126 lines
3.3 KiB
JavaScript
Generated
126 lines
3.3 KiB
JavaScript
Generated
/*
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* Licensed to the Apache Software Foundation (ASF) under one
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* or more contributor license agreements. See the NOTICE file
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* distributed with this work for additional information
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* regarding copyright ownership. The ASF licenses this file
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* to you under the Apache License, Version 2.0 (the
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* "License"); you may not use this file except in compliance
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* with the License. You may obtain a copy of the License at
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*
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* http://www.apache.org/licenses/LICENSE-2.0
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*
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* Unless required by applicable law or agreed to in writing,
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* software distributed under the License is distributed on an
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* "AS IS" BASIS, WITHOUT WARRANTIES OR CONDITIONS OF ANY
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* KIND, either express or implied. See the License for the
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* specific language governing permissions and limitations
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* under the License.
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*/
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var echarts = require('../../dist/echarts');
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// var v8 = require('v8');
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// v8.setFlagsFromString('--max-old-space-size=4096');
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var { createCanvas } = require('canvas');
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var fs = require('fs');
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var ProgressBar = require('progress');
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echarts.setCanvasCreator(function () {
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return createCanvas(100, 100);
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});
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var canvas = createCanvas();
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canvas.width = 2048;
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canvas.height = 1024;
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var worldJson = JSON.parse(fs.readFileSync('.././data/map/json/world.json', 'utf-8'));
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echarts.registerMap('world', worldJson);
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var chart = echarts.init(canvas);
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chart.setOption({
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backgroundColor: '#000',
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geo: {
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map: 'world',
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roam: true,
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label: {
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emphasis: {
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show: false
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}
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},
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silent: true,
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itemStyle: {
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normal: {
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areaColor: '#323c48',
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borderColor: '#111'
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},
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emphasis: {
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areaColor: '#2a333d'
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}
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}
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},
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series: [{
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name: '弱',
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type: 'scatter',
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progressive: 1e5,
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coordinateSystem: 'geo',
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symbolSize: 0.5,
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blendMode: 'lighter',
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large: true,
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itemStyle: {
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normal: {
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color: 'rgb(20, 15, 2)'
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}
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},
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postEffect: {
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enable: true
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},
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silent: true,
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dimensions: ['lng', 'lat'],
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data: new Float32Array()
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}]
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});
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// var CHUNK_COUNT = 277;
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var CHUNK_COUNT = 229;
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// https://blog.openstreetmap.org/2012/04/01/bulk-gps-point-data/
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function fetchData(idx) {
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if (idx >= CHUNK_COUNT) {
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setTimeout(function () {
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fs.writeFile('out.png', canvas.toBuffer());
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chart.dispose();
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});
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return;
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}
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fs.readFile(`../../../echarts-gl/test/data/gps/gps_${idx}.bin`, function (err, buffer) {
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var arr = new Uint8Array(buffer.length);
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for (var i = 0; i < buffer.length; i++) {
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arr[i] = buffer[i];
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}
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var rawData = new Int32Array(arr.buffer);
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var data = new Float32Array(rawData.length);
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for (var i = 0; i < rawData.length; i += 2) {
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data[i] = rawData[i+1] / 1e7;
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data[i+1] = rawData[i] / 1e7;
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}
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chart.appendData({
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seriesIndex: 0,
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data: data
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});
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fetchData(idx + 1);
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progress.tick();
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});
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}
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var progress = new ProgressBar('Generating [:bar] :percent :etas', {
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complete: '=',
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incomplete: ' ',
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width: 50,
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total: CHUNK_COUNT
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});
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fetchData(0); |