Hello people, I was investigating some physical avatar behavior with ODE and managed to fix the avatar capsule tilt that causes Mantis #2905 to occur and also causes other inconsistency in avatar movement (e.g. sometimes not being able to pass through thin passages). However, I noticed that the fixing the capsule tilt seems to cause the avatar to sink into the terrain if the slope is steep. I suspect that there may be some "fudge factors" in the physics code that were tuned to work with the leaning capsule which may need to be re-tuned, but I am not sure at this point.
Removing the capsule tilt results in a consistently-behaving, straight-upright capsule. Even though this behavior is on the whole preferable, it may cause some hiccups for anything that was tuned to work with the old leaning avatar capsule. I was planning on going ahead and committing this patch. To avoid breaking anything that depends on the current behavior I will add an option to OpenSim.ini in the [ODEPhysicsSettings] section, something like "av_capsule_tilted = true" as the default with no change in behavior, and "false" as the corrected but not yet thoroughly verified mode. If no problems arise, we can later change "false" to the default. Any objections? Thanks, N Lin (nlin)
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