Open Dynamics Engine / Patches / #185 Stable, implicit gyroscopic forces

#185 Stable, implicit gyroscopic forces

Milestone: In_STABLE

Status: closed

Owner: Daniel K. O.

Labels: gyroscopic (1)

Priority: 5

Updated: 2014-02-04

Created: 2013-01-11

Creator: Joseph Cooper

Private: No

Removes a problem where any body with a mass matrix with unequal principal axes gains energy when rotating with gyroscopicMode set to true (the default).

Changes the computation of gyroscopic torques in step.cpp and quickstep.cpp to use an implicit computation. This is more computational expensive, but usable. The other method is not usable for freely rotating bodies. When the inertia matrix has equal principal axes, the gyroscopic computation does nothing; so it might as well be disabled to save cycles.

See video: www.youtube.com/watch?v=RHqyKfxWNpY

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implicit_gyro.patch

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Joseph Cooper - 2013-01-14

New patch. The old one broke the .c interface.

implicit_gyro.patch

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Daniel K. O. - 2014-02-01

status: open --> accepted

assigned_to: Daniel K. O.

Group: Needs_Feedback --> In_STABLE
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Daniel K. O. - 2014-02-01

Applied on rev #1957.

I tested on various mass distributions, and it seems fairly robust.

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Daniel K. O. - 2014-02-04

status: accepted --> closed
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Stable, implicit gyroscopic forces

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#185 Stable, implicit gyroscopic forces

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