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bezier_movement

v1.0.0

Published

This is a JS plugin for dom to realize Bezier curve trace motion

Downloads

3

Readme

bezier_movement

这是一个让元素实现贝塞尔曲线轨迹运动的JS插件

Example

https://maoyonglong.github.io/bezier_movement

Usage

var movement = new BezierMovement(options)

options

默认的配置:

{
  type: 'quadratic', // linear(线性) quadratic(二次曲线), cubic (三次曲线)
  target: undefined, // 必须,运动的对象
  container: document.body, // 包裹的容器,一般指position: relataive的父元素
  start: [], // 必须,运动的起点,形式为[x, y]
  end: [], // 必须,运动的终点
  fixedPoints: [], // 定点,linear - [], quadratic- [[x, y]], cubic - [[x1, y1], [x2, y2]]
  autoPlay: false, // 是否初始化后自动运行
  onEnd: undefined // 回调函数,运行结束后执行
}

显示轨迹

movement.genTrack().toggleTrack(true)

API

  • setOptions 设置options
  • bezier 获取贝塞尔算法函数
  • setCalcT 设置贝塞尔函数的变量t的改变方式

运动在每次requestAnimationFrame时执行,每次执行时计算器count自增1

movement.setCalcT(function (count) {
  return 1 / 30 * count // 这样就表示每次t增加1/30
})
  • play 执行运动
movement.play()
  • genTrack 生成运动轨迹
movement.genTrack()
  • toggleTrack 显示或隐藏运动轨迹
movement.toggleTrack(true) // 显示
movement.toggleTrack(false) // 隐藏
  • removeTrack 移除运动轨迹
movement.removeTrack()

除了bezier,其它API都返回实例本身