GETJOYSTICK
Reads buttons and axis information from attached gaming devices
Syntax:
declare function Getjoystick ( byval id as long, byref buttons as integer = 0, byref a1 as single = 0, byref a2 as single = 0, byref a3 as single = 0, byref a4 as single = 0, byref a5 as single = 0, byref a6 as single = 0, byref a7 as single = 0, byref a8 as single = 0 ) as long
Usage:
result = Getjoystick( id[, buttons[, a1[, a2[, a3[, a4[, a5[, a6[, a7[, a8]]]]]]]]] )
Parameters:
id
the device id number (0 - 15)
buttons
the button status
a1
first axis value
a2
second axis value
a3
third axis value
a4
fourth axis value
a5
fifth axis value
a6
sixth axis value
a7
seventh axis value
a8
eighth axis value
Return Value:
0 on success or 1 on failure. All of the axis positions are returned in floating point format.
Description:
Getjoystick will retrieves the button state, and the axis positions for up to 8 axes, for the joystick determined by id, a number between 0 and 15. Buttons are stored in a similar manner to Getmouse, with each bit in buttons representing a button.
A single precision value between -1.0 and 1.0 is returned for each valid axis. If the axis does not exist for the controller, a value of -1000.00 is returned.
Getjoystick will return 0 upon successful completion; It will return 1 upon failure. Failure can be caused by specifying an illegal joystick number, specifying a joystick which doesn't exist, or a failure in the joystick API.
The error code returned by Getjoystick can be checked using Err in the next line. The function version of Getjoystick returns directly the error code as a 32 bit Long.
A single precision value between -1.0 and 1.0 is returned for each valid axis. If the axis does not exist for the controller, a value of -1000.00 is returned.
Getjoystick will return 0 upon successful completion; It will return 1 upon failure. Failure can be caused by specifying an illegal joystick number, specifying a joystick which doesn't exist, or a failure in the joystick API.
The error code returned by Getjoystick can be checked using Err in the next line. The function version of Getjoystick returns directly the error code as a 32 bit Long.
Examples:
Screen 12
Dim x As Single
Dim y As Single
Dim buttons As Integer
Dim result As Long
Dim a As Integer
Const JoystickID = 0
'This line checks to see if the joystick is ok.
If GetJoystick(JoystickID,buttons,x,y) Then
Print "Joystick doesn't exist or joystick error."
Print
Print "Press any key to continue."
Sleep
End
End If
Do
result = GetJoystick(JoystickID,buttons,x,y)
Locate 1,1
Print ;"result:";result;" x:" ;x;" y:";y;" Buttons:";buttons,"","",""
'This tests to see which buttons from 1 to 27 are pressed.
For a = 0 To 26
If (buttons And (1 Shl a)) Then
Print "Button ";a;" pressed. "
Else
Print "Button ";a;" not pressed."
End If
Next a
Loop
Dim x As Single
Dim y As Single
Dim buttons As Integer
Dim result As Long
Dim a As Integer
Const JoystickID = 0
'This line checks to see if the joystick is ok.
If GetJoystick(JoystickID,buttons,x,y) Then
Print "Joystick doesn't exist or joystick error."
Print "Press any key to continue."
Sleep
End
End If
Do
result = GetJoystick(JoystickID,buttons,x,y)
Locate 1,1
Print ;"result:";result;" x:" ;x;" y:";y;" Buttons:";buttons,"","",""
'This tests to see which buttons from 1 to 27 are pressed.
For a = 0 To 26
If (buttons And (1 Shl a)) Then
Print "Button ";a;" pressed. "
Else
Print "Button ";a;" not pressed."
End If
Next a
Loop
- Not available in the -lang qb dialect unless referenced with the alias __Getjoystick.
Differences from QB:
- New to FreeBASIC
See also:
Back to User Input Functions
