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JackBrownMotion

Emit on Specific Frames

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Hi Everyone,

 

 First post on here, so please go easy on me!

 

I'm trying to set up an emitter that emits its particles on specific, designated frames.

 

I have an emitter set up as 'Pulse', but I cant get the offsets to behave properly.

 

For example, I'd like to specify that my emitter emits on frames 5,12,25,100.

 

Is there a way of doing this?

 

Thanks 

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There's no simple way to do this in the emitter itself, but it can be done with a bit of Xpresso. In the emitter, set Emission to Trigger and turn off the Pull Trigger switch. All you need to do then is have a little bit of Xpresso turn that switch on when you want to emit particles. In the screenshot, the Compare node simply compares the current time to 1 second (frame 30 on my system) and pulls the trigger when that time arrives, so you get a single shot at that frame. The scene is just an emitter with an Xpresso tag on it.

Your Xpresso would be a little more complex because you want to emit on more than one frame, but you get the idea.

Hope that helps,

Steve

2019-11-15_12-53-57.jpg.a50363e8486e9345e08f597ecb4aca67.jpg

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Hi Steve,

 

 Thanks for your reply - I was starting to wonder if it was possible at all!

 

I'm a bit of an Xpresso novice - For me to build this myself, does the Xpresso tag go on the Emitter?

 

Thanks

 

 

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Sorry - Me again!

 

I've got a basic setup working where I keframe the Input 2 value on the Compare node.

 

This gives me the control I need, but I was wondering if you had an alternative way of doing things, just in case I was missing something.

 

Thanks though - This setup is doing the trick for now!

 

Jack

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