/ HALion Developer Resource / HALion Script / Class Reference / Element /

Layer

The Layer class inherits all properties and methods of the Element class.

On this page:

appendBus, appendLayer, appendLayerAsync, appendMidiModule, appendZone, findBusses, findEffects, findLayers, findMidiModules, findZones, getBus, getLayer, getMidiModule, getZone, insertBus, insertLayer, insertLayerAsync, insertMidiModule, insertZone, removeBus, removeLayer, removeMidiModule, removeZone, addQCAssignment, removeQCAssignment, getNumQCAssignments, getQCAssignmentParamId, getQCAssignmentScope, getQCAssignmentMin, getQCAssignmentMax, getQCAssignmentCurve, getQCAssignmentMode, getQCAssignmentBypass, setQCAssignmentParamId, setQCAssignmentScope, setQCAssignmentMin, setQCAssignmentMax, setQCAssignmentCurve, setQCAssignmentMode, setQCAssignmentBypass

List of inherited members:

Element

Element Class, findChildren, getChild, getParameter, getParameterDefinition, getParameterNormalized, hasParameter, removeFromParent, setName, setParameter, setParameterNormalized

Constructors

Layer Constructor

Layer()

(Since HALion 6.4.0)

Description

Constructor to create a new Layer object.

Available in: Controller.

Return Values

Returns a new Layer object.

Example

-- The following function creates different types of objects in the Program Tree.
-- The objects in the Program Tree do not have a name. You will see only their icons.

function createProgram()
  local inst = this.program.instance
  local prg = Program()
  local bus = Bus()
  prg:appendBus(bus)
  inst:setProgram(prg, 1)
  local layer = Layer()
  prg:appendLayer(layer)
  layer:appendZone(Zone())
  local mm = MidiModule('MIDI Player')
  layer:appendMidiModule(mm)
  local fx = Effect('Distortion')
  bus:appendEffect(fx)
end
 
createProgram()

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Methods

appendBus

appendBus(bus)

Description

Function to add a bus in the specified destination layer. The destination layer is determined by its Layer object. For example, this.parent specifies the parent layer of the script module as destination layer. The bus to be added is determined by its Bus object. You can use getBus or findBusses to determine the bus. The new bus will be added behind the existing busses. To insert a bus at a specific position in the destination layer, use insertBus instead.

❕ An Element object can only have one parent. It cannot be child of multiple parents. Therefore, an Element object that you retrieved from the running plug-in instance must be removed before it can be inserted again. The Element objects that you retrieve through loadPreset or loadPresetAsync can be inserted freely, because these functions create a copy of the Element objects when reading them.

Available in: Controller.

Arguments

Example

To explore the following script:

1. Download Program.vstpreset.
2. Drag the preset on the MediaBay to import it to the user folder for VST presets.
3. Create an empty program and add a script module.
4. Paste the script into the text editor of the script module and execute the script.

-- Append the bus from Program.vstpreset into the current program.
   
-- Get the file path for user VST presets.
path = getUserPresetPath()
   
-- Load the VST preset.
loadedProgram = loadPreset(path.."/Program/Program.vstpreset")
   
-- Get the first bus from the loaded program.
bus = loadedProgram:getBus()
   
-- Append the bus.
if bus then
    this.program:appendBus(bus)
end

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appendLayer

appendLayer(layer)

Description

Function to add a layer in the specified destination layer. The layer to be added and the destination layer are both determined by their Layer objects. You can use getLayer or findLayers to determine the layer to be added. For example, this.parent defines the parent layer of the script module as destination layer. The new layer will be added behind the existing layers. To insert a layer at a specific position in the destination layer, use insertLayer or insertLayerAsync instead.

❕ An Element object can only have one parent. It cannot be child of multiple parents. Therefore, an Element object that you retrieved from the running plug-in instance must be removed before it can be inserted again. The Element objects that you retrieve through loadPreset or loadPresetAsync can be inserted freely, because these functions create a copy of the Element objects when reading them.

Available in: Controller.

Arguments

Example

To explore the following script:

1. Download Program.vstpreset.
2. Drag the preset on the MediaBay to import it to the user folder for VST presets.
3. Create an empty program and add a script module.
4. Paste the script into the text editor of the script module and execute the script.

-- Append the layer from Program.vstpreset into the current program.
    
-- Get the file path for user VST presets.
path = getUserPresetPath()
    
-- Load the VST preset.
loadedProgram = loadPreset(path.."/Program/Program.vstpreset")
    
-- Get the first layer from the loaded program.
layer = loadedProgram:getLayer ()
    
-- Append the layer.
if layer then
    this.program:appendLayer(layer)
end

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appendLayerAsync

appendLayerAsync(layer, callback)

Description

Function to add a layer in the specified destination layer using a separate, parallel thread. Appending a layer in a separate thread can be necessary if the layer is too big to be added in a short time. The layer to be inserted and the destination layer are both determined by their Layer objects. You can use getLayer or findLayers to determine the layer to be inserted. For example, this.parent determines the parent layer of the script module as destination layer. The new layer will be added behind the existing layers. To insert a layer at a specific position in the destination layer, use insertLayer or insertLayerAsync instead. The function returns a LoadProgress object that can be used to monitor the load progress. After the layer is added, the callback function is called. The callback function gets the LoadProgress object as default argument.

❕ An Element object can only have one parent. It cannot be child of multiple parents. Therefore, an Element object that you retrieved from the running plug-in instance must be removed before it can be inserted again. The Element objects that you retrieve through loadPreset or loadPresetAsync can be inserted freely, because these functions create a copy of the Element objects when reading them.

Available in: Controller.

Arguments

Return Values

Returns a LoadProgress object.

