ZED CHOP

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Summary
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The ZED CHOP reads positional and plane tracking from the ZED camera.

NOTE: This CHOP works with the Stereolabs ZED hardware.

See also ZED TOP and ZED SOP.

PythonIcon.pngzedCHOP_Class


Parameters - ZED Page

Active active -

Camera camera - Selects which ZED camera to use.

Camera Position cameraposition - Returns the camera position relative to the intial position of the camera. A tx, ty, tz triplet of channels will be output for the position of the camera in meters. An rx, ry, rz triplet will be output for the orientation.

Reset resetcameraposition -

Camera Position planeatpoint - Enables plane at point, which returns the position of the plane corresponding the UV coordinate.

Reference Frame referenceframe - - Selects the reference frame for plane position.

  • World world - Plane position outputs are relative to the initial position of the camera.
  • Camera camera - Plane position is relative to the initial position of the camera.

U u - Sets the U coordinate of the point in the image to extract plane position.  

V v - Sets the V coordinate of the point in the image to extract plane position.  

Normal normal - Returns nx, ny, and nz normal channels of the plane.

Center center - Returns tx, ty, and tz position channels of the center of the plane.

Extents extents - Returns width and height of the bounding rectangle of the plane.


Parameters - Common Page

Time Slice timeslice - Turning this on forces the channels to be "Time Sliced". A Time Slice is the time between the last cook frame and the current cook frame.

Scope scope - To determine which channels get affected, some CHOPs use a Scope string on the Common page.

Sample Rate Match srselect - - Handle cases where multiple input CHOPs' sample rates are different. When Resampling occurs, the curves are interpolated according to the Interpolation Method Option, or "Linear" if the Interpolate Options are not available.

  • Resample At First Input's Rate first - Use rate of first input to resample others.
  • Resample At Maximum Rate max - Resample to the highest sample rate.
  • Resample At Minimum Rate min - Resample to the lowest sample rate.
  • Error If Rates Differ err - Doesn't accept conflicting sample rates.

Export Method exportmethod - - This will determine how to connect the CHOP channel to the parameter. Refer to the Export article for more information.

  • DAT Table by Index datindex - Uses the docked DAT table and references the channel via the index of the channel in the CHOP.
  • DAT Table by Name datname - Uses the docked DAT table and references the channel via the name of the channel in the CHOP.
  • Channel Name is Path:Parameter autoname - The channel is the full destination of where to export to, such has geo1/transform1:tx.

Export Root autoexportroot - This path points to the root node where all of the paths that exporting by Channel Name is Path:Parameter are relative to.

Export Table exporttable - The DAT used to hold the export information when using the DAT Table Export Methods (See above).


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An which operate on (a series of numbers) which are used for animation, audio, mathematics, simulation, logic, UI construction, and many other applications.

A .

The term "Frame" is used (1) in the , (2) as a time-unit in CHOPs, (3) as a time-unit in TOPs, and (4) with movies images which are read and created with TOPs.

A Time Slice is the time from the last cook frame to the current cook frame. In CHOPs it is the set of short channels that only contain the CHOP channels' samples between the last and the current cook frame.

A parameter in most CHOPs that restricts which channels of that CHOP will be affected. Normally all channels of a CHOP are affected by the operator.

samples-per-second of a CHOP. Each CHOP in your network has a sample rate, whether it is used or not. The overall timeline has a "frame rate", which is the number of animation frames per second, generally your monitor display frequency.

Exporting is the connection of CHOP channels to parameters of operators. The output of each exporting CHOP is one or more channels, active only while the is on. The current value of a channel can be exported to a parameter of any operator, overriding that parameter's value. See .

An that manipulates text strings: multi-line text or tables. Multi-line text is often a command , but can be any multi-line text. are rows and columns of cells, each containing a text string.

The location of an operator within the TouchDesigner environment, for example, /geo1/torus1, a node called torus1 in a component called geo1. The path / is called . To refer instead to a filesystem folder, directory, disk file or http: address, see .

Parameters in TouchDesigner are an operator's settings (numbers, menus, flags, strings, paths) which the user can alter. Parameters for any operator can be opened by right-clicking on the operator and selecting "Parameters..." A currently selected operator's parameters can be viewed in a by pressing the keyboard shortcut 'p'.

TouchDesigner is a hierarchy of components. "root" is the top-most network in the hierarchy. The is simply /. A typical path is /project1/moviein1.