Turns key presses into channel output.
This CHOP listens for keyboard input (on up to nine keys), and outputs channel data. It creates a single-frame channel for the current state of each key.
Enter a channel name in a Name field, and choose a key using the corresponding Key menu.
Each key event gets routed to one destination in this order:
Input field (only if selected).
CHOPs (only if used).
The Keyboard CHOP can only be used while in “Intercept” mode. To enable Intercept mode, you need to have Scroll Lock on. To use the keypad number keys you must have Num Lock on.
When in Intercept mode, the Houdini Playbar will change to an orange color and all keyboard input will be redirected to any Keyboard chops. This means you cannot access any regular keyboard short-cuts (such as View state keyboard short-cuts, edit OP parameters, or use the Textport) while Intercept is on.
The name of the channel that monitors the selected key. If blank, a channel will not be created.
How a key press affects the network.
The Key selector, where valid keys are the numbers 0-9, letters A-Z, and keypad 0-9.
Some of these parameters may not be avaiable on all CHOP nodes.
To determine which channels get affected, some CHOPs have a scope string. Patterns can be used in the scope, for example
The following are examples of possible channel name matching options:
|Sample Rate Match|
The Sample Rate Match Options handle cases where multiple input CHOPs’ sample rates are different.
The units for which time parameters are specified.
For example, you can specify the amount of time a lag should last for in seconds (default), frames (at the Houdini FPS), or samples (in the CHOP’s sample rate).
When you change the Units parameter, it does not convert the existing parameters to the new units.
Time Slicing is a feature which boosts cooking performance and reduces memory usage. Traditionally, CHOPs calculate the channel over its entire frame range. If the channel does need to be evaluated every frame, then cooking the entire range of the channel is unnecessary. It is more efficient to calculate only the fraction of the channel that is needed. This fraction is known as a Time Slice.
Causes the memory consumed by a CHOP to be released after it is cooked and the data passed to the next CHOP.
The Export prefix is prepended to CHOP channel names to determine where to export to.
For example, if the CHOP channel was named
You can leave the Export Prefix blank, but then your CHOP track names need to be absolute paths, such as
Every CHOP has this option. Each CHOP gets a default color assigned for display in the Graph port, but you can override the color in the Common page under Graph Color. There are 36 RGB color combinations in the Palette.
|Graph Color Step|
When the graph displays the animation curves and a CHOP has two or more channels, this defines the difference in color from one channel to the next, giving a rainbow spectrum of colors.