WIP, not really better
Esse commit está contido em:
Felix Geisendörfer
@@ -1,4 +1,4 @@
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#plot{
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height: 500px;
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width: 30%;
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#sensors{
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height: 300px;
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width: 800px;
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}
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@@ -7,11 +7,11 @@
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<link rel="stylesheet" type="text/css" href="./css/main.css" />
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<script src="./js/deps/jquery-2.0.3.js"></script>
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<script src="./js/deps/jquery.flot.js"></script>
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<script src="./js/deps/smoothie.js"></script>
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<script src="./js/main.js"></script>
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</head>
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<body>
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<h1>Godrone</h1>
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<div id="plot"></div>
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<canvas id="sensors"></canvas>
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</body>
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</html>
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Diff do arquivo suprimido porque uma ou mais linhas são muito longas
@@ -0,0 +1,660 @@
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// MIT License:
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//
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// Copyright (c) 2010-2013, Joe Walnes
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//
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// Permission is hereby granted, free of charge, to any person obtaining a copy
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// of this software and associated documentation files (the "Software"), to deal
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// in the Software without restriction, including without limitation the rights
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// to use, copy, modify, merge, publish, distribute, sublicense, and/or sell
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// copies of the Software, and to permit persons to whom the Software is
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// furnished to do so, subject to the following conditions:
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//
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// The above copyright notice and this permission notice shall be included in
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// all copies or substantial portions of the Software.
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//
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// THE SOFTWARE IS PROVIDED "AS IS", WITHOUT WARRANTY OF ANY KIND, EXPRESS OR
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// IMPLIED, INCLUDING BUT NOT LIMITED TO THE WARRANTIES OF MERCHANTABILITY,
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// FITNESS FOR A PARTICULAR PURPOSE AND NONINFRINGEMENT. IN NO EVENT SHALL THE
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// AUTHORS OR COPYRIGHT HOLDERS BE LIABLE FOR ANY CLAIM, DAMAGES OR OTHER
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// LIABILITY, WHETHER IN AN ACTION OF CONTRACT, TORT OR OTHERWISE, ARISING FROM,
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// OUT OF OR IN CONNECTION WITH THE SOFTWARE OR THE USE OR OTHER DEALINGS IN
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// THE SOFTWARE.
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/**
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* Smoothie Charts - http://smoothiecharts.org/
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* (c) 2010-2013, Joe Walnes
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* 2013, Drew Noakes
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*
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* v1.0: Main charting library, by Joe Walnes
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* v1.1: Auto scaling of axis, by Neil Dunn
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* v1.2: fps (frames per second) option, by Mathias Petterson
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* v1.3: Fix for divide by zero, by Paul Nikitochkin
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* v1.4: Set minimum, top-scale padding, remove timeseries, add optional timer to reset bounds, by Kelley Reynolds
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* v1.5: Set default frames per second to 50... smoother.
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* .start(), .stop() methods for conserving CPU, by Dmitry Vyal
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* options.interpolation = 'bezier' or 'line', by Dmitry Vyal
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* options.maxValue to fix scale, by Dmitry Vyal
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* v1.6: minValue/maxValue will always get converted to floats, by Przemek Matylla
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* v1.7: options.grid.fillStyle may be a transparent color, by Dmitry A. Shashkin
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* Smooth rescaling, by Kostas Michalopoulos
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* v1.8: Set max length to customize number of live points in the dataset with options.maxDataSetLength, by Krishna Narni
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* v1.9: Display timestamps along the bottom, by Nick and Stev-io
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* (https://groups.google.com/forum/?fromgroups#!topic/smoothie-charts/-Ywse8FCpKI%5B1-25%5D)
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* Refactored by Krishna Narni, to support timestamp formatting function
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* v1.10: Switch to requestAnimationFrame, removed the now obsoleted options.fps, by Gergely Imreh
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* v1.11: options.grid.sharpLines option added, by @drewnoakes
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* Addressed warning seen in Firefox when seriesOption.fillStyle undefined, by @drewnoakes
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* v1.12: Support for horizontalLines added, by @drewnoakes
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* Support for yRangeFunction callback added, by @drewnoakes
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* v1.13: Fixed typo (#32), by @alnikitich
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* v1.14: Timer cleared when last TimeSeries removed (#23), by @davidgaleano
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* Fixed diagonal line on chart at start/end of data stream, by @drewnoakes
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* v1.15: Support for npm package (#18), by @dominictarr
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* Fixed broken removeTimeSeries function (#24) by @davidgaleano
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* Minor performance and tidying, by @drewnoakes
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* v1.16: Bug fix introduced in v1.14 relating to timer creation/clearance (#23), by @drewnoakes
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* TimeSeries.append now deals with out-of-order timestamps, and can merge duplicates, by @zacwitte (#12)
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* Documentation and some local variable renaming for clarity, by @drewnoakes
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* v1.17: Allow control over font size (#10), by @drewnoakes
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* Timestamp text won't overlap, by @drewnoakes
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* v1.18: Allow control of max/min label precision, by @drewnoakes
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* Added 'borderVisible' chart option, by @drewnoakes
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* Allow drawing series with fill but no stroke (line), by @drewnoakes
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*/
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;(function(exports) {
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var Util = {
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extend: function() {
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arguments[0] = arguments[0] || {};
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for (var i = 1; i < arguments.length; i++)
