Difference between revisions of "Robot gallery"

From Bitfighter
(→‎OrbitBot)
(Added more instructions)
 
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For reference information on how these robots work, see the [[Programming_robots|Programming Robots]] section.
 
For reference information on how these robots work, see the [[Programming_robots|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:
 
  
 
<source lang="lua">
 
<source lang="lua">
−
 
−
bot = LuaRobot(Robot) -- This is a reference to our bot.
 
−
 
−
 
−
function getFiringSolution(item)
 
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    if(item == nil) then
 
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        return nil
 
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    end
 
−
 
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    type = item:getClassID()
 
−
    if(type == nil) then
 
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        return nil
 
−
    end
 
−
 
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    return bot:getFiringSolution(type, item)
 
−
end
 
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−
 
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function logprint(msg)
 
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    bot:logprint(msg)
 
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end
 
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</source>
 
−
 
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'''JUST AS IMPORTANT'''
 
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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:
 
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<source lang="lua">
 
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  if(bot:getTime() == 0) then return end
 
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</source>
 
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as the first line of your getMove() function will fix the problem.
 
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-------------------------------------------------------------------------------
 
-------------------------------------------------------------------------------
 
-------------------------------------------------------------------------------
 
-------------------------------------------------------------------------------
Line 90: Line 59:
 
     end
 
     end
  
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     bot:setThrustToPt( dest )                 -- Travel towards calculated point
+
     bot:setThrustToPt( dest )                 -- Travel towards calculated point
−
     bot:setAngle( botLoc:angleTo( itemLoc) )  -- Aim ship that way too
+
     bot:setAngle( botLoc:angleTo( itemLoc ) )  -- Aim ship that way too
 
end
 
end
  
Line 103: Line 72:
  
 
function getName()
 
function getName()
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     return( "OrbitBot")
+
     return( "OrbitBot" )
 
end
 
end
  
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isInOrbit = false
 
isInOrbit = false
 
targetItem = nil
 
targetItem = nil
 +
</source>
 +
 +
You can use the above bot with the following level file.  Copy the robot code into a file called "orbitbot.bot" in your robots folder, then copy the following code into a file called "orbitbotdemo.level" in your levels file.  The Robot line in the level file tells Bitfighter to load a robot called orbitbot.bot from the robots folder, and assign it to Team 1.
 +
 +
When you play the level, you should see a functional orbitbot!
 +
 +
<source lang="levelcode">
 +
GameType 10 10
 +
LevelName OrbitBot Home
 +
LevelDescription Robot demo level
 +
LevelCredits
 +
Robot 1 orbitbot.bot
 +
GridSize 255
 +
MinPlayers 0
 +
MaxPlayers 0
 +
Team Blue 0 0 1
 +
Team Red 1 0 0
 +
BarrierMaker 50 1 -2  1 6  9 6  9 -2  1 -2
 +
Spawn 0 3 2
 +
Spawn 1 7 2
 +
TestItem 5 2
 +
</source>

Latest revision as of 18:38, 12 February 2010

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


-------------------------------------------------------------------------------
-------------------------------------------------------------------------------
--
-- 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

You can use the above bot with the following level file. Copy the robot code into a file called "orbitbot.bot" in your robots folder, then copy the following code into a file called "orbitbotdemo.level" in your levels file. The Robot line in the level file tells Bitfighter to load a robot called orbitbot.bot from the robots folder, and assign it to Team 1.

When you play the level, you should see a functional orbitbot!

Invalid language.

You need to specify a language like this: <source lang="html4strict">...</source>

Supported languages for syntax highlighting:

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GameType 10 10
LevelName OrbitBot Home
LevelDescription Robot demo level
LevelCredits
Robot 1 orbitbot.bot
GridSize 255
MinPlayers 0
MaxPlayers 0
Team Blue 0 0 1
Team Red 1 0 0
BarrierMaker 50 1 -2  1 6  9 6  9 -2  1 -2 
Spawn 0 3 2 
Spawn 1 7 2 
TestItem 5 2
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