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beginning of spacewar! / asteroids type game
#1
This started as an old VB6 Asteroids type game by someone named Tassadar that I downloaded from planetsourcecode.com years ago, and converted to QB64. 

It's very easy to understand and modify to make something more interesting. 

The next thing I would like to figure out is how to change how it handles x/y velocity for smoother more natural acceleration / momentum.

Enjoy

Code: (Select All)
_Title "Collisions"

' Original VB6 code for "Collisions" by Tassadar,
' found on PlanetSourceCode.com in 2001.
' Converted to QB64 by madscijr.

' DATE         WHO-DONE-IT   DID-WHAT
' 2001-06-10   Tassadar      created program
' 2022-11-01   madscijr      v0.19, got it working in QB64, added some tweaks

' DONE:
' * get it working in QB64 + tweak various calculations
' * random enemy radius (wider range with each level)
' * added variables for bullet lifespan, bullet radius
' * bullets can wrap around screen
' * bullet-bullet collisions
' * bonus shields at end of round
' * are you lookin' at me??

' TODO:
' * track x/y velocity differently (movement is jerky)
' * option: enemies can shoot each other
' * option: fire button auto-repeat
' * support simple polygon shapes
' * improve collisions
' * support higher resolution upto 4k to fit lots of stuff on screen
' * local multiplayer Spacewar! (upto 16 players)
' * sound effects
' * explosions and stuff
' * menu + customize input + options
' * sun and gravity
' * asteroids
' * enemies can move + enemy AI
' * vary difficulty + scoring based on difficulty
' * limited fuel/ammo
' * player must dock with space station for more fuel/ammo/repair
' * gravity for large asteroids/moons
' * lunar lander mode, players land moons/asteroids to refuel, etc.
' * attack opponents' bases, etc.
' * etc.

' ORIGINAL CREDITS:
'********************************************************************************
'*            This is My Program, I made it to show some trig stuff             *
'* and got a little carried away, but it shows how to do trigonometry anyways   *
'*                                                                              *
'*    You are permitted to do whatever you want with this code                  *
'*        eg. Feel free to modify this code, steal it, etc.                     *
'*               I don't really give a crap!                                    *
'*                                                                              *
'* Programmed by Tassadar                                                       *
'********************************************************************************

' USEFUL CONSTANTS
Const FALSE = 0
Const TRUE = Not FALSE
'Const Pi = 3.14159 ' Pi , bit obvious

Const iFPS = 60 ' Delay between frames (frames per second)

Const SHIP_RADIUS = 10 ' What is the radius of the players ship
Const BULLET_RADIUS = 2 ' What is the radius of the bullets
Const SHIP_ACCEL = 0.05 ' 0.1 ' how fast does it accelerate
Const MAX_SPEED = 12 ' 6 ' what is the ships max speed
Const SHOOT_DELAY = 200 ' Delay between shots for the ship
Const BULLET_SPEED = 9 ' 6 ' Bullet speed - Ship speed + bullet speed = overall bulletspeed
Const BULLET_LIFESPAN = 1 ' # seconds bullet is alive
Const BULLETS_STOP_BULLETS = TRUE

Const TURN_SPEED = 72 ' 36=faster 18=superfast

Const MIN_ENEMY_RADIUS = 6 ' What is the initial minimum radius of the enemy ships
Const MAX_ENEMY_RADIUS = 99 ' What is the initial maximum radius of the enemy ships

Const iMinX = 1
Const iMaxX = 800
Const iMinY = 1
Const iMaxY = 640

Const BULLET_DAMAGE = 5
Const WRAP_BULLET = TRUE
Const BONUS_SHIELDS = 50

Type ShipType
    xPos As Integer ' X co-ordinate of the ship
    yPos As Integer ' Y co-ordinate of the ship
    heading As Single ' which direction is the ship heading
    facing As Single ' which direction is the ship facing
    shields As Integer ' how much shields does the ship have
    speed As Single ' how fast is the ship going
    ShootTime As Long
    ShootCount As Long
End Type ' ShipType

Type EnemyType
    xPos As Integer ' X position of this enemy
    yPos As Integer ' Y position of this enemy
    life As Integer ' How much life does this enemy have
    alive As Integer ' Is this enemy alive
    radius As Integer ' size of enemy ship
End Type ' EnemyType

Type BulletType
    xPos As Integer ' X co-ordinate of this bullet
    yPos As Integer ' Y co-ordinate of this bullet
    heading As Single ' Direction this bullet is heading
    speed As Single ' Speed of this bullet
    alive As Integer ' Is this bullet alive
    kind As String ' What type of bullet is this (Players or enemies)
    lifespan As Long
    lifetime As Long
End Type ' BulletType

'' ENABLE / DISABLE DEBUG CONSOLE
'Dim Shared m_bDebug As Integer: m_bDebug = TRUE

' BASIC PROGRAM METADATA
Dim Shared m_ProgramPath$: m_ProgramPath$ = Left$(Command$(0), _InStrRev(Command$(0), "\"))
Dim Shared m_ProgramName$: m_ProgramName$ = Mid$(Command$(0), _InStrRev(Command$(0), "\") + 1)

' OTHER USEFUL VARIABLES
Dim Shared PI As Single: PI = 4 * Atn(1)
Dim Shared ENGINE_RADIUS As Integer: ENGINE_RADIUS = SHIP_RADIUS * 0.6
Dim Shared FLAME_RADIUS As Integer: FLAME_RADIUS = SHIP_RADIUS * 2

' GAME STATE
Dim Shared m_bGameOver As Integer ' Is the game over
Dim Shared m_bAllDead As Integer ' Are all the enemies dead
Dim Shared m_iLevel As Integer ' Track the level
Dim Shared m_iScore As Integer ' Keeps track of player score
Dim Shared m_iMinEnemyRadius As Integer ' current minimum enemy radius
Dim Shared m_iMaxEnemyRadius As Integer ' current maximum enemy radius

' INPUT VARIABLES
Dim Shared m_bLeftKey As Integer ' Is the LeftKey depressed
Dim Shared m_bRightKey As Integer ' Is the RightKey depressed
Dim Shared m_bUpKey As Integer ' Is the UpKey depressed
Dim Shared m_bDownKey As Integer ' Is the DownKey depressed
Dim Shared m_bShootKey As Integer ' Is the ShootKey depressed
Dim Shared m_bCheatKey As Integer
Dim Shared m_bEscKey As Integer

' GAME OBJECTS
Dim Shared m_Ship As ShipType ' The Players Ship
ReDim Shared m_arrEnemy(-1) As EnemyType ' A nice array of enemies
ReDim Shared m_arrBullet(-1) As BulletType ' A nice array of Bullets

'' ****************************************************************************************************************************************************************
'' ACTIVATE DEBUGGING WINDOW
'If m_bDebug = TRUE Then
'    $Console
'    _Delay 4
'    _Console On
'    _Echo "Started " + m_ProgramName$
'    _Echo "Debugging on..."
'End If
'' ****************************************************************************************************************************************************************

' START THE GAME
main

' FINISHED
System ' return control to the operating system

'' ****************************************************************************************************************************************************************
'' DEACTIVATE DEBUGGING WINDOW
'If m_bDebug = TRUE Then
'    _Console Off
'End If
' ****************************************************************************************************************************************************************

' ++++++++++++++++++++++++++++++++++++++++++++++++++++++++++++++++++++++++++++++++++++++++++++++++++++++++++++++++++++++++++++++++++++++++++++++++++++++++++++++++
' BEGIN GAME CODE
' ++++++++++++++++++++++++++++++++++++++++++++++++++++++++++++++++++++++++++++++++++++++++++++++++++++++++++++++++++++++++++++++++++++++++++++++++++++++++++++++++

' /////////////////////////////////////////////////////////////////////////////

Sub main ()
    Dim RoutineName As String: RoutineName = "main"

    Screen _NewImage(iMaxX, iMaxY, 32) ' 100 text columns x 40 text rows
    _KeyClear
   
    InitVariables ' Initialize variables
   
    Do ' main game loop
        Cls ' Clear the form
        GetInput
        If m_bEscKey = FALSE Then
            MoveBullets ' Activates the MoveBullets sub
            MoveShip ' Activates the MoveShip sub
            MoveEnemy ' (doesn't do much yet)
            Collisions ' Activates the Collisions sub
        Else
            m_bGameOver = TRUE
        End If
       
        If m_bGameOver = FALSE Then
            Shooting ' Activates the Shooting sub
            DrawEnemy ' Activates the DrawEnemy sub
            DrawBullets ' Activates the DrawBullets sub
            ShowScore ' Display the score, etc.
            DrawShip ' Activates the DrawShip sub
            Respawn ' Activates the Respawn sub
        Else
            If AskPlayAgain% = TRUE Then
                InitVariables
            Else
                Exit Do
            End If
        End If

        ' UPDATE THE SCREEN
        _Display
       
        ' CONTROL GAME SPEED
        _Limit iFPS
    Loop
   
    ' RETURN TO AUTODISPLAY
    _AutoDisplay
   
End Sub ' main

' /////////////////////////////////////////////////////////////////////////////

Function AskPlayAgain%
    Dim bResult As Integer
    Dim in$
   
    Cls
    Print "GAME OVER"
    Print
    Print "Level: " + cstr$(m_iLevel)
    Print "Score: " + cstr$(m_iScore)
    Print
    Do
        Input "Do you wish to try again (y/n) "; in$
        If LCase$(_Trim$(in$)) = "y" Then
            bResult = TRUE
            Exit Do
        ElseIf LCase$(_Trim$(in$)) = "n" Then
            bResult = FALSE
            Exit Do
        Else
            Print
            Print "Please type 'y' or 'n'"
            Print
        End If
    Loop
   
    AskPlayAgain% = bResult
End Function ' AskPlayAgain%

' /////////////////////////////////////////////////////////////////////////////
' Set the initial state for variables

Sub InitVariables ()
    Dim iLoop1 As Integer ' Used for variables
    Dim iSpread As Integer
    Dim iHalf As Integer
    Dim iDivisor As Integer
   
    ' Msgbox telling you how to play
    'MsgBox "Use the arrow keys to fly around" + vbCrLf + "Control to shoot", vbOKOnly, "How To Play"
   