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{
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for (var key in arguments[i])
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{
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if (arguments[i].hasOwnProperty(key))
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{
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if (typeof(arguments[i][key]) === 'object') {
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if (arguments[i][key] instanceof Array) {
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arguments[0][key] = arguments[i][key];
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} else {
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arguments[0][key] = Util.extend(arguments[0][key], arguments[i][key]);
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}
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} else {
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arguments[0][key] = arguments[i][key];
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}
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}
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}
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}
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return arguments[0];
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}
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};
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/**
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* Initialises a new <code>TimeSeries</code> with optional data options.
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*
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* Options are of the form (defaults shown):
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*
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* <pre>
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* {
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* resetBounds: true, // enables/disables automatic scaling of the y-axis
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* resetBoundsInterval: 3000 // the period between scaling calculations, in millis
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* }
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* </pre>
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*
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* Presentation options for TimeSeries are specified as an argument to <code>SmoothieChart.addTimeSeries</code>.
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*
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* @constructor
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*/
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function TimeSeries(options) {
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this.options = Util.extend({}, TimeSeries.defaultOptions, options);
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this.data = [];
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this.maxValue = Number.NaN; // The maximum value ever seen in this TimeSeries.
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this.minValue = Number.NaN; // The minimum value ever seen in this TimeSeries.
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}
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TimeSeries.defaultOptions = {
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resetBoundsInterval: 3000,
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resetBounds: true
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};
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/**
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* Recalculate the min/max values for this <code>TimeSeries</code> object.
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*
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* This causes the graph to scale itself in the y-axis.
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*/
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TimeSeries.prototype.resetBounds = function() {
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if (this.data.length) {
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// Walk through all data points, finding the min/max value
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this.maxValue = this.data[0][1];
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this.minValue = this.data[0][1];
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for (var i = 1; i < this.data.length; i++) {
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var value = this.data[i][1];
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if (value > this.maxValue) {
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this.maxValue = value;
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}
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if (value < this.minValue) {
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this.minValue = value;
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}
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}
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} else {
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// No data exists, so set min/max to NaN
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this.maxValue = Number.NaN;
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this.minValue = Number.NaN;
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}
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};
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/**
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* Adds a new data point to the <code>TimeSeries</code>, preserving chronological order.
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*
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* @param timestamp the position, in time, of this data point
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* @param value the value of this data point
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* @param sumRepeatedTimeStampValues if <code>timestamp</code> has an exact match in the series, this flag controls
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* whether it is replaced, or the values summed (defaults to false.)
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*/
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TimeSeries.prototype.append = function(timestamp, value, sumRepeatedTimeStampValues) {
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// Rewind until we hit an older timestamp
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var i = this.data.length - 1;
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while (i > 0 && this.data[i][0] > timestamp) {
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i--;
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}
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if (this.data.length > 0 && this.data[i][0] === timestamp) {
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// Update existing values in the array
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if (sumRepeatedTimeStampValues) {
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// Sum this value into the existing 'bucket'
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this.data[i][1] += value;
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value = this.data[i][1];
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} else {
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// Replace the previous value
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this.data[i][1] = value;
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}
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} else if (i < this.data.length - 1) {
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// Splice into the correct position to keep timestamps in order
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this.data.splice(i + 1, 0, [timestamp, value]);
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} else {
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// Add to the end of the array
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this.data.push([timestamp, value]);
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}
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this.maxValue = isNaN(this.maxValue) ? value : Math.max(this.maxValue, value);
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this.minValue = isNaN(this.minValue) ? value : Math.min(this.minValue, value);
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};
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TimeSeries.prototype.dropOldData = function(oldestValidTime, maxDataSetLength) {
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// We must always keep one expired data point as we need this to draw the
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// line that comes into the chart from the left, but any points prior to that can be removed.
