Change the size of particle

Forums Technical Discussion Change the size of particle

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croleo: Member; 19 posts; Joined: Feb. 2015; Offline

March 26, 2015 7:16 a.m.

Hi, everybody!

I try to made a drop trail.
I use a particle, attached with the node “trail” and i want the particles of the trail, become small as the particle's age.

I just succeeded to scale all the particles at the same time.

Someone can give me some advice ?

Thanks.

Attachments:
RnD_Droplet_001_test01.hip (75.5 KB)


ben-andersen: Member; 47 posts; Joined: Jan. 2014; Offline

March 26, 2015 9:50 a.m.

You can use a Point VOP to do per-point modifications like that.

In the Point VOP, divide age by life, plug that into a fit, and then plug that into a bind export node set to pscale.

I can't put together an example right now, but I can put one together in a bit if that's not clear enough.


croleo: Member; 19 posts; Joined: Feb. 2015; Offline

March 26, 2015 9:53 a.m.

thanks,

yes, please if you can put one, it'll be cool.


croleo: Member; 19 posts; Joined: Feb. 2015; Offline

March 26, 2015 11:57 a.m.

I test with the Point VOP, i put it after the node “trail”…but it doesn't work….i put the node that you say, the spheres are vanished


Sadjad Rabiee: Member; 1391 posts; Joined: Dec. 2010; Offline

March 26, 2015 12:07 p.m.

I checked your project , You can't use this solution , because some of your point's are overlapped !

You can achieve to trail effect with another methods such as using Old-POP Network.

Also you can use Ramp Parameter for controlling particle's size along your trail , it's more handy 8)

https://www.youtube.com/c/sadjadrabiee [www.youtube.com]
Rabiee.Sadjad@Gmail.Com


Sadjad Rabiee: Member; 1391 posts; Joined: Dec. 2010; Offline

March 26, 2015 12:08 p.m.

Just check this project :wink:

Attachments:
JK_POP_Size.hip (164.1 KB)

https://www.youtube.com/c/sadjadrabiee [www.youtube.com]
Rabiee.Sadjad@Gmail.Com


Sadjad Rabiee: Member; 1391 posts; Joined: Dec. 2010; Offline

March 26, 2015 12:10 p.m.

I made two different project for you , some of they is a little complex , But I think it's interesting.

https://www.youtube.com/c/sadjadrabiee [www.youtube.com]
Rabiee.Sadjad@Gmail.Com


croleo: Member; 19 posts; Joined: Feb. 2015; Offline

March 26, 2015 12:16 p.m.

Oh nice! thanks you very much! I check this!

In my final project, i want create any particle to flow on the mesh's surface.


Sadjad Rabiee: Member; 1391 posts; Joined: Dec. 2010; Offline

March 26, 2015 12:20 p.m.

If you wanna flow particles from surface of the Sphere instead of it's points , just append a Scatter SOP after Sphere SOP :wink:

https://www.youtube.com/c/sadjadrabiee [www.youtube.com]
Rabiee.Sadjad@Gmail.Com


croleo: Member; 19 posts; Joined: Feb. 2015; Offline

March 26, 2015 12:27 p.m.

thanks for your advice,
For flow the particles on surface, i use the node “Ray”, i plug the particle and the geo, it work perfectly


Sadjad Rabiee: Member; 1391 posts; Joined: Dec. 2010; Offline

March 26, 2015 12:42 p.m.

croleo
thanks for your advice,
For flow the particles on surface, i use the node “Ray”, i plug the particle and the geo, it work perfectly

Sorry , I misunderstand your goal :roll:

Yes , Using Ray SOP is a good choice :wink:

https://www.youtube.com/c/sadjadrabiee [www.youtube.com]
Rabiee.Sadjad@Gmail.Com


croleo: Member; 19 posts; Joined: Feb. 2015; Offline

March 27, 2015 6:16 a.m.

No problem!

It work perfectly, thanks you very much!

I wonder if you know how to the particles follow a curve and flow on the surface at the same time?


sl0throp: Member; 258 posts; Joined:; Offline

March 27, 2015 10:30 a.m.

Ray the emitter curve on the surface before it goes to the pop network?

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