@bottobot/td-mcp
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TouchDesigner MCP Server v2.8.0 - 21 MCP tools, 629 operators with clean parameter data, 69 Python API classes, 14 tutorials, 32 workflow patterns. Includes version system, experimental techniques KB, core tool enhancements, and experimental build support
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{
"id": "constant_chop",
"name": "Constant CHOP",
"displayName": "Constant CHOP",
"category": "CHOP",
"subcategory": "Generators",
"version": "Available since TouchDesigner 2018+",
"lastUpdated": "2025-08-07T07:49:58.727Z",
"sourceFile": "C:\\Program Files\\Derivative\\TouchDesigner\\Samples\\Learn\\OfflineHelp\\https.docs.derivative.ca\\Constant_CHOP.htm",
"url": "",
"description": "The Constant CHOP creates new constant-value channels. Each channel can be named and assigned a different value. To create a channel, simply enter a channel name in a name parameter on the Constant page, then adjust the below value.",
"summary": "The Constant CHOP creates new constant-value channels. Each channel can be named and assigned a different value. To create a channel, simply enter a channel name in a name parameter on the Constant pa",
"details": "",
"usage": "",
"tips": [
"Use Constant CHOP to define named channels with static values for parameter driving.",
"Great as a starting point for expressions and exports.",
"Name channels to match target parameters for easy auto-export (e.g., 'tx', 'ty', 'tz')."
],
"warnings": [],
"parameters": [
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"name": "Constant",
"label": "Constant",
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"description": "Parameter of this operator. See operator description for details.",
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"id": null,
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"label": "Name",
"group": "General",
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"description": "const0name - The name of the channel.",
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"name": "Value",
"label": "Value",
"group": "General",
"page": "",
"type": "float",
"dataType": "number",
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"description": "const0value - The value of the channel.",
"tooltip": "",
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"isReadOnly": false,
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"id": null,
"name": "Snapshot Input",
"label": "Snapshot Input",
"group": "General",
"page": "",
"type": "float",
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"description": "snap - The optional first input on Constant is used when the Snapshot Input button is pressed. At this time, the channel names and values at the input at the current frame are used to initialize the channel names and values of the constant sliders.\t\nTo snap channels from other OPs, connect a Parameter to the Constant and hit Snapshot Input.\t\t\t\nYou can simulate the pressing of the Snapshot Input button from a script. To simulate the clicking of a dialog box button from a script use the Par Class pulse() Method:\nExample:",
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"label": "First Channel",
"group": "General",
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"description": "first - The First Channel parameter is used to select a smaller set of the incoming channels. This is useful if the number of incoming channels is greater than the 40 channels the Constant can hold, and you must break it into several CHOPs.",
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"name": "Active Needs Current",
"label": "Active Needs Current",
"group": "General",
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"description": "current - This is used with the second input as described above, when you want to add a displacement to channels by using external devices or sources.\t\nWhen Active Needs Current is On, the second input (the Active input) has an effect only if the Constant is the current .\nWhen Active Needs Current is Off, the Constant is affected any time the Active input is on (greater than 0).\nThis is used by the Channel Editor when editing keyframes using CHOPs. An input device like a button in the Keyboard In or a MIDI keyboard can be fed to the Active input of many Constant CHOPs. Only the current will be affected if this option is On.",
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"name": "Single Sample",
"label": "Single Sample",
"group": "General",
"page": "",
"type": "float",
"dataType": "number",
"style": "",
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"description": "single - Turn this Off to make constant channels that are longer than one .",
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"label": "Start",
"group": "General",
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"type": "float",
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"description": "start - Start and end of the interval, expressed in Units (seconds, frames or samples). The parameters are expressed in the Units found on the Common page. To set the to be 100 samples long, Set Units to Samples, Single Off and Start / End to 0 and 99.",
"tooltip": "",
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"label": "Start Unit",
"group": "General",
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"description": "startunit - - Select the units to use for this parameter, Samples, Frames, or Seconds.\n\n samples - frames - seconds -",
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"isReadOnly": false,
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"name": "I",
"label": "I",
"group": "General",
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"description": "samples - frames - seconds -",
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"label": "End",
"group": "General",
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"description": "end - Start and end of the interval, expressed in Units (seconds, frames or samples). The parameters are expressed in the Units found on the Common page. To set the to be 100 samples long, Set Units to Samples, Single Off and Start / End to 0 and 99.",
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"isReadOnly": false,
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"description": "endunit - - Select the units to use for this parameter, Samples, Frames, or Seconds.\n\n samples - frames - seconds -",
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"isReadOnly": false,
"isAdvanced": false,
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"name": "Sample Rate",
"label": "Sample Rate",
"group": "General",
"page": "",
"type": "float",
"dataType": "number",
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"description": "rate - The sample rate of the channels, in samples per second.",
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"isReadOnly": false,
"isAdvanced": false,
"isHidden": false,
"isAnimatable": true,
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"id": null,
"name": "Extend Left",
"label": "Extend Left",
"group": "General",
"page": "",
"type": "float",
"dataType": "number",
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"description": "left - - The left extend conditions (before range).\n\n hold - Hold the current value of the channel. slope - Continue the slope before the start of the channel. cycle - Cycle the channel repeatedly. mirror - Cycle the channel repeatedly, mirroring every other cycle. default - Use the constant value specified in the Default Value parameter.",
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"isReadOnly": false,
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"name": "Hold",
"label": "Hold",
"group": "General",
"page": "",
"type": "float",
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"description": "hold - Hold the current value of the channel. slope - Continue the slope before the start of the channel. cycle - Cycle the channel repeatedly. mirror - Cycle the channel repeatedly, mirroring every other cycle. default - Use the constant value specified in the Default Value parameter.",
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"isReadOnly": false,
"isAdvanced": false,
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"isAnimatable": true,
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"name": "Extend Right",
"label": "Extend Right",
"group": "General",
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"description": "right - - The right extend conditions (after range).\n\n hold - Hold the current value of the channel. slope - Continue the slope after the end of the channel. cycle - Cycle the channel repeatedly. mirror - Cycle the channel repeatedly, mirroring every other cycle. default - Use the constant value specified in the Default Value parameter.",
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"isReadOnly": false,
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"name": "Default Value",
"label": "Default Value",
"group": "General",
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"description": "defval - The value used for the Default Value extend condition.",
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{
"id": null,
"name": "Time Slice",
"label": "Time Slice",
"group": "General",
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"type": "float",
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"description": "timeslice - Turning this on forces the channels to be \"Time Sliced\". A is the time between the last cook frame and the current cook frame.",
"tooltip": "",
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"isReadOnly": false,
"isAdvanced": false,
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{
"id": null,
"name": "Scope",
"label": "Scope",
"group": "General",
"page": "",
"type": "float",
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"description": "scope - To determine which channels get affected, some CHOPs use a string on the Common page.",
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"id": null,
"name": "Sample Rate Match",
"label": "Sample Rate Match",
"group": "General",
"page": "",
"type": "float",
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