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var removeCount = 0;
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while (this.data.length - removeCount >= maxDataSetLength && this.data[removeCount + 1][0] < oldestValidTime) {
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removeCount++;
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}
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if (removeCount !== 0) {
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this.data.splice(0, removeCount);
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}
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};
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/**
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* Initialises a new <code>SmoothieChart</code>.
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*
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* Options are optional, and should be of the form below. Just specify the values you
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* need and the rest will be given sensible defaults as shown:
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*
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* <pre>
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* {
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* minValue: undefined, // specify to clamp the lower y-axis to a given value
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* maxValue: undefined, // specify to clamp the upper y-axis to a given value
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* maxValueScale: 1, // allows proportional padding to be added above the chart. for 10% padding, specify 1.1.
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* yRangeFunction: undefined, // function({min: , max: }) { return {min: , max: }; }
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* scaleSmoothing: 0.125, // controls the rate at which y-value zoom animation occurs
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* millisPerPixel: 20, // sets the speed at which the chart pans by
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* maxDataSetLength: 2,
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* interpolation: 'bezier' // or 'linear'
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* timestampFormatter: null, // Optional function to format time stamps for bottom of chart. You may use SmoothieChart.timeFormatter, or your own: function(date) { return ''; }
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* horizontalLines: [], // [ { value: 0, color: '#ffffff', lineWidth: 1 } ],
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* grid:
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* {
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* fillStyle: '#000000', // the background colour of the chart
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* lineWidth: 1, // the pixel width of grid lines
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* strokeStyle: '#777777', // colour of grid lines
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* millisPerLine: 1000, // distance between vertical grid lines
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* sharpLines: false, // controls whether grid lines are 1px sharp, or softened
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* verticalSections: 2, // number of vertical sections marked out by horizontal grid lines
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* borderVisible: true // whether the grid lines trace the border of the chart or not
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* },
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* labels
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* {
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* disabled: false, // enables/disables labels showing the min/max values
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* fillStyle: '#ffffff', // colour for text of labels,
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* fontSize: 15,
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* fontFamily: 'sans-serif',
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* precision: 2
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* },
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* }
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* </pre>
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*
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* @constructor
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*/
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function SmoothieChart(options) {
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this.options = Util.extend({}, SmoothieChart.defaultChartOptions, options);
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this.seriesSet = [];
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this.currentValueRange = 1;
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this.currentVisMinValue = 0;
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}
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SmoothieChart.defaultChartOptions = {
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millisPerPixel: 20,
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maxValueScale: 1,
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interpolation: 'bezier',
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scaleSmoothing: 0.125,
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maxDataSetLength: 2,
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grid: {
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fillStyle: '#000000',
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strokeStyle: '#777777',
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lineWidth: 1,
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sharpLines: false,
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millisPerLine: 1000,
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verticalSections: 2,
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borderVisible: true
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},
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labels: {
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fillStyle: '#ffffff',
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disabled: false,
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fontSize: 10,
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fontFamily: 'monospace',
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precision: 2
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},
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horizontalLines: []
|
||||
};
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// Based on http://inspirit.github.com/jsfeat/js/compatibility.js
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SmoothieChart.AnimateCompatibility = (function() {
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// TODO this global variable will cause bugs if more than one chart is used and the browser does not support *requestAnimationFrame natively
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var lastTime = 0,
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requestAnimationFrame = function(callback, element) {
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var requestAnimationFrame =
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window.requestAnimationFrame ||
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window.webkitRequestAnimationFrame ||
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window.mozRequestAnimationFrame ||
|
||||
window.oRequestAnimationFrame ||
|
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window.msRequestAnimationFrame ||
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function(callback) {
|
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var currTime = new Date().getTime(),
|
||||
timeToCall = Math.max(0, 16 - (currTime - lastTime)),
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id = window.setTimeout(function() {
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callback(currTime + timeToCall);
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}, timeToCall);
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lastTime = currTime + timeToCall;
|
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return id;
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};
|
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return requestAnimationFrame.call(window, callback, element);
|
||||
},
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cancelAnimationFrame = function(id) {
|
||||
var cancelAnimationFrame =
|
||||
window.cancelAnimationFrame ||
|
||||
function(id) {
|
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clearTimeout(id);
|
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};
|
||||
return cancelAnimationFrame.call(window, id);
|
||||
};
|
||||
|
||||
return {
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||||
requestAnimationFrame: requestAnimationFrame,
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cancelAnimationFrame: cancelAnimationFrame
|
||||
};
|
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})();
|
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|
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SmoothieChart.defaultSeriesPresentationOptions = {
|
||||
lineWidth: 1,
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||||
strokeStyle: '#ffffff'
|
||||
};
|
||||
|
||||
/**
|
||||
* Adds a <code>TimeSeries</code> to this chart, with optional presentation options.