    ' Score
    m_iLevel = 1
    m_iScore = 0
   
    ' Game status
    m_bGameOver = FALSE
   
    ' Enemy min/max radius
    iSpread = MAX_ENEMY_RADIUS - MIN_ENEMY_RADIUS
    iHalf = iSpread / 2
    iDivisor = iSpread / 10
    m_iMinEnemyRadius = iHalf - iDivisor
    If m_iMinEnemyRadius < MIN_ENEMY_RADIUS Then m_iMinEnemyRadius = MIN_ENEMY_RADIUS
    m_iMaxEnemyRadius = iHalf + iDivisor
    If m_iMaxEnemyRadius > MAX_ENEMY_RADIUS Then m_iMaxEnemyRadius = MAX_ENEMY_RADIUS
   
    ' Clear input flags
    m_bLeftKey = FALSE
    m_bRightKey = FALSE
    m_bUpKey = FALSE
    m_bDownKey = FALSE
    m_bShootKey = FALSE
   
    ' Set the starting positions of the ship
    m_Ship.heading = 0
    m_Ship.facing = 0
    m_Ship.shields = 100
    m_Ship.speed = 0
    m_Ship.xPos = RandomNumber%(iMinX, iMaxX) 'Int(Rnd * ScaleWidth + 1)
    m_Ship.yPos = RandomNumber%(iMinY, iMaxY) 'Int(Rnd * ScaleHeight + 1)
    m_Ship.ShootTime = iFPS \ 4
    m_Ship.ShootCount = m_Ship.ShootTime + 1
   
    ' Spawn enemy
    ReDim _Preserve m_arrEnemy(0) As EnemyType
    For iLoop1 = 0 To UBound(m_arrEnemy)
        ' Set the starting position of the enemies
        m_arrEnemy(iLoop1).alive = TRUE
        m_arrEnemy(iLoop1).life = 30
        m_arrEnemy(iLoop1).xPos = m_Ship.xPos
        m_arrEnemy(iLoop1).yPos = m_Ship.yPos
       
        ' choose a random size
        m_arrEnemy(iLoop1).radius = RandomNumber%(m_iMinEnemyRadius, m_iMaxEnemyRadius)
       
        ' Stops the enemy starting on top of the ship
        Do Until GetDist(m_arrEnemy(iLoop1).xPos, m_arrEnemy(iLoop1).yPos, m_Ship.xPos, m_Ship.yPos) > SHIP_RADIUS * 10
            m_arrEnemy(iLoop1).xPos = RandomNumber%(iMinX, iMaxX) 'Int(Rnd * ScaleWidth + 1)
            m_arrEnemy(iLoop1).yPos = RandomNumber%(iMinY, iMaxY) 'Int(Rnd * ScaleHeight + 1)
        Loop
    Next iLoop1
   
    ' RESET BULLETS
    ReDim _Preserve m_arrBullet(-1) As BulletType
End Sub ' InitVariables

' /////////////////////////////////////////////////////////////////////////////
' Detect which keys are pressed

Sub GetInput ()
    While _DeviceInput(1): Wend ' clear and update the keyboard buffer
   
    If _Button(KeyCode_Left%) Then
        m_bLeftKey = TRUE
        m_bRightKey = FALSE
    ElseIf _Button(KeyCode_Right%) Then
        m_bLeftKey = FALSE
        m_bRightKey = TRUE
    Else
        m_bLeftKey = FALSE
        m_bRightKey = FALSE
    End If
   
    If _Button(KeyCode_Up%) Then
        m_bUpKey = TRUE
        m_bDownKey = FALSE
    ElseIf _Button(KeyCode_Down%) Then
        m_bUpKey = FALSE
        m_bDownKey = TRUE
    Else
        m_bUpKey = FALSE
        m_bDownKey = FALSE
    End If

    If _Button(KeyCode_CtrlLeft%) Then
        m_bShootKey = TRUE
    ElseIf _Button(KeyCode_CtrlRight%) Then
        m_bShootKey = TRUE
    Else
        m_bShootKey = FALSE
    End If

    If _Button(KeyCode_1%) Then
        m_bCheatKey = TRUE
    Else
        m_bCheatKey = FALSE
    End If
   
    If _Button(KeyCode_Escape%) Then
        m_bEscKey = TRUE
    Else
        m_bEscKey = FALSE
    End If
   
    ' CLEAR KEYBOARD BUFFER
    _KeyClear

End Sub ' GetInput

' /////////////////////////////////////////////////////////////////////////////
' Check for collisions

' TODO: improve collision checking to handle different shape polygons, etc.

Sub Collisions ()
    Dim iLoop1 As Integer
    Dim iLoop2 As Integer
    Dim in$
   
    ' Check for bullet collisions
    For iLoop1 = 0 To UBound(m_arrBullet)
       
        ' IS THIS BULLET ALIVE?
        If m_arrBullet(iLoop1).alive = TRUE Then
           
            ' CHECK FOR BULLET HIT BULLET
            For iLoop2 = 0 To UBound(m_arrBullet)
                If iLoop2 <> iLoop1 Then
                    If BULLETS_STOP_BULLETS = TRUE Then
                        If GetDist(m_arrBullet(iLoop2).xPos, m_arrBullet(iLoop2).yPos, m_arrBullet(iLoop1).xPos, m_arrBullet(iLoop1).yPos) <= BULLET_RADIUS Then
                            ' BOTH SHOTS DESTROYED
                            m_arrBullet(iLoop1).alive = FALSE ' Destroy the bullet
                            m_arrBullet(iLoop2).alive = FALSE ' Destroy the other bullet
                        End If
                    End If
                End If
            Next iLoop2
        End If
       
        ' IS THIS BULLET STILL ALIVE?
        If m_arrBullet(iLoop1).alive = TRUE Then
           
            ' CHECK ENEMY BULLET
            If m_arrBullet(iLoop1).kind = "ENEMY" Then
                ' Check for collision between bullet and ship
                If GetDist(m_Ship.xPos, m_Ship.yPos, m_arrBullet(iLoop1).xPos, m_arrBullet(iLoop1).yPos) <= SHIP_RADIUS Then
                    m_Ship.shields = m_Ship.shields - BULLET_DAMAGE ' Take Damage
                    m_arrBullet(iLoop1).alive = FALSE ' Destroy the bullet
                End If
            Else
                ' CHECK FOR PLAYER'S BULLET
                If m_arrBullet(iLoop1).kind = "SHIP" Then
                    For iLoop2 = 0 To UBound(m_arrEnemy)
                        ' If the enemy is alive then
                        If m_arrEnemy(iLoop2).alive = TRUE Then
                            ' Check for collision between bullet and enemy
                            If GetDist(m_arrEnemy(iLoop2).xPos, m_arrEnemy(iLoop2).yPos, m_arrBullet(iLoop1).xPos, m_arrBullet(iLoop1).yPos) <= m_arrEnemy(iLoop2).radius Then
                                m_arrEnemy(iLoop2).life = m_arrEnemy(iLoop2).life - BULLET_DAMAGE ' Enemy take damage
                                m_arrBullet(iLoop1).alive = FALSE ' Destroy the bullet
                            End If
                        End If
                    Next iLoop2
                End If
            End If
        End If
    Next iLoop1
   
    ' CHECK FOR SHIP COLLIDING WITH ENEMY
    For iLoop1 = 0 To UBound(m_arrEnemy)
        ' If the enemy is alive then
        If m_arrEnemy(iLoop1).alive = TRUE Then
            ' Check for collision between ship and enemy
            If GetDist(m_Ship.xPos, m_Ship.yPos, m_arrEnemy(iLoop1).xPos, m_arrEnemy(iLoop1).yPos) <= m_arrEnemy(iLoop1).radius Then
                m_arrEnemy(iLoop1).life = 0 ' The enemy has no life/Dead
                m_Ship.shields = 0 ' The ship has no shields/Dead
            End If
           
            ' if the enemy is dead then destroy it, add to score
            If m_arrEnemy(iLoop1).life <= 0 Then
                m_arrEnemy(iLoop1).alive = FALSE
                m_iScore = m_iScore + 10
            End If
        End If
    Next iLoop1
   
    ' IS SHIP DEAD?
    If m_Ship.shields <= 0 Then
        '' Display the message box
        'iLoop1 = MsgBox("You have a score of " & m_iScore & vbCrLf & vbCrLf & "Do you wish to try again?", vbYesNo, "Try Again")
        'Select Case iLoop1
        '    Case vbYes
        '        ' Restart if yes is clicked
        '        InitVariables
        '    Case vbNo
        '        ' End if no clicked
        '        End
        'End Select
        m_bGameOver = TRUE
    End If
End Sub ' Collisions

' /////////////////////////////////////////////////////////////////////////////

Sub Shooting ()
    Dim iLoop1 As Integer ' Used for variables
    Dim iLoop2 As Integer ' Used for variables
    Dim iFreeSpot As Integer
    Dim sngXComp As Single
    Dim sngYComp As Single

    ' DID PLAYER SHOOT?
    If m_bShootKey = TRUE Then
        ' Has the gun cooled down yet (prevent bullet being created every 25 milliseconds)
       
        If m_Ship.ShootCount > m_Ship.ShootTime Then
            m_Ship.ShootCount = 0
           
            iFreeSpot = -1
           
            For iLoop1 = 0 To UBound(m_arrBullet)
                ' Check whether it can use another bullet or not
                If m_arrBullet(iLoop1).alive = FALSE Then
                    ' if so use the dead bullet
                    iFreeSpot = iLoop1
                    Exit For
                End If
            Next iLoop1
            ' if there were no already dead bullets
            If iFreeSpot = -1 Then
                ' create another one
                ReDim _Preserve m_arrBullet(UBound(m_arrBullet) + 1) As BulletType

                ' iFreeSpot is this new bullet
                iFreeSpot = UBound(m_arrBullet)
            End If

            ' Set the properties of this bullet
            m_arrBullet(iFreeSpot).alive = TRUE ' The bullet is alive
            m_arrBullet(iFreeSpot).xPos = m_Ship.xPos ' the bullet is created where the ship is
            m_arrBullet(iFreeSpot).yPos = m_Ship.yPos ' the bullet is created where the ship is
            m_arrBullet(iFreeSpot).kind = "SHIP" ' This is a Ship Bullet
            m_arrBullet(iFreeSpot).lifespan = BULLET_LIFESPAN * iFPS ' # seconds bullet is alive
            m_arrBullet(iFreeSpot).lifetime = 0 ' bullet is brand new
           
