The Control Parameter plug-in works with function plug-ins, and is a very flexible plug-in that can be used to control properties that are not exposed in a specific plug-in, and requires some knowledge in the Viz Artist command language. The parameter to control must be identified by its command path relative to the container the plug-in is located at. To find the correct command path, open the Show Commands window (button in the lower left corner in Viz Artist) and make changes to the parameter to control. The command path is shown among the commands. For instance if the value to be changed is the alpha value in an alpha editor the command window shows the following:

#805 is the internal name for the container and the part needed to expose the alpha parameter (ALPHA * ALPHA). The SET part is added by the plug-in. To expose the alpha parameter for a container write ALPHA * ALPHA in the Parameter section in the plug-in and then set the correct data type which in this case is “Float”.

Another example would be to use Control Parameter to expose and control additional values like controlling both Pie Max and Max Value. These parameters are dependent on each other, but both values are not exposed unless the Control Parameter is used. Adjusting the Pie Max value gives the following:

In this case, the FUNCTION*PieValues*DATA is the parameter that exposes the object property Pie Max such that it can be controlled through a template.