|
||||
*
|
||||
* Presentation options should be of the form (defaults shown):
|
||||
*
|
||||
* <pre>
|
||||
* {
|
||||
* lineWidth: 1,
|
||||
* strokeStyle: '#ffffff',
|
||||
* fillStyle: undefined
|
||||
* }
|
||||
* </pre>
|
||||
*/
|
||||
SmoothieChart.prototype.addTimeSeries = function(timeSeries, options) {
|
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this.seriesSet.push({timeSeries: timeSeries, options: Util.extend({}, SmoothieChart.defaultSeriesPresentationOptions, options)});
|
||||
if (timeSeries.options.resetBounds && timeSeries.options.resetBoundsInterval > 0) {
|
||||
timeSeries.resetBoundsTimerId = setInterval(
|
||||
function() {
|
||||
timeSeries.resetBounds();
|
||||
},
|
||||
timeSeries.options.resetBoundsInterval
|
||||
);
|
||||
}
|
||||
};
|
||||
|
||||
/**
|
||||
* Removes the specified <code>TimeSeries</code> from the chart.
|
||||
*/
|
||||
SmoothieChart.prototype.removeTimeSeries = function(timeSeries) {
|
||||
// Find the correct timeseries to remove, and remove it
|
||||
var numSeries = this.seriesSet.length;
|
||||
for (var i = 0; i < numSeries; i++) {
|
||||
if (this.seriesSet[i].timeSeries === timeSeries) {
|
||||
this.seriesSet.splice(i, 1);
|
||||
break;
|
||||
}
|
||||
}
|
||||
// If a timer was operating for that timeseries, remove it
|
||||
if (timeSeries.resetBoundsTimerId) {
|
||||
// Stop resetting the bounds, if we were
|
||||
clearInterval(timeSeries.resetBoundsTimerId);
|
||||
}
|
||||
};
|
||||
|
||||
/**
|
||||
* Instructs the <code>SmoothieChart</code> to start rendering to the provided canvas, with specified delay.
|
||||
*
|
||||
* @param canvas the target canvas element
|
||||
* @param delayMillis an amount of time to wait before a data point is shown. This can prevent the end of the series
|
||||
* from appearing on screen, with new values flashing into view, at the expense of some latency.
|
||||
*/
|
||||
SmoothieChart.prototype.streamTo = function(canvas, delayMillis) {
|
||||
this.canvas = canvas;
|
||||
this.delay = delayMillis;
|
||||
this.start();
|
||||
};
|
||||
|
||||
/**
|
||||
* Starts the animation of this chart.
|
||||
*/
|
||||
SmoothieChart.prototype.start = function() {
|
||||
if (this.frame) {
|
||||
// We're already running, so just return
|
||||
return;
|
||||
}
|
||||
|
||||
// Renders a frame, and queues the next frame for later rendering
|
||||
var animate = function() {
|
||||
this.frame = SmoothieChart.AnimateCompatibility.requestAnimationFrame(function() {
|
||||
this.render();
|
||||
animate();
|
||||
}.bind(this));
|
||||
}.bind(this);
|
||||
|
||||
animate();
|
||||
};
|
||||
|
||||
/**
|
||||
* Stops the animation of this chart.
