我正在关注simple cocos2d game。
的教程然而,在该教程中,用户触发的子弹仅在一个方向上
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]];
所有帮助将不胜感激。感谢
答案 0 :(得分:4)
假设您正在角色的位置创建射弹,您只需要在计算终点之前找出方向。
添加射弹后:
[self addChild:projectile];
添加标量浮点数:
float scalarX = 1.0f;
如果该字符留下了触摸,则将其设为负数:
if (offX < 0.0f) scalar = -1.0f;
然后将realX
乘以此标量,使其指向正确的方式
int realX = scalar * (winSize.width + (projectile.contentSize.width/2));