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|ID||Project||Category||View Status||Date Submitted||Last Update|
|0006682||opensim||[REGION] Physics Engines||public||2013-06-16 11:46||2013-06-17 14:21|
|Assigned To||Robert Adams|
|Platform||Windows||OS||Windows 64bits||OS Version||7|
|Product Version||master (dev code)|
|Target Version||Fixed in Version|
|Summary||0006682: Bank angle|
|Description||With bulletSim, when a motorboat turns, the pitch angle is aberrant.|
The front of the boat sinks too much into the water, on the port or starboard side.
|Additional Information||However, the boat's return to its equilibrium position is totally perfect (very realistic)|
|Tags||No tags attached.|
|Git Revision or version number||0.7.6_694c4bc|
|Run Mode||Standalone (1 Region)|
|Environment||.NET / Windows64|
|Viewer||Singularity and others|
|Attached Files||pitch_angle.rar [^] (296,902 bytes) 2013-06-16 18:34|
Robert Adams (administrator)
I had noticed the same thing -- boats tend to pitch forward into the water when turning. VerticalAttraction parameter is the same for X and Y axis so they cannot be modified separately. For a short term fix, decreasing the Y angular friction timescale might lessen some of the tipping.
The script will be a help. There must be some Y angular forces being applied when turning/banking occurs.
edited on: 2013-06-17 16:52
What I find of note is that you are applying a Z rotation when you turn. That is the cause of your problem in this case. you are tipping the boat on its side and then rotating it slightly while you are turning causing one corner of the boat to sink into the ground. The reason secondlife does not do this could be 1 of three or all of the options, 1. secondlife is applying all Z rotation to the world axis when banking is activated. 2 Second Life is ignoring all user applied Z rotation while banking is activated. 3. The angular deflector, which is not active right now in BulletSim, is stabilizing the tip of your boat.
Bulletsim right now when banking is only applying Z force to the world axis but is letting you apply your own force to the vehicle axis. This needs to be fixed, possible other changes has messed up the banking fudge and it needs to be readjusted so that banking will turn you again.
This applying more force to Z while banking in Second Life is just for piece of mind. In 99% of cases the banking alone will turn the vehicle as fast as it is allowed to turn and this extra force is just being ignored.
|2013-06-16 11:46||wiwi||New Issue|
|2013-06-16 11:46||wiwi||File Added: bank_angle.rar|
|2013-06-16 17:34||wiwi||Git Revision or version number||=> 0.7.6_694c4bc|
|2013-06-16 17:34||wiwi||Environment||Mono / Windows => .NET / Windows64|
|2013-06-16 17:34||wiwi||OS||Windows seven => Windows 64bits|
|2013-06-16 17:34||wiwi||OS Version||=> 7|
|2013-06-16 17:45||wiwi||File Deleted: bank_angle.rar|
|2013-06-16 17:46||wiwi||File Added: bank_angle.rar|
|2013-06-16 18:33||wiwi||File Deleted: bank_angle.rar|
|2013-06-16 18:34||wiwi||Description Updated||View Revisions|
|2013-06-16 18:34||wiwi||File Added: pitch_angle.rar|
|2013-06-16 20:09||Robert Adams||Assigned To||=> Robert Adams|
|2013-06-16 20:09||Robert Adams||Status||new => assigned|
|2013-06-16 22:07||Robert Adams||Note Added: 0024103|
|2013-06-17 14:21||vegaslon||Note Added: 0024105|
|2013-06-17 16:52||vegaslon||Note Edited: 0024105||View Revisions|
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