Rigify new spines.super_head won't generate if sample is one bone only #75285

New Issue

Ivan Cappiello · 2020-04-01T18:09:29+02:00

Ivan Cappiello commented

2020-04-01 18:09:29 +02:00

Blender Version
Broken:
2.82a release

Short description of error
Rigify new spines.super_head won't generate if sample is one bone only

Exact steps for others to reproduce the error

add a single bone and assign rigify spines.super_head property in pose mode bone properties panel.
generate rig

This sample should work as replacement for neck part of the spines.super_spine rigify sample but fails if only one bone is present in the chain.

in spines.super_spine it used to work assuming last bone of the chain will always be head. So basing on this assumption the generate would act like this based on if cases:

if chain is 1 bone, only head system will be created ignoring neck (head position == neck position)

if chain is 2 bones will be considered 1 neck + 1 head bone (head position = neck position +1)

if chain is 3 bones will be considered 2 neck +1 head bone

if chain is more than 3 bones will be considered (n) animal ik neck + head bone

seems the first condition is ignored by new sample.
This sample was indeed used for some animals like fishes and snakes where you only need an head system attached to the spine/tail.

**Blender Version** Broken: 2.82a release **Short description of error** Rigify new spines.super_head won't generate if sample is one bone only **Exact steps for others to reproduce the error** 1. add a single bone and assign rigify **spines.super_head** property in pose mode bone properties panel. 2. generate rig This sample should work as replacement for neck part of the **spines.super_spine** rigify sample but fails if only one bone is present in the chain. in spines.super_spine it used to work assuming last bone of the chain will always be head. So basing on this assumption the generate would act like this based on if cases: if chain is 1 bone, only head system will be created ignoring neck (head position == neck position) if chain is 2 bones will be considered 1 neck + 1 head bone (head position = neck position +1) if chain is 3 bones will be considered 2 neck +1 head bone if chain is more than 3 bones will be considered (n) animal ik neck + head bone seems the first condition is ignored by new sample. This sample was indeed used for some animals like fishes and snakes where you only need an head system attached to the spine/tail.

Ivan Cappiello commented

2020-04-01 18:09:29 +02:00

Added subscriber: @icappiello

Alexander Gavrilov was assigned by Ivan Cappiello

2020-04-01 18:10:03 +02:00

Ivan Cappiello commented

2020-04-16 12:18:41 +02:00

Changed status from 'Needs Triage' to: 'Confirmed'