Parameter Reference

A parameter reference can be setup between any two parameters by putting an expression in one parameter that refers to another parameter. This creates a Link between the two parameters such that when one changes, the other will change automatically. A Parameter reference is a type of Link, known in other software as a "constraint".

Source Parameter - this parameter is being referenced by another parameter.

Reference Parameter - this parameter's value is linked (referenced) to the source parameter and contains an expression.

Any change in the source parameter's value will change the referenced parameter's value.

Making a Parameter Reference

Using right-click menus

1) Right click on any parameter and select Yank Parameter. This will be the source parameter.

2) Go to the parameter you wish to be referenced, right-click and select Put Yanked References

Using expressions

Use a Python expression like op('pattern1').par.phase * 20. in the parameter.

Every operator in TouchDesigner has a set of control Parameters that can be integer or floating point numbers, menus, binary toggles, text strings or operator paths, which determine the output of the operator.

A Link. The grey dashed lines between nodes is a Reference or Link that indicates one operator is getting data from another operator from any Operator Family.

The grey dashed lines between nodes is a Reference (or Link). A Reference is (1) a Parameter Reference, a parameter in an OP that is a name or path to another operator, (2) a Node Reference, an expression in a parameter or DAT script that contains the name or path of another operator, (3) a DAT Cell Reference or (4) a CHOP Channel Reference.

A Link or Reference is a dashed line between nodes that represent other data flowing between nodes. Examples are CHOP Exports, node Paths in parameters, and expressions in parameters referencing CHOP channels, DAT tables and other nodes. In contrast is a Wire that connects nodes in the same Operator Family.

A parameter reference can be setup between any two parameters by putting an expression in one parameter that refers to another parameter. This creates a Link between the two parameters such that when one changes, the other will change automatically (known in other software as a "constraint").