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1. • CommentAuthorben
   • CommentTimeNov 27th 2011

    
   I'd like to make an effect that is similar to moths hovering around a light. The moths need to stay alive, so we can't generate and eliminate them.
   
   We need to have a lot of particles on screen, probably 40+ lanterns, each with up to 40 particles around them
   
   An acceptable approximation would be an elastic bounding box.
   
   The particles will be on screen for a long time, so a gravity well that they would get sucked into would be a problem.
2. • CommentAuthorRichard
   • CommentTimeOct 29th 2012

    
   How about a gravity well at the centre of a collision zone, perhaps with a disc zone, so they are attracted towards the gravity well but bounce off the collision zone before they fall into the well.