            ' Determine the X and Y components of the resultant vector
            sngXComp = m_Ship.speed * Sin(m_Ship.heading) + BULLET_SPEED * Sin(m_Ship.facing)
            sngYComp = m_Ship.speed * Cos(m_Ship.heading) + BULLET_SPEED * Cos(m_Ship.facing)

            ' Determine the resultant speed
            m_arrBullet(iFreeSpot).speed = Sqr(sngXComp ^ 2 + sngYComp ^ 2)

            'Calculate the resultant heading, and adjust for arctangent by adding Pi if necessary
            If Sgn(sngYComp) > 0 Then
                m_arrBullet(iFreeSpot).heading = Atn(sngXComp / sngYComp)
            End If
            If Sgn(sngYComp) < 0 Then
                m_arrBullet(iFreeSpot).heading = Atn(sngXComp / sngYComp) + PI
            End If
        End If
    End If
   
    ' ENEMIES SHOOT
    For iLoop1 = 0 To UBound(m_arrEnemy)
        ' Check whether the enemy is alive
        If m_arrEnemy(iLoop1).alive = TRUE Then
            ' Check whether the enemy will fire or not
            If Int(Rnd * 100 + 1) = 1 Then
                iFreeSpot = -1
               
                For iLoop2 = 0 To UBound(m_arrBullet)
                    ' Check whether the enemy will use an old bullet
                    If m_arrBullet(iLoop2).alive = FALSE Then
                        ' If so iFreeSpot is the old bullet
                        iFreeSpot = iLoop2
                        Exit For
                    End If
                Next iLoop2
               
                ' If there were no free spots then create another bullet
                If iFreeSpot = -1 Then
                    ' Create the new bullet
                    ReDim _Preserve m_arrBullet(UBound(m_arrBullet) + 1) As BulletType
                    ' iFreeSpot is this new bullet
                    iFreeSpot = UBound(m_arrBullet)
                End If
               
                ' Set the properties for this bullet
                m_arrBullet(iFreeSpot).alive = TRUE ' It is Alive!!!
               
                ' Set it so the bullet shoots at the ship
                m_arrBullet(iFreeSpot).heading = GetAngle(m_arrEnemy(iLoop1).xPos, m_arrEnemy(iLoop1).yPos, m_Ship.xPos, m_Ship.yPos)
                m_arrBullet(iFreeSpot).xPos = m_arrEnemy(iLoop1).xPos ' Create the bullet where the enemy is
                m_arrBullet(iFreeSpot).yPos = m_arrEnemy(iLoop1).yPos ' Create the bullet where the enemy is
                m_arrBullet(iFreeSpot).speed = 6 ' Set the bullet speed
                m_arrBullet(iFreeSpot).kind = "ENEMY" ' This is an enemy bullet
                m_arrBullet(iFreeSpot).lifespan = BULLET_LIFESPAN * iFPS ' # seconds bullet is alive
                m_arrBullet(iFreeSpot).lifetime = 0 ' bullet is brand new
               
                ' Move bullet outside of enemy
                m_arrBullet(iFreeSpot).xPos = m_arrBullet(iFreeSpot).xPos + ((m_arrEnemy(iLoop1).radius + 1) * Sin(m_arrBullet(iFreeSpot).heading))
                m_arrBullet(iFreeSpot).yPos = m_arrBullet(iFreeSpot).yPos - ((m_arrEnemy(iLoop1).radius + 1) * Cos(m_arrBullet(iFreeSpot).heading))
               
            End If
        End If
    Next iLoop1
   
End Sub ' Shooting

' /////////////////////////////////////////////////////////////////////////////
' Draw the enemies

Sub DrawEnemy ()
    Dim iLoop1 As Integer ' Used for variables
    Dim iLoop2 As Integer ' Used for variables
    Dim iColor As _Unsigned Long
    Dim iX As Integer
    Dim iY As Integer
    Dim sngHeading As Single
    Dim iRadius As Integer
   
    For iLoop1 = 0 To UBound(m_arrEnemy)
        ' Is this enemy alive
        If m_arrEnemy(iLoop1).alive = TRUE Then
            ' Color based on damage
            If m_arrEnemy(iLoop1).life >= 30 Then
                iColor = cWhite
            ElseIf m_arrEnemy(iLoop1).life > 25 Then
                iColor = cYellow
            ElseIf m_arrEnemy(iLoop1).life > 20 Then
                iColor = cGold
            ElseIf m_arrEnemy(iLoop1).life > 15 Then
                iColor = cOrange
            ElseIf m_arrEnemy(iLoop1).life > 10 Then
                iColor = cDarkOrange
            ElseIf m_arrEnemy(iLoop1).life > 5 Then
                iColor = cOrangeRed
            Else
                iColor = cRed
            End If
           
            ' Draw body
            ' CIRCLE (x, y), radius, color
            'DrawCircleSolid iX, iY, 8, cRed
            Circle (m_arrEnemy(iLoop1).xPos, m_arrEnemy(iLoop1).yPos), m_arrEnemy(iLoop1).radius, iColor
           
            ' Draw "eye"
            sngHeading = GetAngle(m_arrEnemy(iLoop1).xPos, m_arrEnemy(iLoop1).yPos, m_Ship.xPos, m_Ship.yPos)
            iX = m_arrEnemy(iLoop1).xPos
            iY = m_arrEnemy(iLoop1).yPos
            iRadius = m_arrEnemy(iLoop1).radius / 3
            iX = iX + (m_arrEnemy(iLoop1).radius - iRadius) * Sin(sngHeading)
            iY = iY - (m_arrEnemy(iLoop1).radius - iRadius) * Cos(sngHeading)
            Circle (iX, iY), iRadius, iColor
           
        End If
    Next iLoop1
End Sub ' DrawEnemy

' /////////////////////////////////////////////////////////////////////////////
' Move Bullets

Sub MoveBullets ()
    Dim iLoop1 As Integer ' Used for variables
   
    If m_Ship.ShootCount <= m_Ship.ShootTime Then
        m_Ship.ShootCount = m_Ship.ShootCount + 1
    End If
   
    For iLoop1 = 0 To UBound(m_arrBullet)
        ' Is the bullet alive
        If m_arrBullet(iLoop1).alive = TRUE Then
            ' Move the bullets
            m_arrBullet(iLoop1).xPos = m_arrBullet(iLoop1).xPos + (m_arrBullet(iLoop1).speed * Sin(m_arrBullet(iLoop1).heading))
            m_arrBullet(iLoop1).yPos = m_arrBullet(iLoop1).yPos - (m_arrBullet(iLoop1).speed * Cos(m_arrBullet(iLoop1).heading))
           
            ' Did the bullet move off screen horizontally?
            If m_arrBullet(iLoop1).xPos < iMinX Then
                If WRAP_BULLET = TRUE Then
                    m_arrBullet(iLoop1).xPos = iMaxX
                Else
                    m_arrBullet(iLoop1).alive = FALSE ' Destroy the bullet
                End If
            ElseIf m_arrBullet(iLoop1).xPos > iMaxX Then
                If WRAP_BULLET = TRUE Then
                    m_arrBullet(iLoop1).xPos = iMinX
                Else
                    m_arrBullet(iLoop1).alive = FALSE ' Destroy the bullet
                End If
            End If
           
            ' Did the bullet move off screen vertically?
            If m_arrBullet(iLoop1).yPos < iMinY Then
                If WRAP_BULLET = TRUE Then
                    m_arrBullet(iLoop1).yPos = iMaxY
                Else
                    m_arrBullet(iLoop1).alive = FALSE ' Destroy the bullet
                End If
            ElseIf m_arrBullet(iLoop1).yPos > iMaxY Then
                If WRAP_BULLET = TRUE Then
                    m_arrBullet(iLoop1).yPos = iMinY
                Else
                    m_arrBullet(iLoop1).alive = FALSE ' Destroy the bullet
                End If
            End If
           
            ' Time how long bullet stays active
            m_arrBullet(iLoop1).lifetime = m_arrBullet(iLoop1).lifetime + 1
            If m_arrBullet(iLoop1).lifetime > m_arrBullet(iLoop1).lifespan Then
                m_arrBullet(iLoop1).alive = FALSE ' Destroy the bullet
            End If
           
        End If
    Next iLoop1
End Sub ' MoveBullets

' /////////////////////////////////////////////////////////////////////////////
' Draw the bullets

Sub DrawBullets ()
    Dim iLoop1 As Integer ' Used for variables
    For iLoop1 = 0 To UBound(m_arrBullet)
        ' Is the bullet alive
        If m_arrBullet(iLoop1).alive = TRUE Then
            If m_arrBullet(iLoop1).kind = "SHIP" Then
                ' Is this a ship bullet, draw a white bullet
                'Circle (m_arrBullet(iLoop1).xPos, m_arrBullet(iLoop1).yPos), 3, cWhite
                DrawCircleSolid m_arrBullet(iLoop1).xPos, m_arrBullet(iLoop1).yPos, BULLET_RADIUS, cWhite
               
            ElseIf m_arrBullet(iLoop1).kind = "ENEMY" Then
                ' if this is enemy bullet, draw a red bullet
                'Circle (m_arrBullet(iLoop1).xPos, m_arrBullet(iLoop1).yPos), 3, cOrangeRed
                DrawCircleSolid m_arrBullet(iLoop1).xPos, m_arrBullet(iLoop1).yPos, BULLET_RADIUS, cOrangeRed
            End If
        End If
    Next iLoop1
End Sub ' DrawBullets

' /////////////////////////////////////////////////////////////////////////////
' Move the ship
Sub MoveShip ()
    Dim sngXComp As Single
    Dim sngYComp As Single
   
    ' If the left key is pressed then rotate the ship left
    If m_bLeftKey = TRUE Then
        m_Ship.facing = m_Ship.facing - PI / TURN_SPEED
    End If
   
    ' If the Right key is pressed then rotate the ship right
    If m_bRightKey = TRUE Then
        m_Ship.facing = m_Ship.facing + PI / TURN_SPEED
    End If
   
    ' If the up key is pressed then and accelerate it in the direction the ship is facing
    If m_bUpKey = TRUE Then
        ' ****************************************************************************************************************************************************************
        ' ****************************************************************************************************************************************************************
        ' ****************************************************************************************************************************************************************
        ' TODO: fix this to make the movement more natural...
       
