Constitution UID

The Constitution UID is a unique identifier for a constitution known by libuipc, which is a 64-bit unsigned integer.

The official constitution UID has a range of \([0, 2^{32}-1]\). The range \([2^{32}, 2^{64}-1]\) is reserved for user-defined constitutions.

Every official constitution will be documented in this specification. A user-defined constitution can apply for an official constitution UID by submitting a pull request to the libuipc repository, After code review, the constitution will be added to the official constitution list.

The related documentation of the constitution will be added to the Constutitions/ directory.

When applying a constitution to a geometry, the constitution_uid attribute of the meta attribute of the geometry will be set to the constitution UID. The backend will use this UID to determine the constitution of the geometry.

Official UID List

UID	Name	Type	Source
0	Empty	FiniteElement	src/constitution/empty.cpp
1	OrthoPotential	AffineBody	src/constitution/affine_body_constitution.cpp
2	ARAP	AffineBody	src/constitution/affine_body_constitution.cpp
3	AffineBody	AffineBody	src/constitution/affine_body_constitution.cpp
4	AffineBody	AffineBody	src/constitution/affine_body_constitution.cpp
5	AffineBody	AffineBody	src/constitution/affine_body_constitution.cpp
6	AffineBody	AffineBody	src/constitution/affine_body_constitution.cpp
7	AffineBody	AffineBody	src/constitution/affine_body_constitution.cpp
8	AffineBody	AffineBody	src/constitution/affine_body_constitution.cpp
9	ARAP	FiniteElement	src/constitution/arap.cpp
10	StableNeoHookean	FiniteElement	src/constitution/stable_neo_hookean.cpp
11	NeoHookeanShell	FiniteElement	src/constitution/neo_hookean_shell.cpp
12	HookeanSpring	FiniteElement	src/constitution/hookean_spring.cpp
13	Particle	FiniteElement	src/constitution/particle.cpp
14	SoftPositionConstraint	Constraint	src/constitution/soft_position_constraint.cpp
15	KirchhoffRodBending	FiniteElement	src/constitution/kirchhoff_rod_bending.cpp
16	SoftTransformConstraint	Constraint	src/constitution/soft_transform_constraint.cpp
17	DiscreteShellBending	FiniteElement	src/constitution/discrete_shell_bending.cpp
18	AffineBodyRevoluteJoint	InterAffineBody	src/constitution/affine_body_revolute_joint.cpp
19	AffineBodyDrivingRevoluteJoint	Constraint	src/constitution/affine_body_driving_revolute_joint.cpp
20	AffineBodyPrismaticJoint	InterAffineBody	src/constitution/affine_body_prismatic_joint.cpp
21	AffineBodyDrivingPrismaticJoint	Constraint	src/constitution/affine_body_driving_prismatic_joint.cpp
22	SoftVertexStitch	InterPrimitive	src/constitution/soft_vertex_stitch.cpp
23	ExternalArticulationConstitution	InterAffineBody	src/constitution/external_articulation_constraint.cpp
24	ExternalArticulationConstraint	Constraint	src/constitution/external_articulation_constraint.cpp
25	AffineBodyFixedJoint	InterAffineBody	src/constitution/affine_body_fixed_joint.cpp
26	AffineBodySphericalJoint	InterAffineBody	src/constitution/affine_body_spherical_joint.cpp
27	AffineBodyDrivingSphericalJoint	Constraint	src/constitution/affine_body_driving_spherical_joint.cpp
28	AffineBodyD6Joint	InterAffineBody	src/constitution/affine_body_d6_joint.cpp
29	SoftVertexEdgeStitch	InterPrimitive	src/constitution/soft_vertex_edge_stitch.cpp
30	SoftVertexTriangleStitch	InterPrimitive	src/constitution/soft_vertex_triangle_stitch.cpp
31	StrainPlasticDiscreteShellBending	FiniteElement	src/constitution/strain_plastic_discrete_shell_bending.cpp
32	StressPlasticDiscreteShellBending	FiniteElement	src/constitution/stress_plastic_discrete_shell_bending.cpp
666	AffineBodyExternalForce	Constraint	src/constitution/affine_body_external_force.cpp
667	AffineBodyPrismaticJointExternalForce	Constraint	src/constitution/affine_body_prismatic_joint_external_force.cpp
668	AffineBodyRevoluteJointExternalForce	Constraint	src/constitution/affine_body_revolute_joint_external_force.cpp
669	AffineBodyPrismaticJointLimit	InterAffineBody	src/constitution/affine_body_prismatic_joint_limit.cpp
670	AffineBodyRevoluteJointLimit	InterAffineBody	src/constitution/affine_body_revolute_joint_limit.cpp
671	FiniteElementExternalForce	Constraint	src/constitution/finite_element_external_force.cpp
819	StrainLimitingBaraffWitkinShell	FiniteElement	src/constitution/strain_limiting_baraff_witkin.cpp