Tag by plan

The plane that is it pursues the plane it can catch soonest

The ground control agent estimates the time to catch each plane: the distance, divided by the speed that the chaser has more than the target. If the target is behind the chaser, it adds 3 s. Thus a slow plane ahead is a better target than a near plane behind. The chaser keeps its target until another target is clearly quicker to catch.

If the chaser Kestrel is behind Merlin and ahead of Swift, wait for the next decision of the ground control agent. Kestrel gets a pursue plan with Merlin, id 2, as its target.

Given the chaser Kestrel is behind Merlin and ahead of Swift
When the ground control agent decides
Then the plane that Kestrel pursues is Merlin

A plane that is not it holds its own height band

If the chaser Kestrel is far from the others, wait for the next decision of the ground control agent. Merlin gets a band plan. The plan of Merlin gives the band from 35 m to 45 m above home. Swift gets a band plan. The plan of Swift gives the band from 50 m to 58 m above home.

Given the chaser Kestrel is far from the others
When the ground control agent decides
Then the plan of Merlin is band
  And the band of Merlin is 35 to 45 m
  And the plan of Swift is band
  And the band of Swift is 50 to 58 m

A plane that is not it breaks away from a chaser that comes near

How far a plane sees the chaser depends on its pilot: Kestrel sees it at 80 m, Merlin at 60 m and Swift at 40 m. The evade plan gives the band of the plane, but the executor flies 20 m above or below the chaser. Thus an evade can take a plane out of its band.

If the chaser Kestrel is near Merlin, wait for the next decision of the ground control agent. Merlin gets an evade plan. The plan of Merlin gives the band from 35 m to 45 m above home. Swift gets a band plan.

Given the chaser Kestrel is near Merlin
When the ground control agent decides
Then the plan of Merlin is evade
  And the band of Merlin is 35 to 45 m
  And the plan of Swift is band

A plane that is not it never pursues

Scroll up to the report just above console ready. The report of the runner says RESULT pursue_not_it=0. Only the plane that is it got pursue plans.

See it in Watching a game of tag by plan.

When the planes play a game of tag
Then the pursue plans for the planes not it are 0

Every plane plays in AGENT mode and accepts every command

Scroll up to the report just above console ready. The report of the runner says RESULT in_agent=3. All three planes played in AGENT mode. The report of the runner says RESULT refused=0. The planes accepted every plan, every game command and every mode change.

See it in Watching a game of tag by plan.

When the planes play a game of tag
Then the planes in AGENT mode are 3
  And the refused commands are 0

Each new plane that is it is reported

The game changes who is it when the chaser tags a plane, or when a plane leaves the arena. The runner reports each change, and it says which of the two it was.

Scroll up to the report just above console ready. For each new plane that is it, the runner printed a line. The line says who tagged whom, or who left the arena.

See it in Watching a game of tag by plan.

When the planes play a game of tag
Then the reports of the hand-overs are complete