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2312 lines
66 KiB
2312 lines
66 KiB
var Emitter = require('emitter-component');
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var DataSet = require('../DataSet');
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var DataView = require('../DataView');
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var util = require('../util');
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var Point3d = require('./Point3d');
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var Point2d = require('./Point2d');
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var Camera = require('./Camera');
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var Filter = require('./Filter');
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var Slider = require('./Slider');
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var StepNumber = require('./StepNumber');
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var Range = require('./Range');
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var Settings = require('./Settings');
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var DataGroup = require('./DataGroup');
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/// enumerate the available styles
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Graph3d.STYLE = Settings.STYLE;
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/**
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* Following label is used in the settings to describe values which should be
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* determined by the code while running, from the current data and graph style.
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*
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* Using 'undefined' directly achieves the same thing, but this is more
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* descriptive by describing the intent.
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*/
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var autoByDefault = undefined;
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/**
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* Default values for option settings.
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*
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* These are the values used when a Graph3d instance is initialized without
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* custom settings.
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*
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* If a field is not in this list, a default value of 'autoByDefault' is assumed,
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* which is just an alias for 'undefined'.
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*/
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var DEFAULTS = {
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width : '400px',
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height : '400px',
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filterLabel : 'time',
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legendLabel : 'value',
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xLabel : 'x',
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yLabel : 'y',
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zLabel : 'z',
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xValueLabel : function(v) { return v; },
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yValueLabel : function(v) { return v; },
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zValueLabel : function(v) { return v; },
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showXAxis : true,
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showYAxis : true,
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showZAxis : true,
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showGrid : true,
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showPerspective : true,
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showShadow : false,
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keepAspectRatio : true,
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verticalRatio : 0.5, // 0.1 to 1.0, where 1.0 results in a 'cube'
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dotSizeRatio : 0.02, // size of the dots as a fraction of the graph width
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dotSizeMinFraction: 0.5, // size of min-value dot as a fraction of dotSizeRatio
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dotSizeMaxFraction: 2.5, // size of max-value dot as a fraction of dotSizeRatio
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showAnimationControls: autoByDefault,
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animationInterval : 1000, // milliseconds
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animationPreload : false,
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animationAutoStart : autoByDefault,
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axisColor : '#4D4D4D',
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gridColor : '#D3D3D3',
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xCenter : '55%',
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yCenter : '50%',
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style : Graph3d.STYLE.DOT,
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tooltip : false,
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tooltipStyle : {
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content : {
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padding : '10px',
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border : '1px solid #4d4d4d',
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color : '#1a1a1a',
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background : 'rgba(255,255,255,0.7)',
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borderRadius : '2px',
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boxShadow : '5px 5px 10px rgba(128,128,128,0.5)'
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},
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line : {
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height : '40px',
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width : '0',
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borderLeft : '1px solid #4d4d4d'
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},
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dot : {
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height : '0',
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width : '0',
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border : '5px solid #4d4d4d',
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borderRadius : '5px'
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}
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},
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showLegend : autoByDefault, // determined by graph style
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backgroundColor : autoByDefault,
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dataColor : {
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fill : '#7DC1FF',
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stroke : '#3267D2',
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strokeWidth: 1 // px
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},
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cameraPosition : {
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horizontal: 1.0,
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vertical : 0.5,
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distance : 1.7
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},
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xBarWidth : autoByDefault,
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yBarWidth : autoByDefault,
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valueMin : autoByDefault,
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valueMax : autoByDefault,
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xMin : autoByDefault,
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xMax : autoByDefault,
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xStep : autoByDefault,
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yMin : autoByDefault,
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yMax : autoByDefault,
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yStep : autoByDefault,
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zMin : autoByDefault,
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zMax : autoByDefault,
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zStep : autoByDefault
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};
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// -----------------------------------------------------------------------------
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// Class Graph3d
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// -----------------------------------------------------------------------------
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/**
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* @constructor Graph3d
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* Graph3d displays data in 3d.
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*
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* Graph3d is developed in javascript as a Google Visualization Chart.
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*
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* @param {Element} container The DOM element in which the Graph3d will
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* be created. Normally a div element.
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* @param {DataSet | DataView | Array} [data]
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* @param {Object} [options]
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*/
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function Graph3d(container, data, options) {
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if (!(this instanceof Graph3d)) {
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throw new SyntaxError('Constructor must be called with the new operator');
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}
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// create variables and set default values
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this.containerElement = container;
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this.dataGroup = new DataGroup();
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this.dataPoints = null; // The table with point objects
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// create a frame and canvas
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this.create();
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Settings.setDefaults(DEFAULTS, this);
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// the column indexes
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this.colX = undefined;
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this.colY = undefined;
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this.colZ = undefined;
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this.colValue = undefined;
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this.colFilter = undefined;
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// TODO: customize axis range
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// apply options (also when undefined)
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this.setOptions(options);
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// apply data
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if (data) {
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this.setData(data);
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}
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}
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// Extend Graph3d with an Emitter mixin
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Emitter(Graph3d.prototype);
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/**
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* Calculate the scaling values, dependent on the range in x, y, and z direction
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*/
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Graph3d.prototype._setScale = function() {
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this.scale = new Point3d(
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1 / this.xRange.range(),
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1 / this.yRange.range(),
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1 / this.zRange.range()
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);
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// keep aspect ration between x and y scale if desired
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if (this.keepAspectRatio) {
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if (this.scale.x < this.scale.y) {
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//noinspection JSSuspiciousNameCombination
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this.scale.y = this.scale.x;
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}
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else {
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//noinspection JSSuspiciousNameCombination
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this.scale.x = this.scale.y;
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}
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}
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// scale the vertical axis
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this.scale.z *= this.verticalRatio;
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// TODO: can this be automated? verticalRatio?
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// determine scale for (optional) value
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if (this.valueRange !== undefined) {
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this.scale.value = 1 / this.valueRange.range();
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}
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// position the camera arm
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var xCenter = this.xRange.center() * this.scale.x;
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var yCenter = this.yRange.center() * this.scale.y;
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var zCenter = this.zRange.center() * this.scale.z;
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this.camera.setArmLocation(xCenter, yCenter, zCenter);
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};
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/**
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* Convert a 3D location to a 2D location on screen
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* Source: ttp://en.wikipedia.org/wiki/3D_projection
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*
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* @param {Point3d} point3d A 3D point with parameters x, y, z
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* @returns {Point2d} point2d A 2D point with parameters x, y
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*/
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Graph3d.prototype._convert3Dto2D = function(point3d) {
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var translation = this._convertPointToTranslation(point3d);
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return this._convertTranslationToScreen(translation);
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};
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/**
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* Convert a 3D location its translation seen from the camera
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* Source: http://en.wikipedia.org/wiki/3D_projection
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*
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* @param {Point3d} point3d A 3D point with parameters x, y, z
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* @returns {Point3d} translation A 3D point with parameters x, y, z This is
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* the translation of the point, seen from the
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* camera.
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*/
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Graph3d.prototype._convertPointToTranslation = function(point3d) {
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var cameraLocation = this.camera.getCameraLocation(),
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cameraRotation = this.camera.getCameraRotation(),
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ax = point3d.x * this.scale.x,
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ay = point3d.y * this.scale.y,
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az = point3d.z * this.scale.z,
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cx = cameraLocation.x,
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cy = cameraLocation.y,
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cz = cameraLocation.z,
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// calculate angles
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sinTx = Math.sin(cameraRotation.x),
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cosTx = Math.cos(cameraRotation.x),
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sinTy = Math.sin(cameraRotation.y),
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cosTy = Math.cos(cameraRotation.y),
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sinTz = Math.sin(cameraRotation.z),
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cosTz = Math.cos(cameraRotation.z),
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// calculate translation
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dx = cosTy * (sinTz * (ay - cy) + cosTz * (ax - cx)) - sinTy * (az - cz),
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dy = sinTx * (cosTy * (az - cz) + sinTy * (sinTz * (ay - cy) + cosTz * (ax - cx))) + cosTx * (cosTz * (ay - cy) - sinTz * (ax-cx)),
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dz = cosTx * (cosTy * (az - cz) + sinTy * (sinTz * (ay - cy) + cosTz * (ax - cx))) - sinTx * (cosTz * (ay - cy) - sinTz * (ax-cx));
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return new Point3d(dx, dy, dz);
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};
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/**
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* Convert a translation point to a point on the screen
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*
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* @param {Point3d} translation A 3D point with parameters x, y, z This is
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* the translation of the point, seen from the
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* camera.
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* @returns {Point2d} point2d A 2D point with parameters x, y
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*/
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Graph3d.prototype._convertTranslationToScreen = function(translation) {
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var ex = this.eye.x,
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ey = this.eye.y,
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ez = this.eye.z,
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dx = translation.x,
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dy = translation.y,
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dz = translation.z;
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// calculate position on screen from translation
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var bx;
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var by;
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if (this.showPerspective) {
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bx = (dx - ex) * (ez / dz);
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by = (dy - ey) * (ez / dz);
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}
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else {
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bx = dx * -(ez / this.camera.getArmLength());
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by = dy * -(ez / this.camera.getArmLength());
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}
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// shift and scale the point to the center of the screen
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// use the width of the graph to scale both horizontally and vertically.
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return new Point2d(
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this.currentXCenter + bx * this.frame.canvas.clientWidth,
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this.currentYCenter - by * this.frame.canvas.clientWidth);
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};
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/**
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* Calculate the translations and screen positions of all points
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*/
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Graph3d.prototype._calcTranslations = function(points) {
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for (var i = 0; i < points.length; i++) {
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var point = points[i];
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point.trans = this._convertPointToTranslation(point.point);
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point.screen = this._convertTranslationToScreen(point.trans);
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// calculate the translation of the point at the bottom (needed for sorting)
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var transBottom = this._convertPointToTranslation(point.bottom);
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point.dist = this.showPerspective ? transBottom.length() : -transBottom.z;
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}
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// sort the points on depth of their (x,y) position (not on z)
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var sortDepth = function (a, b) {
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return b.dist - a.dist;
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};
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points.sort(sortDepth);
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};
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/**
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* Check if the state is consistent for the use of the value field.
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*
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* Throws if a problem is detected.
