleXPP
spriteScaleYPP
spriteTwistPP

[ZayneoO0]

thanks so much, will give it a try now

[ZayneoO0]

worked great, Dont know how i missed that ! haha thanks so much hey

cheers

Z

[ZayneoO0]

Any ideas on how to animate the random twistPP ?

[TheRispo]

hay zayne.. try using runtime expressions for that, a simple example would be the following

spriteTwistPP += 1;

this will make them rotate a little each frame... play with the expressions if you want diferent behavior.. I recall a gnomon dvd (or two) covering just sprite particles.. They were great but I think they are not for sale right now and might be a little difficult to get your hands on one of them

[Wick3dParticle]

Depending on what effect you are after... Generally the way I work is create an attribute like twistRotPP, and give that a rand value. Then you can use that to drive your twist in runtime. If you want random twist directions, assign a negative to positive range on your twistRotPP. Like twistRotPP = rand(-2,2) for example.

~Ilan

[ZayneoO0]

awesome guys tx alot, that all worked out, however im having trouble rendering the sprite with a the PP settings, ive tried cacheing them and rendering in Hardware renderer, but they still render in a uniform fashion, unlike in my viewport it looks 100%

[ZayneoO0]

i hope this helpshttp://forums.cgsociety.org/attachment.php?attachmentid=148949

[Wick3dParticle]

Hey Z,

Are you using traditional particles or nParticles?

~Ilan

[ZayneoO0]

im using traditional particles

[hkspowers]

Maya may be having trouble locating your cache. Is your project set correctly? If everything is set correctly then check to see if your particles are using the cache.


Solvers--> Edit oversampling or cache settings --> use particle disk cache

Make sure the directory and cache are the right ones and the check box is checked.

[ZayneoO0]

no, my project is set up correctly, and the cache is being used , as i can scrub my particles in the timeline, why is this so tricky!

[ZayneoO0]

It seems that every renderer is just disregarding my PP settings, i dont know why this is

[hkspowers]

Can you attach image file and scene file? I'll take a look at it see if it does it on my end.

[ZayneoO0]

Here is the scene file, hope you can figure it out

thanks alot

Z

[hkspowers]

Email hkspowers@gmail.com

[ZayneoO0]

hey, im trying to upload the zip but it is giving me problems, do you have an email address that i can send it to?

thanks again

Z

[hkspowers]

I'm getting the same error. It must be a bug of some sort, the hardware render buffer works fine though. For this set up I would just go with that. Bizarre :surprised

I just set up a new scene and there is def something wrong with your scene. haha
A fresh scene renders fine in maya hardware but something in your scene corrupted my Maya lol.

I went to assign a texture to a new sprite particle object in a new scene and after I assigned a lambert shader the sprites automatically assigned your heart image to my sprites even though I did not set a texture I didn't even hit the browse button, I simply assigned a lambert and "BAM" hearts everywhere haha. It renders fine but I would blow away my pref's folder if I was you and start a fresh scene. This one has something wrong with it.

[ZayneoO0]

yeah, pity as the hardware render buffer does not produce quality renders, thanks for the help though, i hope some else finds a solution to this mystery

tx

Z

[ZayneoO0]

great will give it a try

[hkspowers]

Solution is to just make a fresh scene. Yours is corrupted somehow, luckily your scene is pretty basic so should only take a few minutes to set up a new one. I set one up with your hearts fresh and it rendered in maya hardware perfectly ppAttrs and all.:beer:

EDIT: We seem to be on a slight posting delay haha

[ZayneoO0]

YAY! finally got it working thanks so much ! built the scene exactly the same and now it works, funny how a file can just get corrupted like that !?

:thumbsup:

thanks so much

maybe some day i can help you out

cheers

[ZayneoO0]

i have a feeling that it was the bend deformer i had on the particles which was causing the problems, because as soon as i try to apply the bend again , i get similar problems

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