PushState

[Kitty Hello]

Hi,

I wanted to implement a function "PUSHSTATE" that allows you to push/pop the state variables you can set with GLBasic.

I found the ones below. Did I miss something? Do you think the current directory (or any other variable) should not be bothered?

vpx, vpy, vpw, vph // viewport size (GETVIEWPORT)
smoothshading
usescreen
currentdir
font
orientation

[bigsofty]

So do these state variables replace their function calls?

[MrTAToad]

All sprite commands ?

[Kitty Hello]

no replace. Just...

Code (glbasic) Select Expand


PUSHSTATE
CallFunctionThatChangesViewportOrAnything()
POPSTATE
ContinueYourWork()


[MrTAToad]

Is it actually needed though ?

[Kitty Hello]

yes. Like x_pushmartix. Its mainly for external libraries or so...

[Slydog]

I like the idea! 
Great for creating generic libraries.

How about 'ALPHAMODE' too?

[Slydog]

Ocean, you could use a custom type for doing that, such as: (untested!)

Code (glbasic) Select Expand

TYPE TPushVariable
name$
value#
ENDTYPE

TYPE TPushStack
stack[] AS TPushVariable

FUNCTION Clear:
DIM self.stack[0]
ENDFUNCTION

FUNCTION Push: name$, value#
LOCAL pushVar AS TPushVariable
pushVar.name$ = name$
pushVar.value = value
DIMPUSH self.stack[], pushVar
ENDFUNCTION

FUNCTION Pop#: name$
LOCAL ix%
LOCAL value#
FOR ix = 0 TO LEN(self.stack[])-1
IF self.stack[ix].name$ = name$
value = self.stack[ix].value
DIMDEL self.stack[], ix
RETURN value
ENDIF
ENDIF
RETURN 0 // Not found
ENDFUNCTION

ENDTYPE
GLOBAL pushStack AS TPushStack


Usage:

Code (glbasic) Select Expand

pushStack.Clear()
pushStack.Push("ORIENTATION", GETORIENTATION())
pushStack.Push("TIME", GETTIMERALL())
pushStack.Push("ORIENTATION", GETORIENTATION())
time = pushStack.Pop("TIME")
orientation = pushStack.Pop("ORIENTATION")
orientation = pushStack.Pop("ORIENTATION")


But it's limited to integers and floats.  Could use all strings and convert it to and from I suppose.
I would LOVE function overloading for times like this!

[hardyx]

Did I miss something? Do you think the current directory (or any other variable) should not be bothered?

settransparency
setfont

IMHO current directory must to be managed by the library, if is needed.