Hiding text in select statement - GameCreators Forum

Author

Message

Paronamixxe

AGK Bronze Backer

12

Years of Service

User Offline

Joined: 10th Feb 2012

Location: Sweden

Posted: 4th Dec 2013 23:11 Edited at: 5th Dec 2013 12:52

Link

*RESOLVED*

Hello all! I've hit a rather peculiar snag in which a text is hiding itself when I move to a new case within a select statement. I've pasted the relevant code below. Case 1 does exactly what I want it to do, however, when the "This is the tale of the firestarter" text vanishes and the case is changed to 2 by using

+ Code Snippet

Cutscene_Flag = 2

the text totally vanishes?! Its probably just something small that I'm overlooking, but all help is appreciated!

The code that doesn't work...

Case 1:

SetTextString ( Version_Text , "" )
            SetTextString ( Menu_Quote , "" )
            SetSpriteVisible ( Menu_Black , 0 )
            SetMusicSystemVolume ( Settings_Music_Volume )
            PlayMusic ( Music_Private_Reflection )

Intro_Text = CreateText ( "This is the tale of the firestarter" )
            SetTextSize ( Intro_Text , 64 )
            SetTextPosition ( Intro_Text , GetDeviceWidth ( ) / 2 - GetTextTotalWidth ( Intro_Text ) / 2 , GetDeviceHeight ( ) / 2 - GetTextTotalHeight ( Intro_Text ) / 2 )
            SetTextColorAlpha ( Intro_Text , 0 )

//Fade in
            For i = 1 to 255

SetTextColorAlpha ( Intro_Text , i )
                sync

Next i

//Fade out
            For i = 1 to 255

SetTextColorAlpha ( Intro_Text , 255 - i )
                sync

Next i

Cutscene_Flag = 2

EndCase

Case 2:

SetTextVisible ( Intro_Text , 1 )
            SetTextString ( Intro_Text , "The story of a young boy" )
            SetTextPosition ( Intro_Text , GetDeviceWidth ( ) / 2 - GetTextTotalWidth ( Intro_Text ) / 2 , GetDeviceHeight ( ) / 2 - GetTextTotalHeight ( Intro_Text ) / 2 )

//Fade in
            For i = 1 to 255

SetTextColorAlpha ( Intro_Text , i )
                sync

Next i

//Fade out
            For i = 1 to 255

SetTextColorAlpha ( Intro_Text , 255 - i )
                sync

Next i

Cutscene_Flag = 3

Endcase

+ Code Snippet

Case 1:

            SetTextString ( Version_Text , "" )
            SetTextString ( Menu_Quote , "" )
            SetSpriteVisible ( Menu_Black , 0 )
            SetMusicSystemVolume ( Settings_Music_Volume )
            PlayMusic ( Music_Private_Reflection )

            Intro_Text = CreateText ( "This is the tale of the firestarter" )
            SetTextSize ( Intro_Text , 64 )
            SetTextPosition ( Intro_Text , GetDeviceWidth ( ) / 2 - GetTextTotalWidth ( Intro_Text ) / 2 , GetDeviceHeight ( ) / 2 - GetTextTotalHeight ( Intro_Text ) / 2 )
            SetTextColorAlpha ( Intro_Text , 0 )

            //Fade in
            For i = 1 to 255

                SetTextColorAlpha ( Intro_Text , i )
                sync

            Next i

            //Fade out
            For i = 1 to 255

                SetTextColorAlpha ( Intro_Text , 255 - i )
                sync

            Next i

            Cutscene_Flag = 2

        EndCase

        Case 2:

            SetTextVisible ( Intro_Text , 1 )
            SetTextString ( Intro_Text , "The story of a young boy" )
            SetTextPosition ( Intro_Text , GetDeviceWidth ( ) / 2 - GetTextTotalWidth ( Intro_Text ) / 2 , GetDeviceHeight ( ) / 2 - GetTextTotalHeight ( Intro_Text ) / 2 )

            //Fade in
            For i = 1 to 255

                SetTextColorAlpha ( Intro_Text , i )
                sync

            Next i

            //Fade out
            For i = 1 to 255

                SetTextColorAlpha ( Intro_Text , 255 - i )
                sync

            Next i

            Cutscene_Flag = 3

        Endcase

Mephisto - WIP

Back to top

Profile PM Email

Naphier

14

Years of Service

User Offline

Joined: 2nd Oct 2010

Location: St Petersburg, Florida

Posted: 4th Dec 2013 23:43

Link

I can't see anything wrong with the snippet you posted.
Looks like it would do the following
case 1 --- create text, fade in "This is the tale..." fade out
I assume there is a loop that brings us back to the top of the select statement that you're not showing
Then case 2 -- make text visible, set the new string fade in and then out
Can you show a more complete code snippet? I think the issue is not in these case statements.

Napland Games Facebook Twitter

Back to top

Profile PM Email Website

Rich Dersheimer

AGK Developer

15

Years of Service

User Offline

Joined: 1st Jul 2009

Location: Inside the box

Posted: 5th Dec 2013 01:38

Link

Are you selecting on Cutscene_Flag? Probably not a good idea to change its value inside the case statement. I'm not sure that's the problem, but you should use an exit right after you change the flag.

