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Question by nonaxanon · Oct 29, 2014 at 11:24 PM · particlesparticlesystemparticleparticle-systemcollision-detection

shuirken particle system and colliders2d

hi , ive read around that it is not possible to detect collisions from particlesystem (shuriken) with colliders2d, i was wondering if it is posible to use something like collider2D.bounds.Contains, and detect if this collider2d, contains a position of any of the particles generated by the particlesystem. any help is appreciated ty

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avatar image AlwaysSunny · Oct 29, 2014 at 11:22 PM 0
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I don't see why not. Use GetParticles() to grab the particle array and loop over it to check against the bounds. Alternatively, have a 3D box collider in addition to the 2D collider, specifically for this purpose. Frankly that'd probably be more performant than rolling your own collision response system.

avatar image nonaxanon · Oct 29, 2014 at 11:25 PM 0
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i have some code but the list is not being filled, its as follows

         ParticleList = new  ParticleSystem.Particle[particlesys.particleCount];
         particlesys.GetParticles(ParticleList);
         Debug.Log(ParticleList.Length);
         for(int i = 0; i < ParticleList.Length; ++i)
         {
             Debug.Log(ParticleList);
             if(collider2D.bounds.Contains(ParticleList[i].position))
             {
                 Debug.Log("go crazy);
             }
         }  

avatar image AlwaysSunny · Oct 29, 2014 at 11:28 PM 0
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So line 3's Debug prints zero? This code looks alright to me, except line 6 which wants to log the array itself.

avatar image nonaxanon · Oct 29, 2014 at 11:29 PM 0
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exactly , prints 0 nothing in array so the for loop never does anything

avatar image AlwaysSunny · Oct 29, 2014 at 11:30 PM 0
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Are you quite sure the particle system is the correct reference? Try printing particlesys.particleCount and ensure it's non-zero.

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