Constraint(bpy_struct)

base class — bpy_struct

subclasses — ActionConstraint, ArmatureConstraint, CameraSolverConstraint, ChildOfConstraint, ClampToConstraint, CopyLocationConstraint, CopyRotationConstraint, CopyScaleConstraint, CopyTransformsConstraint, DampedTrackConstraint, FloorConstraint, FollowPathConstraint, FollowTrackConstraint, KinematicConstraint, LimitDistanceConstraint, LimitLocationConstraint, LimitRotationConstraint, LimitScaleConstraint, LockedTrackConstraint, MaintainVolumeConstraint, ObjectSolverConstraint, PivotConstraint, PythonConstraint, RigidBodyJointConstraint, ShrinkwrapConstraint, SplineIKConstraint, StretchToConstraint, TrackToConstraint, TransformCacheConstraint, TransformConstraint

class bpy.types.Constraint(bpy_struct)

Constraint modifying the transformation of objects and bones

active

Constraint is the one being edited

Type

boolean, default False

error_location

Amount of residual error in Blender space unit for constraints that work on position

Type

float in [-inf, inf], default 0.0, (readonly)

error_rotation

Amount of residual error in radians for constraints that work on orientation

Type

float in [-inf, inf], default 0.0, (readonly)

influence

Amount of influence constraint will have on the final solution

Type

float in [0, 1], default 0.0

is_proxy_local

Constraint was added in this proxy instance (i.e. did not belong to source Armature)

Type

boolean, default False, (readonly)

is_valid

Constraint has valid settings and can be evaluated

Type

boolean, default False, (readonly)

mute

Enable/Disable Constraint

Type

boolean, default False

name

Constraint name

Type

string, default “”, (never None)

owner_space

Space that owner is evaluated in

  • WORLD World Space, The constraint is applied relative to the world coordinate system.

  • POSE Pose Space, The constraint is applied in Pose Space, the object transformation is ignored.

  • LOCAL_WITH_PARENT Local With Parent, The constraint is applied relative to the rest pose local coordinate system of the bone, thus including the parent-induced transformation.

  • LOCAL Local Space, The constraint is applied relative to the local coordinate system of the object.

Type

enum in [‘WORLD’, ‘POSE’, ‘LOCAL_WITH_PARENT’, ‘LOCAL’], default ‘WORLD’

show_expanded

Constraint’s panel is expanded in UI

Type

boolean, default False

target_space

Space that target is evaluated in

  • WORLD World Space, The transformation of the target is evaluated relative to the world coordinate system.

  • POSE Pose Space, The transformation of the target is only evaluated in the Pose Space, the target armature object transformation is ignored.

  • LOCAL_WITH_PARENT Local With Parent, The transformation of the target bone is evaluated relative to its rest pose local coordinate system, thus including the parent-induced transformation.

  • LOCAL Local Space, The transformation of the target is evaluated relative to its local coordinate system.

Type

enum in [‘WORLD’, ‘POSE’, ‘LOCAL_WITH_PARENT’, ‘LOCAL’], default ‘WORLD’

type
  • CAMERA_SOLVER Camera Solver.

  • FOLLOW_TRACK Follow Track.

  • OBJECT_SOLVER Object Solver.

  • COPY_LOCATION Copy Location, Copy the location of a target (with an optional offset), so that they move together.

  • COPY_ROTATION Copy Rotation, Copy the rotation of a target (with an optional offset), so that they rotate together.

  • COPY_SCALE Copy Scale, Copy the scale factors of a target (with an optional offset), so that they are scaled by the same amount.

  • COPY_TRANSFORMS Copy Transforms, Copy all the transformations of a target, so that they move together.

  • LIMIT_DISTANCE Limit Distance, Restrict movements to within a certain distance of a target (at the time of constraint evaluation only).

  • LIMIT_LOCATION Limit Location, Restrict movement along each axis within given ranges.

  • LIMIT_ROTATION Limit Rotation, Restrict rotation along each axis within given ranges.

  • LIMIT_SCALE Limit Scale, Restrict scaling along each axis with given ranges.

  • MAINTAIN_VOLUME Maintain Volume, Compensate for scaling one axis by applying suitable scaling to the other two axes.

  • TRANSFORM Transformation, Use one transform property from target to control another (or same) property on owner.

  • TRANSFORM_CACHE Transform Cache, Look up the transformation matrix from an external file.

  • CLAMP_TO Clamp To, Restrict movements to lie along a curve by remapping location along curve’s longest axis.

  • DAMPED_TRACK Damped Track, Point towards a target by performing the smallest rotation necessary.

  • IK Inverse Kinematics, Control a chain of bones by specifying the endpoint target (Bones only).

  • LOCKED_TRACK Locked Track, Rotate around the specified (‘locked’) axis to point towards a target.

  • SPLINE_IK Spline IK, Align chain of bones along a curve (Bones only).

  • STRETCH_TO Stretch To, Stretch along Y-Axis to point towards a target.

  • TRACK_TO Track To, Legacy tracking constraint prone to twisting artifacts.

  • ACTION Action, Use transform property of target to look up pose for owner from an Action.

  • ARMATURE Armature, Apply weight-blended transformation from multiple bones like the Armature modifier.

  • CHILD_OF Child Of, Make target the ‘detachable’ parent of owner.

  • FLOOR Floor, Use position (and optionally rotation) of target to define a ‘wall’ or ‘floor’ that the owner can not cross.

  • FOLLOW_PATH Follow Path, Use to animate an object/bone following a path.

  • PIVOT Pivot, Change pivot point for transforms (buggy).

  • RIGID_BODY_JOINT Rigid Body Joint, Use to define a Rigid Body Constraint (for Game Engine use only).

  • SHRINKWRAP Shrinkwrap, Restrict movements to surface of target mesh.

Type

enum in [‘CAMERA_SOLVER’, ‘FOLLOW_TRACK’, ‘OBJECT_SOLVER’, ‘COPY_LOCATION’, ‘COPY_ROTATION’, ‘COPY_SCALE’, ‘COPY_TRANSFORMS’, ‘LIMIT_DISTANCE’, ‘LIMIT_LOCATION’, ‘LIMIT_ROTATION’, ‘LIMIT_SCALE’, ‘MAINTAIN_VOLUME’, ‘TRANSFORM’, ‘TRANSFORM_CACHE’, ‘CLAMP_TO’, ‘DAMPED_TRACK’, ‘IK’, ‘LOCKED_TRACK’, ‘SPLINE_IK’, ‘STRETCH_TO’, ‘TRACK_TO’, ‘ACTION’, ‘ARMATURE’, ‘CHILD_OF’, ‘FLOOR’, ‘FOLLOW_PATH’, ‘PIVOT’, ‘RIGID_BODY_JOINT’, ‘SHRINKWRAP’], default ‘CAMERA_SOLVER’, (readonly)

classmethod bl_rna_get_subclass(id, default=None)
Parameters

id (string) – The RNA type identifier.

Returns

The RNA type or default when not found.

Return type

bpy.types.Struct subclass

classmethod bl_rna_get_subclass_py(id, default=None)
Parameters

id (string) – The RNA type identifier.

Returns

The class or default when not found.

Return type

type

Inherited Properties

Inherited Functions

References