|
||||
*/
|
||||
SmoothieChart.prototype.stop = function() {
|
||||
if (this.frame) {
|
||||
SmoothieChart.AnimateCompatibility.cancelAnimationFrame(this.frame);
|
||||
delete this.frame;
|
||||
}
|
||||
};
|
||||
|
||||
SmoothieChart.prototype.updateValueRange = function() {
|
||||
// Calculate the current scale of the chart, from all time series.
|
||||
var chartOptions = this.options,
|
||||
chartMaxValue = Number.NaN,
|
||||
chartMinValue = Number.NaN;
|
||||
|
||||
for (var d = 0; d < this.seriesSet.length; d++) {
|
||||
// TODO(ndunn): We could calculate / track these values as they stream in.
|
||||
var timeSeries = this.seriesSet[d].timeSeries;
|
||||
if (!isNaN(timeSeries.maxValue)) {
|
||||
chartMaxValue = !isNaN(chartMaxValue) ? Math.max(chartMaxValue, timeSeries.maxValue) : timeSeries.maxValue;
|
||||
}
|
||||
|
||||
if (!isNaN(timeSeries.minValue)) {
|
||||
chartMinValue = !isNaN(chartMinValue) ? Math.min(chartMinValue, timeSeries.minValue) : timeSeries.minValue;
|
||||
}
|
||||
}
|
||||
|
||||
// Scale the chartMaxValue to add padding at the top if required
|
||||
if (chartOptions.maxValue != null) {
|
||||
chartMaxValue = chartOptions.maxValue;
|
||||
} else {
|
||||
chartMaxValue *= chartOptions.maxValueScale;
|
||||
}
|
||||
|
||||
// Set the minimum if we've specified one
|
||||
if (chartOptions.minValue != null) {
|
||||
chartMinValue = chartOptions.minValue;
|
||||
}
|
||||
|
||||
// If a custom range function is set, call it
|
||||
if (this.options.yRangeFunction) {
|
||||
var range = this.options.yRangeFunction({min: chartMinValue, max: chartMaxValue});
|
||||
chartMinValue = range.min;
|
||||
chartMaxValue = range.max;
|
||||
}
|
||||
|
||||
if (!isNaN(chartMaxValue) && !isNaN(chartMinValue)) {
|
||||
var targetValueRange = chartMaxValue - chartMinValue;
|
||||
this.currentValueRange += chartOptions.scaleSmoothing * (targetValueRange - this.currentValueRange);
|
||||
this.currentVisMinValue += chartOptions.scaleSmoothing * (chartMinValue - this.currentVisMinValue);
|
||||
}
|
||||
|
||||
this.valueRange = { min: chartMinValue, max: chartMaxValue };
|
||||
};
|
||||
|
||||
SmoothieChart.prototype.render = function(canvas, time) {
|
||||
canvas = canvas || this.canvas;
|
||||
time = time || new Date().getTime() - (this.delay || 0);
|
||||
|
||||
// TODO only render if the chart has moved at least 1px since the last rendered frame
|
||||
|
||||
// Round time down to pixel granularity, so motion appears smoother.
|
||||
time -= time % this.options.millisPerPixel;
|
||||
|
||||
var context = canvas.getContext('2d'),
|
||||
chartOptions = this.options,
|
||||
dimensions = { top: 0, left: 0, width: canvas.clientWidth, height: canvas.clientHeight },
|
||||
// Calculate the threshold time for the oldest data points.
|
||||
oldestValidTime = time - (dimensions.width * chartOptions.millisPerPixel),
|
||||
valueToYPixel = function(value) {
|
||||
var offset = value - this.currentVisMinValue;
|
||||
return this.currentValueRange === 0
|
||||
? dimensions.height
|
||||
: dimensions.height - (Math.round((offset / this.currentValueRange) * dimensions.height));
|
||||
}.bind(this),
|
||||
timeToXPixel = function(t) {
|
||||
return Math.round(dimensions.width - ((time - t) / chartOptions.millisPerPixel));
|
||||
};
|
||||
|
||||
this.updateValueRange();
|
||||
|
||||
context.font = chartOptions.labels.fontSize + 'px ' + chartOptions.labels.fontFamily;
|
||||
|
||||
// Save the state of the canvas context, any transformations applied in this method
|
||||
// will get removed from the stack at the end of this method when .restore() is called.
|
||||
context.save();
|
||||
|
||||
// Move the origin.
|
||||
context.translate(dimensions.left, dimensions.top);
|
||||
|
||||
// Create a clipped rectangle - anything we draw will be constrained to this rectangle.
