Oculus Rift CHOP
The Oculus Rift CHOP connects to an Oculus Rift device and outputs several useful sets of channels that can be used to integrate the Oculus Rift into projects.
You can view the detected orientation of the device and put the rotation values directly into other operators. To help decrease latency, prediction can be used to guess what the orientation will be at some point in the future.
The raw sensor data is also available, with options for both sensor acceleration and angular velocity.
The devices calibration parameters are another option. These can be used to generate the projection matrices and distortion shaders, although both of these are already available (see below and Oculus Rift TOP). This data is constant, but may differ on future devices.
The last two things the Oculus Rift CHOP can output are the left and right eye projection matrices. These can be (and will need to be) passed into a camera's "Custom Projection" parameter in order to provide a proper 3D experience with the Oculus Rift. For convenience, the channels are aligned to be passed in directly by reference.
Without an Oculus Rift device connected the CHOP uses default values and will output channels corresponding to the Oculus Rift Developer Kit device. This allows you to design something for the Oculus Rift without actually having one.
See also Oculus Rift
Parameters - Setup Page
active - When on, this CHOP will update it's data when it cooks.
output - ⊞ - Switches between three different output modes.
hmd- Can output orientation, acceleration, angular velocity and device info.
- Left Controller
leftcontroller- Output channels correspond to inputs from the Left Oculus Controller.
- Right Controller
rightcontroller- Output channels correspond to inputs from the Right Oculus Controller.
- Left Projection Matrix
leftmatrix- Output channels correspond to the projection matrix for the left eye.
- Right Projection Matrix
rightmatrix- Output channels correspond to the projection matrix for the right eye.
orientation - When on, the output channels will include sensor orientation.
acceleration - When on, the output channels will include acceleration.
velocity - When on, the output channels will include velocity.
deviceinfo - When on, the output channels will include device info.
near - Specifies the distance of the near clipping plane for the projection matrix.
Parameters - Common Page
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 - 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.
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
autoexportroot - This path points to the root node where all of the paths that exporting by Channel Name is Path:Parameter are relative to.
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 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