import Component from '@ember/component'; import { computed, set, get } from '@ember/object'; const size = 336; const insetSize = size / 2 - 8; const inset = function(num) { return insetSize * num; }; const milliseconds = function(num, max) { return max > 0 ? parseInt(max * num) / 100 : 0; }; export default Component.extend({ size: size, tomography: 0, max: -999999999, init: function() { this._super(...arguments); this.circle = [inset(1), inset(0.25), inset(0.5), inset(0.75), inset(1)]; this.labels = [inset(-0.25), inset(-0.5), inset(-0.75), inset(-1)]; }, milliseconds: computed('distances', 'max', function() { const max = get(this, 'max'); return [ milliseconds(25, max), milliseconds(50, max), milliseconds(75, max), milliseconds(100, max), ]; }), distances: computed('tomography', function() { const tomography = get(this, 'tomography'); let distances = get(tomography, 'distances') || []; distances.forEach((d, i) => { if (d.distance > get(this, 'max')) { set(this, 'max', d.distance); } }); let n = get(distances, 'length'); if (n > 360) { // We have more nodes than we want to show, take a random sampling to keep // the number around 360. const sampling = 360 / n; distances = distances.filter(function(_, i) { return i == 0 || i == n - 1 || Math.random() < sampling; }); n = get(distances, 'length'); } return distances.map((d, i) => { return { rotate: (i * 360) / n, y2: -insetSize * (d.distance / get(this, 'max')), node: d.node, distance: d.distance, segment: d.segment, }; }); }), });