Keyboard In CHOP
The Keyboard In CHOP receives ASCII input from the keyboard, and outputs channels for the number of keys specified. It creates a single-frame channel representing the current state of each key.
The channels for keys are created by specifying the first key, the number of keys to follow, and the order with which they are selected. Key channel names are either determined by the name of the key, or the channel number.
NOTE: The Keyboard In CHOP does not handle rapid repeats of characters and does not output channels or all keys. A better way is as follows: Create a Panel Execute DAT, and set the 'From Component' to the panel in which keyboard keys need to be monitored.
Set the Panel Value to:
In this DAT, if you enter
echo $args, you will see a line printed for every keystroke.
See also the TScript: keystate() and mouse() expressions.
Parameters - Keys Page
active - ⊞ - While On, the keyboard inputs will be monitored and the CHOP will cook every frame. When set to Off it will not cook and the current keyboard values will not be output. While Playing will capture keyboard events only when the Timeline is playing forward.
- While Playing
firstkey - ⊞ - Specifies the key to start generating channels from. Valid keys are the numbers 0-9, letters A-Z, and keypad 0-9.
- Comma ,
- Period .
- Keypad 0
- Keypad 1
- Keypad 2
- Keypad 3
- Keypad 4
- Keypad 5
- Keypad 6
- Keypad 7
- Keypad 8
- Keypad 9
- Keypad Period
modifiers - ⊞ - If it is set to Ctrl, the keys will only go On if you are also pressing the Ctrl key. If it set to Ignore, it doesn't matter if the Ctrl key is down or not. The Keyboard In CHOP does not use the Alt key, which has been reserved for shortcuts.
- Control and Alt
Number of Keys
number - Specifies the number of keys to generate including the first key.
order - ⊞ - If you ask for 5 keys, they are sequential on the keyboard by three methods:
qwerty- Where it follows the keyboard rows, and E is followed by R, T, Y and U.
alphabetic- Where E is followed by F, G, H and I.
1qaz- Where it follows the keyboard columns, and E is followed by F, V, 4 and R.
The keypad keys are ordered: keypad 0, keypad period, keypad 1, keypad 2, etc.
channelnames - ⊞ - Channel names are generated automatically using one of these criteria.
- by Key Name
key- Keys Q W R will be called kq kw ke, based on the key name (key pad channels are named kp0, kp1...).
- by Channel Number
number- Channels are named k1 k2 k3 k4 based on the order of the channels.
Parameters - Channel Page
left - ⊞ -
- Default Value
right - ⊞ -
- Default Value
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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The internal states of a panel component are Panel Values, and are accessed with a Panel CHOP, a
OP.panel Python expression, or a Panel Execute DAT.
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.
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'.