Joy Axis hit?

BlitzMax Forums/BlitzMax Programming/Joy Axis hit?

Robb	(Posted 2006) [#1]

I'm currently setting up my game to support both keyboard and joypad control and so far it’s working flawlessly, save for one thing...

If for example I need to call Keyhit(KEY_UP), I can't see any obvious equivalent command for the joypad, only JoyY()=-1 which is effectively the same as KeyDown(KEY_UP).

Does anyone have any idea of an easy way to make a JoyAxisHit() command that will only register the joystick movement once?

Thanks!

tonyg

(Posted 2006) [#2]

Isn't it Joyhit (pub.freejoy 1.08)?

Robb	(Posted 2006) [#3]

As far as I am aware, Joyhit just works for jostick buttons, not the axis :(

Yan	(Posted 2006) [#4]

Const joyDeadZone# = 0.5

Rem
'You could do something like this instead
	Global joyDeadZone#
	
	For c=1 To 1000
		If Abs(JoyY()) > joyDeadZone Then joyDeadZone = Abs(JoyX())
		If Abs(JoyY()) > joyDeadZone Then joyDeadZone = Abs(JoyY())
	Next

	joyDeadZone :* 1.1 ' Just to be on the safe side
End Rem

Graphics 800, 600, 0

Local ox = 400, oy = 300

Repeat
	ox :+ (JoyXHit() * 40)
	oy :+ (JoyYHit() * 40)
	
	Cls
	SetColor 200, 200, 0
	DrawOval ox - 20, oy - 20, 40, 40
    
	Flip
Until KeyHit(KEY_ESCAPE)

End


Function JoyXHit(port=0)
	Global centered = True
	Local jx# = JoyX(port)
	
	If centered
		If jx# > joyDeadZone#
			centered = False
			Return 1
		ElseIf jx# < -joyDeadZone#
			centered = False
			Return -1
		EndIf
	ElseIf (jx# >= -joyDeadZone#) And (jx# <= joyDeadZone#)
		centered = True		
	EndIf
End Function

Function JoyYHit(port=0)
	Global centered = True
	Local jy# = JoyY(port)
	
	If centered
		If jy# > joyDeadZone#
			centered = False
			Return 1
		ElseIf jy# < -joyDeadZone#
			centered = False
			Return -1
		EndIf
	ElseIf (jy# >= -joyDeadZone#) And (jy# <= joyDeadZone#)
		centered = True		
	EndIf
End Function

Robb	(Posted 2006) [#5]

Awesome! Thanks very much, that's got it sorted :)

Robb	(Posted 2006) [#6]

Actually, this doesn't work correctly...

Const joyDeadZone# = 0.5

Graphics 800, 600, 0

Global jdir$="NOTHING"

Repeat
	
	
	DrawText jdir+" was the last key to be pressed",10,300
	
	If joyxhit()=1 Then jdir="RIGHT"
	If joyxhit()=-1 Then jdir="LEFT"
	If joyyhit()=1 Then jdir="DOWN"
	If joyyhit()=-1 Then jdir="UP"

	Flip
	Cls

Until KeyHit(KEY_ESCAPE)

Function JoyXHit(port=0)
	Global centered = True
	Local jx# = JoyX(port)
	
	If centered
		If jx# > joyDeadZone#
			centered = False
			Return 1
		ElseIf jx# < -joyDeadZone#
			centered = False
			Return -1
		EndIf
	ElseIf (jx# > -joyDeadZone#) And (jx# < joyDeadZone#)
		centered = True		
	EndIf
End Function

Function JoyYHit(port=0)
	Global centered = True
	Local jy# = JoyY(port)
	
	If centered
		If jy# > joyDeadZone#
			centered = False
			Return 1
		ElseIf jy# < -joyDeadZone#
			centered = False
			Return -1
		EndIf
	ElseIf (jy# > -joyDeadZone#) And (jy# < joyDeadZone#)
		centered = True		
	EndIf
End Function

the if Statements only work for the positive values (whichever comes first in the code)....curious. Any ideas on how I can fix that?

Mark1nc

(Posted 2006) [#7]

Maybe just call joyxhit() once, store the returned value and use that in the if statement.

xret = joyxhit()
if xret = 1...
if xret = -1...