|
||||
// This prevents the occasional pixels from curves near the edges overrunning and creating
|
||||
// screen cheese (that phrase should need no explanation).
|
||||
context.beginPath();
|
||||
context.rect(0, 0, dimensions.width, dimensions.height);
|
||||
context.clip();
|
||||
|
||||
// Clear the working area.
|
||||
context.save();
|
||||
context.fillStyle = chartOptions.grid.fillStyle;
|
||||
context.clearRect(0, 0, dimensions.width, dimensions.height);
|
||||
context.fillRect(0, 0, dimensions.width, dimensions.height);
|
||||
context.restore();
|
||||
|
||||
// Grid lines...
|
||||
context.save();
|
||||
context.lineWidth = chartOptions.grid.lineWidth;
|
||||
context.strokeStyle = chartOptions.grid.strokeStyle;
|
||||
// Vertical (time) dividers.
|
||||
if (chartOptions.grid.millisPerLine > 0) {
|
||||
var textUntilX = dimensions.width - context.measureText(minValueString).width + 4;
|
||||
for (var t = time - (time % chartOptions.grid.millisPerLine);
|
||||
t >= oldestValidTime;
|
||||
t -= chartOptions.grid.millisPerLine) {
|
||||
var gx = timeToXPixel(t);
|
||||
if (chartOptions.grid.sharpLines) {
|
||||
gx -= 0.5;
|
||||
}
|
||||
context.beginPath();
|
||||
context.moveTo(gx, 0);
|
||||
context.lineTo(gx, dimensions.height);
|
||||
context.stroke();
|
||||
context.closePath();
|
||||
|
||||
// Display timestamp at bottom of this line if requested, and it won't overlap
|
||||
if (chartOptions.timestampFormatter && gx < textUntilX) {
|
||||
// Formats the timestamp based on user specified formatting function
|
||||
// SmoothieChart.timeFormatter function above is one such formatting option
|
||||
var tx = new Date(t),
|
||||
ts = chartOptions.timestampFormatter(tx),
|
||||
tsWidth = context.measureText(ts).width;
|
||||
textUntilX = gx - tsWidth - 2;
|
||||
context.fillStyle = chartOptions.labels.fillStyle;
|
||||
context.fillText(ts, gx - tsWidth, dimensions.height - 2);
|
||||
}
|
||||
}
|
||||
}
|
||||
|
||||
// Horizontal (value) dividers.
|
||||
for (var v = 1; v < chartOptions.grid.verticalSections; v++) {
|
||||
var gy = Math.round(v * dimensions.height / chartOptions.grid.verticalSections);
|
||||
if (chartOptions.grid.sharpLines) {
|
||||
gy -= 0.5;
|
||||
}
|
||||
context.beginPath();
|
||||
context.moveTo(0, gy);
|
||||
context.lineTo(dimensions.width, gy);
|
||||
context.stroke();
|
||||
context.closePath();
|
||||
}
|
||||
// Bounding rectangle.
|
||||
if (chartOptions.grid.borderVisible) {
|
||||
context.beginPath();
|
||||
context.strokeRect(0, 0, dimensions.width, dimensions.height);
|
||||
context.closePath();
|
||||
}
|
||||
context.restore();
|
||||
|
||||
// Draw any horizontal lines...
|
||||
if (chartOptions.horizontalLines && chartOptions.horizontalLines.length) {
|
||||
for (var hl = 0; hl < chartOptions.horizontalLines.length; hl++) {
|
||||
var line = chartOptions.horizontalLines[hl],
|
||||
hly = Math.round(valueToYPixel(line.value)) - 0.5;
|
||||
context.strokeStyle = line.color || '#ffffff';
|
||||
context.lineWidth = line.lineWidth || 1;
|
||||
context.beginPath();
|
||||
context.moveTo(0, hly);
|
||||
context.lineTo(dimensions.width, hly);
|
||||
context.stroke();
|
||||
context.closePath();
|
||||
}
|
||||
}
|
||||
|
||||
// For each data set...
|
||||
for (var d = 0; d < this.seriesSet.length; d++) {
|
||||
context.save();
|
||||
var timeSeries = this.seriesSet[d].timeSeries,
|
||||
dataSet = timeSeries.data,
|
||||
seriesOptions = this.seriesSet[d].options;
|
||||
|
||||
// Delete old data that's moved off the left of the chart.
