Bone roll keeps changing when switching between EDIT <-> OBJECT mode #23954

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Tim Baker · 2010-09-22T22:09:07+02:00

Tim Baker commented

2010-09-22 22:09:07 +02:00

%%%Seen in current beta as well as SVN r32066 (Win32).

In the attached .blend file take note of the bone roll for the selected bone 'Bip01_l_toe2'. Now tab repeated between OBJECT and EDIT modes and watch the bone roll change to some seemingly random value.

You can set the bone roll to '0' or any other value and it behaves the same when tabbing. The matching bone on the other foot 'Bip01_r_toe2' behaves the same.
None of the other bones I checked had this behaviour.%%%

%%%Seen in current beta as well as SVN r32066 (Win32). In the attached .blend file take note of the bone roll for the selected bone 'Bip01_l_toe2'. Now tab repeated between OBJECT and EDIT modes and watch the bone roll change to some seemingly random value. You can set the bone roll to '0' or any other value and it behaves the same when tabbing. The matching bone on the other foot 'Bip01_r_toe2' behaves the same. None of the other bones I checked had this behaviour.%%%

Tim Baker commented

2010-09-22 22:09:07 +02:00

Changed status to: 'Open'

Tim Baker commented

2010-09-23 02:31:50 +02:00

%%%Tracked down the cause but not sure what the proper solution is. In armature.c it seems the 0.0000000000001 is too strict,
maybe use FLT_EPSILON instead?

void vec_roll_to_mat3(float *vec, float roll, float mat- [ ][3])
{

  normalize_v3_v3(nor, vec);
  cross_v3_v3v3(axis,target,nor);
  if (dot_v3v3(axis,axis) > 0.0000000000001) {%%%

%%%Tracked down the cause but not sure what the proper solution is. In armature.c it seems the 0.0000000000001 is too strict, maybe use FLT_EPSILON instead? void vec_roll_to_mat3(float *vec, float roll, float mat- [ ][3]) { ``` normalize_v3_v3(nor, vec); cross_v3_v3v3(axis,target,nor); if (dot_v3v3(axis,axis) > 0.0000000000001) {%%%

Campbell Barton commented

2010-09-23 03:49:23 +02:00

%%%tested with a lower epsilon value, 0.00001 is stable.
fixed in svn r32067.%%%

%%%tested with a lower epsilon value, 0.00001 is stable. fixed in svn r32067.%%%

Campbell Barton commented

2010-09-23 03:49:23 +02:00

Changed status from 'Open' to: 'Resolved'

Campbell Barton closed this issue

2010-09-23 03:49:23 +02:00

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Bone roll keeps changing when switching between EDIT <-> OBJECT mode #23954