Joystick position: Difference between revisions
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===Commodore 64===
On the Commodore 64, both joystick ports can be read from registers on the CIA#1 6526 chip. This will report binary input from the joystick control ports in bits 0 through 4 (four directions plus a single fire or action button.) Control Port 1 is read from location 56321 and Control Port 2 is read from location 56320.
<lang commodorebasicv2>5 rem joystick - commodore 64
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Revision as of 19:34, 1 September 2020
You are encouraged to solve this task according to the task description, using any language you may know.
The task is to determine the joystick position and represent this on the display via a crosshair. For a centred joystick, the crosshair should appear in the centre of the screen. If the joystick is pushed left or right, then the cross hair should move left or right according to the extent that the joystick is pushed.
If the joystick is pushed forward or pulled back, then the crosshair should move up or down according to the extent that that joystick is pushed or pulled. The edges of the display represent maximum extents for joystick movement.
For example, a joystick pushed fully forward would raise the crosshair to the top centre of the screen.
A joystick pulled backwards and to the right would move the crosshair to the bottom right of the screen (except for a small area reserved to show joystick status). Implementations can use a graphical display method to produce the crosshair, or alternatively represent the crosshair using a plus symbol on a terminal, and move the plus symbol position according to the joystick. The bottom part of the display can hide or show an alphanumeric sequence to represent the buttons pressed.
For example, if pushbuttons 1,4 and 10 are depressed, we could display "1 4 A".
The implemented code should continue to redraw the crosshair according to the joystick position and show the current pushbutton statuses until the task is terminated. Digital joysticks that produce no extent data, should have their position indicated as full extent movement of the crosshair.
For the purpose of this task, we assume that the joystick is calibrated and that the first joystick is being used.
The task implementer could at their option provide a solution that includes a joystick selection facility, enabling the user to choose which joystick is to be used for this task.
Applesoft BASIC
<lang ApplesoftBasic>100 GOSUB 400 110 P2 = PDL(2) : IF P2 <> O2 THEN O2 = P2 : VTAB 23 : HTAB 33 : PRINT P2; TAB(37); 120 B2 = FNB(2) : IF B2 <> N2 THEN N2 = B2 : VTAB 24 : HTAB 15 : PRINT P$(B2); 130 P3 = PDL(3) : IF P3 <> O3 THEN O3 = P3 : VTAB 23 : HTAB 37 : PRINT P3; : CALL -868 140 X = INT(P3 * RX) : Y = INT(P2 * RY(F)) 150 O = (X1 = X2 AND Y1 = Y2) + 1 160 N = (X = X1 AND Y = Y1) + 1 170 IF X <> X2 OR Y <> Y2 THEN XDRAW N AT X, Y : XDRAW O AT X2, Y2 : X2 = X : Y2 = Y : O = N 200 P0 = PDL(0) : IF P0 <> O0 THEN O0 = P0 : VTAB 22 : HTAB 33 : PRINT P0; TAB(37); 210 B0 = FNB(0) : IF B0 <> N0 THEN N0 = B0 : VTAB 22 : HTAB 15 : PRINT P$(B0); 220 P1 = PDL(1) : IF P1 <> O1 THEN O1 = P1 : VTAB 22 : HTAB 37 : PRINT P1; : CALL -868 230 B1 = FNB(1) : IF B1 <> N1 THEN N1 = B1 : VTAB 23 : HTAB 15 : PRINT P$(B1); 240 X = INT(P0 * RX) : Y = INT(P1 * RY(F)) 250 O = (X1 = X2 AND Y1 = Y2) + 1 260 N = (X = X2 AND Y = Y2) + 1 270 IF X <> X1 OR Y <> Y1 THEN XDRAW N AT X, Y : XDRAW O AT X1, Y1 : X1 = X : Y1 = Y 300 K = PEEK(-16384) : IF K < 128 THEN 110 310 POKE-16368,0 320 IF K = 198 OR K = 200 THEN F = PEEK(-16302) ^ 0 : GOTO 110HIDE 330 IF K = 155 OR K = 211 THEN F = PEEK(-16301) * 0 : GOTO 110SHOW 340 TEXT : END 400 HOME : HGR 410 DEF FN B(B) = PEEK(49249 + B) > 127 420 P$(0) = "NOT PRESSED" : P$(1) = "PRESSED " 430 VTAB 21 : PRINT "BUTTON:"; 440 PRINT TAB(28); "JOYSTICK:" 450 PRINT " OPEN APPLE "P$(0); 460 PRINT TAB(29); "ONE" 470 PRINT " CLOSED APPLE "P$(0); 480 PRINT TAB(29); "TWO" 490 PRINT TAB(9); "SHIFT "P$(0); 500 RX = 35 / 32 : RY(0) = 5 / 8 : RY(1) = 3 / 4 510 DATA2,0,6,0,3,0,29,15,20,6,0 520 FOR I = 768 TO 778 : READ B 530 POKE I, B : NEXT : POKE 232, 0 : POKE 233, 3 550 ROT = 0 : SCALE = 7 : XDRAW 1 AT X1, Y1 560 O0 = -1 : O1 = O0 : O2 = O0 : O3 = O0 570 RETURN</lang>
AutoHotkey
Image link <lang AutoHotkey>; Uncomment if Gdip.ahk is not in your standard library
- #Include, Gdip.ahk
- Comment for lower CPU usage
SetBatchLines, -1
JoystickNumber := 0 ; (1-16) or (0 = Auto-detect) CrosshairSize := 100 BarWidth := 50 BarSpacing := BarWidth + 8 Color1 := 0x99000000 Color2 := 0x99ffffff Color3 := 0x99ff6600 Color4 := 0xff0066ff Color5 := 0xffff6600 Font := "Arial" FontSize1 := 20 FontSize2 := 30 Lineweight1 := 8 Lineweight2 := 3 Lineweight3 := 2 Lineweight4 := 4 Show2ndCrosshair := true AxisLabelHeight := 47
- SingleInstance, Force
- NoEnv
