Databases
StackOverflow2013
Postsdbo
PO
 

Note that there are some explanatory texts on larger screens.

plurals
  1. PO
    primarykey
    data
    text
    <p>every time you call 'shootTheBullets', you are replacing the pointer that 'bullet' points to, which I would guess is why your content size reports 0, as the pointer is no longer pointing to the original object. You should be collecting your bullets in an array or similar and iterating through those to see if the bounding boxes intersect with your character.</p> <p>edit:</p> <p>I'm not sure why you'd be given a CCNode back when you put in a CCSprite, but in any case, here's a simple snippet of your basic requirement -- bullets, a character, bullet damage, character damage.</p> <p>Disclaimer: It's for cc2d 1.1, non-ARC . It's what I have handy right now.</p> <p><strong>Bullet.h</strong></p> <pre><code>#import "CCSprite.h" @interface Bullet : CCSprite { float damage; CGPoint velocity; } @property float damage; @property CGPoint velocity; +(Bullet *) bulletWithDamage:(float) damage andVelocity:(CGPoint) velocity; @end </code></pre> <p><strong>Bullet.m</strong></p> <pre><code>#import "Bullet.h" @implementation Bullet @synthesize damage, velocity; +(Bullet *) bulletWithDamage:(float) damage andVelocity:(CGPoint) velocity { Bullet *bullet = [[[self alloc] initWithFile:@"Icon.png"] autorelease]; bullet.damage = damage; bullet.velocity = velocity; bullet.scale = 0.2f; return bullet; } -(id) init { if( (self = [super init]) ) {} return self; } @end </code></pre> <p><strong>PlayTest.h</strong></p> <pre><code>#import "cocos2d.h" @interface PlayTest : CCLayer { NSMutableArray *bullets; CCSprite *character; CGSize winSize; } @end </code></pre> <p><strong>PlayTest.m</strong></p> <pre><code>#import "PlayTest.h" #import "Bullet.h" @implementation PlayTest -(id) init { if( (self=[super init])) { winSize = [CCDirector sharedDirector].winSize; bullets = [[NSMutableArray alloc] initWithCapacity: 10]; character = [CCSprite spriteWithFile:@"Icon.png"]; character.position = ccp(winSize.width/3.4f, winSize.height/2.0f - 100.0f); [self addChild:character z:-3]; [self schedule:@selector(shootTheBullets:) interval:1.0f repeat: 10 delay: 3.0f]; [self scheduleUpdate]; } return self; } -(void)shootTheBullets:(ccTime)delta{ float randX = CCRANDOM_0_1() * 0.5f; Bullet *b = [Bullet bulletWithDamage:5.0f andVelocity:ccp( randX, -1.0f)]; b.position = ccp(40.0f, winSize.height); [bullets addObject:b]; [self addChild: b]; } -(void) update:(ccTime)dt { [self moveTheBullets]; [self checkCollisions]; } -(void) moveTheBullets { for (int i=0; i&lt; bullets.count; i++) { Bullet *b = (Bullet *)[bullets objectAtIndex:i]; b.position = ccpAdd(b.position, b.velocity); } } -(void) checkCollisions { NSMutableArray *collisions = [NSMutableArray arrayWithCapacity:10]; BOOL characterHit = NO; for (int i=0; i&lt; bullets.count; i++) { Bullet *b = (Bullet *)[bullets objectAtIndex:i]; if(CGRectIntersectsRect(character.boundingBox, b.boundingBox) ) { NSLog(@"bullet collision with character"); [collisions addObject: b]; characterHit = YES; } else if (b.position.y &lt; 0.0f) { NSLog(@"bullet went off screen without hitting anything"); [collisions addObject: b]; b.damage = 0.0f; } } for (int i=0; i&lt; collisions.count; i++) { Bullet *b = (Bullet *)[collisions objectAtIndex:i]; // you could damage the character here, something like: // characterDamage -= b.damage [self removeChild:b cleanup:YES]; [bullets removeObject: b]; NSLog(@"bullets count is %d", bullets.count); } if(characterHit) // show character got damaged { if( ![character numberOfRunningActions]) { id one = [CCActionTween actionWithDuration:0.1f key:@"opacity" from:255 to:128]; id two = [CCActionTween actionWithDuration:0.1f key:@"opacity" from:128 to:255]; id onetwo = [CCSequence actions: one, two, nil]; [character runAction: onetwo]; } } } -(void) dealloc { [bullets release]; [super dealloc]; } @end </code></pre>
    singulars
    1. This table or related slice is empty.
    1. POcocos2d sprite collision detection, one sprite sometimes has a contentSize.width of 0.000000
      singulars
      1. PTQuestion
    1. PTAnswer
    1. USMark
    1. USMark
    plurals
    1. This table or related slice is empty.
    1. This table or related slice is empty.
    1. POcocos2d sprite collision detection, one sprite sometimes has a contentSize.width of 0.000000
      singulars
      1. PTQuestion
    1. This table or related slice is empty.
    1. VO
      singulars
      1. PO
      1. This table or related slice is empty.
      1. VTAcceptedByOriginator
    2. VO
      singulars
      1. PO
      1. This table or related slice is empty.
      1. VTUpMod
    1. COHello, I added an array called arrayOfBullets and wrote [arrayOfBullets addObject:bullet]; after [bullet runAction: bulletMoveLeft]; in the shootTheBullets method. Then i added for (bullet in arrayOfBullets){ before the if statement in the testForBulletCollision method, but I am still getting the same results. What am I doing wrong??
      singulars
      1. PO
      1. USPoKoBros
    2. COhard to tell without seeing more code.. are you removing bullets somewhere else, not just setting them to 'visible=NO'? and did you get rid of the ivar 'bullet' ?
      singulars
      1. PO
      1. USMark
    3. COI am not removing any bullets, just creating them, doing the CCAction to them, adding them to the array, and then iterating through the array to find if any bullets collide. My output is the same. Is all the code I have ok??
      singulars
      1. PO
      1. USPoKoBros
 

Querying!

 
Guidance
A row detail

Detail views are divided into sections. All the information in the data section comes from columns in the selected row. The other sections display data from other, related rows.

Related data can be related in a to-one or a to-many fashion. Captions of data related in a to-many fashion link to a list view showing a filtered view of the table.

Try moving around until you find a non-empty to-many entry and click on the label to get to one. You can move back to the root by clicking on the database name in the header.

SQuiL has stopped working due to an internal error.

If you are curious you may find further information in the browser console, which is accessible through the devtools (F12).

Reload