Use the Configurable JointA physics component allowing a dynamic connection between Rigidbody components, usually allowing some degree of movement such as a hinge. More info
See in Glossary to create custom targets and driving forces for a simulated motor.
To configure driving forces on a Configurable JointAn extremely customizable joint that other joint types are derived from. It can be used to create anything from adapted versions of existing joints to custom designed and highly specialized joints. More info
See in Glossary:
1. Choose whether you want to apply a target position or apply a target velocity for the driving force to reach. Targets can be linear (directional) or angular (rotational).
1. Configure driving forces for the respective axes, using properties that simulate a spring and damper system.
Note: You can apply both a linear force and a rotational force to a joint. However, you should not apply more than one linear force or more than one rotational force. If you apply more than one, the physics system attempts to solve both at once and produces unwanted results. For example, if you apply a rotational force Target Rotation and a linear force Target VelocityA joint property to set the desired velocity with which the joint should move to the Target Position under the drive force. More info
See in Glossary, you would create a joint that stays at a specific rotation and moves at a specific linear velocity. However, if you apply two rotational forces, a Target Rotation and a Target Angular Velocity, the physics system attempts to keep the object at a specific rotation while also rotating it at a specific velocity.
To apply a spring-like behavior that always tries to return the object to a specified position or rotation, set a target positionA joint property to set the target position that the joint’s drive force should move it to. More info
See in Glossary. You can set a linear position, a rotational position, or both.
You must also set the respective linear or angular axis drives, as described on Driving forces with Configurable Joints.
Important: For a Configurable Joint to apply the driving force necessary to reach the target position, the Position Spring value on any affected axis drive must be something other than 0
.
To apply a specific continuous velocity, set a target velocity. You can set a linear motion velocity, a rotational motion velocity, or both.
To set a target linear velocity, use the Target Velocity’s X, Y and Z values. These values configure each axis individually, in meters per second.
To set a target angular velocity, there are two options:
You must also set the respective linear or angular axis drives, as described on Driving forces with Configurable Joints.
Important: For a Configurable Joint to apply the driving force necessary to reach the target velocity, the Position Damper value on any affected axis drive must be something other than 0
.
For each axis drive you want to apply force on, use Position Spring to configure the spring force to apply, and Position Damper to configure the damping effect on that spring force.
Apply trial and error on the spring and damper values to achieve the results you need, and test at run time to check that the forces you apply are enough to counter any other forces applied to the object.
Note: You can apply both a linear force and a rotational force to a joint. However, you should not apply more than one directional force or more than one rotational force. If you apply more than one, the physics system attempts to solve both at once and produces unwanted results. For example, if you apply a rotational force Target Rotation and a linear force Target Velocity, you would create a joint that stays at a specific rotation and moves at a specific linear velocity. However, if you apply two rotational forces, a Target Rotation and a Target Angular Velocity, the physics system attempts to keep the object at a specific rotation while also rotating it at a specific velocity.
Did you find this page useful? Please give it a rating:
Thanks for rating this page!
What kind of problem would you like to report?
Thanks for letting us know! This page has been marked for review based on your feedback.
If you have time, you can provide more information to help us fix the problem faster.
Provide more information
You've told us this page needs code samples. If you'd like to help us further, you could provide a code sample, or tell us about what kind of code sample you'd like to see:
You've told us there are code samples on this page which don't work. If you know how to fix it, or have something better we could use instead, please let us know:
You've told us there is information missing from this page. Please tell us more about what's missing:
You've told us there is incorrect information on this page. If you know what we should change to make it correct, please tell us:
You've told us this page has unclear or confusing information. Please tell us more about what you found unclear or confusing, or let us know how we could make it clearer:
You've told us there is a spelling or grammar error on this page. Please tell us what's wrong:
You've told us this page has a problem. Please tell us more about what's wrong:
Thank you for helping to make the Unity documentation better!
Your feedback has been submitted as a ticket for our documentation team to review.
We are not able to reply to every ticket submitted.