Parameters are the options of a node. Changing the parameters changes the look or behavior of the node. For example, a Sphere SOP has position and radius parameters.
Shows the icon of the node you are currently editing. Click to show the node’s context menu. (This is the same menu you get if you press on the node’s tile in the network editor
The node’s name. When you create a node it has a default name of the operator type name plus a number. You can edit the textbox to change the node’s name (this is the same as clicking the name next to the node’s tile in the network editor). Node names can only contain letters and numbers. Spaces are not allowed in the name.
Use the items in this menu to Load and save parameter presets.
|Help (question mark)|
Click to view documentation of the node’s parameters.
Text box color coding
The parameter is controlled by an expression, and the current frame is a keyframe.
The parameter is controlled by an expression but the current frame is not a keyframe (or the channel value at the current frame is disabled from the dopesheet).
Pending keyframe (the current value at this frame is different from the keyed value, but you have not yet keyframed it).
The parameter is currently controlled by a channel operator (CHOP).
For edit fields which accept angular measurements, type the number of degrees in the edit field or press and drag on the angle icon to set the angle graphically.
For edit fields which accept angular measurements, type the number of degrees in the edit field or drag the small point at the intersection of the two rings in the polar jack.
Some operators, such as the Merge SOP and Switch SOP, allow multiple inputs to their single input connector. In these operators, an input list appears in the parameters, where you can reorder or disconnect any of the inputs.
Parameter pop-up menu
Switch the text box between showing the computed value for the current frame and the expression itself.
See HUD sliders.
|Step to Prev/Next Key, Set/Remove Keyframe|
|Copy Parameter, Paste Copied ..|
|Scope Append Channels, Scope Channels|
Show the parameter(s) in the channel editor.
Removes any animation on the parameter, making it a static, constant value.
Parameter RMB menu
|Revert to Previous Value|
Return to the previous parameter value.
|Channels and Keyframes|
Options for scoping parameters as well as setting and removing keyframes.
Additional menu with options for working with expressions.
Options for motion effects such as: Cycle, Cycle with Offset, Despike, Lag, Limit, Noise, Shift, Smooth, Spring, Stretch, and Wave.
Copies the parameter to the clipboard.
|Paste Copied Values|
Pastes in the values of the parameter on the clipboard. If you copied parameters with expressions, this will paste the computed values of the expressions.
|Paste Copied Expressions|
Pastes the values and expressions of the parameter on the clipboard. Does not convert expressions to values.
|Paste Copied References|
Pastes a reference to the copied parameter (using the ch expression function). Unlike pasting a copy of the value of the other parameter, this expression will fetch the other parameter’s value every time it is evaluated, so it stays up to date with the current value of the other parameter.
This command inserts an expression with an absolute path to the copied parameter. To insert a relative reference instead, use Paste Copied Relative References.
|Paste Copied Relative References|
Same as Paste Copied References, but the ch expression uses a relative path to the copied parameter, instead of an absolute path.
|Paste Copied Channels|
Pastes a copy of the channel. Once the channel is pasted, it is independent from the original channel and can be modified without altering the original.
|Include in Take|
Adds the parameter to the take. For more information on takes, see Create variations with takes.
Locking a parameter protect it from being edited.
|Revert to Defaults|
Resets the value to the current default. If you have changed the default value with Make Current Value Default, it will be reset to this value, not the default value that ships with Houdini.
|Revert to and Restore Factory Defaults|
Resets defaults to the ones that ship with Houdini.
|Make Current Value Default|
Makes the current value the default so that every time you create a new node it will have the new default value.
|Export Parameter to Type Properties|
Adds parameter to the Existing Parameter list in the Operator Type Properties dialog.