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*/
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Graph3d.prototype._checkValueField = function (data) {
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var hasValueField = this.style === Graph3d.STYLE.BARCOLOR
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|| this.style === Graph3d.STYLE.BARSIZE
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|| this.style === Graph3d.STYLE.DOTCOLOR
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|| this.style === Graph3d.STYLE.DOTSIZE;
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if (!hasValueField) {
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return; // No need to check further
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}
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// Following field must be present for the current graph style
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if (this.colValue === undefined) {
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throw new Error('Expected data to have '
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+ ' field \'style\' '
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+ ' for graph style \'' + this.style + '\''
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);
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}
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// The data must also contain this field.
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// Note that only first data element is checked.
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if (data[0][this.colValue] === undefined) {
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throw new Error('Expected data to have '
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+ ' field \'' + this.colValue + '\' '
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+ ' for graph style \'' + this.style + '\''
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);
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}
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};
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Graph3d.prototype._initializeData = function(rawData, style) {
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this.dataGroup.initializeData(this, rawData, style);
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// Transfer min/max values to the Graph3d instance.
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// TODO: later on, all min/maxes of all datagroups will be combined here
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this.xRange = this.dataGroup.xRange;
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this.yRange = this.dataGroup.yRange;
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this.zRange = this.dataGroup.zRange;
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this.valueRange = this.dataGroup.valueRange;
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// Values currently needed but which need to be sorted out for
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// the multiple graph case.
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this.xStep = this.dataGroup.xStep;
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this.yStep = this.dataGroup.yStep;
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this.zStep = this.dataGroup.zStep;
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this.xBarWidth = this.dataGroup.xBarWidth;
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this.yBarWidth = this.dataGroup.yBarWidth;
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this.colX = this.dataGroup.colX;
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this.colY = this.dataGroup.colY;
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this.colZ = this.dataGroup.colZ;
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this.colValue = this.dataGroup.colValue;
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// Check if a filter column is provided
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var data = this.dataGroup.getDataTable();
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if (data[0].hasOwnProperty('filter')) {
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// Only set this field if it's actually present
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this.colFilter = 'filter';
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var me = this;
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if (this.dataFilter === undefined) {
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this.dataFilter = new Filter(this.dataGroup, this.colFilter, this);
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this.dataFilter.setOnLoadCallback(function() {me.redraw();});
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}
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}
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// set the scale dependent on the ranges.
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this._setScale();
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};
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/**
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* Return all data values as a list of Point3d objects
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*/
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Graph3d.prototype.getDataPoints = function(data) {
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var dataPoints = [];
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for (var i = 0; i < data.length; i++) {
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var point = new Point3d();
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point.x = data[i][this.colX] || 0;
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point.y = data[i][this.colY] || 0;
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point.z = data[i][this.colZ] || 0;
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point.data = data[i];
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if (this.colValue !== undefined) {
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point.value = data[i][this.colValue] || 0;
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}
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var obj = {};
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obj.point = point;
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obj.bottom = new Point3d(point.x, point.y, this.zRange.min);
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obj.trans = undefined;
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obj.screen = undefined;
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dataPoints.push(obj);
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}
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return dataPoints;
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};
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/**
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* Filter the data based on the current filter
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*
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* @param {Array} data
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* @returns {Array} dataPoints Array with point objects which can be drawn on
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* screen
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*/
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Graph3d.prototype._getDataPoints = function (data) {
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// TODO: store the created matrix dataPoints in the filters instead of
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// reloading each time.
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var x, y, i, z, obj, point;
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var dataPoints = [];
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if (this.style === Graph3d.STYLE.GRID ||
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this.style === Graph3d.STYLE.SURFACE) {
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// copy all values from the data table to a matrix
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// the provided values are supposed to form a grid of (x,y) positions
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// create two lists with all present x and y values
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var dataX = this.dataGroup.getDistinctValues(this.colX, data);
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var dataY = this.dataGroup.getDistinctValues(this.colY, data);
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dataPoints = this.getDataPoints(data);
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// create a grid, a 2d matrix, with all values.
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var dataMatrix = []; // temporary data matrix
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for (i = 0; i < dataPoints.length; i++) {
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obj = dataPoints[i];
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// TODO: implement Array().indexOf() for Internet Explorer
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var xIndex = dataX.indexOf(obj.point.x);
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var yIndex = dataY.indexOf(obj.point.y);
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if (dataMatrix[xIndex] === undefined) {
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dataMatrix[xIndex] = [];
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}
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dataMatrix[xIndex][yIndex] = obj;
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}
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// fill in the pointers to the neighbors.
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for (x = 0; x < dataMatrix.length; x++) {
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for (y = 0; y < dataMatrix[x].length; y++) {
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if (dataMatrix[x][y]) {
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dataMatrix[x][y].pointRight = (x < dataMatrix.length-1) ? dataMatrix[x+1][y] : undefined;
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dataMatrix[x][y].pointTop = (y < dataMatrix[x].length-1) ? dataMatrix[x][y+1] : undefined;
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dataMatrix[x][y].pointCross =
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(x < dataMatrix.length-1 && y < dataMatrix[x].length-1) ?
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dataMatrix[x+1][y+1] :
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undefined;
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}
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}
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}
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}
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else { // 'dot', 'dot-line', etc.
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this._checkValueField(data);
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dataPoints = this.getDataPoints(data);
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if (this.style === Graph3d.STYLE.LINE) {
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// Add next member points for line drawing
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for (i = 0; i < dataPoints.length; i++) {
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if (i > 0) {
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dataPoints[i - 1].pointNext = dataPoints[i];;
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}
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}
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}
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}
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return dataPoints;
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};
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|
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/**
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* Create the main frame for the Graph3d.
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*
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* This function is executed once when a Graph3d object is created. The frame
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* contains a canvas, and this canvas contains all objects like the axis and
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* nodes.
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*/
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Graph3d.prototype.create = function () {
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// remove all elements from the container element.
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while (this.containerElement.hasChildNodes()) {
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this.containerElement.removeChild(this.containerElement.firstChild);
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}
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this.frame = document.createElement('div');
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this.frame.style.position = 'relative';
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this.frame.style.overflow = 'hidden';
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// create the graph canvas (HTML canvas element)
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|
this.frame.canvas = document.createElement( 'canvas' );
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this.frame.canvas.style.position = 'relative';
|
|
this.frame.appendChild(this.frame.canvas);
|
|
//if (!this.frame.canvas.getContext) {
|
|
{
|
|
var noCanvas = document.createElement( 'DIV' );
|
|
noCanvas.style.color = 'red';
|
|
noCanvas.style.fontWeight = 'bold' ;
|
|
noCanvas.style.padding = '10px';
|
|
noCanvas.innerHTML = 'Error: your browser does not support HTML canvas';
|
|
this.frame.canvas.appendChild(noCanvas);
|
|
}
|
|
|
|
this.frame.filter = document.createElement( 'div' );
|
|
this.frame.filter.style.position = 'absolute';
|
|
this.frame.filter.style.bottom = '0px';
|
|
this.frame.filter.style.left = '0px';
|
|
this.frame.filter.style.width = '100%';
|
|
this.frame.appendChild(this.frame.filter);
|
|
|
|
// add event listeners to handle moving and zooming the contents
|
|
var me = this;
|
|
var onmousedown = function (event) {me._onMouseDown(event);};
|
|
var ontouchstart = function (event) {me._onTouchStart(event);};
|
|
var onmousewheel = function (event) {me._onWheel(event);};
|
|
var ontooltip = function (event) {me._onTooltip(event);};
|
|
var onclick = function(event) {me._onClick(event);};
|
|
// TODO: these events are never cleaned up... can give a 'memory leakage'
|
|
|
|
util.addEventListener(this.frame.canvas, 'mousedown', onmousedown);
|
|
util.addEventListener(this.frame.canvas, 'touchstart', ontouchstart);
|
|
util.addEventListener(this.frame.canvas, 'mousewheel', onmousewheel);
|
|
util.addEventListener(this.frame.canvas, 'mousemove', ontooltip);
|
|
util.addEventListener(this.frame.canvas, 'click', onclick);
|
|
|
|
// add the new graph to the container element
|
|
this.containerElement.appendChild(this.frame);
|
|
};
|
|
|
|
|
|
/**
|
|
* Set a new size for the graph
|
|
*/
|
|
Graph3d.prototype._setSize = function(width, height) {
|
|
this.frame.style.width = width;
|
|
this.frame.style.height = height;
|
|
|
|
this._resizeCanvas();
|
|
};
|
|
|
|
|
|
/**
|
|
* Resize the canvas to the current size of the frame
|
|
*/
|
|
Graph3d.prototype._resizeCanvas = function() {
|
|
this.frame.canvas.style.width = '100%';
|
|
this.frame.canvas.style.height = '100%';
|
|
|
|
this.frame.canvas.width = this.frame.canvas.clientWidth;
|
|
this.frame.canvas.height = this.frame.canvas.clientHeight;
|
|
|
|
// adjust with for margin
|
|
this.frame.filter.style.width = (this.frame.canvas.clientWidth - 2 * 10) + 'px';
|
|
};
|
|
|
|
/**
|
|
* Start animation
|
|
*/
|
|
Graph3d.prototype.animationStart = function() {
|
|
if (!this.frame.filter || !this.frame.filter.slider)
|
|
throw new Error('No animation available');
|
|
|
|
this.frame.filter.slider.play();
|
|
};
|
|
|
|
|
|
/**
|
|
* Stop animation
|
|
*/
|
|
Graph3d.prototype.animationStop = function() {
|
|
if (!this.frame.filter || !this.frame.filter.slider) return;
|
|
|
|
this.frame.filter.slider.stop();
|
|
};
|
|
|
|
|
|
/**
|
|
* Resize the center position based on the current values in this.xCenter
|
|
* and this.yCenter (which are strings with a percentage or a value
|
|
* in pixels). The center positions are the variables this.currentXCenter
|
|
* and this.currentYCenter
|
|
*/
|
|
Graph3d.prototype._resizeCenter = function() {
|
|
// calculate the horizontal center position
|
|
if (this.xCenter.charAt(this.xCenter.length-1) === '%') {
|
|
this.currentXCenter =
|
|
parseFloat(this.xCenter) / 100 *
|
|
this.frame.canvas.clientWidth;
|
|
}
|
|
else {
|
|
this.currentXCenter = parseFloat(this.xCenter); // supposed to be in px
|
|
}
|
|
|
|
// calculate the vertical center position
|
|
if (this.yCenter.charAt(this.yCenter.length-1) === '%') {
|
|
this.currentYCenter =
|
|
parseFloat(this.yCenter) / 100 *
|
|
(this.frame.canvas.clientHeight - this.frame.filter.clientHeight);
|
|
}
|
|
else {
|
|
this.currentYCenter = parseFloat(this.yCenter); // supposed to be in px
|
|
}
|
|
};
|
|
|
|
|
|
|
|
/**
|
|
* Retrieve the current camera rotation
|
|
*
|
|
* @returns {object} An object with parameters horizontal, vertical, and
|
|
* distance
|
|
*/
|
|
Graph3d.prototype.getCameraPosition = function() {
|
|
var pos = this.camera.getArmRotation();
|
|
pos.distance = this.camera.getArmLength();
|
|
return pos;
|
|
};
|
|
|
|
/**
|
|
* Load data into the 3D Graph
|
|
*/
|
|
Graph3d.prototype._readData = function(data) {
|
|
// read the data
|
|
this._initializeData(data, this.style);
|
|
|
|
|
|
if (this.dataFilter) {
|
|
// apply filtering
|
|
this.dataPoints = this.dataFilter._getDataPoints();
|
|
}
|
|
else {
|
|
// no filtering. load all data
|
|
this.dataPoints = this._getDataPoints(this.dataGroup.getDataTable());
|
|
}
|
|
|
|
// draw the filter
|
|
this._redrawFilter();
|
|
};
|
|
|
|
/**
|
|
* Replace the dataset of the Graph3d
|
|
*
|
|
* @param {Array | DataSet | DataView} data
|
|
*/
|
|
Graph3d.prototype.setData = function (data) {
|
|
this._readData(data);
|
|
this.redraw();
|
|
|
|
// start animation when option is true
|
|
if (this.animationAutoStart && this.dataFilter) {
|
|
this.animationStart();
|
|
}
|
|
};
|
|
|
|
/**
|
|
* Update the options. Options will be merged with current options
|
|
*
|
|
* @param {Object} options
|
|
*/
|
|
Graph3d.prototype.setOptions = function (options) {
|
|
var cameraPosition = undefined;
|
|
|
|
this.animationStop();
|
|
|
|
Settings.setOptions(options, this);
|
|
|
|
this.setPointDrawingMethod();
|
|
this._setSize(this.width, this.height);
|
|
|
|
// re-load the data
|
|
this.dataGroup.reload();
|
|
|
|
// start animation when option is true
|
|
if (this.animationAutoStart && this.dataFilter) {
|
|
this.animationStart();
|
|
}
|
|
};
|
|
|
|
|
|
/**
|
|
* Determine which point drawing method to use for the current graph style.
