Naming Sprites using Variables OR how to use Atlas Sprites????

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Naming Sprites using Variables OR how to use Atlas Sprites????

(10 posts) (6 voices)

Started 8 months ago by FlamingPineapples
Latest reply from FlamingPineapples

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FlamingPineapples
Member
Edit:
i can't find tutorials on Atlas Sprites (Which is what I
should be able to solve my question below).
Could you please help me determine whether Atlas is the way to go, or if another method is better?
Either way - If you could - just point me in the right direction - Tutorials would be the best

Thanks....

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Original Question Below:

I am trying to add a series of sprites named "spritebasic" with a number attached to the end - platforms

In my code I have the following

Sprite * ("spritebasic" + spritenovalue) = [Sprite spriteWithFile:@"spriteblue.png"];

How should I refer to this when I am dealing with the sprite, and how should I unload this?

Or is there an easier way?
I have googled for ages and have come up with Tilemaps - but are unsure how to implement them...

Or is there a better function for this???

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Edit: I think I may have found the answer: AtlasSprites - but from what I have looked at they seem best for animation???

ANY help is appreciated
Posted 8 months ago #
FlamingPineapples
Member

Posted 8 months ago #
bradparks
Member

hey there.... Cocos2d comes with lots of examples itself... Definitely has samples on AtlasSprites.... The "Readme before posting" post mentions how to load any of the examples (must be over 50) that come with Cocos2d....

http://www.cocos2d-iphone.org/forum/topic/3

Here's specifically how to run any of the example code:
http://www.cocos2d-iphone.org/wiki/doku.php/faq?s=drag&s=active&s=target#how_to_run_the_tests

And an AtlasSprite example is in the Cocos2d source.. It's main file is called "AtlasSpriteTest.m"....

And if you're ever trying to find an example for how to do something in Cocos, use the following tip to search the Cocos project:
http://www.cocos2d-iphone.org/forum/topic/3#post-16500

Posted 8 months ago #
Codemattic
Moderator

"I am trying to add a series of sprites named "spritebasic" with a number attached to the end "

let me guess, you come from an Actionscript background? You cant make variable names like that in ObjectiveC, you could use a c array or NSArray or NSDictionary to hold your Sprites and access them that way.

Posted 8 months ago #
Steve Oldmeadow
Administrator

You can also assign a numeric "tag" to a sprite and retrieve the sprite from the node it is added to using that tag so you probably don't even need to do what you think you need to do.

It might help if you give us the big picture of what you are trying to do.

Posted 8 months ago #
Tim
Member

Actually, I think what he's looking for might be something like this:

Sprite *mySprite[5];

Then I add the additional sprites with a loop and incrementing counter...

mySprite[count] = [Sprite spriteWithFile:@"somesprite.png"];

I'll defer to Steve and the guys though cause this may be wrong but this is what I used to create additional sprites on the fly.

Posted 8 months ago #
FlamingPineapples
Member

Basically I am trying to make a platform where the platforms fall from the top and make their way to the bottom - They would start off plenty, then fewer as timed progressed - I would Like to make their positions random.
I am using a timer which ticks every fifth of a second

trsills - I tried that example and all my code does is turn up errors - either im doing something wrong - or it doesn't work (I have defined count as an int... But any reference to mySprite[ANYVariable] comes up with an error...

I'll look into those atlasSprites now - and hope they help me...
Thanks...

Posted 8 months ago #
Kahless
Member

You might want to have a look at the tweejump source code, it sounds similar to what you are trying to achieve.

http://github.com/haqu/tweejump

Posted 8 months ago #

Hmm, what exactly are the errors? I have this working in my app and was lifted from the AccelViewportTest sample code where in the init it has the following:

for (int n=0; n<NUM_GROSSINIS; n++) {
  CGPoint pos = ccp((randfloat())*cloudsSize.x, (randfloat())*cloudsSize.y);
  grossini[n] = [self addNewSpritePosition:pos scale:0.15];
  [grossini[n] runAction:[Repeat actionWithAction:[RotateBy actionWithDuration:.5f*(n%5) angle:(n>NUM_GROSSINIS/2)?360:-360 ] times:100000]];
		}

Posted 8 months ago #

FlamingPineapples
Member

@Kahless Thank You SOO much for that - Just before your post I headed to atlasSprites and that is what this uses...

@trsills - i just left it at that - i can see that the way I was trying to do it was wrong....

Posted 8 months ago #

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