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Question by simeonradivoev · May 22, 2012 at 07:57 PM · velocitypathparticlecircle

A particle's velocity to an arch

I have created a ParticleSystem that spawns one particle every second, and that particle has a sub emission of another particle system, witch create a sort of a trail. My problem is how can I change the velocity of the main particle so that it goes in the direction that originally comes from, in a circle. Here is a picture of what I want to do:

alt text

The green line shows how i want the particle to travel, like a Sun eruption.

I maneged to find how to edit the particles but how can I make a path like that?

     function LateUpdate(){
     particlesCount = ParticleObject.GetParticles(Particles);
     var i:int = 0;
     
     while(i <particlesCount){
         Particles[i].velocity =;
         i++;
     }
     
     ParticleObject.SetParticles(Particles,particlesCount);
 
 }

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Answer by Owen-Reynolds · May 23, 2012 at 01:34 PM

To have it get "pulled" back into the sun, compute the direction to the sun, and give a little push that way:

 Vector3 sundir = (sun.position - P[i].position).normalized;
 P[i].velocity += sundir*Time.deltaTime*10; // 10 is the "pull" of the sun

This same code works for homing missiles.

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