Example

-- Start with an empty program, remove any existing layers.

layers = this.parent:findLayers()
 
if layers then
   for i, layer in ipairs(layers) do
       this.parent:removeLayer(layer)
   end
end
 
-- Table with layer presets from Skylab.
layerPresets = {
   { name = "Ambient Pad 01", path = "vstsound://724ACB205EFF46F885735D1B216C37AD/.AppData/Steinberg/Skylab/Sub Presets/Layer Presets/Ambient Pads/Ambient Pad 01.vstpreset" },
   { name = "Ambient Pad 02", path = "vstsound://724ACB205EFF46F885735D1B216C37AD/.AppData/Steinberg/Skylab/Sub Presets/Layer Presets/Ambient Pads/Ambient Pad 02.vstpreset" },
   { name = "Ambient Pad 03", path = "vstsound://724ACB205EFF46F885735D1B216C37AD/.AppData/Steinberg/Skylab/Sub Presets/Layer Presets/Ambient Pads/Ambient Pad 03.vstpreset" },
   { name = "Ambient Pad 04", path = "vstsound://724ACB205EFF46F885735D1B216C37AD/.AppData/Steinberg/Skylab/Sub Presets/Layer Presets/Ambient Pads/Ambient Pad 04.vstpreset" },
}
-- Create a table with the preset names.
function getPresetNames()
   presetNames = {}
   for i, preset in ipairs(layerPresets) do
       presetNames[i] = preset.name
   end
end
 
getPresetNames()
 
-- Remove the old layer after the new one was added.
function removeOldLayer(progressInfo)
   local newPreset = progressInfo.root
   if oldPreset then
       this.parent:removeLayer(oldPreset)
       print(oldPreset.name.." removed.")
   end
   oldPreset = newPreset
end
 
-- Append the preset in a separate thread.
function appendNewLayer(progressInfo)
   if progressInfo.root then
       this.parent:appendLayerAsync(progressInfo.root, removeOldLayer)
       print("Appending "..progressInfo.root.name.."...")
   end
end
 
-- Load the preset in a separate thread.
function onSelectPresetChanged()
   progress = 0
   progressInf = loadPresetAsync(layerPresets[SelectPreset].path, appendNewLayer)
   print("Loading "..layerPresets[SelectPreset].name.."...")
end
 
-- Define a parameter for selecting the preset to be loaded.
defineParameter("SelectPreset", "Select Preset", 1, presetNames, onSelectPresetChanged)
 
-- Monitor the load progress with onIdle.
progress = 1
function onIdle()
   if progress < 1 then
       progress = progressInf.progress
       print("Progress: "..(progressInf.progress * 100).."%")
   end
end

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appendMidiModule

appendMidiModule(module)

Description

Function to add a MIDI module in the specified destination layer. The destination layer is determined by its Layer object. For example, this.parent specifies the parent layer of the script module as destination layer. The MIDI module to be added is determined by its MidiModule object. You can use getMidiModule or findMidiModules to determine the desired MIDI module. The new MIDI module will be added behind the existing MIDI modules. To insert a MIDI module at a specific position in the destination layer, use insertMidiModule instead.

❕ An Element object can only have one parent. It cannot be child of multiple parents. Therefore, an Element object that you retrieved from the running plug-in instance must be removed before it can be inserted again. The Element objects that you retrieve through loadPreset or loadPresetAsync can be inserted freely, because these functions create a copy of the Element objects when reading them.

Available in: Controller.

Arguments

Example

To explore the following script:

1. Download Program.vstpreset.
2. Drag the preset on the MediaBay to import it to the user folder for VST presets.
3. Create an empty program and add a script module.
4. Paste the script into the text editor of the script module and execute the script.

-- Append a MIDI module from Program.vstpreset into the current program.
    
-- Get the file path for user VST presets.
path = getUserPresetPath()
    
-- Load the VST preset.
loadedProgram = loadPreset(path.."/Program/Program.vstpreset")
    
-- Get the first MIDI module from the loaded program.
module = loadedProgram:getMidiModule()
    
-- Append the MIDI module.
if module then
    this.program:appendMidiModule(module)
end

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appendZone

appendZone(zone)

Description

Function to add a zone in the specified destination layer. The destination layer is determined by its Layer object. For example, this.parent specifies the parent layer of the script module as destination layer. The zone to be added is determined by its Zone object. You can use getZone or findZones to determine the zone. The new zone will be added behind the existing zones. To insert a zone at a specific position in the destination layer, use insertZone instead.

❕ An Element object can only have one parent. It cannot be child of multiple parents. Therefore, an Element object that you retrieved from the running plug-in instance must be removed before it can be inserted again. The Element objects that you retrieve through loadPreset or loadPresetAsync can be inserted freely, because these functions create a copy of the Element objects when reading them.

Available in: Controller, Processor.

Arguments

Example

To explore the following script:

1. Download Program.vstpreset.
2. Drag the preset on the MediaBay to import it to the user folder for VST presets.
3. Create an empty program and add a script module.
4. Paste the script into the text editor of the script module and execute the script.

-- Append a zone from Program.vstpreset into the current program.
    
-- Get the file path for user VST presets.
path = getUserPresetPath()
    
-- Load the VST preset.
loadedProgram = loadPreset(path.."/Program/Program.vstpreset")
    
-- Get the first zone from the loaded program.
zone = loadedProgram:getZone()
    
-- Append the zone.
if zone then
    this.program:appendZone(zone)
end

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findBusses

findBusses(recursive, nameOrFilterFunction)

Description

Function to find busses in the specified Element object. For example, this.parent specifies the parent of the script module as the Element object to be searched in. If recursive is set to true, subelements will also be searched. The function returns an array with the Bus objects of the found busses. Particular busses can be searched by name or via a filter function. If searching by name, findBusses accepts only the Bus objects that match the specified name. The filter function uses the Bus object of each bus as argument. Only those Bus objects that return true for the search criteria defined in the filter function will be accepted by findBusses. Without a name or filter function, the Bus objects of all busses in the searched Element obects will be returned.

