Motion interaction

Motioncube has built-in high-quality image analysis and motion detection modules, which allow you to achieve a natural effect of controlling body movement on the interactive floor and other projection surfaces.

The principle of operation simplified

  • Motioncube built-in motion interaction works with a camera that needs to be mounted next to the projector. Thus, other techniques and additional sensors are not used. The surface itself, on which the image from the projector is displayed, also does not have any magical properties, which is sometimes found by users who have contact with this type of technology for the first time.
  • In connection with the use of the camera for motion detection, you should be aware of the specifics of working in this type of interactive environment. In particular, it should be borne in mind that interaction is triggered by any movement that the camera can see in its field of view. Therefore, it should not be expected that the interaction is triggered only by contact with the ground.
  • In practice, you can see that everything that leaves its shadow on the projection surface interacts (some use the term shadow interaction here). This is due to the exact alignment of the camera with the projector, which is required for the whole thing to work precisely (more on calibration can be found in the Motioncube Player > Calibration).
  • The motion detection algorithms used in the Motioncube analyze only motion change - stationary objects are not detected, so they do not interact.


To enable motion interaction on the projection surface, your hardware configuration should meet the following requirements:

  • Requires a camera that can only see in the infrared range (cannot see visible light, i.e. the image that the projector displays).
  • Requires illumination of the projection area with infrared light.

Exact guidelines

A detailed list of requirements can be found on the following subpages of the documentation, in particular in the Camera selection > Explanation Requirements > Motion Interaction, which details the camera guidelines required for the Motion Interaction module to function properly.


Below are the guidelines relevant to interaction with movement on the interactive floor. An overview of all the guidelines and suggestions for organizing the working environment can be found on the website Working environment > General assembly schemes.

Mounting centrally from above


  • Install the projector at least twice the height of the users (e.g. 3.6m from the ground if the floor will be used by teenagers or adults). Installation at lower heights (e.g. below 2.5 m) may result in a tall person standing under the projector obscuring important parts of the image on the floor and being unable to precisely control the application interface.

Advantages of this method of assembly:

  • Natural way to interact with movement in every direction.
  • A slight degree of obscuring the image with a shadow.

Disadvantages of this method of assembly:

  • It is difficult to prepare a mobile stand for an easy change of location.
  • It is not possible to attach the IR pen control module.

Side mount


  • Mount the projector at a minimum height of 1.8m with it pointing vertically downwards.


Most projectors are not designed to be mounted vertically downwards. See Projector selection for more information on how to select a projector.

Advantages of this method of assembly:

  • No cooperative shadow effect for applications designed to work facing the projector.
  • You can prepare a workstation with IR pen control support.

Disadvantages of this method of assembly:

  • Large shadow effect that obscures the image for people with their backs to the projector.
  • Less precise interaction compared to top-centre mounting in applications requiring interaction in all directions (e.g. kicking a ball).