Print Page - How to identify a selected sprite?

Title: How to identify a selected sprite?
Post by: laddsa on 2010-Feb-10

Hi, if I have many sprites on-screen, is it possible to return the sprite id of the sprite that i click on using the mouse?

Thanks,

Laddsa

Title: Re: How to identify a selected sprite?
Post by: Ozden79 on 2010-Feb-10

There is no direct way as far as I know and you can check whether mouse x and y coordinates are within the bounds of any of your sprites. To do this, you'll need to note down the last bounds of your sprites or maybe should check when you calculate where to draw your sprite.

Title: Re: How to identify a selected sprite?
Post by: Kitty Hello on 2010-Feb-10

Again - there is no "sprite". It's a bad naming from day 1 and if should read "blit". You can just draw images at a position. To test for collicion you either use BOXCOLL or SPRCOLL with the coordinates of the sprite's position.

Title: Re: How to identify a selected sprite?
Post by: Schranz0r on 2010-Feb-10

Kitty Hello say all you need...
And its in the wrong forum ;)

Title: Re: How to identify a selected sprite?
Post by: laddsa on 2010-Feb-11

Many thanks guys, I shall try your suggestions.

Title: Re: How to identify a selected sprite?
Post by: Amon on 2010-Feb-12

Quote from: laddsa on 2010-Feb-10
Hi, if I have many sprites on-screen, is it possible to return the sprite id of the sprite that i click on using the mouse?

Thanks,

Laddsa

What I do is the following. If you have say a type with sprite id's you can use mouse math to find which one is clicked. e.g:

Code (glbasic) Select

// --------------------------------- //
// Project: SpriteSelect
// Start: Thursday, February 11, 2010
// IDE Version: 7.250


SETCURRENTDIR("Media") // seperate media and binaries?

SETSCREEN 800,600,0

GLOBAL image = 0
GLOBAL MouseX, MouseY, MB1, MB2
SETTRANSPARENCY RGB(255,0,255)
LOADSPRITE "sprite.png",0
LOADSPRITE "arrow.png",1

GLOBAL tempid = 0
GLOBAL ActualID = -1

TYPE Sprite
	x
	y
	id
ENDTYPE

GLOBAL SpriteArray[] AS Sprite

FOR x = 0 TO 5
	GLOBAL s AS Sprite
	s.x = RND(800)
	s.y = RND(600)
	s.id = tempid
	DIMPUSH SpriteArray[],s
	tempid = tempid + 1
NEXT


WHILE KEY(01) = FALSE

	MOUSESTATE MouseX, MouseY, MB1, MB2
	
	DrawSprites()
	SelectSpriteID()
	
	DRAWSPRITE 1, MouseX, MouseY
	
	SHOWSCREEN
WEND

FUNCTION DrawSprites:
	FOREACH s IN SpriteArray[]
		DRAWSPRITE image,s.x,s.y
	NEXT
ENDFUNCTION

FUNCTION SelectSpriteID:
	FOREACH s IN SpriteArray[]
			IF MouseX - s.x >0 AND MouseX - s.x < 40
				IF MouseY - s.y >0 AND MouseY - s.y < 40
					ActualID = s.id
				ENDIF
			ENDIF
	NEXT
	
	PRINT ActualID,20,20
ENDFUNCTION

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Title: Re: How to identify a selected sprite?
Post by: Schranz0r on 2010-Feb-12

If you have overlapt sprites, then that give some problems :)

@ Laddsa:

You write a Mapeditor right?

Title: Re: How to identify a selected sprite?
Post by: laddsa on 2010-Feb-13

@ Amon:
That worked great! Many thanks for the code! :good:

@Schranz0r:
Not quite sure what a mapeditor is! :(

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Main forum => GLBasic - en => Topic started by: laddsa on 2010-Feb-10