Available in: Controller, Processor.

Arguments

Return Values

Returns an array with the Bus objects of the found busses. Returns an empty table if no busses are found.

Example

-- Find all busses and print their names.
busses = this.program:findBusses(true)
 
if busses[1] then
    for i, bus in ipairs(busses) do
        print(bus.name)
    end
else
    print("Could not find any busses!")
end

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findEffects

findEffects(recursive, nameOrFilterFunction)

Description

Function to find effects in the specified Element object. For example, this.parent specifies the parent of the script module as the Element object to be searched in. To specifiy a bus to be searched in, use getBus or findBusses. If recursive is set to true, subelements will also be searched. The function returns an array with the Effect objects of the found effects. Particular effects can be searched by name or via a filter function. If searching by name, findEffects accepts only the Effect objects that match the specified name. The filter function uses the Effect object of each effect as argument. Only those Effect objects that return true for the search criteria defined in the filter function will be accepted by findEffects. Without a name or filter function, the Effect objects of all effects in the searched Element objects will be returned.

Available in: Controller, Processor.

Arguments

Return Values

Returns an array with the Effect objects of the found effects. Returns an empty table if no effects are found.

Example

-- Find all effects and print their names.
effects = this.program:findEffects(true)
 
if effects[1] then
    for i, effect in ipairs(effects) do
        print(effect.name)
    end
else
    print("Could not find any effects!")
end

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findLayers

findLayers(recursive, nameOrFilterFunction)

Description

Function to find layers in the specified layer. For example, this.parent specifies the parent layer of the script module as the layer to be searched in. If recursive is set to true, sublayers will also be searched. The function returns an array with the Layer objects of the found layers. Particular layers can be searched by name or via a filter function. If searching by name, findLayers accepts only the Layer objects that match the specified name. The filter function uses the Layer object of each layer as argument. Only those Layer objects that return true for the search criteria defined in the filter function will be accepted by findLayers. Without a name or filter function, the Layer objects of all layers in the searched layers will be returned.

Available in: Controller, Processor.

Arguments

Return Values

Returns an array with the Layer objects of the found layers. Returns an empty table if no layers are found.

Example

-- Find all layers and print their names.

layers = this.program:findLayers(true)
 
if layers[1] then
    for i, layer in ipairs(layers) do
        print(layer.name)
    end
else
    print("Could not find any layers!")
end

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findMidiModules

findMidiModules(recursive, nameOrFilterFunction)

Description

Function to find MIDI modules in the specified layer. For example, this.parent specifies the parent layer of the script module as the layer to be searched in. If recursive is set to true, sublayers will also be searched. The function returns an array with the MidiModule objects of the found MIDI modules. Particular MIDI modules can be searched by name or via a filter function. If searching by name, findMidiModules accepts only the MidiModule objects that match the specified name. The filter function uses the MidiModule object of each MIDI module as argument. Only those MidiModule objects that return true for the search criteria defined in the filter function will be accepted by findMidiModules. Without a name or filter function, the MidiModule objects of all MIDI modules in the searched layers will be returned.

Available in: Controller, Processor.

Arguments

Return Values

Returns an array with the MidiModule objects of the found MIDI modules. Returns an empty table if no MIDI modules are found.

Example

-- Find all MIDI modules and print their names.

modules = this.program:findMidiModules(true)
 
if modules[1] then
    for i, module in ipairs(modules) do
        print(module.name)
    end
else
    print("Could not find any MIDI modules!")
end

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findZones

findZones(recursive, nameOrFilterFunction)

Description

Function to find zones in the specified layer. For example, this.parent defines the parent layer of the script module as the layer to be searched in. If recursive is set to true, sublayers will also be searched. The function returns an array with the Zone objects of the found zones. Particular zones can be searched by name or via a filter function. If searching by name, findZones accepts only the Zone objects that match the specified name. The filter function uses the Zone object of each zone as argument. Only those Zone objects that return true for the search criteria defined in the filter function will be accepted by findZones. Without a name or filter function, the Zone objects of all zones in the searched layers will be returned.

Available in: Controller, Processor.

Arguments

Return Values

Returns an array with the Zone objects of the found zones. Returns an empty table if no zones are found.

Example

-- Find all zones and print their names.

zones = this.program:findZones(true)
 
if zones[1] then
    for i, zone in ipairs(zones) do
        print(zone.name)
    end
else
    print("Could not find any zones!")
end

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getBus

getBus(nameOrPosition)

Description

Function to retrieve the Bus object of a bus in the specified Element object. For example, this.parent specifies the parent of the script module as the Element object to be searched in. This function does not search in subelements. A particular bus can be searched by name or position. The position is the number indexing the busses in the specified Element object. If several busses share the same name, only the first match will be returned. If no argument is set, the function returns the first bus it finds.

Available in: Controller, Processor.

Arguments

Return Values

Returns the Bus object of the found bus. Returns nil if no bus is found.

Example

-- Locate the first bus in the program and print its name.

bus = this.program:getBus()
 
if bus then
    print(bus.name)
else
    print("Could not find a bus!")
end

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getLayer

getLayer(nameOrPosition)

Description

Function to retrieve the Layer object of a layer in the specified layer. For example, this.parent specifies the parent layer of the script module as the layer to be searched in. The function does not search in sublayers. A particular layer can be searched by name or position. The position is the number indexing the layers in the specified layer. If several layers share the same name, only the first match will be returned. If no argument is set, the function returns the first layer it finds.

Available in: Controller, Processor.

Arguments

Return Values

Returns the Layer object of the found layer. Returns nil if no layer is found.

