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Tankode Protocol

Tankodes (Tank AI's) communicate with the game server by reading-from-and-writing-to text streams following the Tankode protocol.

All coordinates and color components are represented by rationals of the form n/d. "Over" is indicated by a blank line.

identification: tankode -> server

<tank_name> <body_colour> <track_colour> <turret_colour> <bullet_colour> <radar_colour> <scan_colour>

tank_name should be between 1 and 31 ASCII characters. Colors should be on "Hex" form: #rrggbb, each component ranging from 00 to ff.

Example (identification)

"sittingduck" Tankode with yellow body, orange tracks, orange turret, orange bullets; white radar and grey scan:

sittingduck #ffff00 #dd7700 #ff8800 #ff8800 #ffffff #888888

game tick

At each game tick, the server starts by sending a line of information to all tankodes. All tankodes should reply with a line describing its actions.

server -> tankode

<life> <speed> <enemy> <wall>

life and speed are in the range 0/1 to 1/1. enemy and wall are either - (no enemy or wall in sight) or a ratio n/d representing the distance in units from this tank to the obstacle. A tank is 1 unit wide (diameter). enemy and wall will rarely appear at the same time: only when the radar is looking at the exact point where a tank is touching a wall.

tankode -> server:

<accel> <body-turn> <turret-turn> <radar-turn> <shoot-charge>

Example (tick)

server -> tankode:

3/4 2/3 3 -

tankode -> server:

-1/2 -1/1 1/1 1/2 0

Example (full session)

Lines alternate between tankode and server, beginning with a tankode.

sittingduck #ffff00 #dd7700 #ff8800 #ff8800 #ffffff #888888
1/1 0/1 - -
1 -1/1 1/1 1/2 0
3/4 2/3 3 -
1/1 0 0 0 1/2

Game rules

Tankodes start:

  • at an arbitrary position;
  • with no charge;
  • with base, turret and radar aligned.

Then:

  • charge increases by 1/60 each Tick;
  • base turns at the maximum speed of 1/xxx turns per tick (1/xxx Hz);
  • turret turns at the maximum speed of 1/xxx turns per tick (1/xxx Hz);
  • radar turns at the maximum speed of 1/xxx turns per tick (1/xxx Hz).

The turret is mounted on the base, if the base turns, the turret turns as well. The radar is mounted on the turret, if the turret turns, the radar turns as well.

Tankodes have to keep track of their own charge, base, turret and radar alignment. This is easier than it sounds.