Change the size of particle

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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)

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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.
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thanks,

yes, please if you can put one, it'll be cool.
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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
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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
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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
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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
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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.
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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
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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
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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
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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?
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Ray the emitter curve on the surface before it goes to the pop network?
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