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  2. CHOP Execute DAT

    CHOP Execute DAT

    Summary

    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.

    PythonIcon.pngchopexecuteDAT_Class


    Parameters - CHOP Execute Page

    Active active - While on, the DAT will respond to the CHOP that is referenced.

    Execute from 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.

    From Operator fromop - The path that the script will be executed from if the Execute From parameter is set to Specified Operator.

    CHOP chop - The CHOP whose channel change will trigger the DAT to execute its script.

    Channel 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.

    While On 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.

    While Off whileoff - The whileOff() method executes when the channel specified is off. It is called once each frame.

    Value Change 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 everysample -
    • Execute Once Per Frame onceperframe -

    Edit.. edit - Clicking this opens a text editor to edit text in the DAT.


    Parameters - File Page

    File file - The filesystem path and name of the file to load. Accepts .txt and .dat files.

    Sync to File syncfile - When On, loads the file from disk into the DAT when the projects starts. A filename must be specified. Turning on the option will load the file from disk immediately. If the file does not exist, it will be created the first time the DAT is updated. The file is monitored so that any changes made to the file will update the DAT, and any changes made to the DAT will be written to the file right away. If the file is removed, the DAT will retain its current contents.

    Load on Start loadonstart - When On, reloads the file from disk into the DAT when the projects starts.

    Load File loadonstartpulse - Instantly reloads the file.

    Write on Toe Save write - When On, writes the contents of the DAT out to the file on disk when the project is saved.

    Write File writepulse - Instantly write the file to disk.


    Parameters - Common Page

    Language language - ⊞ - Select how the DAT decides which script language to operate on.
    • Input input - The DAT uses the inputs script language.
    • Node node - The DAT uses it's own script language.
    Edit/View Extension extension - ⊞ - Select the file extension this DAT should expose to external editors.
    • dat dat - various common file extensions.
    • From Language language - pick extension from DATs script language.
    • Custom Extension custom - Specify a custom extension.
    Custom Extension customext - Specifiy the custom extension.

    Word Wrap wordwrap - ⊞ - Enable Word Wrap for Node Display.
    • Input input - The DAT uses the inputs setting.
    • On on - Turn on Word Wrap.
    • Off off - Turn off Word Wrap.


    Operator Inputs

    • Input 0: -


    Info CHOP Channels

    Extra Information for the CHOP Execute DAT can be accessed via an Info CHOP.

    Common DAT Info Channels

    • num_rows - Number of rows in this DAT.
    • num_cols - Number of columns in this DAT.

    Common Operator Info Channels

    • total_cooks - Number of times the operator has cooked since the process started.
    • cook_time - Duration of the last cook in milliseconds.
    • cook_frame - Frame number when this operator was last cooked relative to the component timeline.
    • cook_abs_frame - Frame number when this operator was last cooked relative to the absolute time.
    • cook_start_time - Time in milliseconds at which the operator started cooking in the frame it was cooked.
    • cook_end_time - Time in milliseconds at which the operator finished cooking in the frame it was cooked.
    • cooked_this_frame - 1 if operator was cooked this frame.
    • warnings - Number of warnings in this operator if any.
    • errors - Number of errors in this operator if any.


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