OnExit, Exit SysGet, MWA, MonitorWorkArea CrosshairOffset := CrosshairSize // 2 , CircleOffset := CrosshairOffset - 5 , CircleSize := CrosshairSize - 10 , TaskBarHeight := A_ScreenHeight - MWABottom + Lineweight1 // 2 , ScaleX := A_ScreenWidth / 100 , ScaleY1 := (A_ScreenHeight - TaskBarHeight - AxisLabelHeight) / 100 , ScaleY2 := A_ScreenHeight / 100 , BarCenter := (MWABottom - AxisLabelHeight) // 2 + AxisLabelHeight , BorderBot := MWABottom - Lineweight1 // 2 + 2 , PieSize := 400 , PieX := (A_ScreenWidth - PieSize) // 2 , PieY := (A_ScreenHeight - PieSize) // 2 , BarHeight := A_ScreenHeight - AxisLabelHeight - TaskBarHeight , AxisTextOffset := BarWidth > 32 ? (BarWidth - 32) // 2 : 0 , Axis_Array := {"X": "X", "Y": "Y"} , MaxI := 2
- Auto-detect the joystick number if called for
if (JoystickNumber < 1) {
Loop, 16 { GetKeyState, Joy_Name, %A_Index%JoyName if (Joy_Name) { JoystickNumber := A_Index break } } if (!JoystickNumber) { MsgBox The system does not appear to have any joysticks. ExitApp }
} else {
GetKeyState, Joy_Name, %JoystickNumber%JoyName if (!Joy_Name) { MsgBox The system does not appear to have a joystick number %JoystickNumber%. ExitApp }
}
if (!pToken := Gdip_Startup()) {
MsgBox, 48, Gdiplus error!, Gdiplus failed to start. Please ensure you have Gdiplus on your system. ExitApp
}
If (!Gdip_FontFamilyCreate(Font)) {
MsgBox, 48, Font error!, The font you have specified does not exist on your system. ExitApp
}
- Get joystick information
SetFormat, FloatFast, 03.2 GetKeyState, Joy_Buttons, % JoystickNumber "JoyButtons" GetKeyState, Joy_Info, % JoystickNumber "JoyInfo" Loop, Parse, Joy_Info
if (A_LoopField != "C" && A_LoopField != "D" && A_LoopField != "P") Axis_Array[A_LoopField] := A_LoopField , %A_LoopField% := true , MaxI++ else %A_LoopField% := true
- Setup Gdip
Gui, 1: -Caption +E0x80000 +LastFound +AlwaysOnTop +ToolWindow +OwnDialogs Gui, 1: Show, NA hwnd1 := WinExist() , hbm := CreateDIBSection(A_ScreenWidth, A_ScreenHeight) , hdc := CreateCompatibleDC() , obm := SelectObject(hdc, hbm) , G1 := Gdip_GraphicsFromHDC(hdc) , Gdip_SetSmoothingMode(G1, 4) , pPen1 := Gdip_CreatePen(Color1, Lineweight1) , pPen2 := Gdip_CreatePen(Color2, Lineweight2) , pPen3 := Gdip_CreatePen(Color4, Lineweight3) , pPen4 := Gdip_CreatePen(Color5, Lineweight4) , pBrush1 := Gdip_BrushCreateSolid(Color1) , pBrush2 := Gdip_BrushCreateSolid(Color3)
- Crosshair 2
if ((R || U) && Show2ndCrosshair) {
pPen5 := Gdip_CreatePen(Color5, Lineweight3) , pPen6 := Gdip_CreatePen(Color4, Lineweight4) , joy_r := joy_u := 50
}
- Bar X-offsets
for key, val in Axis_Array
%val%X := A_ScreenWidth - MaxI * BarSpacing + BarSpacing * (A_Index - 1) + 3
- Info box
IBH1 := 150 , IBW1 := 450 , IBX1 := A_ScreenWidth - MaxI * BarSpacing - IBW1 , IBY1 := A_ScreenHeight - TaskBarHeight - IBH1 + Lineweight1 // 2 , IBH2 := IBH1 - 8 , IBW2 := IBW1 - 8 , IBX2 := IBX1 + 4 , IBY2 := IBY1 + 4 , FontOptions1 := "x" (IBX1 + 8) " y" (IBY1 + 8) " w" IBW1 - 20 " Left c" SubStr(Color2, 3) " r4 s" FontSize1 " Bold"
- Axis box
ABH1 := AxisLabelHeight + 4 , ABW1 := MaxI * BarSpacing , ABX1 := A_ScreenWidth - MaxI * BarSpacing , ABY1 := 0 , ABH2 := ABH1 - 16 , ABW2 := ABW1 - 8 , ABX2 := ABX1 + 4 , ABY2 := ABY1 + 4 , FontOptions2 := " y" ABY1 + AxisLabelHeight - 40 " w" ABW1 - 10 " Left c" SubStr(Color2, 3) " r4 s" FontSize2 " Bold"
- Update graphics
Loop, {
Buttons_Down := "" Loop, %Joy_Buttons% { GetKeyState, joy%A_Index%, %JoystickNumber%joy%A_Index% if (joy%A_Index% = "D") Buttons_Down .= " " A_Index }
; Info & axis boxes InfoText := Joy_Name " (#" JoystickNumber "):`n" Axis_Info "`nButtons Down: " Buttons_Down "`n`n(Ctrl+Esc to exit)" , Gdip_FillRoundedRectangle(G1, pBrush1, IBX1, IBY1, IBW1, IBH1, 5) , Gdip_DrawRoundedRectangle(G1, pPen2, IBX2, IBY2, IBW2, IBH2, 5) , Gdip_TextToGraphics(G1, InfoText, FontOptions1, Font, A_ScreenWidth, A_ScreenHeight) , Gdip_FillRoundedRectangle(G1, pBrush1, ABX1, ABY1, ABW1, ABH1, 5) , Gdip_DrawRoundedRectangle(G1, pPen2, ABX2, ABY2, ABW2, ABH2, 5)
; Axis bars Axis_Info := "" for key, val in Axis_Array { GetKeyState, joy_%val%, % JoystickNumber "Joy" val Axis_Info .= val joy_%val% " " if (joy_%val% > 50) %val%Y := BarCenter , %val%h1 := (joy_%val% - 50) * ScaleY1 else %val%Y := AxisLabelHeight + joy_%val% * ScaleY1 ; , Sc - (joy_%val% - 50) * ScaleY1 , %val%h1 := BarCenter - %val%Y Gdip_FillRoundedRectangle(G1, pBrush2, %val%X, %val%Y, BarWidth, %val%h1, 2) , Gdip_DrawRoundedRectangle(G1, pPen1, %val%X, AxisLabelHeight, BarWidth, BarHeight, 5) , Gdip_DrawRoundedRectangle(G1, pPen2, %val%X, AxisLabelHeight, BarWidth, BarHeight, 5) , Gdip_TextToGraphics(G1, val, "x" (%val%X + AxisTextOffset) FontOptions2, Font, A_ScreenWidth, A_ScreenHeight) }
; POV hat If (P) { GetKeyState, Joy_P, %JoystickNumber%JoyPOV Axis_Info .= " POV" Joy_P if (Joy_P > -1) {
