3.5

213MainStage Effects
Tutorial script 11: Slider Creation
In MainStage, type the following in the Script Editor window to create a slider named
“Parameter x” with a default range of 0 to 1. It is set to the mid-point value of 0.5.
var PluginParameters = [{name:"Parameter x", defaultValue:0.5}];
Tutorial script 12: Slider Ranges
In MainStage, type the following in the Script Editor window to create a linear slider type,
with five possible positions (steps), and a range from 0 to 5.
var PluginParameters = [{name:"Octaves", defaultValue:3, minValue:0,
maxValue:5,
numberOfSteps:5, unit:"octaves", type:"lin"}];
Tutorial script 13: Menu Creation
In MainStage, type the following in the Script Editor window to create a menu named
“Range” with the options “Low”, “Mid”, and “High”.
var PluginParameters = [{name:"Range", type:"menu", valueStrings:["Low",
"Mid", "High"]}];
Dynamically hide or show MIDI plug-in controls
In complex MainStage scripts, it may be helpful to hide or show parameter controls
dynamically, such as for a menu item that lets you choose a group of controls to display.
Type the following in the Script Editor window to create these controller types.
• var PluginParameters = [{name:'uno'}, {name:'dos', hidden:true}];
Call UpdatePluginParameters() to change this dynamically.
Retrieve plug-in parameter values
Call GetParameter() with the parameter name to return a value (number object) with the
current value of the parameter. GetParameter() is typically used inside the MainStage
Scripter MIDI plug-in HandleMIDI function or MainStage Scripter MIDI plug-in ProcessMIDI
function.