---
title: "Position Constraint"
url: "https://help.maxon.net/c4d/en-us/Content/html/TPHCONSTRAINTPOS.html"
section_path: "Motion Tracker > Motion Tracker Tags > Position Constraint"
element_id: "TPHCONSTRAINTPOS"
command_id: "1029908"
description: "This page describes the Position Constraint tag for motion tracking in Cinema 4D. It pins the world origin to a chosen track feature, positioning the …"
---

# Position Constraint

> **Note:** **What is it about?**
>
> This page describes the **Position Constraint tag** for motion tracking in **Cinema 4D**. It pins the world origin to a chosen track feature, positioning the whole reconstruction — typically the first calibration step after solving.

> **Tip:** Tip:This tag only works after 3D features have been generated, i.e., a 3D reconstruction has taken place.

The Position Constraint binds the world origin, for example, to a specific feature (this will be the Object Tracker's origin if the Object Tracker is used) - the vertex cluster will be positioned accordingly.

Use the tag as follows to calibrate (2 methods):

- Create the tag for the respective **Motion Tracker** or **Object Tracker** object. A small orange circle will be displayed at the center of the Viewport (always visible when the tag is active). Drag this circle onto the desired Track or feature:

  ![Image: 038371.jpg](https://help.maxon.net/c4d/en-us/Content/Resources/Images/038371.jpg)

  The **Motion Tracker** links the associated Null object in the tag and uses it to define the world origin, for example, by moving the vertex cluster, including the camera, accordingly.

- Select the **Create Position Constraint** command (main menu: Tracker | Constraints and click on the desired Track. A Position Constraint tag with a linked Null object that matches the Track will be created automatically.

[Here you will find](https://help.maxon.net/c4d/en-us/Content/html/53374.html.md) an example scene with an assigned tag.

Create Position Constraint

This command creates a Position Constraint tag with a matching linked feature (see previous paragraph).