        ' Determine the X and Y components of the resultant vector
        sngXComp = m_Ship.speed * Sin(m_Ship.heading) + SHIP_ACCEL * Sin(m_Ship.facing)
        sngYComp = m_Ship.speed * Cos(m_Ship.heading) + SHIP_ACCEL * Cos(m_Ship.facing)
       
        ' Determine the resultant speed
        m_Ship.speed = Sqr(sngXComp ^ 2 + sngYComp ^ 2)
       
        ' Calculate the resultant heading, and adjust for arctangent by adding Pi if necessary
        If Sgn(sngYComp) > 0 Then
            m_Ship.heading = Atn(sngXComp / sngYComp)
        End If
        If Sgn(sngYComp) < 0 Then
            m_Ship.heading = Atn(sngXComp / sngYComp) + PI
        End If
       
        ' ****************************************************************************************************************************************************************
        ' ****************************************************************************************************************************************************************
        ' ****************************************************************************************************************************************************************
    End If
   
    ' If the down key is pressed then and accelerate the ship in the opposite direction it is facing
    If m_bDownKey = TRUE And m_Ship.speed > -MAX_SPEED Then
        ' Determine the X and Y components of the resultant vector
        sngXComp = m_Ship.speed * Sin(m_Ship.heading) - SHIP_ACCEL * Sin(m_Ship.facing)
        sngYComp = m_Ship.speed * Cos(m_Ship.heading) - SHIP_ACCEL * Cos(m_Ship.facing)
       
        ' Determine the resultant speed
        m_Ship.speed = Sqr(sngXComp ^ 2 + sngYComp ^ 2)
       
        ' Calculate the resultant heading, and adjust for actangent by adding Pi if necessary
        If Sgn(sngYComp) > 0 Then
            m_Ship.heading = Atn(sngXComp / sngYComp)
        End If
        If Sgn(sngYComp) < 0 Then
            m_Ship.heading = Atn(sngXComp / sngYComp) + PI
        End If
    End If
   
    ' Did player hit cheat key?
    If m_bCheatKey = TRUE Then
        m_Ship.shields = m_Ship.shields + 10
    End If
   
    ' Don't let the ship go faster then the max speed
    If m_Ship.speed > MAX_SPEED Then
        m_Ship.speed = MAX_SPEED
    End If
   
    ' Move the ship
    m_Ship.xPos = m_Ship.xPos + m_Ship.speed * Sin(m_Ship.heading)
    m_Ship.yPos = m_Ship.yPos - m_Ship.speed * Cos(m_Ship.heading)
   
    ' Keep the ship inside the form
    If m_Ship.xPos < iMinX Then
        m_Ship.xPos = iMaxX
    End If
    If m_Ship.xPos > iMaxX Then
        m_Ship.xPos = iMinX
    End If
    If m_Ship.yPos < iMinY Then
        m_Ship.yPos = iMaxY
    End If
    If m_Ship.yPos > iMaxY Then
        m_Ship.yPos = iMinY
    End If
End Sub ' MoveShip

' /////////////////////////////////////////////////////////////////////////////
' Placeholder

Sub MoveEnemy ()
    Dim iLoop1 As Integer
    'For iLoop1 = 0 To UBound(m_arrEnemy)
    '    ' Check whether the enemy is alive
    '    If m_arrEnemy(iLoop1).alive = TRUE Then
    '    End If
    'Next iLoop1
End Sub ' MoveEnemy

' /////////////////////////////////////////////////////////////////////////////

Sub ShowScore
    ' Draw background
    Color cBlue, cBlue
    PrintAt 0, 0, String$(120, " ")
   
    ' Place the text on the form
    Color cLime, cEmpty
    PrintAt 0, 10, "Shields: " + cstr$(m_Ship.shields) ' LeftPadString$(cstr$(m_Ship.shields), 5, " ")
   
    ' Title displays the players score
    'frmCollision.Caption = "Score: " & m_iScore
    Color cCyan, cEmpty
    PrintAt 0, 40, "Score: " + cstr$(m_iScore) ' LeftPadString$(cstr$(m_iScore), 10, " ")
   
    ' Display the level
    Color cWhite, cEmpty
    PrintAt 0, 70, "Level: " + cstr$(m_iLevel) ' LeftPadString$(cstr$(m_iScore), 10, " ")
   
    ' Show instructions
    Color cRed, cRed
    PrintAt 39, 0, String$(120, " ")
    Color cWhite, cEmpty
    PrintAt 39, 0, "CONTROLS: LEFT/RIGHT = TURN   UP/DOWN = FORWARD/BACK   CTRL=FIRE   1=ADD SHIELD (CHEAT)"
   
End Sub ' ShowScore

' /////////////////////////////////////////////////////////////////////////////
' Draw the ship

Sub DrawShip ()
    Dim intX1 As Integer
    Dim intY1 As Integer
    Dim intX2 As Integer
    Dim intY2 As Integer
    Dim intX3 As Integer
    Dim intY3 As Integer
   
    Dim intX1b As Integer ' engine flame ends here
    Dim intY1b As Integer ' engine flame ends here
    Dim intX2b As Integer ' back wall starts here on left
    Dim intY2b As Integer ' back wall starts here on left
    Dim intX3b As Integer ' back wall starts here on right
    Dim intY3b As Integer ' back wall starts here on right
   
    ' -----------------------------------------------------------------------------
    ' Set the coordinates of the ship
   
    ' front
    intX1 = m_Ship.xPos + SHIP_RADIUS * Sin(m_Ship.facing)
    intY1 = m_Ship.yPos - SHIP_RADIUS * Cos(m_Ship.facing)
   
    ' left rear
    intX2 = m_Ship.xPos + SHIP_RADIUS * Sin(m_Ship.facing + 2 * PI / 3)
    intY2 = m_Ship.yPos - SHIP_RADIUS * Cos(m_Ship.facing + 2 * PI / 3)
   
    ' left rear (3/4 of the way down)
    intX2b = m_Ship.xPos + ENGINE_RADIUS * Sin(m_Ship.facing + 2 * PI / 3)
    intY2b = m_Ship.yPos - ENGINE_RADIUS * Cos(m_Ship.facing + 2 * PI / 3)
   
    ' right rear
    intX3 = m_Ship.xPos + SHIP_RADIUS * Sin(m_Ship.facing + 4 * PI / 3)
    intY3 = m_Ship.yPos - SHIP_RADIUS * Cos(m_Ship.facing + 4 * PI / 3)

    ' right rear (3/4 of the way down)
    intX3b = m_Ship.xPos + ENGINE_RADIUS * Sin(m_Ship.facing + 4 * PI / 3)
    intY3b = m_Ship.yPos - ENGINE_RADIUS * Cos(m_Ship.facing + 4 * PI / 3)
   
    ' rear where engine flames end
    intX1b = m_Ship.xPos - FLAME_RADIUS * Sin(m_Ship.facing)
    intY1b = m_Ship.yPos + FLAME_RADIUS * Cos(m_Ship.facing)
    'm_Ship.facing = m_Ship.facing - Pi / 36
   
    ' -----------------------------------------------------------------------------
    ' Draw the ship
   
    ' Draw the left side
    Line (intX1, intY1)-(intX2, intY2), cWhite
   
    ' Draw the right side
    Line (intX1, intY1)-(intX3, intY3), cWhite
   
    ' Draw the rear / aft side
    If m_bUpKey Then
        ' Draw rear side
        Line (intX2b, intY2b)-(intX3b, intY3b), cSilver
       
        ' Engine is firing
        'Line (intX2b, intY2b)-(intX3b, intY3b), cOrangeRed
       
        ' Draw the flame left side
        Line (intX1b, intY1b)-(intX2b, intY2b), cOrangeRed
       
        ' Draw the flame right side
        Line (intX1b, intY1b)-(intX3b, intY3b), cOrangeRed
       
    Else
        ' Draw rear side
        Line (intX2b, intY2b)-(intX3b, intY3b), cSilver
    End If
   
End Sub ' DrawShip

' /////////////////////////////////////////////////////////////////////////////
' Respawn the enemies if there all dead

Sub Respawn ()
    Dim iLoop1 As Integer ' Used for variables

    ' Check if all enemies are dead
    m_bAllDead = TRUE
    For iLoop1 = 0 To UBound(m_arrEnemy)
        ' If an enemy is alive then
        If m_arrEnemy(iLoop1).alive = TRUE Then
            ' enemies aren't all dead
            m_bAllDead = FALSE
            Exit For
        End If
    Next iLoop1
   
    ' if all dead, respawn and create one more enemy
    ' advance to next level
    If m_bAllDead = TRUE Then
        ' INCREASE LEVEL
        m_iLevel = m_iLevel + 1
       
        ' GIVE PLAYER SOME BONUS SHIELDS
        m_Ship.shields = m_Ship.shields + BONUS_SHIELDS
       
        ' INCREASE THE NUMBER OF ENEMIES
        ReDim _Preserve m_arrEnemy(UBound(m_arrEnemy) + 1) As EnemyType
       
        ' INCREASE VARIETY OF ENEMY SIZES
        If m_iMinEnemyRadius > MIN_ENEMY_RADIUS Then
            m_iMinEnemyRadius = m_iMinEnemyRadius - 1
        End If
        If m_iMaxEnemyRadius < MAX_ENEMY_RADIUS Then
            m_iMaxEnemyRadius = m_iMaxEnemyRadius + 1
        End If
       
        ' SPAWN NEW WAVE OF ENEMIES
        For iLoop1 = 0 To UBound(m_arrEnemy)
            ' Set the starting positions
            m_arrEnemy(iLoop1).alive = TRUE
            m_arrEnemy(iLoop1).life = 30
            m_arrEnemy(iLoop1).xPos = m_Ship.xPos
            m_arrEnemy(iLoop1).yPos = m_Ship.yPos
           
            ' choose a random size
            m_arrEnemy(iLoop1).radius = RandomNumber%(m_iMinEnemyRadius, m_iMaxEnemyRadius)
           
            ' make sure the enemies don't start on the ship
            Do Until GetDist(m_arrEnemy(iLoop1).xPos, m_arrEnemy(iLoop1).yPos, m_Ship.xPos, m_Ship.yPos) > SHIP_RADIUS * 10
                m_arrEnemy(iLoop1).xPos = RandomNumber%(iMinX, iMaxX) 'Int(Rnd * ScaleWidth + 1)
                m_arrEnemy(iLoop1).yPos = RandomNumber%(iMinY, iMaxY) 'Int(Rnd * ScaleHeight + 1)
            Loop
        Next iLoop1
    End If
End Sub ' Respawn

