使用StateModifier在famousJS中实现无限动画

Question

我想要一个像心脏一样的圆圈，一个脉冲动画。因此，圆首先扩展到75％，然后扩展到100％。我想让它成为一个无限循环。

代码：

var Engine = require('famous/core/Engine');
var Surface = require('famous/core/Surface');
var Transform = require('famous/core/Transform');
var StateModifier = require('famous/modifiers/StateModifier');
var Easing = require('famous/transitions/Easing');

var mainContext = Engine.createContext();

var surface = new Surface({
    size: [180, 180],
    properties: {
        backgroundColor: 'grey',
        borderRadius: '50%'
    }
});

var stateModifier = new StateModifier();

stateModifier.setTransform(
    Transform.scale(0.7, 0.7, 1),
    { duration : 1050 }
);

stateModifier.setTransform(
    Transform.scale(1, 1, 1),
    { duration : 450 }
);

mainContext.add(stateModifier).add(surface);

任何人都知道如何实现这个目标？

Answer 1

使用回调并将setTransform包装在一个函数中，以便在完成后让每个回调相互调用。

运行代码段示例

define('main', function(require, exports, module) {
  var Engine = require('famous/core/Engine');
  var Surface = require('famous/core/Surface');
  var Transform = require('famous/core/Transform');
  var StateModifier = require('famous/modifiers/StateModifier');
  var Easing = require('famous/transitions/Easing');

  var mainContext = Engine.createContext();

  var surface = new Surface({
    size: [180, 180],
    properties: {
      backgroundColor: 'grey',
      borderRadius: '50%'
    }
  });

  var stateModifier = new StateModifier();

  function min() {
    stateModifier.setTransform(
      Transform.scale(0.7, 0.7, 1), {
        duration: 1050
      },
      max
    );
  }

  function max() {
    stateModifier.setTransform(
      Transform.scale(1, 1, 1), {
        duration: 450
      },
      min
    );
  }

  mainContext.add(stateModifier).add(surface);

  surface.on('deploy', function() {
    min();
  });


});
require(['main']);

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