text: //
  //  MathTool.h
  //  Animation
  //
  //  Created by chenfeng on 2018/12/29.
  //  Copyright © 2018年 chenfeng. All rights reserved.
  //
  
  #import <Foundation/Foundation.h>
  
  @interface MathTool : NSObject
  
  //圆心到点的距离>或<半径
  + (BOOL)point:(CGPoint)point inCircleRect:(CGRect)rect;
  //圆心相同，计算起始点和终止点的弧度
  + (float)radiansToDegreesFromPointX:(CGPoint)start ToPointY:(CGPoint)end ToCenter:(CGPoint)center;
  
  @end
  
  
  