Flint Particle System Forum - GravityWell Epsilon Mon, 12 Dec 2011 22:30:49 +0000 http://flintparticles.org/forum/ Lussumo Vanilla 1.1.10 & Feed Publisher GravityWell Epsilon http://flintparticles.org/forum/comments.php?DiscussionID=387&Focus=1306#Comment_1306 http://flintparticles.org/forum/comments.php?DiscussionID=387&Focus=1306#Comment_1306 Sat, 21 Aug 2010 20:05:11 +0100 Ubuntu The gravitywell class explains it as:
The minimum distance for which gravity is calculated.
* Particles closer than this distance experience a gravity force as if
* they were this distance away. This stops the gravity effect blowing
* up as distances get small. For realistic gravity effects you will want
* a small epsilon ( ~1 ), but for stable visual effects a larger
* epsilon (~100) is often better.
It seems to me that a low epsilon causes particles to speed up and rotate more as they approach the gravitywell center. While a high epsilon causes less of this speed up and less rotation towards the center. I just need an easier to understand description of what epsilon is. ]]>
GravityWell Epsilon http://flintparticles.org/forum/comments.php?DiscussionID=387&Focus=1308#Comment_1308 http://flintparticles.org/forum/comments.php?DiscussionID=387&Focus=1308#Comment_1308 Wed, 25 Aug 2010 08:41:09 +0100 Richard
The epsilon specifies a distance from the center of the gravity well. When particles are further away than this distance, they respond to the gravity in the normal way. The epsilon will have no effect on these particles.

When particles are closer than this epsilon distance, however, the acceleration on the particles is limited to the acceleration that would be experienced at distance epsilon so the particles don't accelerate at massive rates and cause instability. ]]>
GravityWell Epsilon http://flintparticles.org/forum/comments.php?DiscussionID=387&Focus=1310#Comment_1310 http://flintparticles.org/forum/comments.php?DiscussionID=387&Focus=1310#Comment_1310 Fri, 27 Aug 2010 19:33:50 +0100 Ubuntu