Tracer

compute particle traces and streamlines

Parameters

name	description	type
taskType	task type (Streamlines, MovingPoints, Pathlines, Streaklines)	Int
tdirection	direction in which to trace (Both, Forward, Backward)	Int
dt_step	duration of a timestep (for moving points or when data does not specify realtime)	Float
add_data_kind0	field to compute (None, ParticleId, Step, Time, StepWidth, Distance, TerminationReason, CellIndex, BlockIndex)	Int
add_data_kind1	field to compute (None, ParticleId, Step, Time, StepWidth, Distance, TerminationReason, CellIndex, BlockIndex)	Int
verbose	verbose output	Int
no_startp	number of startpoints	Int
startStyle	initial particle position configuration (Line, Plane)	Int
startpoint1	1st initial point	Vector
startpoint2	2nd initial point	Vector
direction	direction for plane	Vector
max_no_startp	maximum number of startpoints (for parameter/slider limits)	Int
trace_time	maximum trace time	Float
trace_len	maximum trace distance	Float
steps_max	maximum number of integrations per particle	Int
min_speed	minimum particle speed	Float
integration	integration method (Euler, RK32, ConstantVelocity)	Int
h_init	fixed step size for euler integration	Float
h_min	minimum step size for rk32 integration	Float
h_max	maximum step size for rk32 integration	Float
err_tol_abs	absolute error tolerance for rk32 integration	Float
err_tol_rel	relative error tolerance for rk32 integration	Float
cell_relative	whether step length control should take into account cell size	Int
velocity_relative	whether step length control should take into account velocity	Int
use_celltree	use celltree for accelerated cell location	Int
num_active	number of particles to trace simultaneously on each node (0: no. of cores)	Int
particle_placement	where a particle’s data shall be collected (InitialRank, RankById, RankByTimestep, Rank0)	Int
cell_index_modulus	modulus for cell number output	Int
simplification_error	tolerable relative error for result simplification	Float