StartAngle := (Joy_P > 33750 || Joy_P <= 2250) ? 247.5 ; up : Joy_P > 29250 ? 202.5 ; up left : Joy_P > 24750 ? 157.5 ; left : Joy_P > 20250 ? 112.5 ; down left : Joy_P > 15750 ? 67.5 ; down : Joy_P > 11250 ? 22.5 ; down right : Joy_P > 6750 ? 337.5 ; right : 292.5 ; up right
, Gdip_FillPie(G1, pBrush2, PieX, PieY, PieSize, PieSize, StartAngle, 45) , Gdip_DrawPie(G1, pPen1, PieX, PieY, PieSize, PieSize, StartAngle, 45) , Gdip_DrawPie(G1, pPen2, PieX, PieY, PieSize, PieSize, StartAngle, 45) } }
; Crosshair 1 CenterX := ScaleX * joy_x , CenterY := ScaleY2 * joy_y , Gdip_DrawLine(G1, pPen3, CenterX-CrosshairOffset, CenterY, CenterX+CrosshairOffset, CenterY) , Gdip_DrawLine(G1, pPen3, CenterX, CenterY-CrosshairOffset, CenterX, CenterY+CrosshairOffset) , Gdip_DrawEllipse(G1, pPen4, CenterX-CircleOffset, CenterY-CircleOffset, CircleSize, CircleSize) , Gdip_DrawEllipse(G1, pPen4, CenterX-3, CenterY-3, 6, 6)
; Crosshair 2 if ((R || U) && Show2ndCrosshair) CenterU := ScaleX * joy_u , CenterR := ScaleY2 * joy_r , Gdip_DrawLine(G1, pPen5, CenterU-CrosshairOffset, CenterR, CenterU+CrosshairOffset, CenterR) , Gdip_DrawLine(G1, pPen5, CenterU, CenterR-CrosshairOffset, CenterU, CenterR+CrosshairOffset) , Gdip_DrawEllipse(G1, pPen6, CenterU-CircleOffset, CenterR-CircleOffset, CircleSize, CircleSize) , Gdip_DrawEllipse(G1, pPen6, CenterU-3, CenterR-3, 6, 6)
UpdateLayeredWindow(hwnd1, hdc, 0, 0, A_ScreenWidth, A_ScreenHeight) , Gdip_GraphicsClear(G1)
} return
^Esc:: Exit: Gdip_Shutdown(pToken) ExitApp</lang>
BBC BASIC
<lang bbcbasic> VDU 23,22,512;512;8,16,16,0
VDU 5 GCOL 4,15 REPEAT B% = ADVAL(0) X% = ADVAL(1) / 64 Y% = 1023 - ADVAL(2) / 64 PROCjoy(B%,X%,Y%) WAIT 4 PROCjoy(B%,X%,Y%) UNTIL FALSE END DEF PROCjoy(B%,X%,Y%) LOCAL I% LINE X%-32,Y%,X%+32,Y% : LINE X%,Y%-32,X%,Y%+32 VDU 30 FOR I% = 0 TO 15 IF B% AND 1<<I% THEN PRINT "Button "; I%+1 " pressed"; VDU 10,13 NEXT ENDPROC</lang>
Commodore BASIC
Commodore VIC-20
The VIC-20 has only one control port. Even still, to be able to read all the possible inputs, we have to poll two different registers. VIA #1 handles most of the joystick inputs, VIA #2 handles the "right direction" input line. For proper operation, we must set the data direction on VIA#2 to input on bit 7 of the Port B register, and then return it to output when the program is completed in order to re-enable full function of the keyboard.
This program maps the values from both registers to bits 0 through 4 of a single byte so that logic is evaluated identical to the C-64 example below.
<lang commodorebasicv2>5 rem joystick - commodore vic-20 (expanded) 6 rem for rosetta code 10 print chr$(147);:poke 37154,peek(37154) and 127 15 j1=37137:j2=37152:sc=4118:co=37910:x=11:y=11 20 poke sc+x+y*22,43:poke co+x+y*22,0 25 j=(not peek(j1) and28)/4 30 j=j+(not peek(j1) and32)/2 35 j=j+(not peek(j2) and128)/16 40 print chr$(19);"joy: "; 45 get k$:if k$="q" then print chr$(147):poke 37154,peek(37154)or128:end 50 ox=x:oy=y 60 if(j and 1) then y=1:ud$="u" 61 if(j and 2) then y=21:ud$="d" 62 if(j and 3)=0 then y=11:ud$=" " 63 if(j and 4) then x=0:lr$="l" 64 if(j and 8) then x=21:lr$="r" 65 if(j and 12)=0 then x=11:lr$=" " 66 if(j and 16) then f$="fire!":c=24 67 if(j and 16)=0 then f$=" ":c=43 70 print tab(5);ud$;tab(7);lr$;tab(9);f$; 75 poke sc+x+y*22,c:poke co+x+y*22,0 80 if (ox=x) and (oy=y) then goto 100 85 poke sc+ox+oy*22,32 100 goto 25</lang>
Commodore 64
On the Commodore 64, both joystick ports can be read from registers on the CIA#1 6526 chip. This will report binary input from the joystick control ports in bits 0 through 4 (four directions plus a single fire or action button.) Control Port 1 is read from location 56321 and Control Port 2 is read from location 56320.
<lang commodorebasicv2>5 rem joystick - commodore 64 6 rem for rosetta code 8 rem black bkg, white text, dk. grey border 9 poke 53280,11:poke 53281,0:poke 646,1 10 print chr$(147);"joystick port 1 or 2";:input jp 11 if jp<1 or jp>2 then print:print"invalid.":print:goto 10 12 jp=(jp=2)+56321:print chr$(147); 15 sc=1024:x=20:y=12:poke sc+x+y*40,43 20 j=not peek(jp) and 31 25 print chr$(19);"{CRSR DOWN 24}joy status: "; 26 get k$:if k$="q" then print chr$(147):end 35 ox=x:oy=y 40 if(j and 1) then y=0:ud$="up " 45 if(j and 2) then y=23:ud$="down" 46 if(j and 3)=0 then y=12:ud$=" " 50 if(j and 4) then x=0:lr$="left " 55 if(j and 8) then x=39:lr$="right" 56 if(j and 12)=0 then x=20:lr$=" " 60 if(j and 16) then f$="fire!":c=24 61 if(j and 16)=0 then f$=" ":c=43 65 print tab(12);ud$;tab(17);lr$;tab(23);f$; 85 poke sc+x+y*40,c:if (ox=x) and (oy=y) then goto 100 90 poke sc+ox+oy*40,32 100 goto 20</lang>
Commodore Plus/4
The Commodore Plus/4 has the JOY(n) function available in BASIC v3.5 to read the position of a joystick plugged into control port n. The return value is a number 1 through 8 corresponding to each unique direction in a clockwise order, beginning with "up" returning a value of "1". Bit 7 of the return value will report the status of the fire button.
