A fast, easy to use, free, and community supported 2D game engine
Hy, I'm a newby....and I try to make a memory game. But after quite a few versions... I'm still stuck.
I can't find the beginning and the logic to apply.
- How can I pick randomly 6 pairs of cards in a bunch of 24 cards?
I have of course some other problems..... but it will be a great help!!!
Hi, this is my way:
...
NSMutableArray * cards = [[NSMutableArray alloc] initWithObjects:nil];
int numberOfAvaiblesCardImages = 20;
int numberOfCardsInTheGame = 24;
for (int a=0; a< numberOfCardsInTheGame / 2; a++)
{
int r = -1;
bool tryAgain = true;
while (tryAgain==true)
{
tryAgain = false;
r = (arc4random() % numberOfAvaiblesCardImages)+1;
for (int i = 0; i < [cards count]; i++) {
int e = [[cards objectAtIndex:i]intValue];
if (e==r) {
tryAgain=true;
}
}
if ([cards count]==0)
{
tryAgain=false;
}
}
[cards insertObject:[NSNumber numberWithInt:r] atIndex:(a*2)];
[cards insertObject:[NSNumber numberWithInt:r] atIndex:1+(a*2)];
}
for(NSUInteger i = [cards count]; i > 1; i--) {
NSUInteger j = random_below(i);
[cards exchangeObjectAtIndex:i-1 withObjectAtIndex:j];
}
....At this point you have a NSMutableArray with numberOfCardsInTheGame / 2 pair of card...
The method "random_below" is:
static NSUInteger random_below(NSUInteger n) {
NSUInteger m = 1;
// Compute smallest power of two greater than n.
// There's probably a faster solution than this loop, but bit-twiddling
// isn't my specialty.
do {
m <<= 1;
} while(m < n);
NSUInteger ret;
do {
ret = random() % m;
} while(ret >= n);
return ret;
}I hope this can help you.
Nando
I'll try that.
Thanks so much for your help!!!!!!!
Everything seems good....but know I can't figure out how to call my sprites from my sprite atlas with that.......
Ok, for example you can rename your images:
img_1.png
img_2.png
img_3.pngand if you have a loop, you can:
for (int counter=0; counter<6; counter++)
{
int r = [[cards objectAtIndex:counter]intValue];
CCSprite* currentCard = [CCSprite spriteWithFile:[NSString stringWithFormat:@"img_%d.png",r]];
....
....
}let me know
I'm not sure about what you mean here by "loop"
zaaroth
Member
This hints to the real problem. Unless you want to pair program with someone on the forum you will have to read a lot of manuals and tutorials in both programming and objective-c.
Take a look at http://www.cocos2d-iphone.org/forum/topic/24794. There someone in more or less the same situation as you asks how to do stuff. There are some good tips on that thread.
I know I have a lot to learn....but I'm on it.
Thank you so much for your help!!!!!
I try and It's working!!!!!! But I have still a problem, sometimes I have more than one pair of same cards.
I probably done a little mistake....I tried a lot of ways....but still the same problem.
static NSUInteger random_below(NSUInteger n) {
NSUInteger m = 1;
do {
m <<= 1;
} while (m < n);
NSUInteger ret;
do {
ret = random() % m;
} while (ret >= n);
return ret;
}
- (void)memory12Cards
{
[self createObjectOfType:kCardType1];
[self createObjectOfType:kCardType2];
[self createObjectOfType:kCardType3];
[self createObjectOfType:kCardType4];
[self createObjectOfType:kCardType5];
[self createObjectOfType:kCardType6];
}
- (void)createObjectOfType:(MemoryObjectType)objectType
{
NSMutableArray *cards = [[NSMutableArray alloc] initWithObjects:nil];
int numberOfAvailablesCardImages = 24;
int numberOfCardInTheGame = 12;
for (int a = 0; a < numberOfCardInTheGame/2; a++) {
int randomCard = -1;
bool tryAgain = true;
while (tryAgain == true) {
tryAgain = false;
randomCard = (random() % numberOfAvailablesCardImages) +1;
for (int i = 0; i < [cards count]; i++) {
int e = [[cards objectAtIndex:i] intValue];
if (e == randomCard) {
tryAgain = true;
}
}
if ([cards count] == 0) {
tryAgain = false;
}
}
[cards insertObject:[NSNumber numberWithInt:randomCard] atIndex:(a*2)];
[cards insertObject:[NSNumber numberWithInt:randomCard] atIndex:1+(a*2)];
}
for (NSUInteger i = [cards count]; i > 1; i--) {
NSUInteger j = random_below(i);
[cards exchangeObjectAtIndex:i-1 withObjectAtIndex:j];
}
for (int counter = 0; counter < numberOfCardInTheGame; counter++) {
int randCard = [[cards objectAtIndex:counter] intValue];
if (kCardType1 == objectType) {
MemoryCard *memoryCard1 = [[MemoryCard alloc] initWithSpriteFrameName:[NSString stringWithFormat:@"carte%d.png", randCard]];
MemoryCard *memoryCard1Double = [[MemoryCard alloc] initWithSpriteFrameName:[NSString stringWithFormat:@"carte%d.png", randCard]];
memoryCard1.position = ccp(218, 617);
memoryCard1Double.position = ccp(592, 384);
[sceneSpriteBatchNode addChild:memoryCard1 z:50 tag:kCard1TagValue];
[sceneSpriteBatchNode addChild:memoryCard1Double z:50 tag:kCard1DoubleTagValue];
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