A fast, easy to use, free, and community supported 2D game engine
donahue.dylan
Member
i know this has been asked before but i can't find it.
my question is i am trying it position a sprite but it keeps positioning from the center of the sprite but i want it to position from the bottom right corner of the sprite.
also the sprite is 40 X 320
thanks for all of your help
If your using 0.8-x
[sprite setAnchorPoint:ccp(0, 1)];
See the 'AnchorPoint' section (about half way down) on
http://www.cocos2d-iphone.org/wiki/doku.php/release_notes:0_8_rc
for an explanation (its well worth having a thorough read through the wiki).
donahue.dylan
Member
where would i add this in my project??
MENUSCENE.H
#import <UIKit/UIKit.h>
#import "cocos2d.h"
@interface MenuScene : Scene {
Sprite *background;
}
@end
MENUSCENE.M
#import "MenuScene.h"
#import "cocos2d.h"
@implementation MenuScene
- (id) init {
self = [super init];
background = [[Sprite spriteWithFile:@"LTblueBG.png"] retain];
[self addChild: background z:1];
background.position = ccp(460,160);
return self;
}
@end
Anywhere after the sprites created in that method should work, as it'll update the position, even if its set after (again this is from memory, so might not be 100% correct!).
I'd personally put it just before the background.position line, so its easier to read what the codes doing.
Also, I don't think you need to retain the sprite if your using a helper init method like spriteWithFile, as I believe its setup with autorelease. I 'think' you only need to retain when you manually init nodes using alloc.
But whenever you do retain, make sure you release (usually in a dealloc method for instance variables).
Codemattic
Moderator
PhilM, he calls retain bc background is an instance variable and needs to stick around even after MenuScene's -init finishes. If it was a temporary variable it wouldnt be necessary.
"I 'think' you only need to retain when you manually init nodes using alloc."
No, when you alloc and init, the new object is returned to you already retained. Its now your responsibility to release it when you are done with it.
ahh, thanks for correcting me, & sorry for the incorrect advice dylan!
I really need to go back through the memory management docs, for some reason I always seem to get a little bit confused by this aspect. Think its because I'm used to lazy languages like php :-/
I'm off to do some reading.....
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