<lang gwbasic>5 rem joystick - commodore plus/4 6 rem for rosetta code 8 rem black bkg, white text, dk. grey border 9 color 0,1:color 4,2,1:color 1,2,7 10 print chr$(147);"joystick port 1 or 2";:input jp 11 if jp<1 or jp>2 then print:print"invalid.":print:goto 10 12 print chr$(147); 15 sc=3072:x=20:y=13:poke sc+x+y*40,43 20 j=joy(jp) 25 print chr$(19);"joy status: "; 26 get k$:if k$="q" then print chr$(147):end 35 ox=x:oy=y 40 if(j and 15)=1 then d$="up ":x=20:y=1:goto 48 41 if(j and 15)=2 then d$="up right":x=39:y=1:goto 48 42 if(j and 15)=3 then d$=" right":x=39:y=13:goto 48 43 if(j and 15)=4 then d$="down right":x=39:y=24:goto 48 44 if(j and 15)=5 then d$="down ":x=20:y=24:goto 48 45 if(j and 15)=6 then d$="down left ":x=0:y=24:goto 48 46 if(j and 15)=7 then d$=" left ":x=0:y=13:goto 48 47 if(j and 15)=8 then d$="up left ":x=0:y=1 48 if(j and 128) then f$="fire!":c=24 49 if(j and 128)=0 then f$=" ":c=43 50 if(j=0) then d$=" ":x=20:y=13 65 print tab(12);d$;tab(23);f$; 85 poke sc+x+y*40,c:if (ox=x) and (oy=y) then goto 100 90 poke sc+ox+oy*40,32 100 goto 20</lang>
Commodore 128
BASIC 7.0 retains the same functionality of BASIC 3.5 on the Plus/4 for reading the joystick port(s). The C128 can take advantage of dual screen output.
<lang gwbasic>5 rem joystick - commodore 128 6 rem for rosetta code 8 rem black bkg, white text, dk. grey border 9 color 0,1:color 4,12:color 1,2:graphic 0:scnclr 0:graphic 5 10 print chr$(147);"joystick port 1 or 2";:input jp 11 if jp<1 or jp>2 then print:print"invalid.":print:goto 10 12 print chr$(147); 15 sc=1024:x=20:y=12:poke sc+x+y*40,43 20 j=joy(jp) 25 print chr$(19);"joy status: "; 26 get k$:if k$="q" then print chr$(147):end 35 ox=x:oy=y 40 if(j and 15)=1 then d$="up ":x=20:y=0:goto 48 41 if(j and 15)=2 then d$="up right":x=39:y=0:goto 48 42 if(j and 15)=3 then d$=" right":x=39:y=12:goto 48 43 if(j and 15)=4 then d$="down right":x=39:y=24:goto 48 44 if(j and 15)=5 then d$="down ":x=20:y=24:goto 48 45 if(j and 15)=6 then d$="down left ":x=0:y=24:goto 48 46 if(j and 15)=7 then d$=" left ":x=0:y=12:goto 48 47 if(j and 15)=8 then d$="up left ":x=0:y=0 48 if(j and 128) then f$="fire!":c=24 49 if(j and 128)=0 then f$=" ":c=43 50 if(j=0) then d$=" ":x=20:y=12 65 print tab(12);d$;tab(23);f$; 85 poke sc+x+y*40,c:if (ox=x) and (oy=y)then goto 100 90 poke sc+ox+oy*40,32 100 goto 20</lang>
Delphi
Form application version. <lang Delphi> unit uMain;
interface
uses
Winapi.Windows, System.SysUtils, System.Classes, Vcl.Controls, Vcl.Forms, Vcl.ExtCtrls, Vcl.StdCtrls;
type
TForm1 = class(TForm) tmr1: TTimer; lblPosition: TLabel; procedure tmr1Timer(Sender: TObject); procedure FormPaint(Sender: TObject); private { Private declarations } public { Public declarations } procedure DrawCrosshair(X, Y: Integer); end;
var
Form1: TForm1; X: Integer = 0; Y: Integer = 0;
implementation
uses
mmSystem, Vcl.Graphics;
{$R *.dfm}
procedure TForm1.DrawCrosshair(X, Y: Integer); const
RADIUS = 10; CROSS = 3;
begin
Canvas.Brush.Color := clblack; Canvas.FillRect(ClientRect); with Canvas do begin Pen.Color := clWhite; pen.Width := 1; Ellipse(X - RADIUS, Y - RADIUS, X + RADIUS, Y + RADIUS); pen.Width := 2; MoveTo(X - CROSS * RADIUS, Y); LineTo(X + CROSS * RADIUS, Y); MoveTo(X, Y - CROSS * RADIUS); LineTo(X, Y + CROSS * RADIUS); end;
end;
procedure TForm1.FormPaint(Sender: TObject); begin
DrawCrosshair(X, Y);
end;
procedure TForm1.tmr1Timer(Sender: TObject); var
info: TJoyInfo;
begin
if (joyGetPos(0, @info) = 0) then begin X := Round(ClientWidth * info.wXpos / MAXWORD); Y := Round(ClientHeight * info.wYpos / MAXWORD); lblPosition.Caption := Format('(%3d,%3d)', [X, Y]); Invalidate; end;
end;
end. </lang> Form resource: <lang Delphi> object Form1: TForm1
Left = 0 Top = 0 Caption = 'Form1' ClientHeight = 600 ClientWidth = 600 Color = clBtnFace Font.Charset = DEFAULT_CHARSET Font.Color = clWindowText Font.Height = -11 Font.Name = 'Tahoma' Font.Style = [] OldCreateOrder = False OnPaint = FormPaint PixelsPerInch = 96 TextHeight = 13 object lblPosition: TLabel Left = 500 Top = 0 Width = 100 Height = 21 Alignment = taCenter AutoSize = False Caption = '(0,0)' Font.Charset = DEFAULT_CHARSET Font.Color = clWhite Font.Height = -20 Font.Name = 'Tahoma' Font.Style = [] ParentFont = False end object tmr1: TTimer Interval = 500 OnTimer = tmr1Timer end
end </lang>
- Output:
Result preview [1]
Go
<lang go>package main
import (
"fmt" "github.com/nsf/termbox-go" "github.com/simulatedsimian/joystick" "log" "os" "strconv" "time"
)
func printAt(x, y int, s string) {
for _, r := range s { termbox.SetCell(x, y, r, termbox.ColorDefault, termbox.ColorDefault) x++ }
}
func readJoystick(js joystick.Joystick, hidden bool) {
jinfo, err := js.Read() check(err)
w, h := termbox.Size() tbcd := termbox.ColorDefault termbox.Clear(tbcd, tbcd) printAt(1, h-1, "q - quit") if hidden { printAt(11, h-1, "s - show buttons:") } else { bs := "" printAt(11, h-1, "h - hide buttons:") for button := 0; button < js.ButtonCount(); button++ { if jinfo.Buttons&(1<<uint32(button)) != 0 { // Buttons assumed to be numbered from 1, not 0. bs += fmt.Sprintf(" %X", button+1) } } printAt(28, h-1, bs) }
// Map axis values in range -32767 to +32768 to termbox co-ordinates. x := int(float64((jinfo.AxisData[0]+32767)*(w-1)) / 65535) y := int(float64((jinfo.AxisData[1]+32767)*(h-2)) / 65535) printAt(x, y, "+") // display crosshair termbox.Flush()
}
func check(err error) {
if err != nil { log.Fatal(err) }
}
func main() {
// Under Linux the id is used to construct the joystick device name. // For example: id 0 will open device: "/dev/input/js0" // Under Windows the id is the actual numeric id of the joystick. jsid := 0 // Optionally pass joystick id to be used as a command line argument. if len(os.Args) > 1 { i, err := strconv.Atoi(os.Args[1]) check(err) jsid = i }
js, jserr := joystick.Open(jsid) check(jserr) err := termbox.Init() check(err) defer termbox.Close()
eventQueue := make(chan termbox.Event) go func() { for { eventQueue <- termbox.PollEvent() } }()
ticker := time.NewTicker(time.Millisecond * 40) hidden := false // Controls whether button display hidden or not.
