Nodes ▸ Functions ▸ Mesh Filters ▸ Vectors

Streamlines

Integrates streamlines of a vector field from launch points: by default the same deterministic lattice the Tracer uses (n points at radius r), or the points on the optional lps input, which takes a (3, N) array, a point stack, a grid, a surface or a mesh, the way the Tracer does. The output is one polyline per launch point, in launch-point order; with both directions the backward and forward halves are joined into one line.

Inputs

Port	Accepts	Required	Description
`x`	dataset	required	The mesh (or any dataset, promoted) to filter

Parameter ports

Added from the Parameters pane (⊕). While connected, each drives its parameter.

Port	Accepts	Mode	Description
`lps` Launch points	primitive(array) dataset	opt-in	Launch points for the streamlines; replaces the n/r lattice while connected
`max_steps`	primitive(number)	opt-in drives `max_steps`	Drives the Max Steps parameter while connected

Outputs

dataset(mesh)

Parameters

Parameter	Kind	Default	Choices / range	Unit	Notes
Vectors `vectors`	choice	none
Launch Points (n) `n`	int	`100`	1 to 100000
Launch Radius `r`	float	`1.05`	1 to	R_sun
Integration Direction `integration_direction`	choice	`both`	forward \| backward \| both
Max Steps `max_steps`	int	`2000`	1 to		⇄ port
Space `space`	choice	`cartesian`	spherical \| cartesian

Used by

Reconnection Between Steps Vector Field (B)

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