Copy CHOP
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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.
Parameters - Copy Page
Copy Method
method - ⊞ - Select which copy method to use from the menu options below.
- 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 - ⊞ - Select which output method to use from the menu options below.
- 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 Remainder parameter below..
- 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.
Copy
copy - Sequence of values available as stamps.
Param
copy0param - The parameters are re-calculated for each copy. Set the parameter name here and the value below. 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
copy0value - Set the parameter's value to be copied.
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. See Pattern Matching.
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: -
Info CHOP Channels
Extra Information for the Copy CHOP can be accessed via an Info CHOP.
Common CHOP Info Channels
- start - Start of the CHOP interval in samples.
- length - Number of samples in the CHOP.
- sample_rate - The samplerate of the channels in frames per second.
- num_channels - Number of channels in the CHOP.
- time_slice - 1 if CHOP is Time Slice enabled, 0 otherwise.
- export_sernum - A count of how often the export connections have been updated.
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.
TouchDesigner Build:
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