for doQuit := false; !doQuit; { select { case ev := <-eventQueue: if ev.Type == termbox.EventKey { if ev.Ch == 'q' { doQuit = true } else if ev.Ch == 'h' { hidden = true } else if ev.Ch == 's' { hidden = false } } if ev.Type == termbox.EventResize { termbox.Flush() } case <-ticker.C: readJoystick(js, hidden) } }
}</lang>
GUISS
Graphical User Interface Support Script only makes use of installed applications. So for this task, we use the joystick calibration routine, which shows a joystick position indicator:
<lang guiss>Start,Control Panel, Game Controllers, List:installed controllers,Click:Joystick, Button:Properties,Button:Test</lang>
Haskell
Half-solution of the problem, exhibits X and Y coordinates of the joystick; works on Windows (Haskell Platform):
<lang Haskell>import qualified Graphics.UI.GLFW as GLFW -- cabal install GLFW-b import Graphics.Win32.Key import Control.Monad.RWS.Strict (liftIO)
main = do
liftIO $ do _ <- GLFW.init GLFW.pollEvents (jxrot, jyrot) <- liftIO $ getJoystickDirections GLFW.Joystick'1 putStrLn $ (show jxrot) ++ " " ++ (show jyrot) w <- getAsyncKeyState 27 -- ESC pressed? if (w<1) then main else do GLFW.terminate return ()
getJoystickDirections :: GLFW.Joystick -> IO (Double, Double)
getJoystickDirections js = do
maxes <- GLFW.getJoystickAxes js return $ case maxes of (Just (x:y:_)) -> (-y, x) _ -> ( 0, 0)
</lang>
IS-BASIC
<lang IS-BASIC>100 CLEAR SCREEN 110 DO 120 LET J=JOY(0) OR JOY(1) OR JOY(2) 130 PRINT AT 1,1:" ";:PRINT AT 1,1:""; 140 IF J BAND 1 THEN PRINT "right "; 150 IF J BAND 2 THEN PRINT "left "; 160 IF J BAND 4 THEN PRINT "down "; 170 IF J BAND 8 THEN PRINT "up "; 180 IF J BAND 16 THEN PRINT "fire "; 190 LOOP</lang>
Julia
<lang julia>using CSFML.LibCSFML, Gtk.ShortNames, Colors, Graphics, Cairo
- ------------ input code ----------------------#
mutable struct Joystick
devnum::Int isconnected::Bool hasXaxis::Bool nbuttons::Int pressed::Vector{Bool} ypos::Int xpos::Int name::String Joystick(n, b=2, c=false, x=true) = new(n, c, x, b, fill(false, b), 0, 0)
end
const devnum = 0 const buttons = 2 const jstick = Joystick(devnum, buttons)
function polljoystick(jstick, sleepinterval=0.05)
while !sfJoystick_isConnected(jstick.devnum) sleep(0.25) # wait till connected sfJoystick_update() end jstick.name = sfJoystick_getIdentification(jstick.devnum).name jstick.isconnected = true jstick.hasXaxis = sfJoystick_hasAxis(jstick.devnum, 0) jstick.nbuttons = sfJoystick_getButtonCount(jstick.devnum) while true sfJoystick_update() for i in 1:jstick.nbuttons jstick.pressed[i] = sfJoystick_isButtonPressed(jstick.devnum, i - 1) end jstick.ypos = sfJoystick_getAxisPosition(jstick.devnum, 1) jstick.xpos = sfJoystick_getAxisPosition(joystick.devnum, 0) yield() sleep(sleepinterval) end
end
- ------------ output code -------------------#
makelabel() = "Button 1: " * (jstick.pressed[1] ? "DOWN" : "UP") *
" Button 2: " * (jstick.pressed[2] ? "DOWN" : "UP")
const fontpointsize = 80 const wid = 500 const hei = 500 win = Window("Cursor Task", wid, hei) |> (Frame() |> (vbox = Box(:v))) set_gtk_property!(vbox, :expand, true) can = Canvas(wid, hei) label = Label(makelabel()) push!(vbox, can, label)
joytoxpos() = div((jstick.xpos + 100) * width(can), 200) joytoypos() = div((jstick.ypos + 100) * height(can), 200) Gtk.showall(win)
@guarded draw(can) do widget
ctx = getgc(can) select_font_face(ctx, "Courier", Cairo.FONT_SLANT_NORMAL, Cairo.FONT_WEIGHT_BOLD) set_font_size(ctx, fontpointsize) set_source(ctx, colorant"red") move_to(ctx, joytoxpos(), joytoypos()) show_text(ctx, "+") set_gtk_property!(label, :label, makelabel())
end
@async polljoystick(jstick)
while true
draw(can) sleep(0.2) yield()
end </lang>
Liberty BASIC
<lang lb> 'disable text window
nomainwin
'set window size WindowWidth = 308 WindowHeight = 331
'center window on screen UpperLeftX = int((DisplayWidth-WindowWidth)/2) UpperLeftY = int((DisplayHeight-WindowHeight)/2)
'open graphics window open "Joystick Position" for graphics_nf_nsb as #m
'trap window closing #m "trapclose [quit]"
'put pen down #m "down"
'get center of graphics window #m "home" #m "posxy CenterX CenterY"
'draw sprite for crosshair #m "backcolor black; color black" #m "place 0 20;boxfilled 20 40" #m "line 0 10 20 10" #m "line 10 0 10 20" #m "place 10 10; circle 10" #m "backcolor white; color red" #m "line 0 30 20 30" #m "line 10 20 10 40" #m "place 10 30; circle 10" #m "flush"
'get sprite image #m "getbmp plus 0 0 20 40" #m "cls"
'create sprite from image #m "addsprite crosshair plus" #m "centersprite crosshair" #m "spritexy crosshair "; CenterX; " "; CenterY #m "drawsprites"
'check joystick every 100 milliseconds timer 100, [CheckJoystick] wait
[CheckJoystick]
readjoystick 1
'calculate crosshair position PosX = int(CenterX*Joy1x/32767) PosY = int(CenterY*Joy1y/32767)
'update crosshair position #m "spritexy crosshair "; PosX; " "; PosY #m "drawsprites"
'display button information if Joy1button1 > 0 then #m "place 0 0;\\Button 1 pressed" if Joy1button2 > 0 then #m "place 0 0;\\\Button 2 pressed"
wait
[quit]
timer 0 close #m unloadbmp "plus" end</lang>
