GetSpriteHit Question - GameCreators Forum

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Talairina

18

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Joined: 9th Jan 2006

Location: United Kingdom

Posted: 6th Jan 2012 15:19

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Is there anyway to get the text id used for a sprite when using GetSpriteHit if your using the following way to setup your sprite;

+ Code Snippet

    img_button_end_turn = LoadImage ( "endturn.jpg" )
    spr_button_end_turn = CreateSprite ( img_button_end_turn )
    SetSpritePosition ( spr_button_end_turn, 700, 95 )

The command when used like so;

+ Code Snippet

    Print ( sprite )

    if ( GetPointerPressed ( ) = 1 )
        sprite = GetSpriteHit ( GetPointerX ( ), GetPointerY ( ) )
    endif

Returns the number of the sprite not any text id such as 'spr_button_end_turn' from my previous example. Since this number is assigned by AppGameKit and not yourself it could be anything and would be very difficult to track down if your using say 500-600 sprites at once and need to check for 'touches' on them. If I'm not clear in what I'm asking just say I'll and try and explain better. Lack of coffee and all means I'm prone to mistakes =)

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mr_d

DBPro Tool Maker

17

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Joined: 26th Mar 2007

Location: Somewhere In Australia

Posted: 6th Jan 2012 16:30 Edited at: 6th Jan 2012 16:40

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let me give you 2 answers that I can see for what I think you are trying to do...
1st is that there is the other form of declaring sprites that will give you control of what the number of the sprite actually is, so instead of

+ Code Snippet

    img_button_end_turn = LoadImage ( "endturn.jpg" )
    spr_button_end_turn = CreateSprite ( img_button_end_turn )
    SetSpritePosition ( spr_button_end_turn, 700, 95 )

you could define it as

+ Code Snippet

    img_button_end_turn = LoadImage ( "endturn.jpg" )
    spr_button_end_turn = 1
    CreateSprite ( spr_button_end_turn, img_button_end_turn )
    SetSpritePosition ( spr_button_end_turn, 700, 95 )

so that if the GetSpritHit command returns 1 you know that this is actually "spr_button_end_turn".

Although true, I don't think this is what you are after.
The 2nd answer is to just manage your own sprites in an array
e.g. spritearray[500]
where the index would represent your actual sprite numbers and the content of the array at that index would be the sprite text. so you'd have

+ Code Snippet

    spritenum = 1
    CreateSprite ( spritenum, img_button_end_turn ))
    spritearray[ spritenum ] = "spr_button_end_turn"
    ...
    if ( GetPointerPressed ( ) = 1 )
        spritehit = GetSpriteHit ( GetPointerX ( ), GetPointerY ( ) )
    endif
    print ( spritearray[ spritehit ])

this may get a bit messy if you have hundreds or thousands of sprites, but in principle it should work...
hope I make some sort of sense here

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Marl

13

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Joined: 19th Nov 2011

Location: Bradford, UK

Posted: 6th Jan 2012 17:00 Edited at: 6th Jan 2012 17:11

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So you're looking for a way to return the variable that contains the sprite index of the touched sprite?

I don't think there is a way to do this the way you want.

There are a number of ways around this.

I doubt you would assign 500-600 sprites manually using unique variables (as in your example code), more likely they would be stored in an array, in which case you could loop through the array.

You could assign the sprite indexes yourself, using the alternate format CreateSprite ( index , image), but again you would probably store these in an array.

AGK assigns sprite indexes sequentially so you can use the index itself to calculate an array position - providing you create the sprites in array order.

Array position = Sprite Hit index - First Sprite Index

EDIT: Simultaneous posted with "mr_d" (above) which is why I appear to pretty much repeat what he posted

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