|
|
*/
|
|
Graph3d.prototype.setPointDrawingMethod = function() {
|
|
var method = undefined;
|
|
|
|
switch (this.style) {
|
|
case Graph3d.STYLE.BAR:
|
|
method = Graph3d.prototype._redrawBarGraphPoint;
|
|
break;
|
|
case Graph3d.STYLE.BARCOLOR:
|
|
method = Graph3d.prototype._redrawBarColorGraphPoint;
|
|
break;
|
|
case Graph3d.STYLE.BARSIZE:
|
|
method = Graph3d.prototype._redrawBarSizeGraphPoint;
|
|
break;
|
|
case Graph3d.STYLE.DOT:
|
|
method = Graph3d.prototype._redrawDotGraphPoint;
|
|
break;
|
|
case Graph3d.STYLE.DOTLINE:
|
|
method = Graph3d.prototype._redrawDotLineGraphPoint;
|
|
break;
|
|
case Graph3d.STYLE.DOTCOLOR:
|
|
method = Graph3d.prototype._redrawDotColorGraphPoint;
|
|
break;
|
|
case Graph3d.STYLE.DOTSIZE:
|
|
method = Graph3d.prototype._redrawDotSizeGraphPoint;
|
|
break;
|
|
case Graph3d.STYLE.SURFACE:
|
|
method = Graph3d.prototype._redrawSurfaceGraphPoint;
|
|
break;
|
|
case Graph3d.STYLE.GRID:
|
|
method = Graph3d.prototype._redrawGridGraphPoint;
|
|
break;
|
|
case Graph3d.STYLE.LINE:
|
|
method = Graph3d.prototype._redrawLineGraphPoint;
|
|
break;
|
|
default:
|
|
throw new Error('Can not determine point drawing method '
|
|
+ 'for graph style \'' + this.style + '\'');
|
|
}
|
|
|
|
this._pointDrawingMethod = method;
|
|
};
|
|
|
|
|
|
/**
|
|
* Redraw the Graph.
|
|
*/
|
|
Graph3d.prototype.redraw = function() {
|
|
if (this.dataPoints === undefined) {
|
|
throw new Error('Graph data not initialized');
|
|
}
|
|
|
|
this._resizeCanvas();
|
|
this._resizeCenter();
|
|
this._redrawSlider();
|
|
this._redrawClear();
|
|
this._redrawAxis();
|
|
|
|
this._redrawDataGraph();
|
|
|
|
this._redrawInfo();
|
|
this._redrawLegend();
|
|
};
|
|
|
|
|
|
/**
|
|
* Get drawing context without exposing canvas
|
|
*/
|
|
Graph3d.prototype._getContext = function() {
|
|
var canvas = this.frame.canvas;
|
|
var ctx = canvas.getContext('2d');
|
|
|
|
ctx.lineJoin = 'round';
|
|
ctx.lineCap = 'round';
|
|
|
|
return ctx;
|
|
};
|
|
|
|
|
|
/**
|
|
* Clear the canvas before redrawing
|
|
*/
|
|
Graph3d.prototype._redrawClear = function() {
|
|
var canvas = this.frame.canvas;
|
|
var ctx = canvas.getContext('2d');
|
|
|
|
ctx.clearRect(0, 0, canvas.width, canvas.height);
|
|
};
|
|
|
|
|
|
Graph3d.prototype._dotSize = function() {
|
|
return this.frame.clientWidth * this.dotSizeRatio;
|
|
};
|
|
|
|
|
|
/**
|
|
* Get legend width
|
|
*/
|
|
Graph3d.prototype._getLegendWidth = function() {
|
|
var width;
|
|
|
|
if (this.style === Graph3d.STYLE.DOTSIZE) {
|
|
var dotSize = this._dotSize();
|
|
//width = dotSize / 2 + dotSize * 2;
|
|
width = dotSize * this.dotSizeMaxFraction;
|
|
} else if (this.style === Graph3d.STYLE.BARSIZE) {
|
|
width = this.xBarWidth ;
|
|
} else {
|
|
width = 20;
|
|
}
|
|
return width;
|
|
}
|
|
|
|
|
|
/**
|
|
* Redraw the legend based on size, dot color, or surface height
|
|
*/
|
|
Graph3d.prototype._redrawLegend = function() {
|
|
|
|
//Return without drawing anything, if no legend is specified
|
|
if (this.showLegend !== true) {
|
|
return;
|
|
}
|
|
|
|
// Do not draw legend when graph style does not support
|
|
if (this.style === Graph3d.STYLE.LINE
|
|
|| this.style === Graph3d.STYLE.BARSIZE //TODO add legend support for BARSIZE
|
|
){
|
|
return;
|
|
}
|
|
|
|
// Legend types - size and color. Determine if size legend.
|
|
var isSizeLegend = (this.style === Graph3d.STYLE.BARSIZE
|
|
|| this.style === Graph3d.STYLE.DOTSIZE) ;
|
|
|
|
// Legend is either tracking z values or style values. This flag if false means use z values.
|
|
var isValueLegend = (this.style === Graph3d.STYLE.DOTSIZE
|
|
|| this.style === Graph3d.STYLE.DOTCOLOR
|
|
|| this.style === Graph3d.STYLE.BARCOLOR);
|
|
|
|
var height = Math.max(this.frame.clientHeight * 0.25, 100);
|
|
var top = this.margin;
|
|
var width = this._getLegendWidth() ; // px - overwritten by size legend
|
|
var right = this.frame.clientWidth - this.margin;
|
|
var left = right - width;
|
|
var bottom = top + height;
|
|
|
|
var ctx = this._getContext();
|
|
ctx.lineWidth = 1;
|
|
ctx.font = '14px arial'; // TODO: put in options
|
|
|
|
if (isSizeLegend === false) {
|
|
// draw the color bar
|
|
var ymin = 0;
|
|
var ymax = height; // Todo: make height customizable
|
|
var y;
|
|
|
|
for (y = ymin; y < ymax; y++) {
|
|
var f = (y - ymin) / (ymax - ymin);
|
|
var hue = f * 240;
|
|
var color = this._hsv2rgb(hue, 1, 1);
|
|
|
|
ctx.strokeStyle = color;
|
|
ctx.beginPath();
|
|
ctx.moveTo(left, top + y);
|
|
ctx.lineTo(right, top + y);
|
|
ctx.stroke();
|
|
}
|
|
ctx.strokeStyle = this.axisColor;
|
|
ctx.strokeRect(left, top, width, height);
|
|
|
|
} else {
|
|
|
|
// draw the size legend box
|
|
var widthMin;
|
|
if (this.style === Graph3d.STYLE.DOTSIZE) {
|
|
// Get the proportion to max and min right
|
|
widthMin = width * (this.dotSizeMinFraction / this.dotSizeMaxFraction);
|
|
} else if (this.style === Graph3d.STYLE.BARSIZE) {
|
|
//widthMin = this.xBarWidth * 0.2 this is wrong - barwidth measures in terms of xvalues
|
|
}
|
|
ctx.strokeStyle = this.axisColor;
|
|
ctx.fillStyle = this.dataColor.fill;
|
|
ctx.beginPath();
|
|
ctx.moveTo(left, top);
|
|
ctx.lineTo(right, top);
|
|
ctx.lineTo(left + widthMin, bottom);
|
|
ctx.lineTo(left, bottom);
|
|
ctx.closePath();
|
|
ctx.fill();
|
|
ctx.stroke();
|
|
}
|
|
|
|
// print value text along the legend edge
|
|
var gridLineLen = 5; // px
|
|
|
|
var legendMin = isValueLegend ? this.valueRange.min : this.zRange.min;
|
|
var legendMax = isValueLegend ? this.valueRange.max : this.zRange.max;
|
|
var step = new StepNumber(legendMin, legendMax, (legendMax-legendMin)/5, true);
|
|
step.start(true);
|
|
|
|
var y;
|
|
var from;
|
|
var to;
|
|
while (!step.end()) {
|
|
y = bottom - (step.getCurrent() - legendMin) / (legendMax - legendMin) * height;
|
|
from = new Point2d(left - gridLineLen, y);
|
|
to = new Point2d(left, y);
|
|
this._line(ctx, from, to);
|
|
|
|
ctx.textAlign = 'right';
|
|
ctx.textBaseline = 'middle';
|
|
ctx.fillStyle = this.axisColor;
|
|
ctx.fillText(step.getCurrent(), left - 2 * gridLineLen, y);
|
|
|
|
step.next();
|
|
}
|
|
|
|
ctx.textAlign = 'right';
|
|
ctx.textBaseline = 'top';
|
|
var label = this.legendLabel;
|
|
ctx.fillText(label, right, bottom + this.margin);
|
|
};
|
|
|
|
|
|
/**
|
|
* Redraw the filter
|
|
*/
|
|
Graph3d.prototype._redrawFilter = function() {
|
|
this.frame.filter.innerHTML = '';
|
|
|
|
if (this.dataFilter) {
|
|
var options = {
|
|
'visible': this.showAnimationControls
|
|
};
|
|
var slider = new Slider(this.frame.filter, options);
|
|
this.frame.filter.slider = slider;
|
|
|
|
// TODO: css here is not nice here...
