Copy CHOP
Summary[edit]
The Copy CHOP produces multiple copies of the second input along the timeline of the first input. The first input provides the trigger signals or the convolve levels.
The Copy CHOP can be used to produce a motion every time a trigger occurs. It can be used to trigger motion, such as eyelid blinks. The copies it produces can be identical, or the copies can be re-cooked each time a copy is added to the timeline. It is useful for triggering a sound multiple times, where the sounds may overlap in time.
Each copy that is added to the output can be completely different than any other copy. By passing variables through the Variables page, the second (Copy) input can be any CHOP chain that uses the variables and recooks to create each copy.
Contents
Parameters - Copy Page
Copy Method method - ⊞ -
- Triggered Copy
trigger- The second input is copied at the first input's trigger points only. A trigger point occurs whenever the first input's channel crosses the Trigger Threshold value. Overlapping copies are added.
- Convolve
convolve- For every sample in the first input's channel, the second input is shifted to that point in time, scaled by the sample value, and added into the output channels.
Output Method output - ⊞ -
- One Channel per Template Channel
match- Each output channel is a channel from the first input combined with the corresponding channel from the second input.
- One Channel per Copy Channel
accum- Each output channel is a channel from the second input, with copies triggered by every channel of the first input.
Trigger Threshold threshold - The threshold value for triggering copies.
Remainder remainder - ⊞ - See Common Parameters > Remainder Options.
- Discard Remainder
crop-
- Make Output Longer
extend-
- Mix Remainder with Beginning
mix-
Keep Non-Scoped Channels keep - If enabled, non-scoped channels are copied to the output, otherwise they are deleted.
Parameters - Stamp Page
Stamp Inputs stamp - Recook the second input for each triggered copy.
Param 1 param1 - The parameters are re-calculated for each copy. The first field is the parameter name, the second is its value. You can use CHOP Members and Methods. The parameters you set here are available to any CHOP in the network attached to the second input through the function:
fetchStamp(key, default)
Where default is any initial value for the parameter, and is usually set to 0.
Value 1 val1 -
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 -
- Input 1 -
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.