Example

-- Locate the first layer in the program and print its name.

layer = this.program:getLayer()
 
if layer then
    print(layer.name)
else
    print("Could not find a layer!")
end

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getMidiModule

getMidiModule(nameOrPosition)

Description

Function to retrieve the MidiModule object of a MIDI module in the specified layer. For example, this.parent defines the parent layer of the script module as the layer to be searched in. This function does not search in sublayers. A particular MIDI module can be searched by name or position. The position is the number indexing the MIDI modules in the specified layer. If several MIDI modules share the same name, only the first match will be returned. If no argument is set, the function returns the first MIDI module it finds.

Available in: Controller, Processor.

Arguments

Return Values

Returns the MidiModule object of the found MIDI module. Returns nil if no MIDI module is found.

Example

-- Locate the first MIDI module in the program and print its name.

module = this.program:getMidiModule()
 
if module then
    print(module.name)
else
    print("Could not find a MIDI module!")
end

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getZone

getZone(nameOrPosition)

Description

Function to retrieve the Zone object of a zone in the specified layer. For example, this.parent defines the parent layer of the script module as the layer to be searched in. This function does not search in sublayers. A particular zone can be searched by name or position. The position is the number indexing the zones in the specified layer. If several zones share the same name, only the first match will be returned. If no argument is set, the function returns the first zone it finds.

Available in: Controller, Processor.

Arguments

Return Values

Returns the Zone object of the found zone. Returns nil if no zone is found.

Example

-- Get the first zone in the program and print its name.

zone = this.program:getZone()
 
if zone then
    print(zone.name)
else
    print("Could not find a zone!")
end

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insertBus

insertBus(bus, position)

Description

Function to insert a bus at the specified position in the destination layer. The bus to be inserted is determined by its Bus object. You can use getBus or findBusses to determine the bus. The destination layer is determined by its Layer object. For example, this.parent sets the parent layer of the script module as destination layer. The position is the number indexing the existing busses in the destination layer. The new bus will be inserted before the specified position. To add the bus at the end, use appendBus instead.

❕ An Element object can only have one parent. It cannot be child of multiple parents. Therefore, an Element object that you retrieved from the running plug-in instance must be removed before it can be inserted again. The Element objects that you retrieve through loadPreset or loadPresetAsync can be inserted freely, because these functions create a copy of the Element objects when reading them.

Available in: Controller.

Arguments

Example

To explore the following script:

1. Download Program.vstpreset.
2. Drag the preset on the MediaBay to import it to the user folder for VST presets.
3. Create an empty program and add a script module.
4. Paste the script into the text editor of the script module and execute the script.

-- Insert the bus from Program.vstpreset into the current program.
  
-- Get the file path for user VST presets.
path = getUserPresetPath()
  
-- Load the VST preset.
loadedProgram = loadPreset(path.."/Program/Program.vstpreset")
  
-- Get the first bus from the loaded program.
bus = loadedProgram:getBus()
  
-- Insert the bus.
if bus then
    this.program:insertBus(bus, 1)
end

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insertLayer

insertLayer(layer, position)

Description

Function to insert a layer at a specific position in a destination layer. The layer to be inserted and the destination layer are both determined by their Layer objects. You can use getLayer or findLayers to determine the layer to be inserted. For example, this.parent determines the parent layer of the script module as destination layer. The position is the number indexing the existing layers in the destination layer. The new layer will be inserted before the specified position. To add the layer at the end, use appendLayer or appendLayerAsync instead.

❕ An Element object can only have one parent. It cannot be child of multiple parents. Therefore, an Element object that you retrieved from the running plug-in instance must be removed before it can be inserted again. The Element objects that you retrieve through loadPreset or loadPresetAsync can be inserted freely, because these functions create a copy of the Element objects when reading them.

Available in: Controller.

Arguments

Example

To explore the following script:

1. Download Program.vstpreset.
2. Drag the preset on the MediaBay to import it to the user folder for VST presets.
3. Create an empty program and add a script module.
4. Paste the script into the text editor of the script module and execute the script.

-- Insert a layer from Program.vstpreset into the current program.
   
-- Get the file path for user VST presets.
path = getUserPresetPath()
   
-- Load the VST preset.
loadedProgram = loadPreset(path.."/Program/Program.vstpreset")
   
-- Get the first layer from the loaded program.
layer = loadedProgram:getLayer ()
   
-- Insert the layer.
if layer then
    this.program:insertLayer(layer, 1)
end

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insertLayerAsync

insertLayerAsync(layer, position, callback)

Description

Function to insert a layer at a specified position in a destination layer using a separate, parallel thread. Inserting a layer in a separate thread can be necessary if the layer is too big to be inserted in a short time. The layer to be inserted and the destination layer are both determined by their Layer objects. You can use getLayer or findLayers to determine the layer to be inserted. For example, this.parent determines the parent layer of the script module as destination layer. The position is the number indexing the existing layers in the destination layer. The new layer will be inserted before the specified position. To add the layer at the end, use appendLayer or appendLayerAsync instead. The function returns a LoadProgress object that can be used to monitor the load progress. After the layer is inserted, the callback function is called. The callback function gets the LoadProgress object as default argument.

❕ An Element object can only have one parent. It cannot be child of multiple parents. Therefore, an Element object that you retrieved from the running plug-in instance must be removed before it can be inserted again. The Element objects that you retrieve through loadPreset or loadPresetAsync can be inserted freely, because these functions create a copy of the Element objects when reading them.

Available in: Controller.

Arguments

Return Values

Returns a LoadProgress object.