|
|
this.frame.filter.style.padding = '10px';
|
|
//this.frame.filter.style.backgroundColor = '#EFEFEF';
|
|
|
|
slider.setValues(this.dataFilter.values);
|
|
slider.setPlayInterval(this.animationInterval);
|
|
|
|
// create an event handler
|
|
var me = this;
|
|
var onchange = function () {
|
|
var index = slider.getIndex();
|
|
|
|
me.dataFilter.selectValue(index);
|
|
me.dataPoints = me.dataFilter._getDataPoints();
|
|
|
|
me.redraw();
|
|
};
|
|
slider.setOnChangeCallback(onchange);
|
|
}
|
|
else {
|
|
this.frame.filter.slider = undefined;
|
|
}
|
|
};
|
|
|
|
/**
|
|
* Redraw the slider
|
|
*/
|
|
Graph3d.prototype._redrawSlider = function() {
|
|
if ( this.frame.filter.slider !== undefined) {
|
|
this.frame.filter.slider.redraw();
|
|
}
|
|
};
|
|
|
|
|
|
/**
|
|
* Redraw common information
|
|
*/
|
|
Graph3d.prototype._redrawInfo = function() {
|
|
if (this.dataFilter) {
|
|
var ctx = this._getContext();
|
|
|
|
ctx.font = '14px arial'; // TODO: put in options
|
|
ctx.lineStyle = 'gray';
|
|
ctx.fillStyle = 'gray';
|
|
ctx.textAlign = 'left';
|
|
ctx.textBaseline = 'top';
|
|
|
|
var x = this.margin;
|
|
var y = this.margin;
|
|
ctx.fillText(this.dataFilter.getLabel() + ': ' + this.dataFilter.getSelectedValue(), x, y);
|
|
}
|
|
};
|
|
|
|
|
|
/**
|
|
* Draw a line between 2d points 'from' and 'to'.
|
|
*
|
|
* If stroke style specified, set that as well.
|
|
*/
|
|
Graph3d.prototype._line = function(ctx, from, to, strokeStyle) {
|
|
if (strokeStyle !== undefined) {
|
|
ctx.strokeStyle = strokeStyle;
|
|
}
|
|
|
|
ctx.beginPath();
|
|
ctx.moveTo(from.x, from.y);
|
|
ctx.lineTo(to.x , to.y );
|
|
ctx.stroke();
|
|
}
|
|
|
|
|
|
Graph3d.prototype.drawAxisLabelX = function(ctx, point3d, text, armAngle, yMargin) {
|
|
if (yMargin === undefined) {
|
|
yMargin = 0;
|
|
}
|
|
|
|
var point2d = this._convert3Dto2D(point3d);
|
|
|
|
if (Math.cos(armAngle * 2) > 0) {
|
|
ctx.textAlign = 'center';
|
|
ctx.textBaseline = 'top';
|
|
point2d.y += yMargin;
|
|
}
|
|
else if (Math.sin(armAngle * 2) < 0){
|
|
ctx.textAlign = 'right';
|
|
ctx.textBaseline = 'middle';
|
|
}
|
|
else {
|
|
ctx.textAlign = 'left';
|
|
ctx.textBaseline = 'middle';
|
|
}
|
|
|
|
ctx.fillStyle = this.axisColor;
|
|
ctx.fillText(text, point2d.x, point2d.y);
|
|
}
|
|
|
|
|
|
Graph3d.prototype.drawAxisLabelY = function(ctx, point3d, text, armAngle, yMargin) {
|
|
if (yMargin === undefined) {
|
|
yMargin = 0;
|
|
}
|
|
|
|
var point2d = this._convert3Dto2D(point3d);
|
|
|
|
if (Math.cos(armAngle * 2) < 0) {
|
|
ctx.textAlign = 'center';
|
|
ctx.textBaseline = 'top';
|
|
point2d.y += yMargin;
|
|
}
|
|
else if (Math.sin(armAngle * 2) > 0){
|
|
ctx.textAlign = 'right';
|
|
ctx.textBaseline = 'middle';
|
|
}
|
|
else {
|
|
ctx.textAlign = 'left';
|
|
ctx.textBaseline = 'middle';
|
|
}
|
|
|
|
ctx.fillStyle = this.axisColor;
|
|
ctx.fillText(text, point2d.x, point2d.y);
|
|
}
|
|
|
|
|
|
Graph3d.prototype.drawAxisLabelZ = function(ctx, point3d, text, offset) {
|
|
if (offset === undefined) {
|
|
offset = 0;
|
|
}
|
|
|
|
var point2d = this._convert3Dto2D(point3d);
|
|
ctx.textAlign = 'right';
|
|
ctx.textBaseline = 'middle';
|
|
ctx.fillStyle = this.axisColor;
|
|
ctx.fillText(text, point2d.x - offset, point2d.y);
|
|
};
|
|
|
|
|
|
/**
|
|
|
|
|
|
/**
|
|
* Draw a line between 2d points 'from' and 'to'.
|
|
*
|
|
* If stroke style specified, set that as well.
|
|
*/
|
|
Graph3d.prototype._line3d = function(ctx, from, to, strokeStyle) {
|
|
var from2d = this._convert3Dto2D(from);
|
|
var to2d = this._convert3Dto2D(to);
|
|
|
|
this._line(ctx, from2d, to2d, strokeStyle);
|
|
}
|
|
|
|
|
|
/**
|
|
* Redraw the axis
|
|
*/
|
|
Graph3d.prototype._redrawAxis = function() {
|
|
var ctx = this._getContext(),
|
|
from, to, step, prettyStep,
|
|
text, xText, yText, zText,
|
|
offset, xOffset, yOffset;
|
|
|
|
// TODO: get the actual rendered style of the containerElement
|
|
//ctx.font = this.containerElement.style.font;
|
|
ctx.font = 24 / this.camera.getArmLength() + 'px arial';
|
|
|
|
// calculate the length for the short grid lines
|
|
var gridLenX = 0.025 / this.scale.x;
|
|
var gridLenY = 0.025 / this.scale.y;
|
|
var textMargin = 5 / this.camera.getArmLength(); // px
|
|
var armAngle = this.camera.getArmRotation().horizontal;
|
|
var armVector = new Point2d(Math.cos(armAngle), Math.sin(armAngle));
|
|
|
|
var xRange = this.xRange;
|
|
var yRange = this.yRange;
|
|
var zRange = this.zRange;
|
|
|
|
// draw x-grid lines
|
|
ctx.lineWidth = 1;
|
|
prettyStep = (this.defaultXStep === undefined);
|
|
step = new StepNumber(xRange.min, xRange.max, this.xStep, prettyStep);
|
|
step.start(true);
|
|
|
|
while (!step.end()) {
|
|
var x = step.getCurrent();
|
|
|
|
if (this.showGrid) {
|
|
from = new Point3d(x, yRange.min, zRange.min);
|
|
to = new Point3d(x, yRange.max, zRange.min);
|
|
this._line3d(ctx, from, to, this.gridColor);
|
|
}
|
|
else if (this.showXAxis) {
|
|
from = new Point3d(x, yRange.min, zRange.min);
|
|
to = new Point3d(x, yRange.min+gridLenX, zRange.min);
|
|
this._line3d(ctx, from, to, this.axisColor);
|
|
|
|
from = new Point3d(x, yRange.max, zRange.min);
|
|
to = new Point3d(x, yRange.max-gridLenX, zRange.min);
|
|
this._line3d(ctx, from, to, this.axisColor);
|
|
}
|
|
|
|
if (this.showXAxis) {
|
|
yText = (armVector.x > 0) ? yRange.min : yRange.max;
|
|
var point3d = new Point3d(x, yText, zRange.min);
|
|
var msg = ' ' + this.xValueLabel(x) + ' ';
|
|
this.drawAxisLabelX(ctx, point3d, msg, armAngle, textMargin);
|
|
}
|
|
|
|
step.next();
|
|
}
|
|
|
|
// draw y-grid lines
|
|
ctx.lineWidth = 1;
|
|
prettyStep = (this.defaultYStep === undefined);
|
|
step = new StepNumber(yRange.min, yRange.max, this.yStep, prettyStep);
|
|
step.start(true);
|
|
|
|
while (!step.end()) {
|
|
var y = step.getCurrent();
|
|
|
|
if (this.showGrid) {
|
|
from = new Point3d(xRange.min, y, zRange.min);
|
|
to = new Point3d(xRange.max, y, zRange.min);
|
|
this._line3d(ctx, from, to, this.gridColor);
|
|
}
|
|
else if (this.showYAxis){
|
|
from = new Point3d(xRange.min, y, zRange.min);
|
|
to = new Point3d(xRange.min+gridLenY, y, zRange.min);
|
|
this._line3d(ctx, from, to, this.axisColor);
|
|
|
|
from = new Point3d(xRange.max, y, zRange.min);
|
|
to = new Point3d(xRange.max-gridLenY, y, zRange.min);
|
|
this._line3d(ctx, from, to, this.axisColor);
|
|
}
|
|
|
|
if (this.showYAxis) {
|
|
xText = (armVector.y > 0) ? xRange.min : xRange.max;
|
|
point3d = new Point3d(xText, y, zRange.min);
|
|
var msg = ' ' + this.yValueLabel(y) + ' ';
|
|
this.drawAxisLabelY(ctx, point3d, msg, armAngle, textMargin);
|
|
}
|
|
|
|
step.next();
|
|
}
|
|
|
|
// draw z-grid lines and axis
|
|
if (this.showZAxis) {
|
|
ctx.lineWidth = 1;
|
|
prettyStep = (this.defaultZStep === undefined);
|
|
step = new StepNumber(zRange.min, zRange.max, this.zStep, prettyStep);
|
|
step.start(true);
|
|
|
|
xText = (armVector.x > 0) ? xRange.min : xRange.max;
|
|
yText = (armVector.y < 0) ? yRange.min : yRange.max;
|
|
|
|
while (!step.end()) {
|
|
var z = step.getCurrent();
|
|
|
|
// TODO: make z-grid lines really 3d?
