SCREEN_BOTTOM     = 0
SCREEN_TOP        = 1
PALETTE_JET1      = 0
PALETTE_JET2      = 1
PALETTE_LASER1    = 2
PALETTE_LASER2    = 3
PALETTE_LASER3    = 4
PALETTE_LASER4    = 5
PALETTE_LIFE      = 6
PALETTE_EXPLOSION = 7
----------------------------------------------------------------------------
local m_Buttons = {
    A = { Pressed = false, timer = 0 },
    B = { Pressed = false, timer = 0 },
    X = { Pressed = false, timer = 0 },
    Y = { Pressed = false, timer = 0 },
    L = { Pressed = false, timer = 0 },
    R = { Pressed = false, timer = 0 },
    Left = { Pressed = false, timer = 0 },
    Right = { Pressed = false, timer = 0 },
    Start = { Pressed = false, timer = 0 },
    Select = { Pressed = false, timer = 0 },
    Up = { Pressed = false, timer = 0 },
    Down = { Pressed = false, timer = 0 },
}
-------------------------------------------------------------------------------
function ButtonDown( name )
    if Pads[ name ]() then
        if not m_Buttons[ name ].Pressed then
            m_Buttons[ name ].Pressed = true
            m_Buttons[ name ].timer = 0
            return true
        else
            m_Buttons[ name ].timer = m_Buttons[ name ].timer + 1
        end
    else
        if m_Buttons[ name ].Pressed then
            m_Buttons[ name ].Pressed = false
            return false
        end
    end
    return false
end
-------------------------------------------------------------------------------
function ButtonLongPressed( name )
    if m_Buttons[ name ].Pressed and m_Buttons[ name ].timer >= 6 then
        return true
    end
    return false
end
-------------------------------------------------------------------------------
BGBotMap = Screen.LoadTileBG()
BGTopMap = Screen.LoadTileBG()
BGBotText = Screen.LoadTextBG()
BGTopText = Screen.LoadTextBG()

BGBotMap:LoadPalette( "decorbot.pal" )
BGBotMap:LoadTiles( "decorbot.raw", 256 )
BGBotMap:LoadMap( "decorbot.map", ( 256 / 8 ), ( 192 / 8 ))
Screen.Initialize ( 0, BGBotText, BGBotMap )

BGTopMap:LoadPalette( "decortop.pal" )
BGTopMap:LoadTiles( "decortop.raw", 256 )
BGTopMap:LoadMap( "decortop.map", ( 256 / 8 ), ( 192 / 8 ))
Screen.Initialize ( 1, BGTopText, BGTopMap )

BGTopText:SetColor( 5 )
BGTopText:PrintXY( 0, 0, "Jetfighter: Cid2Mizard for DSLua" )
BGTopText:SetColor( 6 )
BGTopText:PrintXY( 31, 5, "S" )
BGTopText:PrintXY( 31, 6, "C" )
BGTopText:PrintXY( 31, 7, "O" )
BGTopText:PrintXY( 31, 8, "R" )
BGTopText:PrintXY( 31, 9, "E" )
BGTopText:PrintXY( 31, 10, "-" )
BGTopText:PrintXY( 31, 11, "0" )

BGBotText:SetColor( 1 )
BGBotText:PrintXY( 10,23, "Start : Quit" )
BGBotText:SetColor( 6 )
BGBotText:PrintXY( 0, 5, "S" )
BGBotText:PrintXY( 0, 6, "C" )
BGBotText:PrintXY( 0, 7, "O" )
BGBotText:PrintXY( 0, 8, "R" )
BGBotText:PrintXY( 0, 9, "E" )
BGBotText:PrintXY( 0, 10, "-" )
BGBotText:PrintXY( 0, 11, "0" )

Sprite.LoadPalette( SCREEN_TOP, PALETTE_JET1, "jet1.pal" )
Sprite.LoadPalette( SCREEN_BOTTOM, PALETTE_JET2, "jet2.pal" )
Sprite.LoadPalette( SCREEN_TOP, PALETTE_LASER1, "laser1.pal" )
Sprite.LoadPalette( SCREEN_BOTTOM, PALETTE_LASER3, "laser1.pal" )
Sprite.LoadPalette( SCREEN_TOP, PALETTE_LASER4, "laser2.pal" )
Sprite.LoadPalette( SCREEN_BOTTOM, PALETTE_LASER2, "laser2.pal" )
Sprite.LoadPalette( SCREEN_TOP, PALETTE_LIFE, "life.pal" )
Sprite.LoadPalette( SCREEN_BOTTOM, PALETTE_LIFE, "life.pal" )
Sprite.LoadPalette( SCREEN_TOP, PALETTE_EXPLOSION, "explosion.pal" )
Sprite.LoadPalette( SCREEN_BOTTOM, PALETTE_EXPLOSION, "explosion.pal" )

Jet1Frames   = FrameStrip.Create( SCREEN_TOP, 32, 32, "256" )
Jet2Frames   = FrameStrip.Create( SCREEN_BOTTOM, 32, 32, "256" )
Laser1Frames = FrameStrip.Create( SCREEN_TOP, 16, 8, "256" )
Laser2Frames = FrameStrip.Create( SCREEN_BOTTOM, 16, 8, "256" )
Laser3Frames = FrameStrip.Create( SCREEN_BOTTOM, 16, 8, "256" )
Laser4Frames = FrameStrip.Create( SCREEN_TOP, 16, 8, "256" )
Life1Frames  = FrameStrip.Create( SCREEN_TOP, 64, 64, "256" )
Life2Frames  = FrameStrip.Create( SCREEN_BOTTOM, 64, 64, "256" )
Explosion1Frames  = FrameStrip.Create( SCREEN_TOP, 32, 32, "256" )
Explosion2Frames  = FrameStrip.Create( SCREEN_BOTTOM, 32, 32, "256" )

