57 lines
1.2 KiB
JavaScript
57 lines
1.2 KiB
JavaScript
var ease = require('./easing.js').ease
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var resolution = 25;
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exports.Anim = function(universe) {
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this.universe = universe;
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this.fx_stack = [];
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this.add = function(to, duration, options) {
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var options = options || {};
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var duration = duration || resolution;
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options['easing'] = options['easing'] || 'linear';
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this.fx_stack.push({'to': to, 'duration': duration, 'options': options});
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return this;
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}
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this.delay = function(duration) {
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return this.add({}, duration);
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}
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this.run = function(onFinish) {
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var config = {}
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, t = 0
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, d = 0
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, a
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;
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var fx_stack = this.fx_stack;
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var ani_setup = function() {
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a = fx_stack.shift();
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t = 0;
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d = a.duration;
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config = {}
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for(var k in a.to) {
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config[k] = {
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'start': universe.get(k),
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'end': a.to[k]
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}
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}
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}
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var ani_step = function() {
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new_vals = {};
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for(var k in config) {
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new_vals[k] = Math.round(config[k].start + ease['linear'](t, 0, 1, d) * (config[k].end - config[k].start))
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}
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t = t + resolution;
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universe.update(new_vals);
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if(t > d) {
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if(fx_stack.length > 0) {
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ani_setup()
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} else {
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clearInterval(iid);
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if(onFinish) onFinish();
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}
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}
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}
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ani_setup();
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var iid = setInterval(ani_step, resolution);
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}
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}
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