Dependency

Dependency is the Procedural mechanism in TouchDesigner, where if one piece of data changes, it automatically causes other operators and expressions to re-Cook. This assures all data is consistent in a TouchDesigner process, and causes all the output displays, UIs, devices and protocols to update in realtime.

Automatic Dependency

If there is a change in an operator's output data or parameter value, it causes other operators downstream from it to cook. Downstream means operators that are connected to the output of a changed node, and operators (or their parameters) that refer to the changed operator (often visible as the dashed-lines in a network).

See Cook.

Python Data Dependency

Because Python does not inherently have a procedural mechanism, Dependency Objects in TouchDesigner allow python data to cause downstream cooking when that data is changed.

See Dependency_Class for how to set up Python Dependency. To create recursively dependable Python collections, see Deeply Dependable Collections.

is the Procedural mechanism in TouchDesigner, where if one piece of data changes, it automatically causes other operators and expressions to re-Cook.