Hello again after awhile.

Blitz3D Forums/Blitz3D Beginners Area/Hello again after awhile.

Kenshin Yurihara

(Posted 2010) [#1]

I hate returning only to ask questions and what not, but with school and all I've had very little time to work with any programming(also been trying to learn C++ so more like little time with Blitz). Anyway, I've started a little project which will help myself or others(if I release it publicly) with such things as GUI and effects. Anyway putting all of that aside, I have one simple question...how do I make parameters in a function optional? I don't really use functions often(as you can tell), but I need them now to call the use of the GUIs and Effects. Thanks.

Nike	(Posted 2010) [#2]

You dont need anything inside a function, you can just do Function thing(), or Function thing(hi), but you dont have to use hi in the function. For GUI, I use a basic function I made up:

Function mouseclick(buttonname$,buttonx,buttony)

If ImagesOverlap(mouse,MouseX(),MouseY(),buttonname$,buttonx,buttony)
If MouseDown(1)
Return True 
Else 
Return False 
EndIf
EndIf

End Function

You need mouse to be a pic (Global mouse = loadimage("mouse.bmp"))

To use you would do something like:

mouseclick(credits,360,370)
If mouseclick(credits,360,370) = True
gamecredits()
EndIf

Hope this helps

Last edited 2010

Last edited 2010

Gabriel

(Posted 2010) [#3]

To make parameters optional, give them default values:

Function DoSomething(A,B=1,C$="Blah")
End Function

DoSomething(9)
DoSomething(9,2)
DoSomething(9,2, "Not Blah")

Matty

(Posted 2010) [#4]

Gabriel's answer is what you are after.

Kenshin Yurihara

(Posted 2010) [#5]

Agreed, thanks you guys.