|
||||
timeSeries.dropOldData(oldestValidTime, chartOptions.maxDataSetLength);
|
||||
|
||||
// Set style for this dataSet.
|
||||
context.lineWidth = seriesOptions.lineWidth;
|
||||
context.strokeStyle = seriesOptions.strokeStyle;
|
||||
// Draw the line...
|
||||
context.beginPath();
|
||||
// Retain lastX, lastY for calculating the control points of bezier curves.
|
||||
var firstX = 0, lastX = 0, lastY = 0;
|
||||
for (var i = 0; i < dataSet.length && dataSet.length !== 1; i++) {
|
||||
var x = timeToXPixel(dataSet[i][0]),
|
||||
y = valueToYPixel(dataSet[i][1]);
|
||||
|
||||
if (i === 0) {
|
||||
firstX = x;
|
||||
context.moveTo(x, y);
|
||||
} else {
|
||||
switch (chartOptions.interpolation) {
|
||||
case "linear":
|
||||
case "line": {
|
||||
context.lineTo(x,y);
|
||||
break;
|
||||
}
|
||||
case "bezier":
|
||||
default: {
|
||||
// Great explanation of Bezier curves: http://en.wikipedia.org/wiki/Bezier_curve#Quadratic_curves
|
||||
//
|
||||
// Assuming A was the last point in the line plotted and B is the new point,
|
||||
// we draw a curve with control points P and Q as below.
|
||||
//
|
||||
// A---P
|
||||
// |
|
||||
// |
|
||||
// |
|
||||
// Q---B
|
||||
//
|
||||
// Importantly, A and P are at the same y coordinate, as are B and Q. This is
|
||||
// so adjacent curves appear to flow as one.
|
||||
//
|
||||
context.bezierCurveTo( // startPoint (A) is implicit from last iteration of loop
|
||||
Math.round((lastX + x) / 2), lastY, // controlPoint1 (P)
|
||||
Math.round((lastX + x)) / 2, y, // controlPoint2 (Q)
|
||||
x, y); // endPoint (B)
|
||||
break;
|
||||
}
|
||||
}
|
||||
}
|
||||
|
||||
lastX = x; lastY = y;
|
||||
}
|
||||
|
||||
if (dataSet.length > 1) {
|
||||
if (seriesOptions.fillStyle) {
|
||||
// Close up the fill region.
|
||||
context.lineTo(dimensions.width + seriesOptions.lineWidth + 1, lastY);
|
||||
context.lineTo(dimensions.width + seriesOptions.lineWidth + 1, dimensions.height + seriesOptions.lineWidth + 1);
|
||||
context.lineTo(firstX, dimensions.height + seriesOptions.lineWidth);
|
||||
context.fillStyle = seriesOptions.fillStyle;
|
||||
context.fill();
|
||||
}
|
||||
|
||||
if (seriesOptions.strokeStyle && seriesOptions.strokeStyle !== 'none') {
|
||||
context.stroke();
|
||||
}
|
||||
context.closePath();
|
||||
}
|
||||
context.restore();
|
||||
}
|
||||
|
||||
// Draw the axis values on the chart.
|
||||
if (!chartOptions.labels.disabled && !isNaN(this.valueRange.min) && !isNaN(this.valueRange.max)) {
|
||||
var maxValueString = parseFloat(this.valueRange.max).toFixed(chartOptions.labels.precision),
|
||||
minValueString = parseFloat(this.valueRange.min).toFixed(chartOptions.labels.precision);
|
||||
context.fillStyle = chartOptions.labels.fillStyle;
|
||||
context.fillText(maxValueString, dimensions.width - context.measureText(maxValueString).width - 2, chartOptions.labels.fontSize);
|
||||
context.fillText(minValueString, dimensions.width - context.measureText(minValueString).width - 2, dimensions.height - 2);
|
||||
}
|
||||
|
||||
context.restore(); // See .save() above.