' /////////////////////////////////////////////////////////////////////////////

Function GetDist! (sngX1 As Single, sngY1 As Single, sngX2 As Single, sngY2 As Single) ' As Single
    Dim sngXComp As Single
    Dim sngYComp As Single
   
    ' Set the X componate
    sngXComp = sngX2 - sngX1
   
    ' Set the Y Componate
    sngYComp = sngY1 - sngY2
   
    ' Get the distance between the two objects
    GetDist = Sqr(sngXComp ^ 2 + sngYComp ^ 2)
End Function ' GetDist

' /////////////////////////////////////////////////////////////////////////////

Function GetAngle (sngX1 As Single, sngY1 As Single, sngX2 As Single, sngY2 As Single)
    Dim sngXComp As Single
    Dim sngYComp As Single
   
    ' Set the X componate
    sngXComp = sngX2 - sngX1
   
    ' Set the Y componate
    sngYComp = sngY1 - sngY2
   
    ' Calculate the resultant angle, and adjust for actangent by adding Pi if necessary
    If Sgn(sngYComp) > 0 Then
        GetAngle = Atn(sngXComp / sngYComp)
    End If
    If Sgn(sngYComp) < 0 Then
        GetAngle = Atn(sngXComp / sngYComp) + PI
    End If
End Function ' GetAngle


' ++++++++++++++++++++++++++++++++++++++++++++++++++++++++++++++++++++++++++++++++++++++++++++++++++++++++++++++++++++++++++++++++++++++++++++++++++++++++++++++++
' END GAME CODE
' ++++++++++++++++++++++++++++++++++++++++++++++++++++++++++++++++++++++++++++++++++++++++++++++++++++++++++++++++++++++++++++++++++++++++++++++++++++++++++++++++

' ++++++++++++++++++++++++++++++++++++++++++++++++++++++++++++++++++++++++++++++++++++++++++++++++++++++++++++++++++++++++++++++++++++++++++++++++++++++++++++++++
' BEGIN TRIG FUNCTIONS
' ++++++++++++++++++++++++++++++++++++++++++++++++++++++++++++++++++++++++++++++++++++++++++++++++++++++++++++++++++++++++++++++++++++++++++++++++++++++++++++++++

' /////////////////////////////////////////////////////////////////////////////
' use angles in degrees units instead of radians (converted inside sub)
' Note this function uses whatever the default type is, better not be some Integer Type.
Function CosD (degrees)
    CosD = Cos(_D2R(degrees))
End Function ' CosD

' /////////////////////////////////////////////////////////////////////////////
' use angles in degrees units instead of radians (converted inside sub)
' Note this function uses whatever the default type is, better not be some Integer Type.
Function SinD (degrees)
    SinD = Sin(_D2R(degrees))
End Function ' SinD

' /////////////////////////////////////////////////////////////////////////////
' use angles in degrees units instead of radians (converted inside sub)
' Note this function uses whatever the default type is, better not be some Integer Type.
Function DAtan2 (x1, y1, x2, y2) ' The angle in degrees a 2nd point (x2, y2)  makes to a first point (x1, y1)
    ' Delta means change between 1 measure and another for example x2 - x1
    deltaX = x2 - x1
    deltaY = y2 - y1
   
    ' To find the angle point(x2, y2) makes to (x1, y1) in Degrees
    ' Take DegreeAngle = DAtan2(y2 - y1, x2 - x1)
    rtn = _R2D(_Atan2(deltaY, deltaX))
    If rtn < 0 Then
        DAtan2 = rtn + 360
    Else
        DAtan2 = rtn
    End If
End Function ' DAtan2

' ++++++++++++++++++++++++++++++++++++++++++++++++++++++++++++++++++++++++++++++++++++++++++++++++++++++++++++++++++++++++++++++++++++++++++++++++++++++++++++++++
' END TRIG FUNCTIONS
' ++++++++++++++++++++++++++++++++++++++++++++++++++++++++++++++++++++++++++++++++++++++++++++++++++++++++++++++++++++++++++++++++++++++++++++++++++++++++++++++++


' ++++++++++++++++++++++++++++++++++++++++++++++++++++++++++++++++++++++++++++++++++++++++++++++++++++++++++++++++++++++++++++++++++++++++++++++++++++++++++++++++
' BEGIN GENERAL PURPOSE FUNCTIONS
' ++++++++++++++++++++++++++++++++++++++++++++++++++++++++++++++++++++++++++++++++++++++++++++++++++++++++++++++++++++++++++++++++++++++++++++++++++++++++++++++++

' /////////////////////////////////////////////////////////////////////////////
' Integer to string

Function cstr$ (myValue)
    'cstr$ = LTRIM$(RTRIM$(STR$(myValue)))
    cstr$ = _Trim$(Str$(myValue))
End Function ' cstr$

' /////////////////////////////////////////////////////////////////////////////
' Hack function, to be replaced with something better

Function DblToInt% (dblOld As Double)
    Dim dblNew As Double
    Dim sValue As String
    Dim iPos As Integer

    dblNew = RoundDouble#(dblOld, 0)
    'sValue = _Trim$(Str$(dblNew))

    sValue = DblToStr$(dblNew)

    'iPos = InStr(1, sValue, ".")
    'If iPos > 0 Then
    '    DblToInt% = Val(Left$(sValue, iPos - 1))
    'Else
    '    DblToInt% = Val(sValue)
    'End If

    DblToInt% = Val(sValue)
End Function ' DblToInt%

' /////////////////////////////////////////////////////////////////////////////
' Scientific notation - QB64 Wiki
' https://www.qb64.org/wiki/Scientific_notation

' Example: A string function that displays extremely small or large exponential decimal values.

Function DblToStr$ (n#)
    Dim result$: result$ = ""
    Dim value$
    Dim Xpos%
    Dim expo%
    Dim sign$
    Dim valu$
    Dim dot%
    Dim L%
    Dim add$
    Dim min$
    Dim DP$
    Dim n%

    value$ = UCase$(LTrim$(Str$(n#)))
    Xpos% = InStr(value$, "D") + InStr(value$, "E") ' only D or E can be present
    If Xpos% Then
        expo% = Val(Mid$(value$, Xpos% + 1))
        If Val(value$) < 0 Then
            sign$ = "-"
            valu$ = Mid$(value$, 2, Xpos% - 2)
        Else
            valu$ = Mid$(value$, 1, Xpos% - 1)
        End If
        dot% = InStr(valu$, ".")
        L% = Len(valu$)
        If expo% > 0 Then
            add$ = String$(expo% - (L% - dot%), "0")
        End If
        If expo% < 0 Then
            min$ = String$(Abs(expo%) - (dot% - 1), "0")
            DP$ = "."
        End If
        For n% = 1 To L%
            If Mid$(valu$, n%, 1) <> "." Then
                num$ = num$ + Mid$(valu$, n%, 1)
            End If
        Next n%
        result$ = _Trim$(sign$ + DP$ + min$ + num$ + add$)
    Else
        result$ = value$
    End If

    DblToStr$ = result$
End Function ' DblToStr$

' /////////////////////////////////////////////////////////////////////////////

Function DblRoundedToStr$ (dblValue As Double, intNumPlaces As Integer)
    Dim dblNew As Double
    dblNew = RoundDouble#(dblValue, intNumPlaces)
    DblRoundedToStr$ = DblToStr$(dblNew)
End Function ' DblRoundedToStr$

' /////////////////////////////////////////////////////////////////////////////

Function DoubleABS# (dblValue As Double)
    If Sgn(dblValue) = -1 Then
        DoubleABS# = 0 - dblValue
    Else
        DoubleABS# = dblValue
    End If
End Function ' DoubleABS#

' /////////////////////////////////////////////////////////////////////////////
' bplus: The Gold Standard is even better than THE QB64 CIRCLE sub in this respect!
' https://forum.qb64.org/index.php?topic=1044.135

' from Steve Gold standard
' Renamed fcirc to DrawCircleSolid

' Not as fast as DrawCircleTopLeft but pretty fast.

' Example:
' Screen _NewImage(800, 600, 32)
' _ScreenMove 250, 60
' For r = 250 To 0 Step -60
'     DrawCircleSolid 400, 300, r, _RGBA(255, 255, 255, 100)
' Next r

Sub DrawCircleSolid (CX As Integer, CY As Integer, R As Integer, C As _Unsigned Long)
    Dim Radius As Integer, RadiusError As Integer
    Dim X As Integer, Y As Integer

    Radius = Abs(R)
    RadiusError = -Radius
    X = Radius
    Y = 0

    If Radius = 0 Then PSet (CX, CY), C: Exit Sub

    ' Draw the middle span here so we don't draw it twice in the main loop,
    ' which would be a problem with blending turned on.
    Line (CX - X, CY)-(CX + X, CY), C, BF

    While X > Y
        RadiusError = RadiusError + Y * 2 + 1
        If RadiusError >= 0 Then
            If X <> Y + 1 Then
                Line (CX - Y, CY - X)-(CX + Y, CY - X), C, BF
                Line (CX - Y, CY + X)-(CX + Y, CY + X), C, BF
            End If
            X = X - 1
            RadiusError = RadiusError - X * 2
        End If
        Y = Y + 1
        Line (CX - X, CY - Y)-(CX + X, CY - Y), C, BF
        Line (CX - X, CY + Y)-(CX + X, CY + Y), C, BF
    Wend
End Sub ' DrawCircleSolid

' /////////////////////////////////////////////////////////////////////////////

Function FloatRoundedToStr$ (fValue As _Float, intNumPlaces As Integer)
    Dim fNew As _Float
    fNew = Round##(fValue, intNumPlaces)
    FloatRoundedToStr$ = FloatToStr$(fNew)
End Function ' DblRoundedToStr$

' /////////////////////////////////////////////////////////////////////////////
' Scientific notation - QB64 Wiki
' https://www.qb64.org/wiki/Scientific_notation

' Example: A string function that displays extremely small or large exponential decimal values.

