Air Hockey - Dark Theme - Printable Version

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Option _Explicit

'Air Hockey v2-1.bas for QB64

' Started in QB64 Walter fork version (B+=MGA) 2017-09-05

' The first version was a direct translation from SmallBASIC,

' Now v2.0 add some more graphic image handling, try new things.

' 2020-03-11 v2-1 (QB64 v1.4 now) cleanup some code:

' Fix _MOUSEINPUT block too newbie ;)

' Fix flat spots on strikers how long have they been there?

' Increase frames per sec and slow puck speed for less double images.

' Oh that sped up the AI player! Nice.

' Do start shots to the side instead of directly at goal. MUCH BETTER!

' Update opening screen with this info. Now pause the puck at start.

' Ran OPTION _EXPLICIT and found a type-O that has been 0 all this time!



' v2020-03-23 Dark Theme as suggested by Danlin also fix fill circle with color

' also lighten color around the puck, oh fix the rest of the _rgb to rgb32.



Randomize Timer

Const xmax = 1200, ymax = 700 'screen dimensions

Screen _NewImage(xmax, ymax, 32)

_Title "Air Hockey v2020-03-23 Dark Theme"

_Delay .25

_ScreenMove _Middle



Const pr = 16 '              puck radius

Const pr2 = 2 * pr '         puck diameter = bumper width = radius of strikers

Const tl = xmax '            table length

Const tw = tl / 2 '          table width

Const tw13 = .3333 * tw \ 1 'goal end point

Const tw23 = .6667 * tw \ 1 'goal end point

Const speed = 15 '           puck speed also see _limit in main loop

Const midC = 316 '           (tl - 2 * pr2) \ 4 + pr2   'mid line of computer's sin field

Const rangeC = 252 '         316 - 252 = 64 (bumper + pr2)  316 + 252 = 568 (mid screen - pr2)



Common Shared f&, table&, computer, player, s$, tx, px, py, pa, psx, psy, c1, csx, csy, strkr&



f& = _LoadFont("C:\Windows\Fonts\arial.ttf", 25) ' arial normal style  if you have windows

_Font f& '                                         arial is pretty common if you don't have Windows



table& = _NewImage(xmax, tw, 32)

_Dest table&

drawTable



strkr& = _NewImage(2 * pr2 + 1, 2 * pr2 + 1, 32) ' more space to avoid right and bottom flat edges

_Dest strkr&

striker pr2, pr2



_Dest 0 '                                                    Opening screen

cp 7, "Air Hockey, first to score 21 goals wins!"

cp 9, "Player you will be defending the goal on the right (a black slot)."

cp 10, "Your goal is on the left, defended by the computer."

cp 12, "The puck will be started going up and down in the middle of"

cp 13, "the screen at slight angle towards a randomly selected goal."

cp 16, "Press any when ready..."

Sleep

_Delay 1

_MouseHide

Cls

updateScore

_PutImage (0, 0), table&, 0

drawComputerStriker

While _MouseInput: Wend

psx = _MouseX: psy = _MouseY

drawPlayerStriker

initball

While player < 21 And computer < 21 '        play until someone scores 21

    Cls

    updateScore

    _PutImage (0, 0), table&, 0

    drawComputerStriker

    While _MouseInput: Wend

    psx = _MouseX: psy = _MouseY

    drawPlayerStriker

    drawPuck

    _Display

    _Limit 60 '<<<<<<<<<<<<<  slow down, speeed up as needed for good game

Wend

If computer > player Then '                                    last report

    s$ = "Game Won by Computer."

    tx = 450

Else

    s$ = "Game Won by Player!"

    tx = 470

End If

Color _RGB32(200, 240, 140)

_PrintString (tx, tw + 30), s$

_Display

_Delay 3



Sub initball 'toss puck out to side slightly angled to one goal or the other

    Dim pao

    px = tl / 2: py = tw / 2: pao = _Pi(1 / 10) * Rnd

    puck px, py

    _Display

    _Delay .3

    If Rnd < .5 Then pa = _Pi(.5) Else pa = _Pi(1.5)

    If Rnd < .5 Then pa = pa + pao Else pa = pa - pao

End Sub



Sub updateScore

    Color _RGB32(40, 255, 255)

    s$ = "Computer: " + Str$(computer) + Space$(67) + "Player: " + Str$(player)

    _PrintString (200, tw + 30), s$

End Sub



Sub drawTable

    Dim i, shade

    For i = 0 To pr2 Step 4

        shade = 64 + i / pr2 * 100

        Color _RGB32(shade, shade, shade)