If you ARE using Cutscene_Flag to just step through the text, then you might consider using something besides select/case.

dersheimer.com

Back to top

Profile PM Email

JimHawkins

15

Years of Service

User Offline

Joined: 26th Jul 2009

Location: Hull - UK

Posted: 5th Dec 2013 10:29

Link

More heavyweight compilers would not let you change the case selector inside a case statement. I don't know if AppGameKit Basic drops through (C style) or will only select one statement (Pascal).

-- Jim - When is there going to be a release?

Back to top

Profile PM Website

Marl

13

Years of Service

User Offline

Joined: 19th Nov 2011

Location: Bradford, UK

Posted: 5th Dec 2013 11:39 Edited at: 5th Dec 2013 11:40

Link

I use select to control program state.

It runs one and only one case statement each pass. I have not had any problems changing the variable mid case - in fact as it's for program state, there is hardly any code not in a case.

+ Code Snippet

Select Core.state
	case CORESTATE_INIT
		Game_Init()
		Menu_Init()
		Core_SetState( APP_STATE_INTRO )
	endcase
	case CORESTATE_EXIT
		exit
	endcase
	case CORESTATE_ERROR
// Error handler
	endcase
	case APP_STATE_INTRO
		// No intro on this app
		Core_SetState( APP_STATE_MENU )
	endcase
	case APP_STATE_MENU
		Menu_Loop()
	endcase
	case APP_STATE_GAME
		Game_Loop()
	endcase
	case default
		// Default Loop
		if getrawkeystate( RAWKEY_ESC ) then Core_SetState( CORESTATE_EXIT )
	endcase
endselect

Back to top

Profile PM Email

JimHawkins

15

Years of Service

User Offline

Joined: 26th Jul 2009

Location: Hull - UK

Posted: 5th Dec 2013 11:59

Link

I just looked at the AppGameKit docs and they do not say whether case statements drop through or not. This rather important information!

-- Jim - When is there going to be a release?

Back to top

Profile PM Website

Ancient Lady

Valued Member

20

Years of Service

User Offline

Joined: 17th Mar 2004

Location: Anchorage, Alaska, USA

Posted: 5th Dec 2013 12:27

Link

Just a comment on what others have said about changing the value of the case selector variable. I do it all the time and have never had any compiler complain. Once the case has been selected based on the value when the switch statement is encountered and the endcase is reached (or break or whatever appropriate to the language), the processing drops to the end of the select/switch block. In all compilers (unless you have code errors like missing the end case for the language {way too many times I've lost the 'break' line}) only one case is ever selected and executed. That is the way the system is designed.

Paronamixxe, assuming that you are using Cutscene_Flag as the selector, are you running a larger loop that goes back and does the select again? Or are you assuming that the code does fall through and executes the next case after the first one is done (setting Cutscene_Flag to 3)?

Can you show the code around the select/endselect block?

Cheers,
Ancient Lady
AGK Community Tester and AppGameKit Master

Back to top

Profile PM

Paronamixxe

AGK Bronze Backer

12

Years of Service

User Offline

Joined: 10th Feb 2012

Location: Sweden

Posted: 5th Dec 2013 12:51

Link

I have to agree with Ancient Lady and Marl, I use Select Statements regularly to build the backbone of my games, I find the structure really good to work with when it comes to building menus and I've never had a problem with it.

For the record, I fixed the problem... I literally had a completely black sprite covering the screen, and thus my text... So all I had to do was add

+ Code Snippet

SetSpriteVisible ( Menu_Black , 0 )

and everything works as it should. Noob mistake, sorry guys

Mephisto - WIP

Back to top

Profile PM Email

Ancient Lady

Valued Member

20

Years of Service

User Offline

Joined: 17th Mar 2004

Location: Anchorage, Alaska, USA

Posted: 5th Dec 2013 13:33

Link

If only all problems were that simple!

Good luck and Happy Programming!

Cheers,
Ancient Lady
AGK Community Tester and AppGameKit Master

Back to top

Profile PM

Paronamixxe

AGK Bronze Backer

12

Years of Service

User Offline

Joined: 10th Feb 2012

Location: Sweden

Posted: 5th Dec 2013 13:42

Link

IKR!

haha, thanks!

Mephisto - WIP

Back to top

Profile PM Email

Paronamixxe

AGK Bronze Backer

12

Years of Service

User Offline

Joined: 10th Feb 2012

Location: Sweden

Posted: 5th Dec 2013 13:42

Link

oh, and good luck with the move AL!

Mephisto - WIP

Back to top

Profile PM Email

BatVink

Moderator

21

Years of Service

User Offline

Joined: 4th Apr 2003

Location: Gods own County, UK

Posted: 5th Dec 2013 19:48

Link

Quote: "More heavyweight compilers would not let you change the case selector inside a case statement."

I use this method in all of my programs to drive my state machine approach. Wrap it up in a loop as others have mentioned, and it will run just one CASE each iteration.

I don't know if this makes AppGameKit right or wrong, but it works well for me

. I have used this approach in VB and .NET before too.

ten-net consulting limited

Back to top

Profile PM Email

Sorry your browser is not supported!

AppGameKit Classic Chat / Hiding text in select statement