Example

-- Start with an empty program, remove all existing layers.
layers = this.parent:findLayers()
 
if layers then
  for i, layer in ipairs(layers) do
      this.parent:removeLayer(layer)
  end
end
 
-- Table with layer presets from Skylab.
layerPresets = {
  { name = "Ambient Pad 01", path = "vstsound://EB86867EFF8E44FEA8FE366F676E25BE/.AppData/Steinberg/Skylab/Sub Presets/Layer Presets/Ambient Pads/Ambient Pad 01.vstpreset" },
  { name = "Ambient Pad 02", path = "vstsound://EB86867EFF8E44FEA8FE366F676E25BE/.AppData/Steinberg/Skylab/Sub Presets/Layer Presets/Ambient Pads/Ambient Pad 02.vstpreset" },
  { name = "Ambient Pad 03", path = "vstsound://EB86867EFF8E44FEA8FE366F676E25BE/.AppData/Steinberg/Skylab/Sub Presets/Layer Presets/Ambient Pads/Ambient Pad 03.vstpreset" },
  { name = "Ambient Pad 04", path = "vstsound://EB86867EFF8E44FEA8FE366F676E25BE/.AppData/Steinberg/Skylab/Sub Presets/Layer Presets/Ambient Pads/Ambient Pad 04.vstpreset" },
}
 
-- Create a table with the preset names.
function getPresetNames()
  presetNames = {}
  for i, preset in ipairs(layerPresets) do
    presetNames[i] = preset.name
  end
end
 
getPresetNames()
 
-- Remove the old layer after the new one was added.
function removeOldLayer(progressInfo)
  local newPreset = progressInfo.root
  if oldPreset then
    this.parent:removeLayer(oldPreset)
    print(oldPreset.name.." removed.")
  end
  oldPreset = newPreset
end
 
-- Insert the preset in a separate thread.
function insertNewLayer(progressInfo)
  if progressInfo.root then
    this.parent:insertLayerAsync(progressInfo.root, 1, removeOldLayer)
    print("Inserting "..progressInfo.root.name.."...")
  end
end
 
-- Load the preset in a separate thread.
function onSelectPresetChanged(layerPreset)
  loadPresetAsync(layerPreset.path, insertNewLayer)
  print("Loading "..layerPreset.name.."...")
end
 
-- Define a parameter for selecting the preset to be loaded.
defineParameter("SelectPreset",  "Select Preset",  1, presetNames, function() onSelectPresetChanged(layerPresets[SelectPreset]) end)

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insertMidiModule

insertMidiModule(module, position)

Description

Function to insert a MIDI module at the specified position in the determined destination layer. The MIDI module to be inserted is determined by its MidiModule object. You can use getMidiModule or findMidiModules to determine the desired MIDI module. The destination layer is determined by its Layer object. For example, this.parent determines the parent layer of the script module as destination layer. The position is the number indexing the existing MIDI modules in the destination layer. The new MIDI module will be inserted before the specified position. To add the MIDI module at the end, use appendMidiModule instead.

❕ An Element object can only have one parent. It cannot be child of multiple parents. Therefore, an Element object that you retrieved from the running plug-in instance must be removed before it can be inserted again. The Element objects that you retrieve through loadPreset or loadPresetAsync can be inserted freely, because these functions create a copy of the Element objects when reading them.

Available in: Controller.

Arguments

Example

To explore the following script:

1. Download Program.vstpreset.
2. Drag the preset on the MediaBay to import it to the user folder for VST presets.
3. Create an empty program and add a script module.
4. Paste the script into the text editor of the script module and execute the script.

-- Insert a MIDI module from Program.vstpreset into the current program.
   
-- Get the file path for user VST presets.
path = getUserPresetPath()
   
-- Load the VST preset.
loadedProgram = loadPreset(path.."/Program/Program.vstpreset")
   
-- Get the first MIDI module from the loaded program.
module = loadedProgram:getMidiModule()
   
-- Insert the MIDI module.
if module then
    this.program:insertMidiModule(module, 1)
end

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insertZone

insertZone(zone, position)

Description

Function to insert a zone at the specified position in the determined layer. The zone to be inserted is determined by its Zone object. You can use getZone or findZones to determine the desired zone. The destination layer is determined by its Layer object. For example, this.parent determines the parent layer of the script module as destination layer. The position is the number indexing the existing zones in the destination layer. The new zone will be inserted before the specified position. To add the zone at the end, use appendZone instead.

❕ An Element object can only have one parent. It cannot be child of multiple parents. Therefore, an Element object that you retrieved from the running plug-in instance must be removed before it can be inserted again. The Element objects that you retrieve through loadPreset or loadPresetAsync can be inserted freely, because these functions create a copy of the Element objects when reading them.

Available in: Controller.

Arguments

Example

To explore the following script:

1. Download Program.vstpreset.
2. Drag the preset on the MediaBay to import it to the user folder for VST presets.
3. Create an empty program and add a script module.
4. Paste the script into the text editor of the script module and execute the script.

-- Insert a zone from Program.vstpreset into the current program.
   
-- Get the file path for user VST presets.
path = getUserPresetPath()
   
-- Load the VST preset.
loadedProgram = loadPreset(path.."/Program/Program.vstpreset")
   
-- Get the first zone from the loaded program.
zone = loadedProgram:getZone()
   
-- Insert the zone.
if zone then
    this.program:insertZone(zone, 1)
end

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removeBus

removeBus(busOrPosition)

Description

Function to remove a bus from the specified layer. For example, this.parent specifies the parent layer of the script module as the layer that contains the bus. The bus to be removed is determined by its Bus object or its position. You can use getBus or findBusses to determine the Bus object. The position is the number that indexes the busses in the specified layer.

Available in: Controller.

Arguments

Example

-- Remove all busses from the program.
    
busses = this.program:findBusses(true)

for i, bus in ipairs(busses) do
    this.parent:removeBus(bus)
end

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removeLayer

removeLayer(layerOrPosition)

Description

Function to remove a layer from the specified layer. For example, this.parent specifies the parent layer of the script module as the layer that contains the layer to be removed. The layer is determined by its Layer object or its position. You can use getLayer or findLayers to determine the Layer object. The position is the number indexing the layers within the specified layer.