|
|
var from3d = new Point3d(xText, yText, z);
|
|
var from2d = this._convert3Dto2D(from3d);
|
|
to = new Point2d(from2d.x - textMargin, from2d.y);
|
|
this._line(ctx, from2d, to, this.axisColor);
|
|
|
|
var msg = this.zValueLabel(z) + ' ';
|
|
this.drawAxisLabelZ(ctx, from3d, msg, 5);
|
|
|
|
step.next();
|
|
}
|
|
|
|
ctx.lineWidth = 1;
|
|
from = new Point3d(xText, yText, zRange.min);
|
|
to = new Point3d(xText, yText, zRange.max);
|
|
this._line3d(ctx, from, to, this.axisColor);
|
|
}
|
|
|
|
// draw x-axis
|
|
if (this.showXAxis) {
|
|
var xMin2d;
|
|
var xMax2d;
|
|
ctx.lineWidth = 1;
|
|
|
|
// line at yMin
|
|
xMin2d = new Point3d(xRange.min, yRange.min, zRange.min);
|
|
xMax2d = new Point3d(xRange.max, yRange.min, zRange.min);
|
|
this._line3d(ctx, xMin2d, xMax2d, this.axisColor);
|
|
// line at ymax
|
|
xMin2d = new Point3d(xRange.min, yRange.max, zRange.min);
|
|
xMax2d = new Point3d(xRange.max, yRange.max, zRange.min);
|
|
this._line3d(ctx, xMin2d, xMax2d, this.axisColor);
|
|
}
|
|
|
|
// draw y-axis
|
|
if (this.showYAxis) {
|
|
ctx.lineWidth = 1;
|
|
// line at xMin
|
|
from = new Point3d(xRange.min, yRange.min, zRange.min);
|
|
to = new Point3d(xRange.min, yRange.max, zRange.min);
|
|
this._line3d(ctx, from, to, this.axisColor);
|
|
// line at xMax
|
|
from = new Point3d(xRange.max, yRange.min, zRange.min);
|
|
to = new Point3d(xRange.max, yRange.max, zRange.min);
|
|
this._line3d(ctx, from, to, this.axisColor);
|
|
}
|
|
|
|
// draw x-label
|
|
var xLabel = this.xLabel;
|
|
if (xLabel.length > 0 && this.showXAxis) {
|
|
yOffset = 0.1 / this.scale.y;
|
|
xText = (xRange.max + 3*xRange.min)/4;
|
|
yText = (armVector.x > 0) ? yRange.min - yOffset: yRange.max + yOffset;
|
|
text = new Point3d(xText, yText, zRange.min);
|
|
this.drawAxisLabelX(ctx, text, xLabel, armAngle);
|
|
}
|
|
|
|
// draw y-label
|
|
var yLabel = this.yLabel;
|
|
if (yLabel.length > 0 && this.showYAxis) {
|
|
xOffset = 0.1 / this.scale.x;
|
|
xText = (armVector.y > 0) ? xRange.min - xOffset : xRange.max + xOffset;
|
|
yText = (yRange.max + 3*yRange.min)/4;
|
|
text = new Point3d(xText, yText, zRange.min);
|
|
|
|
this.drawAxisLabelY(ctx, text, yLabel, armAngle);
|
|
}
|
|
|
|
// draw z-label
|
|
var zLabel = this.zLabel;
|
|
if (zLabel.length > 0 && this.showZAxis) {
|
|
offset = 30; // pixels. // TODO: relate to the max width of the values on the z axis?
|
|
xText = (armVector.x > 0) ? xRange.min : xRange.max;
|
|
yText = (armVector.y < 0) ? yRange.min : yRange.max;
|
|
zText = (zRange.max + 3*zRange.min)/4;
|
|
text = new Point3d(xText, yText, zText);
|
|
|
|
this.drawAxisLabelZ(ctx, text, zLabel, offset);
|
|
}
|
|
};
|
|
|
|
/**
|
|
* Calculate the color based on the given value.
|
|
* @param {Number} H Hue, a value be between 0 and 360
|
|
* @param {Number} S Saturation, a value between 0 and 1
|
|
* @param {Number} V Value, a value between 0 and 1
|
|
*/
|
|
Graph3d.prototype._hsv2rgb = function(H, S, V) {
|
|
var R, G, B, C, Hi, X;
|
|
|
|
C = V * S;
|
|
Hi = Math.floor(H/60); // hi = 0,1,2,3,4,5
|
|
X = C * (1 - Math.abs(((H/60) % 2) - 1));
|
|
|
|
switch (Hi) {
|
|
case 0: R = C; G = X; B = 0; break;
|
|
case 1: R = X; G = C; B = 0; break;
|
|
case 2: R = 0; G = C; B = X; break;
|
|
case 3: R = 0; G = X; B = C; break;
|
|
case 4: R = X; G = 0; B = C; break;
|
|
case 5: R = C; G = 0; B = X; break;
|
|
|
|
default: R = 0; G = 0; B = 0; break;
|
|
}
|
|
|
|
return 'RGB(' + parseInt(R*255) + ',' + parseInt(G*255) + ',' + parseInt(B*255) + ')';
|
|
};
|
|
|
|
|
|
Graph3d.prototype._getStrokeWidth = function(point) {
|
|
if (point !== undefined) {
|
|
if (this.showPerspective) {
|
|
return 1 / -point.trans.z * this.dataColor.strokeWidth;
|
|
}
|
|
else {
|
|
return -(this.eye.z / this.camera.getArmLength()) * this.dataColor.strokeWidth;
|
|
}
|
|
}
|
|
|
|
return this.dataColor.strokeWidth;
|
|
};
|
|
|
|
|
|
// -----------------------------------------------------------------------------
|
|
// Drawing primitives for the graphs
|
|
// -----------------------------------------------------------------------------
|
|
|
|
|
|
/**
|
|
* Draw a bar element in the view with the given properties.
|
|
*/
|
|
Graph3d.prototype._redrawBar = function(ctx, point, xWidth, yWidth, color, borderColor) {
|
|
var i, j, surface;
|
|
|
|
// calculate all corner points
|
|
var me = this;
|
|
var point3d = point.point;
|
|
var zMin = this.zRange.min;
|
|
var top = [
|
|
{point: new Point3d(point3d.x - xWidth, point3d.y - yWidth, point3d.z)},
|
|
{point: new Point3d(point3d.x + xWidth, point3d.y - yWidth, point3d.z)},
|
|
{point: new Point3d(point3d.x + xWidth, point3d.y + yWidth, point3d.z)},
|
|
{point: new Point3d(point3d.x - xWidth, point3d.y + yWidth, point3d.z)}
|
|
];
|
|
var bottom = [
|
|
{point: new Point3d(point3d.x - xWidth, point3d.y - yWidth, zMin)},
|
|
{point: new Point3d(point3d.x + xWidth, point3d.y - yWidth, zMin)},
|
|
{point: new Point3d(point3d.x + xWidth, point3d.y + yWidth, zMin)},
|
|
{point: new Point3d(point3d.x - xWidth, point3d.y + yWidth, zMin)}
|
|
];
|
|
|
|
// calculate screen location of the points
|
|
top.forEach(function (obj) {
|
|
obj.screen = me._convert3Dto2D(obj.point);
|
|
});
|
|
bottom.forEach(function (obj) {
|
|
obj.screen = me._convert3Dto2D(obj.point);
|
|
});
|
|
|
|
// create five sides, calculate both corner points and center points
|
|
var surfaces = [
|
|
{corners: top, center: Point3d.avg(bottom[0].point, bottom[2].point)},
|
|
{corners: [top[0], top[1], bottom[1], bottom[0]], center: Point3d.avg(bottom[1].point, bottom[0].point)},
|
|
{corners: [top[1], top[2], bottom[2], bottom[1]], center: Point3d.avg(bottom[2].point, bottom[1].point)},
|
|
{corners: [top[2], top[3], bottom[3], bottom[2]], center: Point3d.avg(bottom[3].point, bottom[2].point)},
|
|
{corners: [top[3], top[0], bottom[0], bottom[3]], center: Point3d.avg(bottom[0].point, bottom[3].point)}
|
|
];
|
|
point.surfaces = surfaces;
|
|
|
|
// calculate the distance of each of the surface centers to the camera
|
|
for (j = 0; j < surfaces.length; j++) {
|
|
surface = surfaces[j];
|
|
var transCenter = this._convertPointToTranslation(surface.center);
|
|
surface.dist = this.showPerspective ? transCenter.length() : -transCenter.z;
|
|
// TODO: this dept calculation doesn't work 100% of the cases due to perspective,
|
|
// but the current solution is fast/simple and works in 99.9% of all cases
|
|
// the issue is visible in example 14, with graph.setCameraPosition({horizontal: 2.97, vertical: 0.5, distance: 0.9})
|
|
}
|
|
|
|
// order the surfaces by their (translated) depth
|
|
surfaces.sort(function (a, b) {
|
|
var diff = b.dist - a.dist;
|
|
if (diff) return diff;
|
|
|
|
// if equal depth, sort the top surface last
|
|
if (a.corners === top) return 1;
|
|
if (b.corners === top) return -1;
|
|
|
|
// both are equal
|
|
return 0;
|
|
});
|
|
|
|
// draw the ordered surfaces
|
|
ctx.lineWidth = this._getStrokeWidth(point);
|
|
ctx.strokeStyle = borderColor;
|
|
ctx.fillStyle = color;
|
|
// NOTE: we start at j=2 instead of j=0 as we don't need to draw the two surfaces at the backside
|
|
for (j = 2; j < surfaces.length; j++) {
|
|
surface = surfaces[j];
|
|
this._polygon(ctx, surface.corners);
|
|
}
|
|
};
|
|
|
|
|
|
/**
|
|
* Draw a polygon using the passed points and fill it with the passed style and stroke.
