Turn On Particles Function In A Linked Prim

[joeyblueyes]

I am trying to turn on and off particles in a linked prim!

I have my "StartFireParticles ()" function in one prim and want to control it from another prim.....

Can't figure out how to call this function from the linked prim!

Any help is appreciated.... Thanks!

[Emma Krokus]

Read here:

LlParticleSystem - Second Life Wiki

a quick example of the llLinkParticleSystem function in a rootprim but targetting another prim to emit the particles -

where the 2 after llLinkParticleSystem is the link number of the prim you want to emit the particles- :

 

llLinkParticleSystem(2, [
        PSYS_PART_FLAGS,       PSYS_PART_WIND_MASK | PSYS_PART_EMISSIVE_MASK,
        PSYS_SRC_PATTERN,      PSYS_SRC_PATTERN_EXPLODE, 
        PSYS_PART_START_COLOR, <1.0, 0.0, 0.0>
    ] );

[joeyblueyes]

51 minutes ago, Emma Krokus said:

Read here:

LlParticleSystem - Second Life Wiki

a quick example of the llLinkParticleSystem function in a rootprim but targetting another prim to emit the particles -

where the 2 after llLinkParticleSystem is the link number of the prim you want to emit the particles- :

 

llLinkParticleSystem(2, [
        PSYS_PART_FLAGS,       PSYS_PART_WIND_MASK | PSYS_PART_EMISSIVE_MASK,
        PSYS_SRC_PATTERN,      PSYS_SRC_PATTERN_EXPLODE, 
        PSYS_PART_START_COLOR, <1.0, 0.0, 0.0>
    ] );

Thanks for that reply, Emma!  

Since my particle script is in the prim where the particles will come from, is it possible to just call my function .....StartFireParticles ()... from another prim??

Something like this??

llLinkParticleSystem( 2,  [ updateParticles() ] );

[Fenix Eldritch]

Yes, that's the main purpose of the "linked" variants of functions: the ability to make them target a different prim in the linkset instead of just the prim that the script itself is in.

This of course depends on you knowing the link number of the prim you wish to target. There are many ways to do this, but a quick method is to use the example from the llDetectedLinkNumber wiki page. The script there will report the link number of the prim you click on. Give it a try.

[Emma Krokus]

you'll define the particles parameters and the link number of the target prim for the particles in your updateParticles() user defined function (UDF) - example here:

updateParticles() //this is the "trigger name" for your function
{ llLinkParticleSystem(2, [ PSYS_PART_FLAGS, PSYS_PART_WIND_MASK | PSYS_PART_EMISSIVE_MASK, PSYS_SRC_PATTERN, PSYS_SRC_PATTERN_EXPLODE, PSYS_PART_START_COLOR, <1.0, 0.0, 0.0> ] );

then in your script event (state_entry, touch, collision whatever), you'll simply need to state the name of the UDF - e.g.

state_entry()

{

updateParticles(); //your function's "trigger name" stated as a command to run the UDF

}

Edited May 18, 2023 by Emma Krokus

[joeyblueyes]

Thanks Fenix,

I do have the prim number!  Just trying to figure out how to call the function for my particle script?

Tried:

llLinkParticleSystem( 2,  [ StartFireParticles () ] );

But I get a "name not defined" error

[joeyblueyes]

3 hours ago, Emma Krokus said:

Read here:

LlParticleSystem - Second Life Wiki

a quick example of the llLinkParticleSystem function in a rootprim but targetting another prim to emit the particles -

where the 2 after llLinkParticleSystem is the link number of the prim you want to emit the particles- :

 

llLinkParticleSystem(2, [
        PSYS_PART_FLAGS,       PSYS_PART_WIND_MASK | PSYS_PART_EMISSIVE_MASK,
        PSYS_SRC_PATTERN,      PSYS_SRC_PATTERN_EXPLODE, 
        PSYS_PART_START_COLOR, <1.0, 0.0, 0.0>
    ] );

Thanks again Emma,

I do understand that.  My particle script is a lot and was just hoping to call it from another prim with just the function call....

Maybe I'm just not explaining it right....

 

[Fenix Eldritch]

54 minutes ago, joeyblueyes said:

llLinkParticleSystem( 2,  [ StartFireParticles () ] );

But I get a "name not defined" error

Seems I missed the last portion of your previous post. That code probably isn't working because "StartFireParticles ()", is not the correct way to call a function - the space between the function and the () is the issue. But also, unless StartFireParticles() returns a list, that probably isn't going to do what you want either.

46 minutes ago, joeyblueyes said:

My particle script is a lot and was just hoping to call it from another prim with just the function call....

You cannot call user defined functions that exist in other scripts - a script only knows about what is within itself. You could have it be triggered via chat commands, either from yourself, or another script - but then you'd need to alter the particle script to support listening for said chat commands.

Edited May 18, 2023 by Fenix Eldritch

[joeyblueyes]

Well I did get it to work!  I moved the particle code into the main script, so it was easy from there!

Thanks again Emma & Fenix for your help and suggestions....