Available in: Controller.

Arguments

Example

-- Remove all layers from the program.

layers = this.program:findLayers(true)

for i, layer in ipairs(layers) do
    layer.parent:removeLayer(layer)
end

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removeMidiModule

removeMidiModule(moduleOrPosition)

Description

Function to remove a MIDI module from the specified layer. For example, this.parent specifies the parent layer of the script module as the layer that contains the MIDI module. The MIDI module to be removed is determined by its MidiModule object or its position. You can use getMidiModule or findMidiModules to determine the MidiModule object. The position is the number that indexes the MIDI modules in the specified layer.

Available in: Controller.

Arguments

Example

-- Remove all MIDI modules from the program except the script module.

modules = this.program:findMidiModules(true)

for i, module in ipairs(modules) do
    if module ~= this then -- Exclude script module.
        module.parent:removeMidiModule(module)
    end
end

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removeZone

removeZone(zoneOrPosition)

Description

Function to remove a zone from the specified layer. For example, this.parent specifies the parent layer of the script module as the layer that contains the zone. The zone to be removed is determined by its Zone object or its position. You can use getZone or findZones to determine the Zone object. The position is the number that indexes the zones in the specified layer.

Available in: Controller.

Arguments

Example

-- Remove all zones from the program.

zones = this.program:findZones(true)

for i, zone in ipairs(zones) do
    zone.parent:removeZone(zone)
end

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addQCAssignment

addQCAssignment(qc, element, nameOrID, scope)

Description

Function to add a quick control assignment to the specified layer and quick control. For example, this.parent defines the parent layer of the script module as the layer that contains the quick control that you want to edit. The quick control assignment will be added to the quick control with the index stated by the qc argument. The arguments element and nameOrID specify the parameter to be connected. The scope determines the part of the program that will be affected by the quick control assignment. You specify the scope by setting the scope argument to the Element object that corresponds to the desired part of the program.

❕ The index of the quick controls starts counting from 1. QC 1 to QC 8 have index 1 to 8. Sphere H, Sphere V and Mod Wheel have index 9, 10 and 11.

Available in: Controller.

Arguments

Example

-- Assign the octave parameter of the zone to the
-- first quick control of the script module's parent layer.

layer = this.parent
zones = layer:findZones(true)
 
layer:addQCAssignment(1, zones[1], "Pitch.Octave", layer)

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removeQCAssignment

removeQCAssignment(qc, assignment)

Description

Function to remove a quick control assignment from the specified layer and quick control. For example, this.parent defines the parent layer of the script module as the layer that contains the quick control. The qc argument is the index of the quick control with the assignment to be removed. The assignment argument is the index of the quick control assignment to be removed. The indices of the quick controls and the assignments both start counting from 1.

Available in: Controller.

Arguments

Example

-- Remove all quick control assignments from the specified layer and qc.
 
function clearQC(layer, qc)
    local assignments = layer:getNumQCAssignments(qc)
    if assignments > 0 then
        for i = assignments, 1, -1 do
            layer:removeQCAssignment(qc, i)
        end
        print(assignments.." assignments have been removed from '"..layer.name.."', QC "..qc..".")
    else
        print("No assignments found on '"..layer.name.."', QC "..qc..".")
    end
end
 
clearQC(this.parent, 1)

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getNumQCAssignments

getNumQCAssignments(qc)

Description

Function to retrieve the number of assignments of a quick control on the specified layer. For example, this.parent defines the parent layer of the script module as the layer with the desired quick control. The qc argument is the index of the quick control with the requested assignments.

Available in: Controller.

Arguments

Return Values

Returns the number of assignments of the specified layer and quick control.

Example

-- Print the number of assignments of the first quick control on the parent layer.

layer = this.parent
qc = 1
 
print("Number of assignments on '"..layer.name.."', QC "..qc..": "..layer:getNumQCAssignments(qc)..".")

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getQCAssignmentParamId

getQCAssignmentParamId(qc, assignment)

Description

Function to retrieve the parameter ID of the parameter that is connected to the specified quick control assignment. The quick control assignment is determined by the Layer object, the index of the quick control and the index of the assignment itself. For example, this.parent defines the parent layer of the script module as the layer that contains the quick control. The qc argument is the index of the quick control and the assignment argument is the index of the assignment with the requested parameter. The indices of the quick controls and the assignments both start counting from 1.

Available in: Controller.

Arguments

Return Values

Returns the parameter ID of the parameter connected to the specified quick control assignment.

Example

-- Print the parameter ID of the parameter connected to the qc assignment.

layer = this.parent
qc = 1
assignment = 1
 
paramID = layer:getQCAssignmentParamId(qc, assignment)
 
print("Parameter ID of '"..layer.name.."', QC "..qc..", assignment "..assignment..": "..paramID..".")

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getQCAssignmentScope

getQCAssignmentScope(qc, assignment)

Description

Function to retrieve the Element object that is set as scope for the specified quick control assignment. The quick control assignment is determined by the Layer object of the layer, the index of the quick control and the index of the assignment itself. For example, this.parent defines the parent layer of the script module as the layer that contains the quick control. The qc argument is the index of the quick control and the assignment argument is the index of the assignment with the requested scope. The indices of the quick controls and the assignments both start counting from 1.

Available in: Controller.

Arguments

Return Values

Returns the element object that is set as scope for the specified quick control assignment.

Example

-- Print the scope for the qc assignment.

layer = this.parent
qc = 1
assignment = 1
 
scope = layer:getQCAssignmentScope(qc, assignment).name -- use only the name of the returned element
 
print("Scope of '"..layer.name.."', QC "..qc..", assignment "..assignment..": "..scope..".")

