我正在学习关于 simple cocos2d game 的教程.
但是在该教程中,用户发射的子弹仅朝一个方向
我该怎么做才能让它向所有方向发射而不是单向发射?
这里是方向的代码。
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]];
所有帮助将不胜感激。谢谢
最佳答案
假设您在角色所在位置创建射弹,您只需要在计算终点之前弄清楚方向即可。
添加弹丸后:
[self addChild:projectile];
添加标量 float :
float scalarX = 1.0f;
如果触摸是在字符的左侧,则将其设置为负值:
if (offX < 0.0f) scalar = -1.0f;
然后只需将 realX
乘以这个标量,使其指向正确的方向
int realX = scalar * (winSize.width + (projectile.contentSize.width/2));
关于iphone - 射弹/子弹方向 Cocos2d,我们在Stack Overflow上找到一个类似的问题: https://stackoverflow.com/questions/8529581/