|
|
*
|
|
* @param points an array of points.
|
|
* @param fillStyle optional; the fill style to set
|
|
* @param strokeStyle optional; the stroke style to set
|
|
*/
|
|
Graph3d.prototype._polygon = function(ctx, points, fillStyle, strokeStyle) {
|
|
if (points.length < 2) {
|
|
return;
|
|
}
|
|
|
|
if (fillStyle !== undefined) {
|
|
ctx.fillStyle = fillStyle;
|
|
}
|
|
if (strokeStyle !== undefined) {
|
|
ctx.strokeStyle = strokeStyle;
|
|
}
|
|
ctx.beginPath();
|
|
ctx.moveTo(points[0].screen.x, points[0].screen.y);
|
|
|
|
for (var i = 1; i < points.length; ++i) {
|
|
var point = points[i];
|
|
ctx.lineTo(point.screen.x, point.screen.y);
|
|
}
|
|
|
|
ctx.closePath();
|
|
ctx.fill();
|
|
ctx.stroke(); // TODO: only draw stroke when strokeWidth > 0
|
|
};
|
|
|
|
|
|
/**
|
|
* @param size optional; if not specified use value from 'this._dotSize()`
|
|
*/
|
|
Graph3d.prototype._drawCircle = function(ctx, point, color, borderColor, size) {
|
|
var radius = this._calcRadius(point, size);
|
|
|
|
ctx.lineWidth = this._getStrokeWidth(point);
|
|
ctx.strokeStyle = borderColor;
|
|
ctx.fillStyle = color;
|
|
ctx.beginPath();
|
|
ctx.arc(point.screen.x, point.screen.y, radius, 0, Math.PI*2, true);
|
|
ctx.fill();
|
|
ctx.stroke();
|
|
};
|
|
|
|
|
|
/**
|
|
* Determine the colors for the 'regular' graph styles.
|
|
*/
|
|
Graph3d.prototype._getColorsRegular = function(point) {
|
|
// calculate Hue from the current value. At zMin the hue is 240, at zMax the hue is 0
|
|
var hue = (1 - (point.point.z - this.zRange.min) * this.scale.z / this.verticalRatio) * 240;
|
|
var color = this._hsv2rgb(hue, 1, 1);
|
|
var borderColor = this._hsv2rgb(hue, 1, 0.8);
|
|
|
|
return {
|
|
fill : color,
|
|
border: borderColor
|
|
};
|
|
};
|
|
|
|
|
|
/**
|
|
* Get the colors for the 'color' graph styles.
|
|
* These styles are currently: 'bar-color' and 'dot-color'
|
|
* Color may be set as a string representation of HTML color, like #ff00ff,
|
|
* or calculated from a number, for example, distance from this point
|
|
* The first option is useful when we have some pre-given legend, to which we have to adjust ourselves
|
|
* The second option is useful when we are interested in automatically setting the color, from some value,
|
|
* using some color scale
|
|
*/
|
|
Graph3d.prototype._getColorsColor = function(point) {
|
|
// calculate the color based on the value
|
|
var color, borderColor;
|
|
|
|
if (typeof point.point.value === "string") {
|
|
color = point.point.value;
|
|
borderColor = point.point.value;
|
|
}
|
|
else {
|
|
var hue = (1 - (point.point.value - this.valueRange.min) * this.scale.value) * 240;
|
|
color = this._hsv2rgb(hue, 1, 1);
|
|
borderColor = this._hsv2rgb(hue, 1, 0.8);
|
|
}
|
|
return {
|
|
fill : color,
|
|
border : borderColor
|
|
};
|
|
};
|
|
|
|
|
|
/**
|
|
* Get the colors for the 'size' graph styles.
|
|
* These styles are currently: 'bar-size' and 'dot-size'
|
|
*/
|
|
Graph3d.prototype._getColorsSize = function() {
|
|
return {
|
|
fill : this.dataColor.fill,
|
|
border : this.dataColor.stroke
|
|
};
|
|
};
|
|
|
|
|
|
/**
|
|
* Determine the size of a point on-screen, as determined by the
|
|
* distance to the camera.
|
|
*
|
|
* @param size the size that needs to be translated to screen coordinates.
|
|
* optional; if not passed, use the default point size.
|
|
*/
|
|
Graph3d.prototype._calcRadius = function(point, size) {
|
|
if (size === undefined) {
|
|
size = this._dotSize();
|
|
}
|
|
|
|
var radius;
|
|
if (this.showPerspective) {
|
|
radius = size / -point.trans.z;
|
|
}
|
|
else {
|
|
radius = size * -(this.eye.z / this.camera.getArmLength());
|
|
}
|
|
if (radius < 0) {
|
|
radius = 0;
|
|
}
|
|
|
|
return radius;
|
|
};
|
|
|
|
|
|
// -----------------------------------------------------------------------------
|
|
// Methods for drawing points per graph style.
|
|
// -----------------------------------------------------------------------------
|
|
|
|
|
|
/**
|
|
* Draw single datapoint for graph style 'bar'.
|
|
*/
|
|
Graph3d.prototype._redrawBarGraphPoint = function(ctx, point) {
|
|
var xWidth = this.xBarWidth / 2;
|
|
var yWidth = this.yBarWidth / 2;
|
|
var colors = this._getColorsRegular(point);
|
|
|
|
this._redrawBar(ctx, point, xWidth, yWidth, colors.fill, colors.border);
|
|
};
|
|
|
|
|
|
/**
|
|
* Draw single datapoint for graph style 'bar-color'.
|
|
*/
|
|
Graph3d.prototype._redrawBarColorGraphPoint = function(ctx, point) {
|
|
var xWidth = this.xBarWidth / 2;
|
|
var yWidth = this.yBarWidth / 2;
|
|
var colors = this._getColorsColor(point);
|
|
|
|
this._redrawBar(ctx, point, xWidth, yWidth, colors.fill, colors.border);
|
|
};
|
|
|
|
|
|
/**
|
|
* Draw single datapoint for graph style 'bar-size'.
|
|
*/
|
|
Graph3d.prototype._redrawBarSizeGraphPoint = function(ctx, point) {
|
|
// calculate size for the bar
|
|
var fraction = (point.point.value - this.valueRange.min) / this.valueRange.range();
|
|
var xWidth = (this.xBarWidth / 2) * (fraction * 0.8 + 0.2);
|
|
var yWidth = (this.yBarWidth / 2) * (fraction * 0.8 + 0.2);
|
|
|
|
var colors = this._getColorsSize();
|
|
|
|
this._redrawBar(ctx, point, xWidth, yWidth, colors.fill, colors.border);
|
|
};
|
|
|
|
|
|
/**
|
|
* Draw single datapoint for graph style 'dot'.
|
|
*/
|
|
Graph3d.prototype._redrawDotGraphPoint = function(ctx, point) {
|
|
var colors = this._getColorsRegular(point);
|
|
|
|
this._drawCircle(ctx, point, colors.fill, colors.border);
|
|
};
|
|
|
|
|
|
/**
|
|
* Draw single datapoint for graph style 'dot-line'.
|
|
*/
|
|
Graph3d.prototype._redrawDotLineGraphPoint = function(ctx, point) {
|
|
// draw a vertical line from the XY-plane to the graph value
|
|
var from = this._convert3Dto2D(point.bottom);
|
|
ctx.lineWidth = 1;
|
|
this._line(ctx, from, point.screen, this.gridColor);
|
|
|
|
this._redrawDotGraphPoint(ctx, point);
|
|
};
|
|
|
|
|
|
/**
|
|
* Draw single datapoint for graph style 'dot-color'.
|
|
*/
|
|
Graph3d.prototype._redrawDotColorGraphPoint = function(ctx, point) {
|
|
var colors = this._getColorsColor(point);
|
|
|
|
this._drawCircle(ctx, point, colors.fill, colors.border);
|
|
};
|
|
|
|
|
|
/**
|
|
* Draw single datapoint for graph style 'dot-size'.
|
|
*/
|
|
Graph3d.prototype._redrawDotSizeGraphPoint = function(ctx, point) {
|
|
var dotSize = this._dotSize();
|
|
var fraction = (point.point.value - this.valueRange.min) / this.valueRange.range();
|
|
|
|
var sizeMin = dotSize*this.dotSizeMinFraction;
|
|
var sizeRange = dotSize*this.dotSizeMaxFraction - sizeMin;
|
|
var size = sizeMin + sizeRange*fraction;
|
|
|
|
var colors = this._getColorsSize();
|
|
|
|
this._drawCircle(ctx, point, colors.fill, colors.border, size);
|
|
};
|
|
|
|
|
|
/**
|
|
* Draw single datapoint for graph style 'surface'.
