A Parent Constraint moves and rotates a GameObjectThe fundamental object in Unity scenes, which can represent characters, props, scenery, cameras, waypoints, and more. A GameObject’s functionality is defined by the Components attached to it. More info
See in Glossary as if it is the child of another GameObject in the Hierarchy window. However, it offers certain advantages that are not possible when you make one GameObject the parent of another:
A Parent Constraint does not affect scale.
A Parent Constraint can link to multiple GameObjects.
A GameObject does not have to be a child of the GameObjects that the Parent Constraint links to.
You can vary the effect of the Constraint by specifying a weight, as well as weights for each of its source GameObjects.
For example, to place a sword in the hand of a character, add a Parent Constraint component to the sword GameObject. In the Sources list of the Parent Constraint, link to the character’s hand. This way, the movement of the sword is constrained to the position and rotation of the hand.
Property: | Function: | |
---|---|---|
Activate | After you move and rotate the constrained GameObject and its source GameObjects, click Activate to save this information. Activate saves the current offset from the source GameObjects in Rotation At Rest, Position At Rest, Position Offset, and Rotation Offset, then checks Is Active and Lock. | |
Zero | Sets the position and rotation of the constrained GameObject to the source GameObjects. Zero resets the Rotation At Rest, Position At Rest, Position Offset, and Rotation Offset fields then checks Is Active and Lock. | |
Is Active | Toggles whether or not to evaluate the Constraint. To also apply the Constraint, make sure Lock is checked. | |
Weight | The strength of the Constraint. A weight of 1 causes the Constraint to move and rotate this GameObject at the same rate as its source GameObjects. A weight of 0 removes the effect of the Constraint completely. This weight affects all source GameObjects. Each GameObject in the Sources list also has a weight. | |
Constraint Settings | ||
Lock | Toggle to let the Constraint move and rotate the GameObject. Uncheck this property to edit the position and rotation of this GameObject. You can also edit the Rotation At Rest, Position At Rest, Position Offset, and Rotation Offset properties. If Is Active is checked, the Constraint updates the Rotation At Rest, Position At Rest, Position Offset, or Rotation Offset properties for you as you move and rotate the GameObject or its Source GameObjects. When you are satisfied with your changes, check Lock to let the Constraint to control this GameObject. This property has no effect in Play Mode. | |
Position At Rest | The X, Y, and Z values to use when Weight is 0 or when the corresponding Freeze Position Axes are not checked. To edit these fields, uncheck Lock. | |
Rotation At Rest | The X, Y, and Z values to use when Weight is 0 or when the corresponding Freeze Rotation Axes are not checked. To edit these fields, uncheck Lock. | |
Position Offset | The X, Y, and Z position offset from the Transform that the Constraint imposes. To edit these fields, uncheck Lock. | |
Rotation Offset | The X, Y, and Z rotation offset from the Transform that the Constraint imposes. To edit these fields, uncheck Lock. | |
Freeze Position Axes | Check X, Y, or Z to allow the Constraint to control the corresponding position axes. Uncheck an axis to stop the Constraint from controlling it, which allows you to edit, animate, or script it. | |
Freeze Rotation Axes | Check X, Y, or Z to allow the Constraint to control the corresponding rotation axes. Uncheck an axis to stop the Constraint from controlling it, which allows you to edit, animate, or script it. | |
Sources | The list of GameObjects that constrain this GameObject. Unity evaluates source GameObjects in the order they appear in this list. This order affects how this Constraint moves and rotates the constrained GameObject. To get the result you want, drag and drop items in this list. Each source has a weight from 0 to 1. |
2018–03–13 Page published
Constraints added in 2018.1
ParentConstraint
When you visit any website, it may store or retrieve information on your browser, mostly in the form of cookies. This information might be about you, your preferences or your device and is mostly used to make the site work as you expect it to. The information does not usually directly identify you, but it can give you a more personalized web experience. Because we respect your right to privacy, you can choose not to allow some types of cookies. Click on the different category headings to find out more and change our default settings. However, blocking some types of cookies may impact your experience of the site and the services we are able to offer.
More information
These cookies enable the website to provide enhanced functionality and personalisation. They may be set by us or by third party providers whose services we have added to our pages. If you do not allow these cookies then some or all of these services may not function properly.
These cookies allow us to count visits and traffic sources so we can measure and improve the performance of our site. They help us to know which pages are the most and least popular and see how visitors move around the site. All information these cookies collect is aggregated and therefore anonymous. If you do not allow these cookies we will not know when you have visited our site, and will not be able to monitor its performance.
These cookies may be set through our site by our advertising partners. They may be used by those companies to build a profile of your interests and show you relevant adverts on other sites. They do not store directly personal information, but are based on uniquely identifying your browser and internet device. If you do not allow these cookies, you will experience less targeted advertising. Some 3rd party video providers do not allow video views without targeting cookies. If you are experiencing difficulty viewing a video, you will need to set your cookie preferences for targeting to yes if you wish to view videos from these providers. Unity does not control this.
These cookies are necessary for the website to function and cannot be switched off in our systems. They are usually only set in response to actions made by you which amount to a request for services, such as setting your privacy preferences, logging in or filling in forms. You can set your browser to block or alert you about these cookies, but some parts of the site will not then work. These cookies do not store any personally identifiable information.