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getQCAssignmentMin

getQCAssignmentMin(qc, assignment)

Description

Function to retrieve the minimum value of the specified quick control assignment. The quick control assignment is determined by the Layer object, the index of the quick control and the index of the assignment itself. For example, this.parent defines the parent layer of the script module as the layer that contains the quick control. The qc argument is the index of the quick control and the assignment argument is the index of the assignment with the requested minimum value. The indices of the quick controls and the assignments both start counting from 1.

Available in: Controller.

Arguments

Return Values

Returns the minimum value of the specified quick control assignment.

❕ The value range is always 0 to 100 %, even if the mode of the quick control assignment is set to Relative or Switch Relative.

Example

-- Print the minimum value of the qc assignment as displayed in HALion.
layer = this.parent
qc = 1
assignment = 1
 
qcMode = layer:getQCAssignmentMode(qc, assignment)
qcMin = layer:getQCAssignmentMin(qc, assignment)
 
-- Convert to bipolar range if the qc is of the type relative or switch relative.
if (qcMode == QCAssignmentMode.relative or qcMode == QCAssignmentMode.switchRelative) then
    qcMin = qcMin * 2 - 100
end
  
print("Minimum value of '"..layer.name.."', QC "..qc..", assignment "..assignment..": "..qcMin..".")

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getQCAssignmentMax

getQCAssignmentMax(qc, assignment)

Description

Function to retrieve the maximum value of the specified quick control assignment. The quick control assignment is determined by the Layer object, the index of the quick control and the index of the assignment itself. For example, this.parent defines the parent layer of the script module as the layer that contains the quick control. The qc argument is the index of the quick control and the assignment argument is the index of the assignment with the requested maximum value. The indices of the quick controls and the assignments both start counting from 1.

Available in: Controller.

Arguments

Return Values

Returns the maximum value of the specified quick control assignment.

❕ The value range is always 0 to 100 %, even if the mode of the quick control assignment is set to Relative or Switch Relative.

Example

-- Print the maximum value of the qc assignment as displayed in HALion.

layer = this.parent
qc = 1
assignment = 1
  
qcMode = layer:getQCAssignmentMode(qc, assignment)
qcMax = layer:getQCAssignmentMax(qc, assignment)
  
-- Convert to bipolar range if the qc is of the type relative or switch relative.

if (qcMode == QCAssignmentMode.relative or qcMode == QCAssignmentMode.switchRelative) then
    qcMax = qcMax * 2 - 100
end
   
print("Maximum value of '"..layer.name.."', QC "..qc..", assignment "..assignment..": "..qcMax..".")

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getQCAssignmentCurve

getQCAssignmentCurve(qc, assignment)

Description

Function to retrieve the curve value of the specified quick control assignment. The quick control assignment is determined by the Layer object, the index of the quick control and the index of the assignment itself. For example, this.parent defines the parent layer of the script module as the layer that contains the quick control. The qc argument is the index of the quick control and the assignment argument is the index of the assignment with the requested curve value. The indices of the quick controls and the assignments both start counting from 1.

Available in: Controller.

Arguments

Return Values

Returns the curve value of the specified quick control assignment. The value range is -100% to +100%.

Example

-- Print the curve value of the qc assignment.

layer = this.parent
qc = 1
assignment = 1
  
qcCurve = layer:getQCAssignmentCurve(qc, assignment)
   
print("Curve value of '"..layer.name.."', QC "..qc..", assignment "..assignment..": "..qcCurve..".")

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getQCAssignmentMode

getQCAssignmentMode(qc, assignment)

Description

Function to retrieve the mode that is set for the specified quick control assignment. The quick control assignment is determined by the Layer object, the index of the quick control and the index of the assignment itself. For example, this.parent defines the parent layer of the script module as the layer that contains the quick control. The qc argument is the index of the quick control and the assignment argument is the index of the assignment with the requested mode. The indices of the quick controls and the assignments both start counting from 1.

Available in: Controller, Processor.

Arguments

Return Values

Returns the mode that is set for the specified quick control assignment as a number. The mode can be determined via names or indices. See Quick Control Assignment Modes for details.

Example

-- Print the mode of the qc assignment.
layer = this.parent
qc = 1
assignment = 1
   
qcMode = layer:getQCAssignmentMode(qc, assignment)
  
if qcMode == QCAssignmentMode.absolute then
    qcModeName = "Absolute"
elseif qcMode == QCAssignmentMode.relative then
    qcModeName = "Relative"
elseif qcMode == QCAssignmentMode.switch then
    qcModeName = "Switch"
elseif qcMode == QCAssignmentMode.switchRelative then
    qcModeName = "Switch Relative"
end
    
print("Mode of '"..layer.name.."', QC "..qc..", assignment "..assignment..": "..qcModeName..".")

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getQCAssignmentBypass

getQCAssignmentBypass(qc, assignment)

Description

Function to retrieve the bypass state of the specified quick control assignment. The quick control assignment is determined by the Layer object, the index of the quick control and the index of the assignment itself. For example, this.parent defines the parent layer of the script module as the layer that contains the quick control. The qc argument is the index of the quick control and the assignment argument is the index of the assignment with the requested bypass state. The indices of the quick controls and the assignments both start counting from 1.

Available in: Controller.

Arguments

Return Values

Returns the bypass state of the specified quick control assignment as boolean value.

Example

-- Print the bypass state of the qc assignment.

layer = this.parent
qc = 1
assignment = 1
   
qcBypass = layer:getQCAssignmentBypass(qc, assignment)
    
print("Bypass of '"..layer.name.."', QC "..qc..", assignment "..assignment..": "..tostring(qcBypass)..".")

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setQCAssignmentParamId

setQCAssignmentParamId(qc, assignment, paramID)

Description

Function to set the parameter ID for connecting the corresponding parameter to the specified quick control assignment. The quick control assignment is determined by the Layer object, the index of the quick control and the index of the assignment itself. For example, this.parent defines the parent layer of the script module as the layer that contains the quick control. The qc argument is the index of the quick control and the assignment argument is the index of the assignment. The indices of the quick controls and the assignments both start counting from 1. The paramID argument selects the parameter to be connected with the quick control assignment.