Locomotive Basic
<lang locobasic>10 MODE 1:BORDER 14:x=320:y=200:d=1 20 a=JOY(0) ' read state of first joystick 30 IF d THEN q$="*" ELSE q$=" " 40 IF a THEN MOVE x-8,y+8:TAG:PRINT q$;:TAGOFF 50 IF (a AND 1) AND y<380 THEN y=y+10 60 IF (a AND 2) AND y>20 THEN y=y-10 70 IF (a AND 4) AND x>20 THEN x=x-10 80 IF (a AND 8) AND x<620 THEN x=x+10 90 IF a AND 16 THEN LOCATE 1,1:PRINT "Fire1 pressed":d=1 100 IF a AND 32 THEN LOCATE 1,2:PRINT "Fire2 pressed":d=0 110 IF a<16 THEN LOCATE 1,1:PRINT " ":PRINT " " 120 MOVE x-8,y+8:TAG:PRINT "X";:TAGOFF 130 GOTO 20</lang>
Output (this version supports drawing with the cursor):
Mathematica
<lang Mathematica>Slider2D[Dynamic[ControllerState[{"X", "Y"}]], ImageSize -> {500, 500}]</lang>
OCaml
<lang ocaml>let remove x = List.filter (fun y -> y <> x) let buttons_string b =
String.concat " " (List.map string_of_int b)
let position app x y =
let view = SFRenderWindow.getView app in let width, height = SFView.getSize view in let hw = width /. 2.0 in let hh = height /. 2.0 in (hw +. ((x /. 100.0) *. hw), hh +. ((y /. 100.0) *. hh))
let cross =
[| 1.0, 1.0; 10.0, 1.0; 10.0, -1.0; 1.0, -1.0; 1.0, -10.0; -1.0, -10.0; -1.0, -1.0; -10.0, -1.0; -10.0, 1.0; -1.0, 1.0; -1.0, 10.0; 1.0, 10.0; |]
let () =
let app = SFRenderWindow.make (800, 600) "Joystick Position" in let text = SFText.make "" in let shape = SFShape.create cross in SFShape.setFillColor shape SFColor.white; SFShape.setOutlineColor shape SFColor.white; SFShape.setOutlineThickness shape 1.0; let rec display ((x, y), b) = SFText.setString text (buttons_string b); let x, y = position app x y in SFShape.setPosition shape (x, y); SFRenderWindow.clear app SFColor.black; SFRenderWindow.drawText app text (); SFRenderWindow.drawShape app shape (); SFRenderWindow.display app; and loop joyd = let get_joystick (((x, y), b) as joyd) = function | SFEvent.JoystickButtonPressed (0, button) -> ((x, y), button::b) | SFEvent.JoystickButtonReleased (0, button) -> ((x, y), remove button b) | SFEvent.JoystickMoved (0, SFJoystick.X, av) -> ((av, y), b) | SFEvent.JoystickMoved (0, SFJoystick.Y, av) -> ((x, av), b) | _ -> joyd in let rec proc_event joyd = match SFRenderWindow.pollEvent app with | Some SFEvent.KeyPressed (SFKey.Escape,_,_,_,_) | Some SFEvent.Closed -> () | Some event -> let joyd = get_joystick joyd event in proc_event joyd | None -> display joyd; loop joyd in proc_event joyd in loop ((0.0, 0.0), [])</lang>
Run with the command:
$ ocaml -I /tmp/ocaml-sfml/src sfml_system.cma sfml_window.cma sfml_graphics.cma joy.ml
Phix
Windows only, taken from http://phix.x10.mx/pmwiki/pmwiki.php?n=Main.JoystickPadLibrary
First, joy.e: <lang Phix>-- Joystick library for Euphoria (Windows) -- /Mic, 2002 -- -- integer joy_init() -- returns the number of joysticks attached to the computer -- -- sequence joy_get_state(integer joy_num) -- returns the current state of joystick #joy_num (can be either 1 or 2). -- the format of the return sequence is: -- {X_direction, Y_direction, Z_direction, buttons} -- the X,Y and Z directions have 3 possible values; 0 (negative), 32768 (neutral) or 65535 (positive) -- the buttons' status are represented by a single bit (button up, button down). e.g. to get the status -- of button #3 on joystick #1 you'd use: -- sequence state -- state = joy_get_state(1) -- if and_bits(state[4],4) then ... end if -- include dll.e include machine.e
constant joyinfo = allocate(32) atom winmm integer joyGetNumDevs,joyGetPos
winmm = open_dll("winmm.dll") if (winmm <= 0) then
puts(1,"Unable to open winmm.dll") abort(0)
end if
joyGetNumDevs = define_c_func(winmm,"joyGetNumDevs",{},C_UINT) joyGetPos = define_c_func(winmm,"joyGetPos",{C_INT,C_POINTER},C_INT) if (joyGetNumDevs<0) or (joyGetPos<0) then
puts(1,"Unable to link functions") abort(0)
end if
global function joy_init()
integer joy1Attached,joy2Attached integer numDevs = c_func(joyGetNumDevs,{}) if numDevs=0 then return 0 end if joy1Attached = (c_func(joyGetPos,{0,joyinfo}) != 167) joy2Attached = (numDevs=2) and (c_func(joyGetPos,{1,joyinfo}) != 167) return joy1Attached + (joy2Attached*2)
end function
global function joy_get_state(integer joy_num)
if joy_num=1 or joy_num=2 then joy_num -= 1 if c_func(joyGetPos,{joy_num,joyinfo+(joy_num*16)}) then -- ERROR return {} end if return peek4u({joyinfo+(joy_num*16),4}) end if return {}
end function</lang> And a test program: <lang Phix>include joy.ew
if joy_init()=0 then
puts(1,"No joystick(s) attached!") abort(0)
end if
sequence joy_info = {}, s integer button_mask
puts(1,"Joystick test\nEntering input loop. Press a key to exit..\n\n")
while get_key()=-1 do
-- Get the state of joystick #1 s = joy_get_state(1) -- Do not print info unless the state has changed if not equal(s,joy_info) then joy_info = s
printf(1,"X = %d, Y= %d ",{floor((s[1]-32767)/32768),floor((s[2]-32767)/32768)})
button_mask = 1 for i=1 to 8 do if and_bits(s[4],button_mask) then printf(1,"BTN%d ",i) else puts(1," ") end if button_mask *= 2 end for puts(1,"\n") end if
end while</lang>
PicoLisp
This is for the 64-bit version.