Jet1Frames:LoadBin( "jet1.raw", 1 )
Jet2Frames:LoadBin( "jet2.raw", 1 )
Laser1Frames:LoadBin( "laser1.raw", 1 )
Laser2Frames:LoadBin( "laser2.raw", 1 )
Laser3Frames:LoadBin( "laser1.raw", 1 )
Laser4Frames:LoadBin( "laser2.raw", 1 )
Life1Frames:LoadBin( "life.raw", 5 )
Life2Frames:LoadBin( "life.raw", 5 )
Explosion1Frames:LoadBin( "explosion.raw", 5 )
Explosion2Frames:LoadBin( "explosion.raw", 5 )

ModIntro = Music.LoadMod( "intro.mod" )

nX     = 104
nY     = 50
nA     = 104
nB     = 50
nvX    = 0
nvY    = 0
nvA    = 0
nvB    = 0

Jet1   = Sprite.Create( Jet1Frames, 0, PALETTE_JET1, nA, nB )
Jet2   = Sprite.Create( Jet2Frames, 0, PALETTE_JET2, nX, nY )
Life1  = Sprite.Create( Life1Frames, 4, PALETTE_LIFE, 1, 64 )
Life2  = Sprite.Create( Life2Frames, 4, PALETTE_LIFE, 247, 64 )
Laser1 = nil
Laser2 = nil
Laser3 = nil
Laser4 = nil
----------------------------------------------------------------------------------------------
function Laser1Check()
if nvB > 191 then
Laser1:Free()
    Laser1 = nil
if Laser1 == nil then
nvC = nvB - 191
Laser3   = Sprite.Create( Laser3Frames, 0, PALETTE_LASER3, nvA, nvC )
end
end
end
----------------------------------------------------------------------------------------------
function Laser2Check()
if nvY < 1 then
Laser2:Free()
    Laser2 = nil
if Laser2 == nil then
nvZ = nvY + 191
Laser4   = Sprite.Create( Laser4Frames, 0, PALETTE_LASER4, nvX, nvZ )
end
end
end
----------------------------------------------------------------------------------------------
function Laser3Check()
if nvC > 191 then
Laser3:Free()
    Laser3 = nil
end
end
----------------------------------------------------------------------------------------------
function Laser4Check()
if nvZ < 1 then
Laser4:Free()
    Laser4 = nil
end
end
----------------------------------------------------------------------------------------------
while true do
  ModIntro:Play()

  Jet1:MoveTo( nA, nB )
  Jet2:MoveTo( nX, nY )

  if Pads.Right() then
nX = nX + 3
  end

  if nX >= 224 then
nX = nX - 3
  end

  if Pads.Left() then
nX = nX - 3
  end

  if nX <= 0 then
nX = nX + 3
  end

  if Pads.Up() then
nY = nY - 3
  end

  if nY <= 0 then
nY = nY + 3
  end

  if Pads.Down() then
nY = nY + 3
  end

  if nY >= 160 then
nY = nY - 3
  end

  if Pads.A() then
nA = nA + 3
  end

  if nA >= 224 then
nA = nA - 3
  end

  if Pads.Y() then
nA = nA - 3
  end

  if nA <= 0 then
nA = nA + 3
  end

  if Pads.X() then
nB = nB - 3
  end

  if nB <= 0 then
nB = nB + 3
  end

  if Pads.B() then
nB = nB + 3
  end

  if nB >= 160 then
nB = nB - 3
  end

  if ButtonDown ( "R" ) then
    nvA     = nA + 8
    nvB     = nB
  Laser1   = Sprite.Create( Laser1Frames, 0, PALETTE_LASER1, nvA, nvB )
  end

  if ButtonDown ( "L" ) then
    nvX     = nX + 8
    nvY     = nY
  Laser2   = Sprite.Create( Laser2Frames, 0, PALETTE_LASER2, nvX, nvY )
  end

  if ( Laser1 ~= nil ) then
    nvB     = nvB + 3
    Laser1:MoveTo( nvA, nvB )
    Laser1Check()
  end

  if ( Laser2 ~= nil ) then
    nvY     = nvY - 3
    Laser2:MoveTo( nvX, nvY )
    Laser2Check()
  end

  if ( Laser3 ~= nil ) then
    nvC     = nvC + 3
    Laser3:MoveTo( nvA, nvC )
    Laser3Check()
  end

  if ( Laser4 ~= nil ) then
    nvZ     = nvZ - 3
    Laser4:MoveTo( nvX, nvZ )
    Laser4Check()
  end

  if Pads.Start() then
    break
  end

  Screen.WaitForVBL()
end

Jet1Frames:FreeAll()
Jet2Frames:FreeAll()
Laser1Frames:FreeAll()
Laser2Frames:FreeAll()
Laser3Frames:FreeAll()
Laser4Frames:FreeAll()
ModIntro:Free()