Discontinuity (Euler) Filter needs a bit of help #47554

New Issue

Emily Amadhia Albee · 2016-02-24T18:22:18+01:00

2016-02-24 18:22:18 +01:00

System Information
Windows 7 Professional
NVIDIA 960

Blender Version
Broken: 2.76b

Short description of error
"Discontinuity (Euler) Filter" yields a result that still has discontinuity that in some discontinuous areas requires resultant sections of keyframe values to be inverted (in value over 0) before being manually re-positioned in value (offset in increments of 180 degrees) before actual continuity is achieved.

Exact steps for others to reproduce the error
Running the "Discontinuity (Euler) Filter" on the "DiscontinuousEulers_Before.blend"DiscontinuousEulers_Before.blend file (attached) yields "DiscontinuousEulerFilter_Applied.blend" DiscontinuousEulerFilter_Applied.blend file (attached)

*Long description of error
Working with mocap data that has been "baked across" between riggings with World coordinates yielded the "DiscontinuousEulers_Before.blend" on a character's hand. (Actor was dancing intensely)

(It seems like Axis Flipping occurred whenever any axis crossed a 90 degree mark?)

Applied "Discontinuity (Euler) Filter" on XYZ rotations to yield "DiscontinuousEulerFIlter_Applied.blend"

"Discontinuity (Euler) Filter" looks like it does a great start at untangling discontinuous Eulers, but needs to be "plussed" to watch for sections of keys that jump in increments of 180 degrees from one frame to the following frame that need to be raised or lowered to link up to preceeding keys... ...and to watch for sections of keys that jump in increments of 90 degrees from one frame to the following frame that I've seen indicate a section of keys that need to be inverted (eg: "Mirror by Values over Value ___") in value before they can be shifted-in-value in 180 degree increments to yield continuous Euler curves. (eg: Frames 407-432 in "DiscontinuousEulerFIlter_Applied.blend", which must have the X and Z values in that range shifted in value by -180... but the Y VALUES be Key > Mirror > By Values over Value = 0, before having their values shifted by -180 before the curves in that section link up with preceeding keys and also yield the original action.)

**System Information** Windows 7 Professional NVIDIA 960 **Blender Version** Broken: 2.76b **Short description of error** "Discontinuity (Euler) Filter" yields a result that still has discontinuity that in some discontinuous areas requires resultant sections of keyframe values to be inverted (in value over 0) before being manually re-positioned in value (offset in increments of 180 degrees) before actual continuity is achieved. **Exact steps for others to reproduce the error** Running the "Discontinuity (Euler) Filter" on the "DiscontinuousEulers_Before.blend"[DiscontinuousEulers_Before.blend](https://archive.blender.org/developer/F285715/DiscontinuousEulers_Before.blend) file (attached) yields "DiscontinuousEulerFilter_Applied.blend" [DiscontinuousEulerFilter_Applied.blend](https://archive.blender.org/developer/F285716/DiscontinuousEulerFilter_Applied.blend) file (attached) **Long description of error* Working with mocap data that has been "baked across" between riggings with World coordinates yielded the "DiscontinuousEulers_Before.blend" on a character's hand. (Actor was dancing intensely) (It seems like Axis Flipping occurred whenever any axis crossed a 90 degree mark?) Applied "Discontinuity (Euler) Filter" on XYZ rotations to yield "DiscontinuousEulerFIlter_Applied.blend" "Discontinuity (Euler) Filter" looks like it does a great start at untangling discontinuous Eulers, but needs to be "plussed" to watch for sections of keys that jump in increments of 180 degrees from one frame to the following frame that need to be raised or lowered to link up to preceeding keys... ...and to watch for sections of keys that jump in increments of 90 degrees from one frame to the following frame that I've seen indicate a section of keys that need to be inverted (eg: "Mirror by Values over Value ___") in value before they can be shifted-in-value in 180 degree increments to yield continuous Euler curves. (eg: Frames 407-432 in "DiscontinuousEulerFIlter_Applied.blend", which must have the X and Z values in that range shifted in value by -180... but the Y VALUES be Key > Mirror > By Values over Value = 0, before having their values shifted by -180 before the curves in that section link up with preceeding keys and also yield the original action.)

Emily Amadhia Albee commented

2016-02-24 18:22:18 +01:00

Changed status to: 'Open'

Emily Amadhia Albee commented

2016-02-24 18:22:18 +01:00

Added subscriber: @Albee

Joshua Leung commented

2016-02-25 06:57:50 +01:00

Added subscriber: @JoshuaLeung

Joshua Leung commented

2016-02-25 14:13:35 +01:00

Indeed, the Euler Filter could do with some improvements to deal with problems like this better. Checking the code, it is a known problem that the current method is too crude to cope with some situations like this.

Marking as todo for now, since this isn't a new issue/regression.

Indeed, the Euler Filter could do with some improvements to deal with problems like this better. Checking the code, it is a known problem that the current method is too crude to cope with some situations like this. Marking as todo for now, since this isn't a new issue/regression.

iurimonteiro commented

2019-11-06 18:41:43 +01:00

Added subscriber: @iurimonteiro