CHOP Execute DAT
The CHOP Execute DAT will run its script when the channel values of a specified CHOP change. You can specify which channels to look at, and trigger based on their values changing in various ways. The script gets called for every sample that changes, so when rendering one frame, it may get called 2 or more times per channel, depending on how many frames forward TouchDesigner has stepped (see Time Slicing).
CHOP Execute DATs are created with default python method placeholders. For each monitored condition in the parameters, there is a matching python method in the DAT. When a condition is turned on in the parameters, each time that condition is satisfied the corresponding python method will be executed.
Parameters - CHOP Execute Page
active - While on, the DAT will respond to the CHOP that is referenced.
executeloc - ⊞ - (Tscript only) Determines the location the script is run from.
- Current Node
current- (Tscript only) The script is executed from the current node location.
- This Node
here- The script is executed from the parent of the DAT. The DAT executes from the parent to make siblings of the DAT easy to access: DAT scripts used to execute from inside the DAT.
- Specified Operator
op- The script is executed from the component specified in the Component parameter below.
fromop - The path that the script will be executed from if the Execute From parameter is set to Specified Operator.
chop - The CHOP whose channel change will trigger the DAT to execute its script.
channel - Which channel will trigger change.
Off to On
offtoon - The onOffToOn() method executes when the channel specified switches from off to on, called at the first "on" frame.
whileon - The whileOn() method executes when the channel specified is on. It is called once each frame.
On to Off
ontooff - The onOnToOff() method executes when the channel specified switches from on to off, called at the first "off" frame.
whileoff - The whileOff() method executes when the channel specified is off. It is called once each frame.
valuechange - The onValueChange() method executes when the channel specified changes value in any way. It is called once each frame.
While Off/On Frequency
freq - ⊞ - Enabled when using the While On or While Off options above. Determines if the DAT executes For Every Sample or Once Per Frame.
- Execute For Every Sample
- Execute Once Per Frame
edit - Clicking this opens a text editor to edit text in the DAT.
Parameters - Common Page
language - ⊞ - Select how the DAT decides which script language to operate on.
input- The DAT uses the inputs script language.
node- The DAT uses it's own script language.
extension - ⊞ - Select the file extension this DAT should expose to external editors.
dat- various common file extensions.
- From Language
language- pick extension from DATs script language.
- Custom Extension
custom- Specify a custom extension.
customext - Specifiy the custom extension.
wordwrap - ⊞ - Enable Word Wrap for Node Display.
input- The DAT uses the inputs setting.
on- Turn on Word Wrap.
off- Turn off Word Wrap.
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Any of the procedural data operators. OPs do all the work in TouchDesigner. They "cook" and output data to other OPs, which ultimately result in new images, data and audio being generated. See Node.