【Physics】3. Joint joint

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1. Major basic joint components

1. Hinge Joint-Hinge Joint
2. Fixed Joint-Fixed Joint
3. Spring Joint-Spring Joint
4. Character Joint-Character Joint
5. Configurable Joint-Configurable Joint

The following only takes 铰链关节the record, the rest are similar

2. Hinge Joint

A hinge joint (Hinge Joint) combines two rigid bodies together, constraining the rigid bodies so that they move as if connected by a hinge.

Hinge joints are great for doors, but can also be used to simulate things like chains, pendulums, etc.

Attributes	Function
Connected Body	A reference to the Rigidbody the joint depends on (optional). If not set, the joint is connected to the world.
Anchor	The position of the axis of oscillation about which the connected body is oscillating. The position is defined in local space.
Axis	The connecting body revolves around the direction of the axis of swing. The direction is defined in local space.
Auto Configure Connected Anchor	If enabled, the Connected Anchor position is automatically calculated to match the global position of the Anchor property. This is the default behavior. If this property is disabled, the location of connection anchors can be manually configured.
Connected Anchor	Manually configure the connection anchor location.
Use Spring	A spring causes a rigid body to assume a specific angle relative to its connected body.
Spring	Properties of the spring used when Use Spring is enabled .
Spring	The force the object claims to exert when it moves into place.
Damper	The higher the value, the faster the object decelerates.
Target Position	The target angle of the spring. The spring is stretched towards this angle (in degrees).
Use Motor	The motor rotates the object.
Motor	Properties of the motor used with Use Motor enabled.
Target Velocity	The velocity the object is trying to achieve.
Force	The force applied to achieve this velocity.
Free Spin	If this property is enabled, the motors are never used to brake rotation, only acceleration.
Use Limits	If this property is enabled, the hinge's angle will be limited to Min to Max values.
Limits	Attributes for the limits used if Use Limits is enabled .
Min	The smallest angle the rotation can reach.
Max	The maximum angle the rotation can reach.
Bounciness	The amount of bounce the object has when it reaches the minimum or maximum stop limit.
Contact Distance	Within the contact distance from the limit position, the contact will continue to avoid chattering.
Break Force	The force required to break this joint.
Break Torque	The torque required to break this joint.
Enable Collision	When this check box is checked, collisions between jointed connected bodies are allowed.
Enable Preprocessing	Disabling preprocessing helps stabilize unsatisfiable configurations.