Parameters
Group Expand node allows to grow or shrink a selection. It works by looking at the neighbors of selected group items and adds them to the group or removing boundary items from the group.
This node operates on shapes or points.
Parameters
| Parameter | Description |
|---|---|
Label | The display name for the node. |
Group | The original group to expand or shrink. |
Replace Original | If enabled, the result will replace the original group definition. |
New Group Name | The name for the new expanded group definition. |
Type | Expand selection across points or whole shapes. |
Steps | Positive values expand, negative values shrink. |
Key features
Expansion types
- Points:
- For Paths: Points connected by edges are considered neighbors.
- For Point clouds/Shapes: finds the nearest unselected point to every selected point.
- Shapes: Treats entire shapes as atomic units and finds the nearest unselected shape.
Steps
The Steps parameter controls the magnitude and direction of the operation:
- Positive values: Expand the group. Each step adds one “layer” of neighbors.
- Negative values: Shrink the group. Each step removes the outer “layer” of the selection.
- Zero: No change. Result will be same as in incoming group.
Replacing groups
Just like Group Invert, you can choose to overwrite the original group definition in-place.
- Enabled: The output group has the same name as the input group, effectively updating/overriding it.
- Disabled: A new group name is created containing the expanded selection.