Comments on: Basic Flocking http://www.dncompute.com/blog/2008/09/08/basic-flocking.html Personal blog for technologist Noel Billig Sat, 28 Aug 2010 17:15:48 +0000 hourly 1 http://wordpress.org/?v=3.0.1 By: Mike http://www.dncompute.com/blog/2008/09/08/basic-flocking.html/comment-page-1#comment-77196 Mike Thu, 01 Jan 2009 07:07:45 +0000 http://www.dncompute.com/blog/?p=123#comment-77196 Very cool emergent behavior example. In your "alignment" algorithm, is there account taken for the magnitude of the neighboring particle velocities? I notice that when in "flock" mode, the sprites tend to fly off in extreme directions when encountering a cluster of neighboring sprites. Doesn't happen when the particles are all traveling in the same direction (towards a target), but when they all get to the target, they begin to exhibit more and more separatist behavior. Could this because particles are accounting for the direction but -not- magnitude of their neighbors? I wonder how the simulation might change if you allowed particles to know how fast their neighbors were traveling... Very cool emergent behavior example.

In your “alignment” algorithm, is there account taken for the magnitude of the neighboring particle velocities? I notice that when in “flock” mode, the sprites tend to fly off in extreme directions when encountering a cluster of neighboring sprites.

Doesn’t happen when the particles are all traveling in the same direction (towards a target), but when they all get to the target, they begin to exhibit more and more separatist behavior. Could this because particles are accounting for the direction but -not- magnitude of their neighbors? I wonder how the simulation might change if you allowed particles to know how fast their neighbors were traveling…

]]> By: Steven Baughman http://www.dncompute.com/blog/2008/09/08/basic-flocking.html/comment-page-1#comment-75248 Steven Baughman Fri, 07 Nov 2008 21:58:24 +0000 http://www.dncompute.com/blog/?p=123#comment-75248 I am such a sucker for this stuff. Very cool. I am such a sucker for this stuff. Very cool.

]]> By: Noel http://www.dncompute.com/blog/2008/09/08/basic-flocking.html/comment-page-1#comment-69547 Noel Tue, 23 Sep 2008 15:23:49 +0000 http://www.dncompute.com/blog/?p=123#comment-69547 @dave - Flocking behaviors are not particularly difficult to implement, but if you have no experience with vector math and switching between polar and Cartesian coordinates, you might not have the foundation to work upon. I would highly recommend researching those topics first, as adding flocking behavior to a 2d motion system is relatively easy. One important concept to keep in mind is that you can use the dot product of vectors to figure out the angle between them. This is important when determining what direction to steer your agents in. @dave – Flocking behaviors are not particularly difficult to implement, but if you have no experience with vector math and switching between polar and Cartesian coordinates, you might not have the foundation to work upon. I would highly recommend researching those topics first, as adding flocking behavior to a 2d motion system is relatively easy. One important concept to keep in mind is that you can use the dot product of vectors to figure out the angle between them. This is important when determining what direction to steer your agents in.

]]> By: daniel http://www.dncompute.com/blog/2008/09/08/basic-flocking.html/comment-page-1#comment-68078 daniel Wed, 17 Sep 2008 06:13:58 +0000 http://www.dncompute.com/blog/?p=123#comment-68078 "any hints or tips on how to code this?" um yes, right here: http://www.red3d.com/cwr/boids/ I was building a bit of a flocking behaviour for some fish some time ago an Id the boids were a great place to start. I wasn't smart enough to apply different paradigms and the ability to switch between them. This paper "Context-Dependent Adaptability in Crowd Behavior Simulation" (http://ieeexplore.ieee.org/xpl/freeabs_all.jsp?arnumber=4018492), however, does a pretty good job of explaining how to take this a bit further. (and make it context dependent) The thing that I found the most useful, was the use of excitation values and the way they were calculated. “any hints or tips on how to code this?” um yes, right here: http://www.red3d.com/cwr/boids/

I was building a bit of a flocking behaviour for some fish some time ago an Id the boids were a great place to start. I wasn’t smart enough to apply different paradigms and the ability to switch between them. This paper “Context-Dependent Adaptability in Crowd Behavior Simulation” (http://ieeexplore.ieee.org/xpl/freeabs_all.jsp?arnumber=4018492), however, does a pretty good job of explaining how to take this a bit further. (and make it context dependent)

The thing that I found the most useful, was the use of excitation values and the way they were calculated.

]]> By: dave http://www.dncompute.com/blog/2008/09/08/basic-flocking.html/comment-page-1#comment-67093 dave Tue, 09 Sep 2008 21:19:41 +0000 http://www.dncompute.com/blog/?p=123#comment-67093 this looks great, an chance of any hints or tips on how to code this? this looks great, an chance of any hints or tips on how to code this?

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