最近看到一个RRobot，这是一个用 Ruby 来实现的坦克对战平台。感觉挺好玩的，周三在公司也顺带和同事分享了一下。有时间的同学可以尝试尝试，用 Ruby 来写坦克的 AI。另外这个不到 1000 行的程序也比较好读，这种 Robot AI 平台以前也有 C++/Java 版本的，不过都要比这个实现得复杂一点吧。
tank-ai
每个你控制的 robot 的 api 是这些，注意雷达扫描到的目标只包含距离信息，没有 x 和 y，如果雷达扫描得越快所得到的目标位置准确率越低。自己摸索着写，找一些别人写好的策略来对战一把吧。
battlefield_height #the height of the battlefield
battlefield_width #the width of the battlefield
energy #your remaining energy (if this drops below 0 you are dead)
gun_heading #the heading of your gun, 0 pointing east, 90 pointing
#north, 180 pointing west, 270 pointing south
gun_heat #your gun heat, if this is above 0 you can't shoot
heading #your robots heading, 0 pointing east, 90 pointing north,
#180 pointing west, 270 pointing south
size #your robots radius, if x <= size you hit the left wall
radar_heading #the heading of your radar, 0 pointing east,
#90 pointing north, 180 pointing west, 270 pointing south
time #ticks since match start
speed #your speed (-8/8)
x #your x coordinate, 0...battlefield_width
y #your y coordinate, 0...battlefield_height
accelerate(param) #accelerate (max speed is 8, max accelerate is 1/-1,
#negativ speed means moving backwards)
stop #accelerates negativ if moving forward (and vice versa),
#may take 8 ticks to stop (and you have to call it every tick)
fire(power) #fires a bullet in the direction of your gun,
#power is 0.1 - 3, this power will heat your gun
turn(degrees) #turns the robot (and the gun and the radar),
#max 10 degrees per tick
turn_gun(degrees) #turns the gun (and the radar), max 30 degrees per tick
turn_radar(degrees) #turns the radar, max 60 degrees per tick
dead #true if you are dead
say(msg) #shows msg above the robot on screen
broadcast(msg) #broadcasts msg to all bots (they recieve 'broadcasts'
#events with the msg and rough direction)
最近关注 Ruby 比较多，平时工作中也会用 Ruby 来写一些脚本 (渐渐代替了 Python)。有两个原因，Ruby 的语法更符合口味 (不喜欢用 Python 的 indent 约束),
Ruby 也更 Lisp 化，Ruby 的开源气氛非常好。
