this is a simple picture frame rig. it still needs a couple more controls and possibly movable pivot.
picture frame rig v1 from Nathan Anozie on Vimeo.
these are some of the steps i used to create this.
making picture frame armature
-orient armature root bone to match world. use armature axes on to see. ex: rx -90
-using geo vertices to position stand bone. ‘cursor to selected’ and ‘selected to cursor’. to get bone following stand
use roll to get proper direction for in pose mode rotations here +x should move stand closer to frame. (ex: roll 180)
using envelope view so can see different bones on top of one another. changing radius of head/tail and envelope.(alt+s)
parent frame and stand bones to root. (in edit mode select child then parent then ctrl+p)
parent frame and stand geo to bones. (in pose mode select child then parent then ctrl+p bone option)
making custom shapes for stand/frame/root.
could make shapes using add mesh. then square ones from a plane after deleting face. made a different shape for each animated bone. (put created widgets in last layer >> select mesh >> m shortcut >> pick layer)
(so just shapes and no envelope displayed switched armature display back to octahedral/axes off)
did some cleanup like lock channels that weren't being used. here left scales and all rotations open on root animatable bone.
—tool ideas from making this
-make meshes unselectable (arrow icon in outliner)
bpy.context.object.hide_select = True
-way to draw a bone to match orientation of 4 vertex plane
-way to lock rotations/locations channels
-way to import geometry from one blend file to another
Happy Rigging!
Nate