This modules computes a streamline in a vector field defined on the base
lattice of a pyramid. It requires a pick input to seed the streamline.
Streamlines can be advected forwards and/or backwards in time. Any type
of pyramid is allowed. Simple linear interpolation together with a second-order
adaptive Runge-Kutta method is used for numerical integration.
Port: Pyramid In
Constraints: 1..3-D compression
Constraints: n-compression type
The pyramid whose base lattice contains the vector data.
Port: Start Point
The start point of the streamline.
Optional: This port is optional.
The integration timestep can be set by wiring a parameter into this port.
Otherwise, the timestep is computed internally, which may or may not be
Type: Option Menu
Menu Item: Forwards
Menu Item: Backwards
Menu Item: Both
The direction (in time) to advect the particle.
Remove all existing streamlines from the display.
The streamline will terminate when it reaches a stagnation point, or exceeds a
certain number of points. No checking for closed streamlines is done.
The interpolation scheme is valid within a radius of the grid points. This means
that streamlines may go beyond the bounds of the domain.
© The Numerical Algorithms Group Ltd, Oxford UK. 2000