Function FloatToStr$ (n##)
    value$ = UCase$(LTrim$(Str$(n##)))
    Xpos% = InStr(value$, "D") + InStr(value$, "E") 'only D or E can be present
    If Xpos% Then
        expo% = Val(Mid$(value$, Xpos% + 1))
        If Val(value$) < 0 Then
            sign$ = "-"
            valu$ = Mid$(value$, 2, Xpos% - 2)
        Else
            valu$ = Mid$(value$, 1, Xpos% - 1)
        End If
        dot% = InStr(valu$, ".")
        L% = Len(valu$)
        If expo% > 0 Then
            add$ = String$(expo% - (L% - dot%), "0")
        End If
        If expo% < 0 Then
            min$ = String$(Abs(expo%) - (dot% - 1), "0")
            DP$ = "."
        End If
        For n = 1 To L%
            If Mid$(valu$, n, 1) <> "." Then
                num$ = num$ + Mid$(valu$, n, 1)
            End If
        Next n
    Else
        FloatToStr$ = value$
        Exit Function
    End If
    FloatToStr$ = _Trim$(sign$ + DP$ + min$ + num$ + add$)
End Function ' FloatToStr$

' /////////////////////////////////////////////////////////////////////////////
' By sMcNeill from https://www.qb64.org/forum/index.php?topic=896.0

Function IsNum% (text$)
    Dim a$
    Dim b$
    a$ = _Trim$(text$)
    b$ = _Trim$(Str$(Val(text$)))
    If a$ = b$ Then
        IsNum% = TRUE
    Else
        IsNum% = FALSE
    End If
End Function ' IsNum%

' /////////////////////////////////////////////////////////////////////////////
' Split and join strings
' https://www.qb64.org/forum/index.php?topic=1073.0

'Combine all elements of in$() into a single string with delimiter$ separating the elements.

Function join$ (in$(), delimiter$)
    Dim result$
    Dim i As Long
    result$ = in$(LBound(in$))
    For i = LBound(in$) + 1 To UBound(in$)
        result$ = result$ + delimiter$ + in$(i)
    Next i
    join$ = result$
End Function ' join$

' /////////////////////////////////////////////////////////////////////////////

Function LeftPadString$ (myString$, toWidth%, padChar$)
    LeftPadString$ = Right$(String$(toWidth%, padChar$) + myString$, toWidth%)
End Function ' LeftPadString$

' /////////////////////////////////////////////////////////////////////////////
' ABS was returning strange values with type LONG
' so I created this which does not.

Function LongABS& (lngValue As Long)
    If Sgn(lngValue) = -1 Then
        LongABS& = 0 - lngValue
    Else
        LongABS& = lngValue
    End If
End Function ' LongABS&

' /////////////////////////////////////////////////////////////////////////////
' iRow% and iCol% are 0-based in this version

Sub PrintAt (iRow%, iCol%, sText$)
    '_PrintString (iCol% * 8, iRow% * 16), sText$
    _PrintString (iCol% * 8, iRow% * 16), sText$
    '_PrintString (iCol%, iRow%), sText$
End Sub ' PrintAt

' /////////////////////////////////////////////////////////////////////////////
' Generate random value between Min and Max.

Function RandomNumber% (Min%, Max%)
    Dim NumSpread%

    ' SET RANDOM SEED
    'Randomize ' Initialize random-number generator.
    Randomize Timer

    ' GET RANDOM # Min%-Max%
    'RandomNumber = Int((Max * Rnd) + Min) ' generate number

    NumSpread% = (Max% - Min%) + 1

    RandomNumber% = Int(Rnd * NumSpread%) + Min% ' GET RANDOM # BETWEEN Max% AND Min%

End Function ' RandomNumber%

' /////////////////////////////////////////////////////////////////////////////

Function RightPadString$ (myString$, toWidth%, padChar$)
    RightPadString$ = Left$(myString$ + String$(toWidth%, padChar$), toWidth%)
End Function ' RightPadString$

' /////////////////////////////////////////////////////////////////////////////
' https://www.qb64.org/forum/index.php?topic=3605.0
' Quote from: SMcNeill on Today at 03:53:48 PM
'
' Sometimes, you guys make things entirely too  complicated.
' There ya go!  Three functions to either round naturally,
' always round down, or always round up, to whatever number of digits you desire.
' EDIT:  Modified to add another option to round scientific,
' since you had it's description included in your example.

' Receives + returns _FLOAT myVar## (-1.18E-4932 to +1.18E+4932)

' =============================================================================
' ROUNDING FUNCTIONS FOR TYPE _FLOAT

Function Round## (num##, digits%)
    Round## = Int(num## * 10 ^ digits% + .5) / 10 ^ digits%
End Function

Function RoundUp## (num##, digits%)
    RoundUp## = _Ceil(num## * 10 ^ digits%) / 10 ^ digits%
End Function

Function RoundDown## (num##, digits%)
    RoundDown## = Int(num## * 10 ^ digits%) / 10 ^ digits%
End Function

Function RoundScientific## (num##, digits%)
    RoundScientific## = _Round(num## * 10 ^ digits%) / 10 ^ digits%
End Function

' =============================================================================
' ROUNDING FUNCTIONS FOR TYPE DOUBLE

Function RoundDouble# (num#, digits%)
    RoundDouble# = Int(num# * 10 ^ digits% + .5) / 10 ^ digits%
End Function

Function RoundUpDouble# (num#, digits%)
    RoundUpDouble# = _Ceil(num# * 10 ^ digits%) / 10 ^ digits%
End Function

Function RoundDownDouble# (num#, digits%)
    RoundDownDouble# = Int(num# * 10 ^ digits%) / 10 ^ digits%
End Function

Function RoundScientificDouble# (num#, digits%)
    RoundScientificDouble# = _Round(num# * 10 ^ digits%) / 10 ^ digits%
End Function

' =============================================================================
' ROUNDING FUNCTIONS FOR TYPE SINGLE

Function RoundSingle! (num!, digits%)
    RoundSingle! = Int(num! * 10 ^ digits% + .5) / 10 ^ digits%
End Function

' NOTE: not sure this one works: when digits%=3, it rounds .31 to .32
Function RoundUpSingle! (num!, digits%)
    RoundUpSingle! = _Ceil(num! * 10 ^ digits%) / 10 ^ digits%
End Function

Function RoundDownSingle! (num!, digits%)
    RoundDownSingle! = Int(num! * 10 ^ digits%) / 10 ^ digits%
End Function

Function RoundScientificSingle! (num!, digits%)
    RoundScientificSingle! = _Round(num! * 10 ^ digits%) / 10 ^ digits%
End Function

' /////////////////////////////////////////////////////////////////////////////

Function SmallestOf3% (i1%, i2%, i3%)
    Dim iMin%
    iMin% = i1%
    If i2% < iMin% Then iMin% = i2%
    If i3% < iMin% Then iMin% = i3%
    SmallestOf3% = iMin%
End Function ' SmallestOf3

' /////////////////////////////////////////////////////////////////////////////

Function SngRoundedToStr$ (sngValue As Single, intNumPlaces As Integer)
    Dim sngNew As Single
    sngNew = RoundSingle!(sngValue, intNumPlaces)
    SngRoundedToStr$ = SngToStr$(sngNew)
End Function ' SngRoundedToStr$

' /////////////////////////////////////////////////////////////////////////////
' Hack function, to be replaced with something better

Function SngToInt% (sngOld As Single)
    Dim sngNew As Single
    Dim sValue As String
    Dim iPos As Integer

    sngNew = RoundSingle!(sngOld, 0)
    'sValue = _Trim$(Str$(sngNew))

    sValue = SngToStr$(sngNew)

    'iPos = InStr(1, sValue, ".")
    'If iPos > 0 Then
    '    SngToInt% = Val(Left$(sValue, iPos - 1))
    'Else
    '    SngToInt% = Val(sValue)
    'End If

    SngToInt% = Val(sValue)
End Function ' SngToInt%

' /////////////////////////////////////////////////////////////////////////////
' Scientific notation - QB64 Wiki
' https://www.qb64.org/wiki/Scientific_notation

' Example: A string function that displays extremely small or large exponential decimal values.

Function SngToStr$ (n!)
    Dim result$: result$ = ""
    Dim value$
    Dim Xpos%
    Dim expo%
    Dim sign$
    Dim valu$
    Dim dot%
    Dim L%
    Dim add$
    Dim min$
    Dim DP$
    Dim n%

    value$ = UCase$(LTrim$(Str$(n!)))
    Xpos% = InStr(value$, "D") + InStr(value$, "E") ' only D or E can be present
    If Xpos% Then
        expo% = Val(Mid$(value$, Xpos% + 1))
        If Val(value$) < 0 Then
            sign$ = "-"
            valu$ = Mid$(value$, 2, Xpos% - 2)
        Else
            valu$ = Mid$(value$, 1, Xpos% - 1)
        End If
        dot% = InStr(valu$, ".")
        L% = Len(valu$)
        If expo% > 0 Then
            add$ = String$(expo% - (L% - dot%), "0")
        End If
        If expo% < 0 Then
            min$ = String$(Abs(expo%) - (dot% - 1), "0")
            DP$ = "."
        End If
        For n% = 1 To L%
            If Mid$(valu$, n%, 1) <> "." Then
                num$ = num$ + Mid$(valu$, n%, 1)
            End If
        Next n%
        result$ = _Trim$(sign$ + DP$ + min$ + num$ + add$)
    Else
        result$ = value$
    End If

    SngToStr$ = result$
End Function ' SngToStr$

' /////////////////////////////////////////////////////////////////////////////
' Split and join strings
' https://www.qb64.org/forum/index.php?topic=1073.0
'
' FROM luke, QB64 Developer
' Date: February 15, 2019, 04:11:07 AM
'
' Given a string of words separated by spaces (or any other character),
' splits it into an array of the words. I've no doubt many people have
' written a version of this over the years and no doubt there's a million
' ways to do it, but I thought I'd put mine here so we have at least one
' version. There's also a join function that does the opposite
' array -> single string.
'
' Code is hopefully reasonably self explanatory with comments and a little demo.
' Note, this is akin to Python/JavaScript split/join, PHP explode/implode.

'Split in$ into pieces, chopping at every occurrence of delimiter$. Multiple consecutive occurrences
'of delimiter$ are treated as a single instance. The chopped pieces are stored in result$().
'
'delimiter$ must be one character long.
'result$() must have been REDIMmed previously.