Note: The code is not yet tested with a real joystick (I don't have one), it was just simulated with dummy functions. Can somebody having a joystick please test it, and remove this message? <lang PicoLisp>(load "@lib/openGl.l")
(setq *JoyX 0.0 *JoyY 0.0)
(glutInit) (glutInitDisplayMode (| GLUT_RGBA GLUT_DOUBLE GLUT_ALPHA GLUT_DEPTH)) (glutInitWindowSize 400 400) (glutCreateWindow "Joystick")
(glClearColor 0.3 0.3 0.5 0)
(displayPrg
(glClear GL_COLOR_BUFFER_BIT) (glBegin GL_LINES) (glVertex2f *JoyX (- *JoyY 0.1)) # Draw crosshair (glVertex2f *JoyX (+ *JoyY 0.1)) (glVertex2f (- *JoyX 0.1) *JoyY) (glVertex2f (+ *JoyX 0.1) *JoyY) (glEnd) (glFlush) (glutSwapBuffers) )
- Track joystick position
(native `*GlutLib "glutJoystickFunc" NIL
(lisp 'joystickFunc '((Btn X Y Z) (msg # Display buttons (make (for (B 1 (n0 Btn) (inc B)) (and (bit? 1 Btn) (link B)) (setq Btn (>> 1 Btn)) ) ) ) (setq # Move crosshair *JoyX (*/ X 1.0 1000) *JoyY (*/ Y 1.0 1000) ) (glutPostRedisplay) ) ) 100 )
- Exit upon mouse click
(mouseFunc '((Btn State X Y) (bye))) (glutMainLoop)</lang>
PureBasic
This is limited to only digital joysticks. <lang PureBasic>If InitJoystick() = 0
MessageRequester("Error!", "Need to connect a joystick", #PB_MessageRequester_Ok) End
EndIf
- some constants for Window positioning
- WindowW = 100: #WindowH = 100
- CrossW = 10
- p1 = (#WindowW - #CrossW) / 2
- p2 = (#WindowW / 2 - #CrossW)
If OpenWindow(0, 0, 0, #WindowW * 2 + 10, #WindowH, "Joystick Position", #PB_Window_SystemMenu)
CreateImage(0, #WindowW, #WindowW) ImageGadget(0, 0, 0, 0, 0, ImageID(0)) TextGadget(2, #WindowW + 5, 10, #WindowW, 20, "Buttons Pressed:") CreateImage(1, #WindowW, 40) ImageGadget(1, #WindowW + 5, 30, 0, 0, ImageID(1)) AddKeyboardShortcut(0, #PB_Shortcut_Escape, 0) Define event, x_movement, y_movement Repeat Repeat event = WindowEvent() Select event Case #PB_Event_Menu If EventMenu() = 0 End EndIf Case #PB_Event_CloseWindow End EndSelect Until event = 0 Define pressed.s, buttonNum, buttonX, buttonY, buttonText.s, buttonColor pressed.s = "" If ExamineJoystick(0) x_movement = JoystickAxisX(0) y_movement = JoystickAxisY(0) StartDrawing(ImageOutput(1)) DrawingMode(#PB_2DDrawing_Transparent) Box(0, 0, #WindowW, 50, RGB($D4, $D0, $C8)) ;a Gray ; check to see if any of the buttons have been pressed For buttonNum = 1 To 10 buttonX = ((buttonNum - 1) * 20 + 10) % #WindowW buttonY = ((buttonNum - 1) / 5) * 20 + 10 If JoystickButton(0, buttonNum) buttonColor = RGB($FF, 0, 0) ;Red Else buttonColor = RGB($80, $80, $80) ;Gray EndIf Circle(buttonX, buttonY, 9, buttonColor) buttonText = Str(buttonNum) DrawText(buttonX - TextWidth(buttonText) / 2, buttonY - TextHeight(buttonText) / 2, buttonText, RGB($FF, $FF, $FF)) ;White Next StopDrawing() SetGadgetState(1, ImageID(1)) EndIf StartDrawing(ImageOutput(0)) Box(0,0, #WindowW, #WindowW, RGB($FF, $FF, $FF)) ;White Line(#p1 + x_movement * #p2, #WindowW / 2 + y_movement * #p2, #CrossW, 1, RGB($FF, 0, 0)) ;Red Line(#WindowW / 2 + x_movement * #p2, #p1 + y_movement * #p2, 1, #CrossW, RGB($FF, 0, 0)) ;Red StopDrawing() SetGadgetState(0, ImageID(0)) Delay(10) Until event = #PB_Event_CloseWindow
Python
<lang Python>import sys import pygame
pygame.init()
- Create a clock (for framerating)
clk = pygame.time.Clock()
- Grab joystick 0
if pygame.joystick.get_count() == 0:
raise IOError("No joystick detected")
joy = pygame.joystick.Joystick(0) joy.init()
- Create display
size = width, height = 600, 600 screen = pygame.display.set_mode(size) pygame.display.set_caption("Joystick Tester")
- Frame XHair zone
frameRect = pygame.Rect((45, 45), (510, 510))
- Generate crosshair
crosshair = pygame.surface.Surface((10, 10)) crosshair.fill(pygame.Color("magenta")) pygame.draw.circle(crosshair, pygame.Color("blue"), (5,5), 5, 0) crosshair.set_colorkey(pygame.Color("magenta"), pygame.RLEACCEL) crosshair = crosshair.convert()
- Generate button surfaces
writer = pygame.font.Font(pygame.font.get_default_font(), 15) buttons = {} for b in range(joy.get_numbuttons()):
buttons[b] = [ writer.render( hex(b)[2:].upper(), 1, pygame.Color("red"), pygame.Color("black") ).convert(), # Get co-ords: ((width*slot)+offset, offset). Offsets chosen # to match frames. ((15*b)+45, 560) ]
while True:
# Pump and check the events queue pygame.event.pump() for events in pygame.event.get(): if events.type == pygame.QUIT: pygame.quit() sys.exit()
# Black the screen screen.fill(pygame.Color("black"))
# Get joystick axes x = joy.get_axis(0) y = joy.get_axis(1)
# Blit to the needed coords: # x*amplitude+(centre offset (window size/2))-(xhair offset (xh size/2)) screen.blit(crosshair, ((x*250)+300-5, (y*250)+300-5)) pygame.draw.rect(screen, pygame.Color("red"), frameRect, 1)
# Get and display the joystick buttons for b in range(joy.get_numbuttons()): if joy.get_button(b): screen.blit(buttons[b][0], buttons[b][1])
# Write the display pygame.display.flip() clk.tick(40) # Limit to <=40 FPS</lang>
Raku
(formerly Perl 6)
Linux only terminal based joystick testing utility. Reads events from the joystick asynchronously, allows a main processing loop if desired. This uses the main loop to check for and compensate for a resized terminal but not really anything else. Hit control-c to exit; needs one extra event from the the joystick to exit completely. Only shows the first 3 axes, no matter how many are available. Tested with an Logitech extreme joystick and an Xbox controller.