        Line (i, i)-(tl - i, tw - i), , BF

    Next

    Line (pr2, pr2)-(tl - pr2, tw - pr2), _RGB32(190, 230, 255), BF 'field

    Line (pr2, pr2)-(tl - pr2, tw - pr2), _RGB32(50, 0, 50), BF 'field

    Line (pr, tw13)-(pr2, tw23), _RGB32(60, 60, 60), BF

    Line (tl - pr2, tw13)-(tl - pr, tw23), _RGB32(60, 60, 60), BF

    Line (tl \ 2 - 1, pr2)-(tl \ 2 + 1, tw - pr2), _RGB32(128, 128, 128), BF

End Sub



Sub drawPlayerStriker

    If psx - pr2 < tl / 2 Then psx = tl / 2 + pr2

    If psx + pr2 > tl - pr2 Then psx = tl - 2 * pr2

    If psy - pr2 < pr2 Then psy = 2 * pr2

    If psy + pr2 > tw - pr2 Then psy = tw - 2 * pr2

    _PutImage (psx - pr2, psy - pr2), strkr&, 0

End Sub



Sub drawComputerStriker

    c1 = c1 + _Pi(1 / 80)

    csx = midC + rangeC * Sin(c1)

    If px > csx Then csy = py + pr2 * 1.5 * Sin(c1)

    If csy - pr2 < pr2 Then csy = 2 * pr2

    If csy + pr2 > tw - pr2 Then csy = tw - 2 * pr2

    _PutImage (csx - pr2, csy - pr2), strkr&, 0

End Sub



Sub drawPuck

    'update ball x, y and see if hit anything

    Dim i, shade

    px = px + speed * Cos(pa)

    py = py + speed * Sin(pa)



    If px - pr < pr2 Then

        If tw13 < py - pr And py + pr < tw23 Then 'through computer slot, player scores

            player = player + 1

            Cls

            updateScore

            drawTable

            striker csx, csy

            striker psx, psy

            puck pr, py

            For i = 0 To pr Step 4

                shade = 64 + i / pr2 * 100

                Color _RGB32(shade, shade, shade)

                Line (i, tw13)-(pr, tw23), , BF ' wow tw13 has been 0

            Next

            snd 1200, 200

            snd 2200, 300

            _Display

            initball

            _Delay .5

            Exit Sub

        Else

            snd 2600, 8

            pa = _Pi(1) - pa

            px = pr2 + pr

        End If

    End If



    If px + pr > tl - pr2 Then

        If tw13 < py - pr And py + pr < tw23 Then

            computer = computer + 1

            Cls

            updateScore

            drawTable

            striker csx, csy

            striker psx, psy

            puck tl - pr, py

            For i = 0 To pr Step 4

                shade = 64 + i / pr2 * 100

                Color _RGB32(shade, shade, shade)

                Line (tl - pr, tw13)-(tl - i, tw23), , BF 't13 again!

            Next

            snd 2200, 300

            snd 1200, 200

            _Display

            initball

            _Delay .5

            Exit Sub

        Else

            snd 2600, 5

            pa = _Pi(1) - pa

            px = tl - pr2 - pr

        End If

    End If



    If py - pr < pr2 Then ' hit top boundry

        snd 2600, 8

        pa = -pa

        py = pr2 + pr

    End If



    If py + pr > tw - pr2 Then ' hit bottom boundry

        snd 2600, 8

        pa = -pa

        py = tw - pr2 - pr

    End If



    If Sqr((px - psx) ^ 2 + (py - psy) ^ 2) < (pr + pr2) Then 'contact player striker

        pa = _Atan2(py - psy, px - psx)

        'boost puck away

        px = px + .5 * speed * Cos(pa)

        py = py + .5 * speed * Sin(pa)

        snd 2200, 4

    End If

    If Sqr((px - csx) ^ 2 + (py - csy) ^ 2) < (pr + pr2) Then 'contact computer striker

        pa = _Atan2(py - csy, px - csx)

        'boost puck away

        px = px + .5 * speed * Cos(pa)

        py = py + .5 * speed * Sin(pa)

        snd 2200, 4

    End If

    puck px, py ' here it is!

End Sub



Sub puck (x, y)

    fillcirc x, y, pr, _RGB32(160, 160, 160)

    fillcirc x, y, pr - 4, _RGB32(190, 100, 0)

End Sub



Sub striker (x, y)

    Dim i, shade

    For i = pr2 To pr Step -1

        shade = 164 - 90 * Sin(i * _Pi(2) / pr)

        fillcirc x, y, i, _RGB32(shade, shade, shade)

    Next

    For i = pr To 0 Step -1

        shade = 185 + 70 * (pr - i) / pr

        fillcirc x, y, i, _RGB32(shade, shade, shade)

    Next

End Sub



'Steve McNeil's  copied from his forum   note: Radius is too common a name

Sub fillcirc (CX As Long, CY As Long, R As Long, C As _Unsigned Long)

    Dim subRadius As Long, RadiusError As Long

    Dim X As Long, Y As Long



    subRadius = Abs(R)

    RadiusError = -subRadius

    X = subRadius

    Y = 0



    If subRadius = 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



Sub snd (frq, dur)

    Sound frq / 2.2, dur * .01

End Sub



Sub cp (lineNum, s$)

    Dim x, y

    '1200 pixels / 85 characters = 14.11 pixels/char wide

    '700 pixels / 28 lines = 18.42 pixels / char high

    x = (xmax - 11 * Len(s$)) \ 2

    y = lineNum * 25

    _PrintString (x, y), s$

End Sub