Touch Marker
 | Touch Marker | Receiver for unique marker objects such as fiducial, bar-coded objects, and so on. |
Camera based MultiTouch systems often support the recognition of uniquely marked objects. For example, a glass might have a barcode underneath it and when placed on the tracking surface, a special menu shows the user a selection of dishes that go well with exactly this drink. Ventuz supports marker objects sent by the TUIO protocol (i.e. 2Dcur messages) in that it recognizes it is no ordinary touch and that it stores the unique ID sent with it. The Touch Marker node is therefore a special node as it is the only node that reacts to marker objects. Marker touches also cannot be used to activate any of the other interaction nodes.
Ventuz only supports one object for a certain ID at the same time. The behavior if multiple objects with the same ID are placed on the tracking surface is undefined.