Pulse CHOP

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Summary

The Pulse CHOP generates pulses in one channel at regular intervals. The amplitude of each pulse can be edited with the CHOP sliders or with handles on the graph.

The Pulse CHOP gives a set of pulses in a static channel of a specifiable length.

See also the LFO CHOP to get an endless stream of pulses that is Time Sliced, and the Pattern CHOP for a string of static pulses.

The Pulse CHOP can be used as triggers to the Copy CHOP, and can represent regularly-timed events.

By default, the pulses are a single sample long, but you can increase the Pulse Width so that the pulses are steps to the next pulse. You can also interpolate the values between pulses, as Linear, Ease In Ease Out, Cubic or other curves.

The pulses can be restricted to a minimum / maximum limit. If the Limit Type is Clamp, the graph has additional convenient handles at the minimum and maximum for each pulse.

The Pulse CHOP generates a single channel of up to 32 pulses, and you can merge several Pulse CHOPs into a multi-channel CHOP.

The Pulse CHOP uses its optional second input as a start/end reference, so a number of Pulse CHOPs can be stretched to the same interval.

In order to set the value at the last sample, the option, Last Pulse at Last Sample is provided. Otherwise, the last pulse is prior to the last sample.

PythonIcon.pngpulseCHOP_Class


Parameters - Pulse Page

Number of Pulses number - The number of pulses to generate.

Interpolate interp - - You can interpolate the values between pulses using the following function curves:

  • Off nointerp - Disables interpolation.
  • Linear linear - Use linear interpolation between samples when the interval is lengthened. Averages all samples near the new sample when the interval is shortened.
  • Ease in easein - Uses an easein() function for blending.
  • Ease out easeout - Uses an easeout() function for blending.
  • Ease in Ease out cosine - Uses both easein() and easeout() functions.
  • Cubic cubic - Cubically interpolates between samples, for smoother curves than Linear. This method is not recommended for channels with sharp changes.

Pulse Width width - By default, the pulses are a single sample long, but you can increase the Pulse Width so that the pulses are steps to the next pulse.  

Pulse Width Unit widthunit - -

Limit Type limit - -

  • Off nolimit - Pulses are allowed to be any value with no clamping.
  • Clamp clamp - Clamps pulse values to the Minimum and Maximum values specified below.

Minimum min - The pulses can be restricted to a Minimum limit. If the Limit Type is Clamp, the graph has additional convenient handles at the minimum for each pulse.  

Maximum max - The pulses can be restricted to a Maximum limit. If the Limit Type is Clamp, the graph has additional convenient handles at the maximum for each pulse.  

Last Pulse at Last Sample lastpulse - In order to set the value at the last sample, the option Last Pulse at Last Sample is provided. Otherwise, the last pulse is prior to the last sample.



Parameters - 0 Page

etc. The value of the sequence pulse.

Pulse 0 pulse0 -  

Pulse 1 pulse1 -  

Pulse 2 pulse2 -  

Pulse 3 pulse3 -  

Pulse 4 pulse4 -  

Pulse 5 pulse5 -  

Pulse 6 pulse6 -  

Pulse 7 pulse7 -  



Parameters - 8 Page

Pulse 8 pulse8 -  

Pulse 9 pulse9 -  

Pulse 10 pulse10 -  

Pulse 11 pulse11 -  

Pulse 12 pulse12 -  

Pulse 13 pulse13 -  

Pulse 14 pulse14 -  

Pulse 15 pulse15 -  



Parameters - 16 Page

Pulse 16 pulse16 -  

Pulse 17 pulse17 -  

Pulse 18 pulse18 -  

Pulse 19 pulse19 -  

Pulse 20 pulse20 -  

Pulse 21 pulse21 -  

Pulse 22 pulse22 -  

Pulse 23 pulse23 -  



Parameters - 24 Page

Pulse 24 pulse24 -  

Pulse 25 pulse25 -  

Pulse 26 pulse26 -  

Pulse 27 pulse27 -  

Pulse 28 pulse28 -  

Pulse 29 pulse29 -  

Pulse 30 pulse30 -  

Pulse 31 pulse31 -  



Parameters - Channel Page

Channel Names channelname -

Start start - The start times of the desired interval.  

Start Unit startunit - -

End end - The end times of the desired interval.  

End Unit endunit - -

Sample Rate rate -  

Extend Left left - - The left extend conditions.

  • Hold hold -
  • Slope slope -
  • Cycle cycle -
  • Mirror mirror -
  • Default Value default -

Extend Right right - - The right extend conditions.

  • Hold hold -
  • Slope slope -
  • Cycle cycle -
  • Mirror mirror -
  • Default Value default -

Default Value defval - The default value for extend conditions.  



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).



CHOPs
Ableton Link • Analyze • Angle • Attribute • Audio Band EQ • Audio Device In • Audio Device Out • Audio Dynamics • Audio File In • Audio Filter • Audio Movie • Audio Oscillator • Audio Para EQ • Audio Play • Audio Render • Audio Spectrum • Audio Stream In • Audio Stream Out • Beat • BlackTrax • Blend • Clip Blender • Clip • Clock • Composite • Constant • Copy • Count • CPlusPlus • Cross • Cycle • DAT to • Delay • Delete • DMX In • DMX Out • Envelope • EtherDream • Event • Expression • Extend • Fan • Feedback • File In • File Out • Filter • Function • Gesture • Handle • Helios DAC • Hog • Hokuyo • Hold • In • Info • Interpolate • Introduction To CHOPs id• Inverse Curve • Inverse Kin • Join • Joystick • Keyboard In • Keyframe • Kinect • Lag • Leap Motion • Leuze ROD4 • LFO • Limit • Logic • Lookup • LTC In • LTC Out • Math • Merge • MIDI In • MIDI In Map • MIDI Out • Mouse In • Mouse Out • NatNet In • Noise • Null • Object • Oculus Audio • Oculus Rift • OpenVR • OSC In • OSC Out • Out • Override • Panel • Parameter • Pattern • Perform • Pipe In • Pipe Out • PosiStageNet • Pulse • RealSense • Record • Rename • Render Pick • Reorder • Replace • Resample • S Curve • Scan • Script • Select • Sequencer • Serial • Shared Mem In • Shared Mem Out • Shift • Shuffle • Slope • SOP to • Sort • Speed • Splice • Spring • Stretch • Switch • Sync In • Sync Out • Tablet • Time Slice • Timeline • Timer • TOP to • Touch In • Touch Out • Trail • Transform • Trigger • Trim • Warp • Wave

To pulse a parameter is to send it a signal from a CHOP or python or a mouse click that causes a new action to occur immediately. A pulse from a CHOP is typically a 0 to 1 to 0 signal in a channel, and a pulse via python is via a .pulse() call on a pulse-type parameter, such as Reset in a Speed CHOP.

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.

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.

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.

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.

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 Root. To refer instead to a filesystem folder, directory, disk file or http: address, see Folder.

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.