Trajectory actor, together with a transfer function.

Description

The trajectory actor draws Lagrangian particle trajectories (path lines) or streamlines into a scene, either as 3D tubes or as particle positions.

• Selected features:
  • Supports 3-D visual analysis of pre-computed particle trajectories or particle-clouds
  • A converter is available for LAGRANTO trajectories. Also, converters for some of the output of the atmospheric dispersion models HYSPLIT and NAME are available (please contact us).
  • Trajectories can be drawn as 3D tubes, coloured by pressure elevation and (new in Met.3D 1.7) any other variable that is provided as auxiliary input data or has been traced/sampled along trajectories computed in Met3D.
  • Shadows of the trajectories may be rendered to the surface.
  • The individual positions of the trajectory particles can also be drawn, either for the entire trajectories or for individual time steps.
  • Animations of particle positions are possible. Also, trajectory tubes can be drawn for the part of the trajectory between trajectory start and current time.
• Required input data:
  • For visual analysis of pre-computed trajectories or particle-ensembles a file with trajectory data is required in a format similar to NetCDF-CF (please contact us for details/examples)
  • For rendering the colours of pre-computed trajectories or particle-ensembles according to pre-computed auxiliary data variables pre-computed auxiliary data variables, these data need to be included as a variable in the NetCDF-CF file with an attribute "auxiliary_data" set to "yes" and the same dimensions as the trajectory vertex information (please contact us for details/examples).
  • For computation of trajectories (streamlines or pathlines) in Met3D, gridded 3-D NWP data with 3 wind velocity components has to be provided 
• GUI interaction:
  • If you are interested in visualizing trajectories or particle-ensembles in Met3D, please do not hesitate to contact us for support. 

How to...

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