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[dharmon <>]

Hello,

I want to run a simulation, on the 1D Sort Kinetic Data Structure (KDS), for
example, by reading data from a file where each line is  id,t,v  triplets,
where id is a point index, t is a time, and v is a new velocity.
(I am assuming piecewise linear trajectories and constant number of points.)

so I can do something like

// read a line (id,t,v) from file
do
{
  sh.set_current_time(t); // tell simulation handle to update time
  *tr.active_points_1_table_handle().set(key(id), v) // Should send a "set"
notification to the KDS

  // read new line
} while (!in.eof());

Then what I want to do is essentially hijack the set method in the KDS. In
this method I want to look at the points, in particular their position and
velocity at the current simulation time, and do some stuff with it.

How do I do this last part? It seems simple but I can't figure it out.

The active objects table stores Point_1 as its data type (for this specific
KDS). If I call aot.at(k) I get a Point_1 back. How do I turn this into a
double that represents the approximation of the position (and velocity) of
point k at the current time?

I assume if I figure this out for Point_1 it will be straight-forward to do
it for Point_2 and Point_3, as used by the other included KDS.

Thanks for your help.

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