PVANodes ▸ Functions ▸ Structural
Line Endpoints
Takes the first or last finite point of every line of a field-line bundle, optionally stepping a few points inward, as a point stack with one point per line. It also carries the point index, the line number and the line's arc length, so traces from two time steps can be compared line by line.
Inputs
| Port | Accepts | Required | Description |
|---|---|---|---|
x | dataset(stack) | required | The field lines (or a 1-D stack as one line) to take endpoints of |
Parameter ports
Added from the Parameters pane (⊕). While connected, each drives its parameter.
| Port | Accepts | Mode | Description |
|---|---|---|---|
offset | primitive(number) | opt-in drives offset | Drives the Offset parameter while connected |
Outputs
dataset(stack)
Parameters
| Parameter | Kind | Default | Choices / range | Unit | Notes |
|---|---|---|---|---|---|
Endend | choice | end | start | end | ||
Offsetoffset | int | 0 | 0 to | ⇄ port |