IhabAli Posted May 8, 2019 Share Posted May 8, 2019 Hi, Struggling a bit to understand what's going on with quaternions and rotations but I'm basically trying to get a particle to point at its direction of motion in general but to constantly rotate around a certain predefined local axis. In the attached example I'm establishing orientation based on the velocity and setting up constant rotation relative to an object's coordinate system. All seems fine until the particle changes velocity using the pop wind. Not sure what's happening with rotations at this point, it seems to be working but things seem to jump abruptly at certain points. I'm guessing this has to do with matrix rotations but I'm not sure I fully understand the issue or how to fix it. particledirection.hipnc Quote Link to comment Share on other sites More sharing options...
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