Cocos Creator 计算两点角度、距离

1 // 距离
2 getDistance:function(start, end){
3         var pos = cc.v2(start.x - end.x, start.y - end.y);
4         var dis = Math.sqrt(pos.x*pos.x + pos.y*pos.y);
5         return dis;
6     },

 1 // 角度
 2 getAngle:function(start, end){
 3         //计算出朝向
 4         var dx = end.x - start.x;
 5         var dy = end.y - start.y;
 6         var dir = cc.v2(dx,dy);
 7     
 8         //根据朝向计算出夹角弧度
 9         var angle = dir.signAngle(cc.v2(1,0));
10     
11         //将弧度转换为欧拉角
12         var degree = angle / Math.PI * 180;
13 
14         return -degree
15     },