Overriding only some of the particle system's properties when emitting

Unity Engine
1

I want to emit particles (basically spawn them at specific position / rotation) by using EmitParams, but keep initial particle system’s speed, velocity other properties etc.

Is there a way to do that? Or do I need to extract all properties from the particle system and then re-feed them via EmitParams?

2

Anything not set in the EmitParams struct retains the default setting.

It is also described here: Unity - Scripting API: ParticleSystem.Emit

1 Like
3

Okay, but it still doesn’t look right.

I’m doing this:

         ParticleSystem.EmitParams emitParams = new ParticleSystem.EmitParams();
         emitParams.applyShapeToPosition = true;
         emitParams.position = position;
      
         if (overrideRotation) emitParams.rotation3D = rotation;
      
         foreach (ParticleSystem system in _ps) {
            system.Emit(emitParams, particleCount);
         }

I need to specify world position of the emitter, not the particle itself somehow. Basically simulate placing particle system at world position.

If I override the rotation3D - it overrides the particle rotation, not the rotation of the emitter itself.

Is it still neccessary to place that system’s transform at position / rotation in order to achieve that?

Edit: Yeah, it seems to be the case.

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4

There is an alternative: set the transform within the shape module instead, prior to calling Emit.

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