动画曲线 EaseIn | EaseOut |EaseInOut 数学模型分析

#define pow2(x) ((x)*(x)) #define pow3(x) ((x)*(x)*(x)) // assuming : // t is a value between 0 and 1 // b is an offset // c is the height public double easeIn (double t, double b, double c) {   return c*pow3(t) + b; } public double easeOut (double t, double b, double c) {   return c*(pow3(t-1) + 1) + b; } public double easeInOut (double t, double b, double c) { if ( (t*2) < 1)   return c/2*pow3(t*2) + b; else   return c/2*(pow3(t*2-2) + 2) + b; }

一套tween算法代码 : http://monw3c.blogbus.com/logs/57106239.html

  

    

  
  

    
 
    

  


  
 Tween类型： 

    
      
      Linear 
    
      
      Quadratic 
    
      
      Cubic 
    
      
      Quartic 
    
      
      Quintic 
    
      
      Sinusoidal 
    

    
      
      Exponential 
    
      
      Circular 
    
      
      Elastic 
    
      
      Back 
    
      
      Bounce 
  
  
 ease类型： 

    
      
      easeIn 
    
      
      easeOut 
    
      
      easeInOut 
  
  
  

算法分析 ： 

http://www.cnblogs.com/mrsunny/archive/2011/06/21/2086080.html