Clamp()

BlitzMax Forums/BlitzMax Module Tweaks/Clamp()

JoshK

(Posted 2007) [#1]

I think this function should be added to brl.math. It's very simple and useful:

Function Clamp:Float(val:Float,minimum:Float=0.0,maximum:Float=1.0)
	If val<minimum val=minimum
	If val>maximum val=maximum
	Return val
EndFunction

H&K	(Posted 2007) [#2]

Function Clamp:Float(val:Float,minimum:Float=0.0,maximum:Float=1.0)
	
	Return Min (Max (val,minimum),maximum)

EndFunction

Function Clamp:Float(val:Float,minimum:Float=0.0,maximum:Float=1.0)
	If val<minimum Return minimum
	If val>maximum Return maximum
	Return val
EndFunction

@Lead if you were going to add this to the Brl.maths, would you bother with (for example)

Function Clamp:Float(val:Float,minimum:Float=0.0,maximum:Float=1.0)
?Debug
Assert Minimum<=Maximum,"Minimum not less than Maximum"
?
	Return Min (Max (val,minimum),maximum)

EndFunction

Or do you not bother with that sort of thing?

ziggy

(Posted 2007) [#3]

I would remove the "<=" check and change it to "<".

Michael Reitzenstein

(Posted 2007) [#4]

I would swap them if they're the wrong sign -

If minimum < maximum Return Clamp( val, maximum, minimum )

(not <= for obvious reasons)