Difference between revisions of "Robocode/Game Physics"

Revision as of 19:32, 17 August 2009

This page describes the game physics of Robocode.

Coordinates System:	Robocode is using the Cartesian Coordinate System, which means that that the (0, 0) coordinate is located in the bottom left of the battle field.
Clockwise Direction:	Robocode is using a clockwise direction convention where 0 / 360 deg is towards "North", 90 deg towards "East", 180 deg towards "South", and 270 deg towards "West".

Time (t):	Robocode time is measured in "ticks". Each robot gets one turn per tick. 1 tick = 1 turn.
Distance Measurement:	Robocode's units are basically measured in pixels, with two exceptions. First, all distances are measured with double precision, so you can actually move a fraction of a pixel. Second, Robocode automatically scales down battles to fit on the screen. In this case, the unit of distance is actually smaller than a pixel.

Acceleration (a):	Robots accelerate at the rate of 1 pixel/turn/turn. Robots decelerate at the rate of 2 pixels/turn/turn. Robocode determines acceleration for you, based on the distance you are trying to move.
Velocity Equation(v):	v = at. Velocity can never exceed 8 pixels/turn. Note that technically, velocity is a vector, but in Robocode we simply assume the direction of the vector to be the robot's heading.
Distance Equation (d):	d = vt. That is, distance = velocity * time

Max rate of rotation of robot:	(10 - 0.75 * abs(velocity)) deg / turn. The faster you're moving, the slower you turn.
Max rate of rotation of gun:	20 deg / turn. This is added to the current rate of rotation of the robot.
Max rate of rotation of radar:	45 deg / turn. This is added to the current rate of rotation of the gun.

Damage:	4 * firepower. If firepower > 1, it does an additional damage = 2 * (power - 1).
Velocity:	20 - 3 * firepower.
GunHeat generated:	1 + firepower / 5. You cannot fire if gunHeat > 0. All guns are hot at the start of each round.
Power returned on hit:	3 * firepower.

With Another Robot:	Each robot takes 0.6 damage. If a robot is moving away from the collision, it will not be stopped.
With a Wall:	AdvancedRobots take abs(velocity) * 0.5 - 1; (Never < 0).

The order that Robocode runs is as follows:

@@ Line 1: / Line 1: @@
-This page describes the game physics of [[Robocode]]
+This page describes the game physics of [[Robocode]].
-<div style="font-size:170%;text-align:center">Robocode Game Physics</div>
-<br/>
 == Coordinates and Direction Conventions ==