Andrew Linden added a comment - 19/Oct/07 09:19 AM

Andrew Linden added a comment - 19/Oct/07 09:19 AM Yes, there were some new parts of the vehicle code (for making Havok4 ground vehicles behave more like Havok1 ground vehicles) that was not using the VEHICLE_REFERENCE_FRAME feature at all yet – they now do. Also, there was a bug where some old Havok::Quaternion math was converted to use LLQuaternions, but the developer who did it did not know that the LL quaternions operate from the other direction. That is hkQ_AC = hkQ_BC * hkQ_AB but LLQ_AC = LLQ_AB * LLQ_BC, so a quaternion transformation was in the wrong order. Finally, I discovered that the VEHICLE_ANGULAR_FRICTION feature has never been using the VEHICLE_REFERECE_FRAME properly Most vehicles don't use this feature very much, and the problem would only show up well if the eigen values of the vehicle's inertia tensor were very divergent – which is probably why no one ever complained; the percentage of vehcles affected by this problem is probably a tiny fraction of 1%.

Torley Linden added a comment - 21/Dec/07 12:06 PM

Torley Linden added a comment - 21/Dec/07 12:06 PM ========- Changed status to "Fixed" – I'm going through the Issue Tracker and updating issues that've been publicly fixed! ========-