弹丸/子弹方向Cocos2d(Projectiles/Bullets direction Cocos2d)

 我正在关注一个简单的cocos2d游戏的教程。 
 
 但是在该教程中，用户触发的子弹只在一个方向上 
 
 我能做些什么来让它在所有方向上发射，而不仅仅是单方面？ 
 
 这是方向的代码。 
 
int offX = location.x - projectile.position.x;
int offY = location.y - projectile.position.y;

[self addChild:projectile];

int realX = winSize.width + (projectile.contentSize.width/2);
float ratio = (float) offY / (float) offX;
int realY = (realX *ratio) + projectile.position.y;
CGPoint realDest = ccp(realX, realY);

int offRealX = realX - projectile.position.x;
int offRealY = realY - projectile.position.y;
float length = sqrtf((offRealX*offRealX)+(offRealY*offRealY));
float velocity = 480/1;
float realMoveDuration = length/velocity;

[projectile runAction:[Sequence actions:[MoveTo actionWithDuration:realMoveDuration position:realDest],
                       [CallFuncN actionWithTarget:self selector:@selector(spriteMoveFinished:)], nil]];
 
 所有的帮助将不胜感激。 谢谢 

i am following a tutorial on a simple cocos2d game.
 
however on that tutorial the bullets that the user fires is only on one direction
 
what can i do to make it fire on all directions not just one sided?
 
here is the code of the direction.
 
int offX = location.x - projectile.position.x;
int offY = location.y - projectile.position.y;

[self addChild:projectile];

int realX = winSize.width + (projectile.contentSize.width/2);
float ratio = (float) offY / (float) offX;
int realY = (realX *ratio) + projectile.position.y;
CGPoint realDest = ccp(realX, realY);

int offRealX = realX - projectile.position.x;
int offRealY = realY - projectile.position.y;
float length = sqrtf((offRealX*offRealX)+(offRealY*offRealY));
float velocity = 480/1;
float realMoveDuration = length/velocity;

[projectile runAction:[Sequence actions:[MoveTo actionWithDuration:realMoveDuration position:realDest],
                       [CallFuncN actionWithTarget:self selector:@selector(spriteMoveFinished:)], nil]];
 
all help will be greatly appreciated. Thanks

原文：https://stackoverflow.com/questions/8529581