Analyze CHOP
Summary[edit]
The Analyze CHOP looks at the values of all the values of a channel, and outputs a single-number result into the output. The output is one sample long. It can analyze for maximum, average, peaks and other aspects of a channel.
Parameters - Analyze Page
Function function - ⊞ - This menu determines the function applied to the channel.
- Average
average- The average of the channel.
- Maximum
maximum- The maximum value of the channel.
- Minimum
minimum- The minimum value of the channel.
- Index of Maximum
maximumindex-
- Index of Minimum
minimumindex-
- Sum
sum- The sum of all the samples in the channel.
- RMS Power
rmspower- The RMS (root-mean-square) of the channel.
- Value of First Peak
firstpeakvalue- The value of the first peak in the channel.
- Index of First Peak
firstpeakindex- The index of the first peak in the channel. The index of the first sample is 0.
- Value of Last Peak
lastpeakvalue-
- Index of Last Peak
lastpeakindex-
- Value of Highest Peak
highestpeakvalue- The value of the highest peak in the channel.
- Index of Highest Peak
highestpeakindex- The index of the highest peak in the channel. If multiple samples have the same highest peak value, it returns the index of the last peak sample.
- Value of Lowest Peak
lowestpeakvalue- The value of the lowest peak in the channel.
- Index of Lowest Peak
lowestpeakindex- The index of the lowest peak in the channel. If multiple samples have the same lowest peak value, it returns the index of the last peak sample.
- Total Peaks
totalpeaks- The total number of peaks in the channel.
Allow Start Peaks allowstart - If the values of the first 2 samples are v0 and v1, if v0 > v1, count it as a peak. The default is to never count the first sample as a peak.
Allow End Peaks allowend - If the values of the last 2 samples are vn and vm, if vm > vn, count it as a peak. The default is to never count the last sample as a peak.
No Peak Value nopeakvalue - When no peaks are found, make this number (default is -1) the result that is output. When the Function is set to Peak Index or Peak Value, it is a way to detect that no peaks were found.
Analyze Valleys vs Peaks valleys - Analyze instead for the First Valley, Highest Valley, and Lowest Valley, when the corresponding Function menu options are chosen.
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 hasgeo1/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).
Operator Inputs
- Input 0 -
TouchDesigner Build:
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An Operator Family which operate on Channels (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 CHOP Viewer is on. The current value of a channel can be exported to a parameter of any operator, overriding that parameter's value. See Parameter.
An Operator Family that manipulates text strings: multi-line text or tables. Multi-line text is often a command Script, but can be any multi-line text. Tables are rows and columns of cells, each containing a text string.
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 Network Editor by pressing the keyboard shortcut 'p'.
TouchDesigner is a hierarchy of components. "root" is the top-most network in the hierarchy. The Path is simply /. A typical path is /project1/moviein1.
