Difference between revisions of "Robot gallery"

Revision as of 05:55, 6 October 2009

For reference information on how these robots work, see the Programming Robots section.

IMPORTANT: In order for these bots to work with Bitfighter 011 alpha 2, you will need to update the file "robot_helper_functions.lua" in your Bitfighter install folder. Replace the file's contents with the following:

bot = LuaRobot(Robot) -- This is a reference to our bot.
 
 
function getFiringSolution(item)
    if(item == nil) then
        return nil
    end
 
    type = item:getClassID()
    if(type == nil) then
        return nil
    end
 
    return bot:getFiringSolution(type, item)
end
 
 
function logprint(msg)
    bot:logprint(msg)
end

JUST AS IMPORTANT In 011 alpha 2, there is a bug in setThrustToPt() that can cause Bitfighter to hang. It will be fixed in alpha 3. Inserting the line:

   if(bot:getTime() == 0) then return end

as the first line of your getMove() function will fix the problem.

-- -- OrbitBot, a simple robot that finds the nearest TestItem and orbits it -- Note that this relies on line-of-sight navigation, so only good for open levels -- -- !!! WILL ONLY WORK WITH RELEASE VERSION OF BITFIGHTER 011 AND ABOVE !!! --

-- This is called by the robot's idle routine each tick. -- This function must be present for the robot to work!

function getMove()

   if(targetItem == nil) then
       targetItem = findClosest(bot:findGlobalItems(TestItemType))
   end

   if(targetItem == nil) then return end

   local botLoc = bot:getLoc()
   local itemLoc = targetItem:getLoc()

   local dist = botLoc:distanceTo( itemLoc )

   -- Here we use the getTime() function to make the motion look smooth.
   -- If we just advanced orbitAng by a fixed amount each frame, it would
   -- appear jerky, as each frame is a slightly different length.

   -- .0015 determined experimentally
   orbitAng = orbitAng + .0015 * bot:getTime()

   local dest

   if( dist <= orbitRadius * 1.1 ) then    -- Close enough to enter orbit
       dest = itemLoc
       dest:setxy( itemLoc:x() + orbitRadius * math.cos (orbitAng),
                   itemLoc:y() + orbitRadius * math.sin (orbitAng)  )
       if( not isInOrbit ) then
           orbitAng = botLoc:angleTo( dest ) - math.pi / 2
       end    
       
       isInOrbit = true
                   
   else                                    -- Travel directly toward object
       dest = itemLoc
       orbitAng = botLoc:angleTo( dest )
       isInOrbit = false
   end

   bot:setThrustToPt( dest )                 -- Travel towards calculated point
   bot:setAngle( botLoc:angleTo( itemLoc) )  -- Aim ship that way too

end

-- This function is called once and should return the robot's name

function getName()

   return( "OrbitBot")

end

-- Setup code here: this is run once when the robot is initialized, and -- any variables set here will persist throughout the robot's life. These -- variables can be accessed from various functions defined in this file.

-- Global variables must be declared here before they can be used elsewhere orbitAng = 0 orbitRadius = 300 isInOrbit = false targetItem = nil