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I am currently trying to drive the particle count of various instances of an object (containing a particleSystem) dynamically for each instance.

I'm using a loop subprogram with an Object Attribute Output node.

The one thing I can't seem to get right is how to point to the particle count in the Attribute Output node.

What I need is basically a one-line version of this:

bpy.data.objects['Plane'].modifiers['ParticleSystem 1']
bpy.data.particles['ParticleSettings'].count = value

Any help would be much appreciated.

Update with Node-Setup:

enter image description here

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2 Answers 2

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The full python line to read that setting is:

bpy.data.objects['Plane'].particle_systems['ParticleSystem'].settings.count

According to the Animation Nodes documentation the attribute field of the Object Attribute Output node is relative to the object which would mean you would use:

particle_systems['ParticleSystem'].settings.count

or alternatively:

modifiers['ParticleSystem'].particle_system.settings.count

Whether this actually works is dependant on how the developer wrote the Animation Nodes addon.

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  • $\begingroup$ Thank you! Sadly it didn't work. "Attribute not found" I updated my post with the node setup. $\endgroup$
    – michaelh
    May 24, 2016 at 21:53
  • $\begingroup$ Interestingly this doesn't produce an error within the node. But all nodes objects still have identical particle counts. In this thread [link]blender.stackexchange.com/questions/45985/… the author of the addon used modifiers["Array"].count $\endgroup$
    – michaelh
    May 24, 2016 at 22:20
  • $\begingroup$ Can you elaborate on that? $\endgroup$
    – Todd McIntosh
    May 24, 2016 at 22:22
  • $\begingroup$ You are replacing the 'ParticleSystem' string with the actual value in use correct? $\endgroup$
    – Todd McIntosh
    May 24, 2016 at 22:22
  • $\begingroup$ sorry, I hit "Enter" a little too early - still have to get used to that. - Yes, I tried it with "ParticleSystem 1" which is the actual name. I also tried modifiers['ParticleSystem 1'].settings.count which also returns an error. $\endgroup$
    – michaelh
    May 24, 2016 at 22:26
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after some research and tests this code works for me:

modifiers["name"].particle_system.settings.count

where "name" is the text string used in the modifiers tab

IMPORTANT You must set an input in the value slot otherwise it gives an error "Value has a wrong type"

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