Available in: Controller.

Arguments

Example

-- Connect the coarse parameter of the zone to the specified quick control assignment.

layer = this.parent
zones = layer:findZones(true)
zone = zones[1]
qc = 1
assignment = 1
coarseParamID = zone:getParameterDefinition("Pitch.Coarse").id
  
layer:setQCAssignmentParamId(qc, assignment, coarseParamID)

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setQCAssignmentScope

setQCAssignmentScope(qc, assignment, scope)

Description

Function to set the scope for the specified quick control assignment. The quick control assignment is determined by the Layer object, the index of the quick control and the index of the assignment itself. For example, this.parent defines the parent layer of the script module as the layer that contains the quick control. The qc argument is the index of the quick control and the assignment argument is the index of the assignment. The indices of the quick controls and the assignments both start counting from 1. The scope is defined by the Element object that you assign to the scope argument.

Available in: Controller.

Arguments

Example

-- Set the scope to the first zone that was found.

layer = this.parent
zones = layer:findZones(true)
zone = zones[1]
qc = 1
assignment = 1
   
layer:setQCAssignmentScope(qc, assignment, zone)

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setQCAssignmentMin

setQCAssignmentMin(qc, assignment, min)

Description

Function to set the minimum value of the specified quick control assignment. The quick control assignment is determined by the Layer object, the index of the quick control and the index of the assignment itself. For example, this.parent defines the parent layer of the script module as the layer that contains the quick control. The qc argument is the index of the quick control and the assignment argument is the index of the assignment. The indices of the quick controls and the assignments both start counting from 1. The min argument sets the minimum value of the quick control assignment.

Available in: Controller.

Arguments

❕ The value range is always 0 to 100 %, even if the mode of the quick control assignment is set to Relative or Switch Relative.

Example

-- Set the minimum value of the quick control assignment depending on the mode.

layer = this.parent
qc = 1
assignment = 1
 
qcMode = layer:getQCAssignmentMode(qc, assignment)
 
if (qcMode == QCAssignmentMode.relative or qcMode == QCAssignmentMode.switchRelative) then
    qcMin = 25
else
    qcMin = 0
end
   
layer:setQCAssignmentMin(qc, assignment, qcMin)

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setQCAssignmentMax

setQCAssignmentMax(qc, assignment max)

Description

Function to set the maximum value of the specified quick control assignment. The quick control assignment is determined by the Layer object, the index of the quick control and the index of the assignment itself. For example, this.parent defines the parent layer of the script module as the layer that contains the quick control. The qc argument is the index of the quick control and the assignment argument is the index of the assignment. The indices of the quick controls and the assignments both start counting from 1. The max argument sets the maximum value of the quick control assignment.

Available in: Controller.

Arguments

❕ The value range is always 0 to 100 %, even if the mode of the quick control assignment is set to Relative or Switch Relative.

Example

-- Set the maximum value of the quick control assignment depending on the mode.

layer = this.parent
qc = 1
assignment = 1
  
qcMode = layer:getQCAssignmentMode(qc, assignment)
  
if (qcMode == QCAssignmentMode.relative or qcMode == QCAssignmentMode.switchRelative) then
    qcMax = 75
else
    qcMax = 100
end
    
layer:setQCAssignmentMax(qc, assignment, qcMax)

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setQCAssignmentCurve

setQCAssignmentCurve(qc, assignment, curve)

Description

Function to set the curve value of the specified quick control assignment. The quick control assignment is determined by the Layer object, the index of the quick control and the index of the assignment itself. For example, this.parent defines the parent layer of the script module as the layer that contains the quick control. The qc argument is the index of the quick control and the assignment argument is the index of the assignment. The indices of the quick controls and the assignments both start counting from 1. The curve argument sets the curve value of the quick control assignment.

Available in: Controller.

Arguments

Example

-- Set the curve of the quick control assignment to -100 %.

layer = this.parent
qc = 1
assignment = 1
   
layer:setQCAssignmentCurve(qc, assignment, -100)

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setQCAssignmentMode

setQCAssignmentMode(qc, assignment, mode)

Description

Function to set the mode of the specified quick control assignment. The quick control assignment is determined by the Layer object, the index of the quick control and the index of the assignment itself. For example, this.parent defines the parent layer of the script module as the layer that contains the quick control. The qc argument is the index of the quick control and the assignment argument is the index of the assignment. The indices of the quick controls and the assignments both start counting from 1. The mode argument sets the mode of the quick control assignment.

Available in: Controller.

Arguments

Example

-- Set the mode of the quick control assignment to absolute and adjust min and max to full range.

layer = this.parent
qc = 1
assignment = 1
    
layer:setQCAssignmentMode(qc, assignment, QCAssignmentMode.absolute)
layer:setQCAssignmentMin(qc, assignment, 0)
layer:setQCAssignmentMax(qc, assignment, 100)

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setQCAssignmentBypass

setQCAssignmentBypass(qc, assignment, bypass)

Description

Function to set the bypass state of the specified quick control assignment. The quick control assignment is determined by the Layer object, the index of the quick control and the index of the assignment itself. For example, this.parent defines the parent layer of the script module as the layer that contains the quick control. The qc argument is the index of the quick control and the assignment argument is the index of the assignment. The indices of the quick controls and the assignments both start counting from 1. The bypass argument sets the bypass state of the quick control assignment.

Available in: Controller.

Arguments

Example

-- Bypass the specified quick control assignment.

layer = this.parent
qc = 1
assignment = 1
    
layer:setQCAssignmentBypass(qc, assignment, true)

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