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c#unity-game-engineparticle-system

(unity)Is there a way to set the position of every particle in a particle system?


So i want to make like an aura around the player, like in warcraft 3 or path of exile, etc, using a particle system, and when the character is idle it works perfectly fine. Thing is when it isnt idle.

I've tried changing the particle system position itself using Update(), but that doesnt really affect the position of the particles. What i need is to set each one of them to the players position.

Is there a way to set the particles to the position of the player?(or any position at all)

Thanks


Solution

  • To answer your problem

    You can change the ParticleSystem.simulationSpace

    Controls whether particles are animated in the parent object’s local space (therefore moving with the parent object), in the world space, or relative to a custom object (moving with a custom object of your choosing).

    to ParticleSystemSimulationSpace.Local

    Simulate particles in local space

    Either via the Inspector of the Main Module

    enter image description here

    or via code like

    GetComponent<ParticleSystem>().main.simulationSpace = ParticleSystemSimulationSpace.Local;
    

    To answer your question title

    Yes. You can get the particles via ParticleSystem.GetParticles, change their ParticleSystem.Particle.position and then write them back into the system using ParticleSystem.SetParticles

    var particles = new ParticleSystem.Particle[theParticleSystem.main.maxParticles];
    var currentAmount = theParticleSystem.GetParticles(particles)
    
    // Change only the particles that are alive
    for (int i = 0; i < currentAmount; i++)
    {
        particles[i].position = XYZ;
    }
    
    // Apply the particle changes to the Particle System
    theParticleSystem.SetParticles(particles, currentAmount);