' Modified to handle multi-character delimiters

Sub split (in$, delimiter$, result$())
    Dim start As Integer
    Dim finish As Integer
    Dim iDelimLen As Integer
    ReDim result$(-1)

    iDelimLen = Len(delimiter$)

    start = 1
    Do
        'While Mid$(in$, start, 1) = delimiter$
        While Mid$(in$, start, iDelimLen) = delimiter$
            'start = start + 1
            start = start + iDelimLen
            If start > Len(in$) Then
                Exit Sub
            End If
        Wend
        finish = InStr(start, in$, delimiter$)
        If finish = 0 Then
            finish = Len(in$) + 1
        End If

        ReDim _Preserve result$(0 To UBound(result$) + 1)

        result$(UBound(result$)) = Mid$(in$, start, finish - start)
        start = finish + 1
    Loop While start <= Len(in$)
End Sub ' split

' ++++++++++++++++++++++++++++++++++++++++++++++++++++++++++++++++++++++++++++++++++++++++++++++++++++++++++++++++++++++++++++++++++++++++++++++++++++++++++++++++
' END GENERAL PURPOSE FUNCTIONS
' ++++++++++++++++++++++++++++++++++++++++++++++++++++++++++++++++++++++++++++++++++++++++++++++++++++++++++++++++++++++++++++++++++++++++++++++++++++++++++++++++

' ++++++++++++++++++++++++++++++++++++++++++++++++++++++++++++++++++++++++++++++++++++++++++++++++++++++++++++++++++++++++++++++++++++++++++++++++++++++++++++++++
' BEGIN COLOR FUNCTIONS
' ++++++++++++++++++++++++++++++++++++++++++++++++++++++++++++++++++++++++++++++++++++++++++++++++++++++++++++++++++++++++++++++++++++++++++++++++++++++++++++++++

Function cRed~& ()
    cRed = _RGB32(255, 0, 0)
End Function

Function cOrangeRed~& ()
    cOrangeRed = _RGB32(255, 69, 0)
End Function ' cOrangeRed~&

Function cDarkOrange~& ()
    cDarkOrange = _RGB32(255, 140, 0)
End Function ' cDarkOrange~&

Function cOrange~& ()
    cOrange = _RGB32(255, 165, 0)
End Function ' cOrange~&

Function cGold~& ()
    cGold = _RGB32(255, 215, 0)
End Function ' cGold~&

Function cYellow~& ()
    cYellow = _RGB32(255, 255, 0)
End Function ' cYellow~&

' LONG-HAIRED FRIENDS OF JESUS OR NOT,
' THIS IS NOT YELLOW ENOUGH (TOO CLOSE TO LIME)
' TO USE FOR OUR COMPLEX RAINBOW SEQUENCE:
Function cChartreuse~& ()
    cChartreuse = _RGB32(127, 255, 0)
End Function ' cChartreuse~&

' WE SUBSTITUTE THIS CSS3 COLOR FOR INBETWEEN LIME AND YELLOW:
Function cOliveDrab1~& ()
    cOliveDrab1 = _RGB32(192, 255, 62)
End Function ' cOliveDrab1~&

Function cLime~& ()
    cLime = _RGB32(0, 255, 0)
End Function ' cLime~&

Function cMediumSpringGreen~& ()
    cMediumSpringGreen = _RGB32(0, 250, 154)
End Function ' cMediumSpringGreen~&

' ADDED THIS FOR THE GAUGE COLOR:
Function cSpringGreen~& ()
    cSpringGreen = _RGB32(0, 255, 160)
End Function ' cSpringGreen~&

Function cCyan~& ()
    cCyan = _RGB32(0, 255, 255)
End Function ' cCyan~&

Function cDeepSkyBlue~& ()
    cDeepSkyBlue = _RGB32(0, 191, 255)
End Function ' cDeepSkyBlue~&

Function cDodgerBlue~& ()
    cDodgerBlue = _RGB32(30, 144, 255)
End Function ' cDodgerBlue~&

Function cSeaBlue~& ()
    cSeaBlue = _RGB32(0, 64, 255)
End Function ' cSeaBlue~&

Function cBlue~& ()
    cBlue = _RGB32(0, 0, 255)
End Function ' cBlue~&

Function cBluePurple~& ()
    cBluePurple = _RGB32(64, 0, 255)
End Function ' cBluePurple~&

Function cDeepPurple~& ()
    cDeepPurple = _RGB32(96, 0, 255)
End Function ' cDeepPurple~&

Function cPurple~& ()
    cPurple = _RGB32(128, 0, 255)
End Function ' cPurple~&

Function cPurpleRed~& ()
    cPurpleRed = _RGB32(128, 0, 192)
End Function ' cPurpleRed~&

Function cDarkRed~& ()
    cDarkRed = _RGB32(160, 0, 64)
End Function ' cDarkRed~&

Function cBrickRed~& ()
    cBrickRed = _RGB32(192, 0, 32)
End Function ' cBrickRed~&

Function cDarkGreen~& ()
    cDarkGreen = _RGB32(0, 100, 0)
End Function ' cDarkGreen~&

Function cGreen~& ()
    cGreen = _RGB32(0, 128, 0)
End Function ' cGreen~&

Function cOliveDrab~& ()
    cOliveDrab = _RGB32(107, 142, 35)
End Function ' cOliveDrab~&

Function cLightPink~& ()
    cLightPink = _RGB32(255, 182, 193)
End Function ' cLightPink~&

Function cHotPink~& ()
    cHotPink = _RGB32(255, 105, 180)
End Function ' cHotPink~&

Function cDeepPink~& ()
    cDeepPink = _RGB32(255, 20, 147)
End Function ' cDeepPink~&

Function cMagenta~& ()
    cMagenta = _RGB32(255, 0, 255)
End Function ' cMagenta~&

Function cBlack~& ()
    cBlack = _RGB32(0, 0, 0)
End Function ' cBlack~&

Function cDimGray~& ()
    cDimGray = _RGB32(105, 105, 105)
End Function ' cDimGray~&

Function cGray~& ()
    cGray = _RGB32(128, 128, 128)
End Function ' cGray~&

Function cDarkGray~& ()
    cDarkGray = _RGB32(169, 169, 169)
End Function ' cDarkGray~&

Function cSilver~& ()
    cSilver = _RGB32(192, 192, 192)
End Function ' cSilver~&

Function cLightGray~& ()
    cLightGray = _RGB32(211, 211, 211)
End Function ' cLightGray~&

Function cGainsboro~& ()
    cGainsboro = _RGB32(220, 220, 220)
End Function ' cGainsboro~&

Function cWhiteSmoke~& ()
    cWhiteSmoke = _RGB32(245, 245, 245)
End Function ' cWhiteSmoke~&

Function cWhite~& ()
    cWhite = _RGB32(255, 255, 255)
    'cWhite = _RGB32(254, 254, 254)
End Function ' cWhite~&

Function cDarkBrown~& ()
    cDarkBrown = _RGB32(128, 64, 0)
End Function ' cDarkBrown~&

Function cLightBrown~& ()
    cLightBrown = _RGB32(196, 96, 0)
End Function ' cLightBrown~&

Function cKhaki~& ()
    cKhaki = _RGB32(240, 230, 140)
End Function ' cKhaki~&

Function cEmpty~& ()
    'cEmpty~& = -1
    cEmpty = _RGB32(0, 0, 0, 0)
End Function ' cEmpty~&

' ++++++++++++++++++++++++++++++++++++++++++++++++++++++++++++++++++++++++++++++++++++++++++++++++++++++++++++++++++++++++++++++++++++++++++++++++++++++++++++++++
' END COLOR FUNCTIONS
' ++++++++++++++++++++++++++++++++++++++++++++++++++++++++++++++++++++++++++++++++++++++++++++++++++++++++++++++++++++++++++++++++++++++++++++++++++++++++++++++++

' ################################################################################################################################################################
' BEGIN KEYBOARD CODE FUNCTIONS
' NOTE: ALL CODES ARE FOR _BUTTON, EXCEPT:
' cF10 (_KEYDOWN)
' cAltLeft (_KEYHIT)
' cAltRight (_KEYHIT)
' cPrintScreen (_KEYHIT) <- may slow down pc?
' cPauseBreak (_KEYHIT) <- may not work?
' ################################################################################################################################################################

Function KeyCode_Escape% ()
    KeyCode_Escape% = 2
End Function

Function KeyCode_F1% ()
    KeyCode_F1% = 60
End Function

Function KeyCode_F2% ()
    KeyCode_F2% = 61
End Function

Function KeyCode_F3% ()
    KeyCode_F3% = 62
End Function

Function KeyCode_F4% ()
    KeyCode_F4% = 63
End Function

Function KeyCode_F5% ()
    KeyCode_F5% = 64
End Function

Function KeyCode_F6% ()
    KeyCode_F6% = 65
End Function

Function KeyCode_F7% ()
    KeyCode_F7% = 66
End Function

Function KeyCode_F8% ()
    KeyCode_F8% = 67
End Function

Function KeyCode_F9% ()
    KeyCode_F9% = 68
End Function

'_KEYDOWN CODE, NOT _BUTTON CODE
Function KeyCode_F10% ()
    KeyCode_F10% = 17408
End Function

Function KeyCode_F11% ()
    KeyCode_F11% = 88
End Function

Function KeyCode_F12% ()
    KeyCode_F12% = 89
End Function

'_KEYHIT CODE, NOT _BUTTON CODE
Function KeyCode_PrintScreen% ()
    KeyCode_PrintScreen% = -44
End Function

Function KeyCode_ScrollLock% ()
    KeyCode_ScrollLock% = 71
End Function

'_KEYHIT CODE, NOT _BUTTON CODE
Function KeyCode_PauseBreak% ()
    KeyCode_PauseBreak% = 31053
End Function

