问题描述
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我正在尝试构建类似于Canabalt的东西，在建筑物（模块）之间添加孔和不同的高度。您可以在以下位置查看有关游戏外观的屏幕截图：http://twitpic.com/4kb5jd
这是我当前正在使用的代码：
-(id) init
{
// always call \"super\" init
// Apple recommends to re-assign \"self\" with the \"super\" return value
if( (self=[super init] )) {
moduleSize = 160;
screenSize = [[CCDirector sharedDirector] winSize];
CCSpriteFrameCache* frameCache = [CCSpriteFrameCache sharedSpriteFrameCache];
[frameCache addSpriteFramesWithFile:@\"ModulesScene1.plist\"];
CCTexture2D* gameArtTexture = [[CCTextureCache sharedTextureCache] addImage:@\"ModulesScene1.png\"];
// Create the background spritebatch
spriteBatch = [CCSpriteBatchNode batchNodeWithTexture:gameArtTexture];
[self addChild:spriteBatch];
numStripes = 1;
/* BEGIN MODULES */
Nsstring* frameName = [Nsstring stringWithFormat:@\"Module0-hd.png\"];
CCSprite* sprite = [CCSprite spriteWithSpriteFrameName:frameName];
sprite.anchorPoint = CGPointMake(0,0.5f);
sprite.position = CGPointMake(0,screenSize.height / 2);
[spriteBatch addChild:sprite z:0 tag:0];
frameName = [Nsstring stringWithFormat:@\"Module0-hd.png\"];
sprite = [CCSprite spriteWithSpriteFrameName:frameName];
sprite.anchorPoint = CGPointMake(0,0.5f);
sprite.position = CGPointMake((moduleSize - 1.1f),screenSize.height / 2);
[spriteBatch addChild:sprite z:1 tag:1];
frameName = [Nsstring stringWithFormat:@\"Module1-hd.png\"];
sprite = [CCSprite spriteWithSpriteFrameName:frameName];
sprite.anchorPoint = CGPointMake(0,0.5f);
sprite.position = CGPointMake((moduleSize * 2) - 1.1f,screenSize.height / 2);
[spriteBatch addChild:sprite z:2 tag:2];
frameName = [Nsstring stringWithFormat:@\"Module2-hd.png\"];
sprite = [CCSprite spriteWithSpriteFrameName:frameName];
sprite.anchorPoint = CGPointMake(0,0.5f);
sprite.position = CGPointMake(((moduleSize * 3) - 1.1f),screenSize.height / 2);
[spriteBatch addChild:sprite z:3 tag:3];
frameName = [Nsstring stringWithFormat:@\"Module0-hd.png\"];
sprite = [CCSprite spriteWithSpriteFrameName:frameName];
sprite.anchorPoint = CGPointMake(0,0.5f);
sprite.position = CGPointMake(((moduleSize * 4) - 1.1f),screenSize.height / 2);
[spriteBatch addChild:sprite z:4 tag:4];
frameName = [Nsstring stringWithFormat:@\"Module1-hd.png\"];
sprite = [CCSprite spriteWithSpriteFrameName:frameName];
sprite.anchorPoint = CGPointMake(0,0.5f);
sprite.position = CGPointMake(((moduleSize * 5) - 1.1f),screenSize.height / 2);
[spriteBatch addChild:sprite z:5 tag:5];
/* END MODULES */
// Get current scrollSpped
scrollSpeed = [[GameManager sharedGameManager] scrollSpeed];
speedFactors = [[CCArray alloc] initWithCapacity:numStripes];
[speedFactors addobject:[NSNumber numberWithFloat:2.5f]];
NSAssert([speedFactors count] == numStripes,@\"speedFactors count does not match numStripes!\");
[self scheduleUpdate];
}
return self;
}
-(void) update:(ccTime)delta
{
CCSprite* sprite;
scrollSpeed = [[GameManager sharedGameManager] scrollSpeed];
CCARRAY_FOREACH([spriteBatch children],sprite)
{
NSNumber* factor = [speedFactors objectAtIndex:0];
CGPoint pos = sprite.position;
pos.x -= scrollSpeed * [factor floatValue];
if (pos.x < -screenSize.width)
{
pos.x += ((screenSize.width * 2) - 2);
int x = (arc4random() % 3);
int xHole = (arc4random() % 10);
Nsstring *randomName = nil;
CCSpriteFrame *randomFrame = [[CCSpriteFrameCache sharedSpriteFrameCache] spriteFrameByName:randomName];
[sprite setdisplayFrame:randomFrame];
}
sprite.position = pos;
}
}
解决方法
要在建筑物之间添加孔，您可以添加一个简单的rand（）函数，例如init方法中的函数：
...
sprite.position = CGPointMake(((moduleSize * 3) - 1.1f + (rand()%40)),screenSize.height / 2);