|
|
*/
|
|
Graph3d.prototype._redrawSurfaceGraphPoint = function(ctx, point) {
|
|
var right = point.pointRight;
|
|
var top = point.pointTop;
|
|
var cross = point.pointCross;
|
|
|
|
if (point === undefined || right === undefined || top === undefined || cross === undefined) {
|
|
return;
|
|
}
|
|
|
|
var topSideVisible = true;
|
|
var fillStyle;
|
|
var strokeStyle;
|
|
var lineWidth;
|
|
|
|
if (this.showGrayBottom || this.showShadow) {
|
|
// calculate the cross product of the two vectors from center
|
|
// to left and right, in order to know whether we are looking at the
|
|
// bottom or at the top side. We can also use the cross product
|
|
// for calculating light intensity
|
|
var aDiff = Point3d.subtract(cross.trans, point.trans);
|
|
var bDiff = Point3d.subtract(top.trans, right.trans);
|
|
var crossproduct = Point3d.crossProduct(aDiff, bDiff);
|
|
var len = crossproduct.length();
|
|
// FIXME: there is a bug with determining the surface side (shadow or colored)
|
|
|
|
topSideVisible = (crossproduct.z > 0);
|
|
}
|
|
|
|
if (topSideVisible) {
|
|
|
|
// calculate Hue from the current value. At zMin the hue is 240, at zMax the hue is 0
|
|
var zAvg = (point.point.z + right.point.z + top.point.z + cross.point.z) / 4;
|
|
var h = (1 - (zAvg - this.zRange.min) * this.scale.z / this.verticalRatio) * 240;
|
|
var s = 1; // saturation
|
|
var v;
|
|
|
|
if (this.showShadow) {
|
|
v = Math.min(1 + (crossproduct.x / len) / 2, 1); // value. TODO: scale
|
|
fillStyle = this._hsv2rgb(h, s, v);
|
|
strokeStyle = fillStyle;
|
|
}
|
|
else {
|
|
v = 1;
|
|
fillStyle = this._hsv2rgb(h, s, v);
|
|
strokeStyle = this.axisColor; // TODO: should be customizable
|
|
}
|
|
}
|
|
else {
|
|
fillStyle = 'gray';
|
|
strokeStyle = this.axisColor;
|
|
}
|
|
|
|
ctx.lineWidth = this._getStrokeWidth(point);
|
|
// TODO: only draw stroke when strokeWidth > 0
|
|
|
|
var points = [point, right, cross, top];
|
|
this._polygon(ctx, points, fillStyle, strokeStyle);
|
|
};
|
|
|
|
|
|
/**
|
|
* Helper method for _redrawGridGraphPoint()
|
|
*/
|
|
Graph3d.prototype._drawGridLine = function(ctx, from, to) {
|
|
if (from === undefined || to === undefined) {
|
|
return;
|
|
}
|
|
|
|
// calculate Hue from the current value. At zMin the hue is 240, at zMax the hue is 0
|
|
var zAvg = (from.point.z + to.point.z) / 2;
|
|
var h = (1 - (zAvg - this.zRange.min) * this.scale.z / this.verticalRatio) * 240;
|
|
|
|
ctx.lineWidth = this._getStrokeWidth(from) * 2;
|
|
ctx.strokeStyle = this._hsv2rgb(h, 1, 1);
|
|
this._line(ctx, from.screen, to.screen);
|
|
};
|
|
|
|
|
|
/**
|
|
* Draw single datapoint for graph style 'Grid'.
|
|
*/
|
|
Graph3d.prototype._redrawGridGraphPoint = function(ctx, point) {
|
|
this._drawGridLine(ctx, point, point.pointRight);
|
|
this._drawGridLine(ctx, point, point.pointTop);
|
|
};
|
|
|
|
|
|
/**
|
|
* Draw single datapoint for graph style 'line'.
|
|
*/
|
|
Graph3d.prototype._redrawLineGraphPoint = function(ctx, point) {
|
|
if (point.pointNext === undefined) {
|
|
return;
|
|
}
|
|
|
|
ctx.lineWidth = this._getStrokeWidth(point);
|
|
ctx.strokeStyle = this.dataColor.stroke;
|
|
|
|
this._line(ctx, point.screen, point.pointNext.screen);
|
|
};
|
|
|
|
|
|
/**
|
|
* Draw all datapoints for currently selected graph style.
|
|
*
|
|
*/
|
|
Graph3d.prototype._redrawDataGraph = function() {
|
|
var ctx = this._getContext();
|
|
var i;
|
|
|
|
if (this.dataPoints === undefined || this.dataPoints.length <= 0)
|
|
return; // TODO: throw exception?
|
|
|
|
this._calcTranslations(this.dataPoints);
|
|
|
|
for (i = 0; i < this.dataPoints.length; i++) {
|
|
var point = this.dataPoints[i];
|
|
|
|
// Using call() ensures that the correct context is used
|
|
this._pointDrawingMethod.call(this, ctx, point);
|
|
}
|
|
};
|
|
|
|
|
|
// -----------------------------------------------------------------------------
|
|
// End methods for drawing points per graph style.
|
|
// -----------------------------------------------------------------------------
|
|
|
|
/**
|
|
* Store startX, startY and startOffset for mouse operations
|
|
*
|
|
* @param {Event} event The event that occurred
|
|
*/
|
|
Graph3d.prototype._storeMousePosition = function(event) {
|
|
// get mouse position (different code for IE and all other browsers)
|
|
this.startMouseX = getMouseX(event);
|
|
this.startMouseY = getMouseY(event);
|
|
|
|
this._startCameraOffset = this.camera.getOffset();
|
|
};
|
|
|
|
|
|
/**
|
|
* Start a moving operation inside the provided parent element
|
|
* @param {Event} event The event that occurred (required for
|
|
* retrieving the mouse position)
|
|
*/
|
|
Graph3d.prototype._onMouseDown = function(event) {
|
|
event = event || window.event;
|
|
|
|
// check if mouse is still down (may be up when focus is lost for example
|
|
// in an iframe)
|
|
if (this.leftButtonDown) {
|
|
this._onMouseUp(event);
|
|
}
|
|
|
|
// only react on left mouse button down
|
|
this.leftButtonDown = event.which ? (event.which === 1) : (event.button === 1);
|
|
if (!this.leftButtonDown && !this.touchDown) return;
|
|
|
|
this._storeMousePosition(event);
|
|
|
|
this.startStart = new Date(this.start);
|
|
this.startEnd = new Date(this.end);
|
|
this.startArmRotation = this.camera.getArmRotation();
|
|
|
|
this.frame.style.cursor = 'move';
|
|
|
|
// add event listeners to handle moving the contents
|
|
// we store the function onmousemove and onmouseup in the graph, so we can
|
|
// remove the eventlisteners lateron in the function mouseUp()
|
|
var me = this;
|
|
this.onmousemove = function (event) {me._onMouseMove(event);};
|
|
this.onmouseup = function (event) {me._onMouseUp(event);};
|
|
util.addEventListener(document, 'mousemove', me.onmousemove);
|
|
util.addEventListener(document, 'mouseup', me.onmouseup);
|
|
util.preventDefault(event);
|
|
};
|
|
|
|
|
|
/**
|
|
* Perform moving operating.
|
|
* This function activated from within the funcion Graph.mouseDown().
|
|
* @param {Event} event Well, eehh, the event
|
|
*/
|
|
Graph3d.prototype._onMouseMove = function (event) {
|
|
this.moving = true;
|
|
event = event || window.event;
|
|
|
|
// calculate change in mouse position
|
|
var diffX = parseFloat(getMouseX(event)) - this.startMouseX;
|
|
var diffY = parseFloat(getMouseY(event)) - this.startMouseY;
|
|
|
|
// move with ctrl or rotate by other
|
|
if (event && event.ctrlKey === true) {
|
|
// calculate change in mouse position
|
|
var scaleX = this.frame.clientWidth * 0.5;
|
|
var scaleY = this.frame.clientHeight * 0.5;
|
|
|
|
var offXNew = (this._startCameraOffset.x || 0) - ((diffX / scaleX) * this.camera.armLength) * 0.8;
|
|
var offYNew = (this._startCameraOffset.y || 0) + ((diffY / scaleY) * this.camera.armLength) * 0.8;
|
|
|
|
this.camera.setOffset(offXNew, offYNew);
|
|
this._storeMousePosition(event);
|
|
} else {
|
|
var horizontalNew = this.startArmRotation.horizontal + diffX / 200;
|
|
var verticalNew = this.startArmRotation.vertical + diffY / 200;
|
|
|
|
var snapAngle = 4; // degrees
|
|
var snapValue = Math.sin(snapAngle / 360 * 2 * Math.PI);
|
|
|
|
// snap horizontally to nice angles at 0pi, 0.5pi, 1pi, 1.5pi, etc...
|
|
// the -0.001 is to take care that the vertical axis is always drawn at the left front corner
|
|
if (Math.abs(Math.sin(horizontalNew)) < snapValue) {
|
|
horizontalNew = Math.round(horizontalNew / Math.PI) * Math.PI - 0.001;
|
|
}
|
|
if (Math.abs(Math.cos(horizontalNew)) < snapValue) {
|
|
horizontalNew = (Math.round(horizontalNew / Math.PI - 0.5) + 0.5) * Math.PI - 0.001;
|
|
}
|
|
|
|
// snap vertically to nice angles
|
|
if (Math.abs(Math.sin(verticalNew)) < snapValue) {
|
|
verticalNew = Math.round(verticalNew / Math.PI) * Math.PI;
|
|
}
|
|
if (Math.abs(Math.cos(verticalNew)) < snapValue) {
|
|
verticalNew = (Math.round(verticalNew / Math.PI - 0.5) + 0.5) * Math.PI;
|
|
}
|
|
this.camera.setArmRotation(horizontalNew, verticalNew);
|
|
}
|
|
|
|
this.redraw();
|
|
|
|
// fire a cameraPositionChange event
|
|
var parameters = this.getCameraPosition();
|
|
this.emit('cameraPositionChange', parameters);
|
|
|
|
util.preventDefault(event);
|
|
};
|
|
|
|
|
|
/**
|
|
* Stop moving operating.
|
|
* This function activated from within the funcion Graph.mouseDown().