Function KeyCode_Tilde% ()
    KeyCode_Tilde% = 42
End Function

Function KeyCode_1% ()
    KeyCode_1% = 3
End Function

Function KeyCode_2% ()
    KeyCode_2% = 4
End Function

Function KeyCode_3% ()
    KeyCode_3% = 5
End Function

Function KeyCode_4% ()
    KeyCode_4% = 6
End Function

Function KeyCode_5% ()
    KeyCode_5% = 7
End Function

Function KeyCode_6% ()
    KeyCode_6% = 8
End Function

Function KeyCode_7% ()
    KeyCode_7% = 9
End Function

Function KeyCode_8% ()
    KeyCode_8% = 10
End Function

Function KeyCode_9% ()
    KeyCode_9% = 11
End Function

Function KeyCode_0% ()
    KeyCode_0% = 12
End Function

Function KeyCode_Minus% ()
    KeyCode_Minus% = 13
End Function

Function KeyCode_Equal% ()
    KeyCode_Equal% = 14
End Function

Function KeyCode_BkSp% ()
    KeyCode_BkSp% = 15
End Function

Function KeyCode_Ins% ()
    KeyCode_Ins% = 339
End Function

Function KeyCode_Home% ()
    KeyCode_Home% = 328
End Function

Function KeyCode_PgUp% ()
    KeyCode_PgUp% = 330
End Function

Function KeyCode_Del% ()
    KeyCode_Del% = 340
End Function

Function KeyCode_End% ()
    KeyCode_End% = 336
End Function

Function KeyCode_PgDn% ()
    KeyCode_PgDn% = 338
End Function

Function KeyCode_NumLock% ()
    KeyCode_NumLock% = 326
End Function

Function KeyCode_KeypadSlash% ()
    KeyCode_KeypadSlash% = 310
End Function

Function KeyCode_KeypadMultiply% ()
    KeyCode_KeypadMultiply% = 56
End Function

Function KeyCode_KeypadMinus% ()
    KeyCode_KeypadMinus% = 75
End Function

Function KeyCode_Keypad7Home% ()
    KeyCode_Keypad7Home% = 72
End Function

Function KeyCode_Keypad8Up% ()
    KeyCode_Keypad8Up% = 73
End Function

Function KeyCode_Keypad9PgUp% ()
    KeyCode_Keypad9PgUp% = 74
End Function

Function KeyCode_KeypadPlus% ()
    KeyCode_KeypadPlus% = 79
End Function

Function KeyCode_Keypad4Left% ()
    KeyCode_Keypad4Left% = 76
End Function

Function KeyCode_Keypad5% ()
    KeyCode_Keypad5% = 77
End Function

Function KeyCode_Keypad6Right% ()
    KeyCode_Keypad6Right% = 78
End Function

Function KeyCode_Keypad1End% ()
    KeyCode_Keypad1End% = 80
End Function

Function KeyCode_Keypad2Down% ()
    KeyCode_Keypad2Down% = 81
End Function

Function KeyCode_Keypad3PgDn% ()
    KeyCode_Keypad3PgDn% = 82
End Function

Function KeyCode_KeypadEnter% ()
    KeyCode_KeypadEnter% = 285
End Function

Function KeyCode_Keypad0Ins% ()
    KeyCode_Keypad0Ins% = 83
End Function

Function KeyCode_KeypadPeriodDel% ()
    KeyCode_KeypadPeriodDel% = 84
End Function

Function KeyCode_Tab% ()
    KeyCode_Tab% = 16
End Function

Function KeyCode_Q% ()
    KeyCode_Q% = 17
End Function

Function KeyCode_W% ()
    KeyCode_W% = 18
End Function

Function KeyCode_E% ()
    KeyCode_E% = 19
End Function

Function KeyCode_R% ()
    KeyCode_R% = 20
End Function

Function KeyCode_T% ()
    KeyCode_T% = 21
End Function

Function KeyCode_Y% ()
    KeyCode_Y% = 22
End Function

Function KeyCode_U% ()
    KeyCode_U% = 23
End Function

Function KeyCode_I% ()
    KeyCode_I% = 24
End Function

Function KeyCode_O% ()
    KeyCode_O% = 25
End Function

Function KeyCode_P% ()
    KeyCode_P% = 26
End Function

Function KeyCode_BracketLeft% ()
    KeyCode_BracketLeft% = 27
End Function

Function KeyCode_BracketRight% ()
    KeyCode_BracketRight% = 28
End Function

Function KeyCode_Backslash% ()
    KeyCode_Backslash% = 44
End Function

Function KeyCode_CapsLock% ()
    KeyCode_CapsLock% = 59
End Function

Function KeyCode_A% ()
    KeyCode_A% = 31
End Function

Function KeyCode_S% ()
    KeyCode_S% = 32
End Function

Function KeyCode_D% ()
    KeyCode_D% = 33
End Function

Function KeyCode_F% ()
    KeyCode_F% = 34
End Function

Function KeyCode_G% ()
    KeyCode_G% = 35
End Function

Function KeyCode_H% ()
    KeyCode_H% = 36
End Function

Function KeyCode_J% ()
    KeyCode_J% = 37
End Function

Function KeyCode_K% ()
    KeyCode_K% = 38
End Function

Function KeyCode_L% ()
    KeyCode_L% = 39
End Function

Function KeyCode_Semicolon% ()
    KeyCode_Semicolon% = 40
End Function

Function KeyCode_Apostrophe% ()
    KeyCode_Apostrophe% = 41
End Function

Function KeyCode_Enter% ()
    KeyCode_Enter% = 29
End Function

Function KeyCode_ShiftLeft% ()
    KeyCode_ShiftLeft% = 43
End Function

Function KeyCode_Z% ()
    KeyCode_Z% = 45
End Function

Function KeyCode_X% ()
    KeyCode_X% = 46
End Function

Function KeyCode_C% ()
    KeyCode_C% = 47
End Function

Function KeyCode_V% ()
    KeyCode_V% = 48
End Function

Function KeyCode_B% ()
    KeyCode_B% = 49
End Function

Function KeyCode_N% ()
    KeyCode_N% = 50
End Function

Function KeyCode_M% ()
    KeyCode_M% = 51
End Function

Function KeyCode_Comma% ()
    KeyCode_Comma% = 52
End Function

Function KeyCode_Period% ()
    KeyCode_Period% = 53
End Function

Function KeyCode_Slash% ()
    KeyCode_Slash% = 54
End Function

Function KeyCode_ShiftRight% ()
    KeyCode_ShiftRight% = 55
End Function

Function KeyCode_Up% ()
    KeyCode_Up% = 329
End Function

Function KeyCode_Left% ()
    KeyCode_Left% = 332
End Function

Function KeyCode_Down% ()
    KeyCode_Down% = 337
End Function

Function KeyCode_Right% ()
    KeyCode_Right% = 334
End Function

Function KeyCode_CtrlLeft% ()
    KeyCode_CtrlLeft% = 30
End Function

Function KeyCode_WinLeft% ()
    KeyCode_WinLeft% = 348
End Function

' _KEYHIT CODE NOT _BUTTON CODE
Function KeyCode_AltLeft% ()
    KeyCode_AltLeft% = -30764
End Function

Function KeyCode_Spacebar% ()
    KeyCode_Spacebar% = 58
End Function

' _KEYHIT CODE NOT _BUTTON CODE
Function KeyCode_AltRight% ()
    KeyCode_AltRight% = -30765
End Function

Function KeyCode_WinRight% ()
    KeyCode_WinRight% = 349
End Function

Function KeyCode_Menu% ()
    KeyCode_Menu% = 350
End Function

Function KeyCode_CtrlRight% ()
    KeyCode_CtrlRight% = 286
End Function

' ################################################################################################################################################################
' END KEYBOARD CODE FUNCTIONS
' ################################################################################################################################################################

'' ++++++++++++++++++++++++++++++++++++++++++++++++++++++++++++++++++++++++++++++++++++++++++++++++++++++++++++++++++++++++++++++++++++++++++++++++++++++++++++++++
'' BEGIN DEBUGGING ROUTINES #DEBUGGING
'' ++++++++++++++++++++++++++++++++++++++++++++++++++++++++++++++++++++++++++++++++++++++++++++++++++++++++++++++++++++++++++++++++++++++++++++++++++++++++++++++++
'
'Sub DebugPrint (MyString As String)
'    If m_bDebug = TRUE Then
'        '_Echo MyString
'
'        ReDim arrLines(-1) As String
'        Dim iLoop As Integer
'        split MyString, Chr$(13), arrLines()
'        For iLoop = LBound(arrLines) To UBound(arrLines)
'            _Echo arrLines(iLoop)
'        Next iLoop
'    End If
'End Sub ' DebugPrint
'
'' ++++++++++++++++++++++++++++++++++++++++++++++++++++++++++++++++++++++++++++++++++++++++++++++++++++++++++++++++++++++++++++++++++++++++++++++++++++++++++++++++
'' END DEBUGGING ROUTINES @DEBUGGING
'' ++++++++++++++++++++++++++++++++++++++++++++++++++++++++++++++++++++++++++++++++++++++++++++++++++++++++++++++++++++++++++++++++++++++++++++++++++++++++++++++++

' ################################################################################################################################################################
' #REFERENCE

' =============================================================================
' SOME USEFUL STUFF FOR REFERENCE:

' Type Name               Type suffix symbol   Minimum value                  Maximum value                Size in Bytes
' ---------------------   ------------------   ----------------------------   --------------------------   -------------
' _BIT                    `                    -1                             0                            1/8
' _BIT * n                `n                   -128                           127                          n/8
' _UNSIGNED _BIT          ~`                   0                              1                            1/8
' _BYTE                   %%                   -128                           127                          1
' _UNSIGNED _BYTE         ~%%                  0                              255                          1
' INTEGER                 %                    -32,768                        32,767                       2
' _UNSIGNED INTEGER       ~%                   0                              65,535                       2
' LONG                    &                    -2,147,483,648                 2,147,483,647                4
' _UNSIGNED LONG          ~&                   0                              4,294,967,295                4
' _INTEGER64              &&                   -9,223,372,036,854,775,808     9,223,372,036,854,775,807    8
' _UNSIGNED _INTEGER64    ~&&                  0                              18,446,744,073,709,551,615   8
' SINGLE                  ! or none            -2.802597E-45                  +3.402823E+38                4
' DOUBLE                  #                    -4.490656458412465E-324        +1.797693134862310E+308      8
' _FLOAT                  ##                   -1.18E-4932                    +1.18E+4932                  32(10 used)
' _OFFSET                 %&                   -9,223,372,036,854,775,808     9,223,372,036,854,775,807    Use LEN
' _UNSIGNED _OFFSET       ~%&                  0                              18,446,744,073,709,551,615   Use LEN
' _MEM                    none                 combined memory variable type  N/A                          Use LEN

' div: int1% = num1% \ den1%
' mod: rem1% = num1% MOD den1%

'#END
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