|
||||
};
|
||||
|
||||
// Sample timestamp formatting function
|
||||
SmoothieChart.timeFormatter = function(date) {
|
||||
function pad2(number) { return (number < 10 ? '0' : '') + number }
|
||||
return pad2(date.getHours()) + ':' + pad2(date.getMinutes()) + ':' + pad2(date.getSeconds());
|
||||
};
|
||||
|
||||
exports.TimeSeries = TimeSeries;
|
||||
exports.SmoothieChart = SmoothieChart;
|
||||
|
||||
})(typeof exports === 'undefined' ? this : exports);
|
||||
|
||||
@@ -11,93 +11,44 @@ $(function() {
|
||||
socket.onmessage = function(e) {
|
||||
count++;
|
||||
navdata = JSON.parse(e.data);
|
||||
navdata.Received = Date.now();
|
||||
};
|
||||
|
||||
var lastHz = Date.now();
|
||||
setInterval(function() {
|
||||
console.log('navdata rate: %s hz', count/((lastHz-Date.now())/1000), navdata);
|
||||
console.log('navdata rate: %s hz', count/((lastHz-Date.now())/1000), navdata, min, max);
|
||||
count = 0;
|
||||
lastHz = Date.now();
|
||||
}, 1000);
|
||||
|
||||
//
|
||||
// We use an inline data source in the example, usually data would
|
||||
// be fetched from a server
|
||||
var smoothie = new SmoothieChart({millisPerPixel: 1,minValue:500, maxValue:4000});
|
||||
smoothie.streamTo(document.getElementById('sensors'));
|
||||
|
||||
var totalPoints = 300, scale = 100;
|
||||
var fields = {};
|
||||
|
||||
function getNavdata(fieldName) {
|
||||
var val = (navdata)
|
||||
? navdata[fieldName]
|
||||
: 0;
|
||||
|
||||
var field = fields[fieldName];
|
||||
if (!field) {
|
||||
field = fields[fieldName] = {min: 0, max: 0, data: []}
|
||||
}
|
||||
|
||||
if (val < field.min) {
|
||||
field.min = val;
|
||||
}
|
||||
if (val > field.max) {
|
||||
field.max = val;
|
||||
}
|
||||
|
||||
if (field.data.length == 0) {
|
||||
for (var i = 0; i < totalPoints; i++) {
|
||||
field.data.push(0);
|
||||
}
|
||||
}
|
||||
|
||||
scaled = ((val - field.min) / (field.max - field.min)) * scale;
|
||||
|
||||
field.data.shift();
|
||||
field.data.push(scaled);
|
||||
|
||||
// Zip the generated y values with the x values
|
||||
|
||||
var res = [];
|
||||
for (var i = 0; i < field.data.length; ++i) {
|
||||
res.push([i, field.data[i]])
|
||||
}
|
||||
|
||||
return {
|
||||
data: res,
|
||||
label: fieldName,
|
||||
};
|
||||
}
|
||||
|
||||
function getPlots() {
|
||||
return [
|
||||
getNavdata('Gx'),
|
||||
getNavdata('Gy'),
|
||||
getNavdata('Gz'),
|
||||
getNavdata('Ax'),
|
||||
getNavdata('Ay'),
|
||||
getNavdata('Az'),
|
||||
];
|
||||
}
|
||||
|
||||
var plot = $.plot("#plot", getPlots(), {
|
||||
series: {
|
||||
shadowSize: 0,
|
||||
},
|
||||
yaxis: {
|
||||
min: 0,
|
||||
max: scale
|
||||
},
|
||||
xaxis: {
|
||||
show: false
|
||||
}
|
||||
var sensors = ['Az'];
|
||||
var lines = {};
|
||||
sensors.forEach(function(sensor) {
|
||||
var line = new TimeSeries();
|
||||
smoothie.addTimeSeries(line);
|
||||
lines[sensor] = line;
|
||||
});
|
||||
|
||||
var min = undefined;
|
||||
var max = undefined;
|
||||
|
||||
function update() {
|
||||
plot.setData(getPlots());
|
||||
if (navdata) {
|
||||
sensors.forEach(function(sensor) {
|
||||
var val = navdata[sensor];
|
||||
if (min === undefined || val < min) {
|
||||
min = val;
|
||||
}
|
||||
if (max === undefined || val > max) {
|
||||
max = val;
|
||||
}
|
||||
lines[sensor].append(navdata.Received, val)
|
||||
});
|
||||
}
|
||||
|
||||
// Since the axes don't change, we don't need to call plot.setupGrid()
|
||||
|
||||
plot.draw();
|
||||
requestAnimationFrame(update);
|
||||
}
|
||||
|
||||
|
||||
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