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Transition

What is Transition?

It is a dynamic effect plugin based on Bezier Curve.
It provides common easing curve.
Customizable easing curve.

How is the animation produced?

Get one frame data of the animation.
Draw this frame animation.
Repeat...

We can use three sets of data to describe an animation (animation start state, animation end state, easing curve).Based on these three sets of data, we can calculate the state of each frame of the animation,this is what Transition provided.According to the data of each frame, we carry out continuous redrawing, and the animation is generated.

Install with npm

$ npm install @jiaminghi/transition

Use

import { transition, injectNewCurve } from '@jiaminghi/transition'

// do something

Quick experience

<!--Resources are located on personal servers for experience and testing only, do not use in production environments-->
<!--Debug version-->
<script src="http://lib.jiaminghi.com/transition/transition.map.js"></script>
<!--Compression version-->
<script src="http://lib.jiaminghi.com/transition/transition.min.js"></script>
<script>
  const { transition, injectNewCurve } = window.transition
  // do something
</script>

Detailed documents and examples can be viewed on the HomePage.

Annotation
Examples
Extend New Easing Curve
Easing Curve Table

Annotation

/**
 * @description Get the N-frame animation state by the start and end state
 *              of the animation and the easing curve
 * @param {String|Array} tBC               Easing curve name or data
 * @param {Number|Arrya|Object} startState Animation start state
 * @param {Number|Arrya|Object} endState   Animation end state
 * @param {Number} frameNum                Number of Animation frames
 * @param {Boolean} deep                   Whether to use recursive mode
 * @return {Array} State of each frame of the animation
 */
function transition (tBC, startState = false, endState = false, frameNum = 30, deep = false) {  // ...
}

Examples

Transition provides three data types to describe the animation state.

Number
Array
Object
Recursive

Number

import transition from '@jiaminghi/transition'

const beginState = 0
const endState = 100

const animationState = transition('linear', beginState, endState, 10)

/**
 * animationState = [
 *   0, 11.03429355281208, 22.126200274348417, 33.259259259259245, 44.41700960219478,
 *   55.58299039780521, 66.74074074074073, 77.87379972565157, 88.96570644718793, 100
 * ]
 * /

Array

import transition from '@jiaminghi/transition'

const beginState = [10, 20, 30]
const endState = [100, 200, 300]

const animationState = transition('linear', beginState, endState, 10)

/**
 * animationState = [
 *   [10, 20, 30],
 *   [32.415625, 64.83125, 97.24687499999999],
 *   [55, 110, 165],
 *   [77.58437500000001, 155.16875000000002, 232.753125],
 *   [100, 200, 300]
 * ]
 * /

Object

import transition from '@jiaminghi/transition'

const objectBeginState = { x: 10, y: 10, r: 5}
const objectEndState = { x: 100, y: 10, r: 5}

const animationState = transition('linear', objectBeginState, objectEndState, 5)

/**
 * animationState = [
 *   {x: 10, y: 10, r: 5},
 *   {x: 32.415625, y: 10, r: 5},
 *   {x: 55, y: 10, r: 5},
 *   {x: 77.58437500000001, y: 10, r: 5},
 *   {x: 100, y: 10, r: 5}
 * ]
 * /

Recursive

Use recursive mode to calculate deep data in Array or Object.

import transition from '@jiaminghi/transition'

const beginState = {
  points: [ [10, 30], [20, 80] ],
  origin: { x: 10, y: 20 },
  radius: 3
}

const endState = {
  points: [ [100, 230], [120, 10] ],
  origin: { x: 100, y: 200 },
  radius: 9
}

const animationState = transition('linear', beginState, endState, 3, true)

/**
 * animationState = [
 *   {
 *     origin: { x: 10, y: 20 },
 *     points: [ [10, 30], [20, 80] ],
 *     radius: 3
 *   },
 *   {
 *     origin: { x: 55, y: 110 },
 *     points: [ [55, 130], [70, 45] ],
 *     radius: 6
 *   },
 *   {
 *     origin: { x: 100, y: 200 },
 *     points: [ [100, 230], [120, 10] ],
 *     radius: 9
 *   }
 * ]
 * /

Notice

Non-Number attribute or element does not participate in calculations.
The data type of the start and end state should be consistent（Including the number of attributes and elements）.

Extend New Easing Curve

If you want to extend the new easing curve, you can use the injectNewCurve method provided by Transition to extend.

import { injectNewCurve } from '@jiaminghi/transition'

const curveName = 'linear'

// Can be obtained by drawing tools
const bezierCurve = [[[0, 1]],[[1, 0]]]

injectNewCurve(curveName, bezierCurve)