Control Rig
Control Rig is UE’s procedural rigging system. Blueprint AI supports creating Control Rig assets, manipulating the rig hierarchy (bones, controls, nulls), and editing the rig graph.
Creating a Control Rig
Section titled “Creating a Control Rig”Create a Control Rig called CR_Hand in /Game/Rigs
Hierarchy
Section titled “Hierarchy”Add a control called Ctrl_Wrist to CR_Hand Add a null called Null_Palm as a child of Ctrl_Wrist Add a bone called Bone_Index1 as a child of Null_Palm
Hierarchy element types: Control, Null, Bone.
Control shapes and settings
Section titled “Control shapes and settings”Set the shape of Ctrl_Wrist to Sphere with scale 5 Set the control mode of Ctrl_Wrist to Rotation
Rig graph
Section titled “Rig graph”Add a GetTransform node for Ctrl_Wrist in the forward solve graph Wire the transform output into a SetTransform node for Bone_Index1
The rig graph drives procedural animation. Blueprint AI supports adding and wiring nodes in both the forward solve and backwards solve graphs.