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Channel groups

Channel groups are groups of selected parameters. You can select several parameters and group them together so you can easily select them again later. You can also build hierarchies of channel groups, so that selecting a parent group selects all the parameters in its subgroups.

Channel groups let you scope (show in the animation editor ) and/or keyframe different groups of parameters easily. For example, in character animation , you can set up a group for a character, with sub-groups for arms, legs, head, etc. Then while you are animating the character, you can quickly and easily select the appropriate groups of parameters to keyframe.

You create and manage channel groups in the channel list , either embedded in the channel editor or in its own pane.

To...Do this

Create a new channel group

  1. In the top pane of the channel list, select the existing group, if any, you want to be the parent of the new group.

  2. In the bottom pane of the channel list, select the parameters you want in the group.

  3. Press on the selected channels and choose Create Subgroup.

Create channel groups for all parameters on a character

  • Press on the character’s object node and choose Create Nested Channel Groups.

    If you have organized the parameters of the character asset into tabs, Houdini will create nested channel groups corresponding to the organization of the parameters.

Select and scope a channel group

  • Click the name of the group in the top pane of the channel list.

Rename a channel group

  1. Double-click the name of the group in the top pane of the channel list.

  2. Type the new name and press Enter.

Add parameters to an existing group

  1. In the bottom pane of the channel list, select the parameters you want in the group.

  2. Drag the parameters up to the top pane and drop them on the name of the group.

  3. Click Add channels to group.

Remove parameters from a group

  1. In the bottom pane of the channel list, select the parameters you want to remove.

  2. Drag the parameters up to the top pane and drop them on the name of the group you want to remove them from.

  3. Click Remove channels from group.

Modify channel groups

Use the following commands:

chgadd newgroup
chgop newgroup set `strreplace(chgroup("oldgroup"), "old_name", "new_name")`

Note

Channel groups are global for the entire scene file. Copying a node will not modify channel groups.

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