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Question by Reverend-Speed · Jun 08, 2017 at 07:28 PM · colorparticlesystemparticle systemcolor changeparticle-system

How do I change Particle System color via script in Unity 5.6.1f1?

At the moment I'm using an infrequent particle burst to both identify the viewcone and status of a creature. I'd like to change the colour (or starting colour) of the particle system - however, recent changes to the particle system code has made this process somewhat baffling to an intermediate programmer such as myself.

After a certain amount of research and trying to parse pages such as these, I've ended up with sample code like the following...

 var ma = refs.visViewCone.main.startColor.color;     // Awkwardly, apparently I need to create a reference to the ParticleSystem.Main within local scope. Guh.
 
         switch (mind.goal)
         {
             case Goal.standby:
                 ma = eyeCol.standbyWhite;
                 break;
         {

I'll be honest, this isn't helping - instead, it throws up the following error:

 NullReferenceException: Do not create your own module instances, get them from a ParticleSystem instance

Really frustrating. Neither realtime lights (too expensive) nor projectors (too unpredictable, shines through walls) seemed suited to the task, but now Particle Systems seem to have mutated into a mash of weird structs and unwritable variables and module instances...

Can anybody help? Would really appreciate it.

--Rev

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Answer by ifurkend · Jun 08, 2017 at 09:40 PM

ParticleSystem ps = GetComponent();

ParticleSystem.MainModule ma = ps.main;

ma.startColor = new color...

ref: https://docs.unity3d.com/ScriptReference/ParticleSystem.MainModule-startColor.html

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avatar image Reverend-Speed · Jun 11, 2017 at 10:39 PM 0
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Perfect, thanks. Annoyed I didn't find those docs. --Rev

avatar image ifurkend Reverend-Speed · Jun 14, 2017 at 04:55 AM 0
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You can simply google with the keyword: "unity api (specific subject of your issue like 'particlesystem color')". Sadly not all documents of function provide sample codes.

avatar image Reverend-Speed ifurkend · Jun 14, 2017 at 10:32 AM 0
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In my defense, I did a fair bit of rummaging around trying to find an answer to my problem, but can't argue with results - I'll lead with those search terms in future. Thank you! --Rev

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