css3實現橢圓軌跡旋轉

實現效果

X軸Y軸在一個矩形內移動

做斜線運動

 

.ball {
    position: absolute;
    animation: 
      animX 2s linear  infinite alternate,
      animY 2s linear  infinite alternate
  }
@keyframes animX{
      0% {left: 0px;}
    100% {left: 500px;}
}
@keyframes animY{
      0% {top: 0px;}
    100% {top: 300px;}
}

 

設置動畫延時

設置Y軸延時為動畫時長的一半, 運動軌跡變成菱形

 .ball {
    animation: 
      animX 2s linear 0s infinite alternate,
      animY 2s linear -1s infinite alternate
  }

設置三次貝塞爾曲線

 .ball {
    animation: 
      animX 2s  cubic-bezier(0.36, 0, 0.64, 1) -1s infinite alternate,
      animY 2s cubic-bezier(0.36, 0, 0.64, 1) 0s infinite alternate
  }

縮小放大

為了看起來有立體感添加scale屬性,scale動畫應該是X軸和Y軸的時間總和

 .ball1 {
    animation: 
      animX 2s  cubic-bezier(0.36, 0, 0.64, 1) -1s infinite alternate,
      animY 2s cubic-bezier(0.36, 0, 0.64, 1) 0s infinite alternate,
      scale 4s cubic-bezier(0.36, 0, 0.64, 1) 0s infinite alternate;
  }
 @keyframes scale {
 
    0% {
      transform: scale(0.7)
    }
    50% {
      transform: scale(1)
    }
    100% {
      transform: scale(0.7)
   }
 }