<lang perl6>use experimental :pack;
- Joysticks generally show up in the /dev/input/ directory as js(n) where n is
- the number assigned by the OS. E.G. /dev/input/js1 . In my particular case:
my $device = '/dev/input/js0';
my $exit = 0;
my $event-stream = $device.IO.open(:bin); my $js = $event-stream.Supply(:8size);
my %config; # joystick configuration: number of axes and buttons my %event; # global "joystick event"
%config<button>.push: 0;
my $callback = sub { update };
sub get-js-event ( $ev, &callback ) {
exit if $exit; # 32 bit timestamp milliseconds. Allows easy checking for "double-click" button presses %event<timestamp> = $ev.subbuf(0, 4).reverse.unpack('N');
# 16 bit (signed int16) value of current control %event<value> = (my $v = $ev.subbuf(4, 2).unpack('S')) > 32767 ?? -65536 + $v !! $v;
# Two 8 bit integers, current event: control type, and control ID (%event<type>, %event<number>) = $ev.subbuf(6).unpack('CC');
# Process the event if %event<type> +& 128 { # initialing given %event<type> +& 3 { # enumeration of control inputs when 1 { %config<button>.push: %event<number> } when 2 { %config<axis>.push: %event<number> } } } else { # Optional callback subroutine to run every time a js event is received callback }
}
- read events from the joystick driver asynchronously
start react whenever $js { $js.act: { get-js-event($_, $callback) } }
- allow a short delay while driver initializes
sleep .5;
- clean up on exit
signal(SIGINT).tap: {
print "\e[0m", "\n" xx 50, "\e[H\e[J\e[?25hWaiting for one more joystick event...\n"; $exit = 1; exit(0);
}
use Terminal::ANSIColor;
my ($rows, $cols) = qx/stty size/.words; # get the terminal size
my $xhair = '╺╋╸'; my $axis = '█'; my @btext = %config<button>.map: { sprintf( "%2d", $_) }; my @button = @btext.map: {color('bold white on_blue ') ~ $_ ~ color('reset')}; my ($x, $y, $z) = ($rows/2).floor, ($cols/2).floor, 0;
sub update {
given %event<type> { when 1 { # button event given %event<value> { when 0 { @button[%event<number>] = color('bold white on_blue ') ~ @btext[%event<number>] ~ color('reset') } when 1 { @button[%event<number>] = color('bold white on_green') ~ @btext[%event<number>] ~ color('reset') } } } when 2 { # axis events given %event<number> { when 0 { $y = ($cols / 2 + %event<value> / 32767 * $cols / 2).Int max 1 } when 1 { $x = ($rows / 2 + %event<value> / 32767 * $rows / 2).Int max 2 } when 2 { $z = (%event<value> / 32767 * 100).Int } default { } # only using the first 3 axes, ignore ant others } $x min= $rows - 1; $y min= $cols - 1; } } print "\e[H\e[J\e[1;1H"; print " ", join " ", flat @button, "Axis 0: $x", "Axis 1: $y" , "Axis 2: $z%\n"; my $bar = ($z / 100 * $cols / 2).floor; if $bar < 0 { print ' ' x ($bar + $cols / 2).floor, color('bold green') ~ $axis x -$bar ~ color('reset'); } else { print ' ' x $cols / 2, color('bold green') ~ $axis x $bar ~ color('reset'); } print "\e[{$x};{$y}H", color('bold yellow') ~ $xhair ~ color('reset');
}
print "\e[?25l"; # hide the cursor update; # initial update
- Main loop, operates independently of the joystick event loop
loop {
once say " Joystick has {%config<axis>.elems} axes and {%config<button>.elems} buttons"; sleep 1; ($rows, $cols) = qx/stty size/.words;
} </lang>
Tcl
<lang tcl>package require Tk 8.6 package require mkLibsdl
- This code assumes we're dealing with the first pair of axes on the first
- joystick; modern joysticks are complex...
- Callback for all joystick activity
proc display {joyDict} {
global x y buttons message set axis -1 dict with joyDict {
if {$joystick != 0} return if {[info exist button]} { # Handle button presses... set buttons($button) $value set message "Buttons:" foreach b [lsort -integer [array names buttons]] { if {$buttons($b)} { lappend message $b } } } else { # Handle joystick movement... if {$axis == -1} return set value [expr {$value / 32768.0 * 100 + 120}] if {$axis == 0} { set x $value } elseif {$axis == 1} { set y $value } .c coords xhairV $x [expr {$y-5}] $x [expr {$y+5}] .c coords xhairH [expr {$x-5}] $y [expr {$x+5}] $y }
}
}
- Make a GUI
set message "Buttons:" pack [canvas .c -width 240 -height 240] [label .l -textvariable message] set x [set y 120] .c create line {120 115 120 125} -tags xhairV .c create line {115 120 125 120} -tags xhairH joystick event eval {display [joystick event peek]}</lang>
ZX Spectrum Basic
Assuming a Kempston joystick interface, fairly standard at the time. Rewriting for the Sinclair Interface 2 involves changing line 80 to 80 LET t=IN 61438, replacing all numbers in the next five lines with 191-said number and reversing each pair of directions.
<lang zxbasic>10 DIM o$(5) 20 LET xm=0: LET xx=31: REM screen limits 30 LET ym=0: LET yx=18 40 LET xo=16: LET yo=9: REM origin 50 LET xc=xo: LET yc=yo 60 PRINT AT yc,xc;" ": REM entry point for scan loop - blank cursor 70 LET xc=xo: LET yc=yo 80 LET t=IN 31 90 IF t=1 OR t=5 OR t=9 OR t=17 OR t=21 OR t=25 THEN LET xc=xx: LET o$(2)="R": REM right 100 IF t=2 OR t=6 OR t=10 OR t=18 OR t=22 OR t=26 THEN LET xc=xm: LET o$(1)="L": REM left 110 IF t=4 OR t=5 OR t=6 OR t=20 OR t=21 OR t=22 THEN LET yc=yx: LET o$(4)="D": REM down 120 IF t=8 OR t=9 OR t=10 OR t=24 OR t=25 OR t=26 THEN LET yc=ym: LET o$(3)="U": REM up 130 IF t>=16 THEN LET o$(5)="F": REM fire 140 PRINT AT 21,0;"Input:";o$ 150 PRINT AT yc,xc;"+" 160 LET o$=" ": REM five spaces to blank output line again 170 GO TO 60</lang>
- Output:
+ Input:L D
- Programming Tasks
- Joystick
- Hardware
- Applesoft BASIC
- AutoHotkey
- GDIP
- BBC BASIC
- Commodore BASIC
- Delphi
- MmSystem
- Go
- Termbox-go
- Joystick(go)
- GUISS
- Haskell
- IS-BASIC
- Julia
- Liberty BASIC
- Locomotive Basic
- Mathematica
- OCaml
- SFML
- Ocaml-sfml
- Phix
- PicoLisp
- GLUT
- PureBasic
- Python
- Pygame
- Raku
- Tcl
- Tk
- MkLibsdl
- ZX Spectrum Basic
- AWK/Omit
- C sharp/Omit
- Lilypond/Omit
- Lotus 123 Macro Scripting/Omit
- ML/I/Omit
- Maxima/Omit
- Octave/Omit
- PARI/GP/Omit
- R/Omit
- Retro/Omit
- SAS/Omit
- Scilab/Omit
- SQL PL/Omit
- Stata/Omit
- TI-83 BASIC/Omit
- Zkl/Omit