|
|
* @param {event} event The event
|
|
*/
|
|
Graph3d.prototype._onMouseUp = function (event) {
|
|
this.frame.style.cursor = 'auto';
|
|
this.leftButtonDown = false;
|
|
|
|
// remove event listeners here
|
|
util.removeEventListener(document, 'mousemove', this.onmousemove);
|
|
util.removeEventListener(document, 'mouseup', this.onmouseup);
|
|
util.preventDefault(event);
|
|
};
|
|
|
|
/**
|
|
* @param {event} event The event
|
|
*/
|
|
Graph3d.prototype._onClick = function (event) {
|
|
if (!this.onclick_callback)
|
|
return;
|
|
if (!this.moving) {
|
|
var boundingRect = this.frame.getBoundingClientRect();
|
|
var mouseX = getMouseX(event) - boundingRect.left;
|
|
var mouseY = getMouseY(event) - boundingRect.top;
|
|
var dataPoint = this._dataPointFromXY(mouseX, mouseY);
|
|
if (dataPoint)
|
|
this.onclick_callback(dataPoint.point.data);
|
|
}
|
|
else { // disable onclick callback, if it came immediately after rotate/pan
|
|
this.moving = false;
|
|
}
|
|
util.preventDefault(event);
|
|
};
|
|
|
|
/**
|
|
* After having moved the mouse, a tooltip should pop up when the mouse is resting on a data point
|
|
* @param {Event} event A mouse move event
|
|
*/
|
|
Graph3d.prototype._onTooltip = function (event) {
|
|
var delay = 300; // ms
|
|
var boundingRect = this.frame.getBoundingClientRect();
|
|
var mouseX = getMouseX(event) - boundingRect.left;
|
|
var mouseY = getMouseY(event) - boundingRect.top;
|
|
|
|
if (!this.showTooltip) {
|
|
return;
|
|
}
|
|
|
|
if (this.tooltipTimeout) {
|
|
clearTimeout(this.tooltipTimeout);
|
|
}
|
|
|
|
// (delayed) display of a tooltip only if no mouse button is down
|
|
if (this.leftButtonDown) {
|
|
this._hideTooltip();
|
|
return;
|
|
}
|
|
|
|
if (this.tooltip && this.tooltip.dataPoint) {
|
|
// tooltip is currently visible
|
|
var dataPoint = this._dataPointFromXY(mouseX, mouseY);
|
|
if (dataPoint !== this.tooltip.dataPoint) {
|
|
// datapoint changed
|
|
if (dataPoint) {
|
|
this._showTooltip(dataPoint);
|
|
}
|
|
else {
|
|
this._hideTooltip();
|
|
}
|
|
}
|
|
}
|
|
else {
|
|
// tooltip is currently not visible
|
|
var me = this;
|
|
this.tooltipTimeout = setTimeout(function () {
|
|
me.tooltipTimeout = null;
|
|
|
|
// show a tooltip if we have a data point
|
|
var dataPoint = me._dataPointFromXY(mouseX, mouseY);
|
|
if (dataPoint) {
|
|
me._showTooltip(dataPoint);
|
|
}
|
|
}, delay);
|
|
}
|
|
};
|
|
|
|
/**
|
|
* Event handler for touchstart event on mobile devices
|
|
*/
|
|
Graph3d.prototype._onTouchStart = function(event) {
|
|
this.touchDown = true;
|
|
|
|
var me = this;
|
|
this.ontouchmove = function (event) {me._onTouchMove(event);};
|
|
this.ontouchend = function (event) {me._onTouchEnd(event);};
|
|
util.addEventListener(document, 'touchmove', me.ontouchmove);
|
|
util.addEventListener(document, 'touchend', me.ontouchend);
|
|
|
|
this._onMouseDown(event);
|
|
};
|
|
|
|
/**
|
|
* Event handler for touchmove event on mobile devices
|
|
*/
|
|
Graph3d.prototype._onTouchMove = function(event) {
|
|
this._onMouseMove(event);
|
|
};
|
|
|
|
/**
|
|
* Event handler for touchend event on mobile devices
|
|
*/
|
|
Graph3d.prototype._onTouchEnd = function(event) {
|
|
this.touchDown = false;
|
|
|
|
util.removeEventListener(document, 'touchmove', this.ontouchmove);
|
|
util.removeEventListener(document, 'touchend', this.ontouchend);
|
|
|
|
this._onMouseUp(event);
|
|
};
|
|
|
|
|
|
/**
|
|
* Event handler for mouse wheel event, used to zoom the graph
|
|
* Code from http://adomas.org/javascript-mouse-wheel/
|
|
* @param {event} event The event
|
|
*/
|
|
Graph3d.prototype._onWheel = function(event) {
|
|
if (!event) /* For IE. */
|
|
event = window.event;
|
|
|
|
// retrieve delta
|
|
var delta = 0;
|
|
if (event.wheelDelta) { /* IE/Opera. */
|
|
delta = event.wheelDelta/120;
|
|
} else if (event.detail) { /* Mozilla case. */
|
|
// In Mozilla, sign of delta is different than in IE.
|
|
// Also, delta is multiple of 3.
|
|
delta = -event.detail/3;
|
|
}
|
|
|
|
// If delta is nonzero, handle it.
|
|
// Basically, delta is now positive if wheel was scrolled up,
|
|
// and negative, if wheel was scrolled down.
|
|
if (delta) {
|
|
var oldLength = this.camera.getArmLength();
|
|
var newLength = oldLength * (1 - delta / 10);
|
|
|
|
this.camera.setArmLength(newLength);
|
|
this.redraw();
|
|
|
|
this._hideTooltip();
|
|
}
|
|
|
|
// fire a cameraPositionChange event
|
|
var parameters = this.getCameraPosition();
|
|
this.emit('cameraPositionChange', parameters);
|
|
|
|
// Prevent default actions caused by mouse wheel.
|
|
// That might be ugly, but we handle scrolls somehow
|
|
// anyway, so don't bother here..
|
|
util.preventDefault(event);
|
|
};
|
|
|
|
/**
|
|
* Test whether a point lies inside given 2D triangle
|
|
*
|
|
* @param {Point2d} point
|
|
* @param {Point2d[]} triangle
|
|
* @returns {boolean} true if given point lies inside or on the edge of the
|
|
* triangle, false otherwise
|
|
* @private
|
|
*/
|
|
Graph3d.prototype._insideTriangle = function (point, triangle) {
|
|
var a = triangle[0],
|
|
b = triangle[1],
|
|
c = triangle[2];
|
|
|
|
function sign (x) {
|
|
return x > 0 ? 1 : x < 0 ? -1 : 0;
|
|
}
|
|
|
|
var as = sign((b.x - a.x) * (point.y - a.y) - (b.y - a.y) * (point.x - a.x));
|
|
var bs = sign((c.x - b.x) * (point.y - b.y) - (c.y - b.y) * (point.x - b.x));
|
|
var cs = sign((a.x - c.x) * (point.y - c.y) - (a.y - c.y) * (point.x - c.x));
|
|
|
|
// each of the three signs must be either equal to each other or zero
|
|
return (as == 0 || bs == 0 || as == bs) &&
|
|
(bs == 0 || cs == 0 || bs == cs) &&
|
|
(as == 0 || cs == 0 || as == cs);
|
|
};
|
|
|
|
/**
|
|
* Find a data point close to given screen position (x, y)
|
|
*
|
|
* @param {Number} x
|
|
* @param {Number} y
|
|
* @returns {Object | null} The closest data point or null if not close to any
|
|
* data point
|
|
* @private
|
|
*/
|
|
Graph3d.prototype._dataPointFromXY = function (x, y) {
|
|
var i,
|
|
distMax = 100, // px
|
|
dataPoint = null,
|
|
closestDataPoint = null,
|
|
closestDist = null,
|
|
center = new Point2d(x, y);
|
|
|
|
if (this.style === Graph3d.STYLE.BAR ||
|
|
this.style === Graph3d.STYLE.BARCOLOR ||
|
|
this.style === Graph3d.STYLE.BARSIZE) {
|
|
// the data points are ordered from far away to closest
|
|
for (i = this.dataPoints.length - 1; i >= 0; i--) {
|
|
dataPoint = this.dataPoints[i];
|
|
var surfaces = dataPoint.surfaces;
|
|
if (surfaces) {
|
|
for (var s = surfaces.length - 1; s >= 0; s--) {
|
|
// split each surface in two triangles, and see if the center point is inside one of these
|
|
var surface = surfaces[s];
|
|
var corners = surface.corners;
|
|
var triangle1 = [corners[0].screen, corners[1].screen, corners[2].screen];
|
|
var triangle2 = [corners[2].screen, corners[3].screen, corners[0].screen];
|
|
if (this._insideTriangle(center, triangle1) ||
|
|
this._insideTriangle(center, triangle2)) {
|
|
// return immediately at the first hit
|
|
return dataPoint;
|
|
}
|
|
}
|
|
}
|
|
}
|
|
}
|
|
else {
|
|
// find the closest data point, using distance to the center of the point on 2d screen
|
|
for (i = 0; i < this.dataPoints.length; i++) {
|
|
dataPoint = this.dataPoints[i];
|
|
var point = dataPoint.screen;
|
|
if (point) {
|
|
var distX = Math.abs(x - point.x);
|
|
var distY = Math.abs(y - point.y);
|
|
var dist = Math.sqrt(distX * distX + distY * distY);
|
|
|
|
if ((closestDist === null || dist < closestDist) && dist < distMax) {
|
|
closestDist = dist;
|
|
closestDataPoint = dataPoint;
|
|
}
|
|
}
|
|
}
|
|
}
|
|
|
|
|
|
return closestDataPoint;
|
|
};
|
|
|
|
|
|
/**
|
|
* Determine if the given style has bars
|
|
*
|
|
* @param {number} style the style to check
|
|
* @returns {boolean} true if bar style, false otherwise
|
|
*/
|
|
Graph3d.prototype.hasBars = function(style) {
|
|
return style == Graph3d.STYLE.BAR ||
|
|
style == Graph3d.STYLE.BARCOLOR ||
|
|
style == Graph3d.STYLE.BARSIZE;
|
|
};
|
|
|
|
|
|
/**
|
|
* Display a tooltip for given data point
|
|
* @param {Object} dataPoint
|
|
* @private
|
|
*/
|
|
Graph3d.prototype._showTooltip = function (dataPoint) {
|
|
var content, line, dot;
|
|
|
|
if (!this.tooltip) {
|
|
content = document.createElement('div');
|
|
Object.assign(content.style, {}, this.tooltipStyle.content);
|
|
content.style.position = 'absolute';
|
|
|
|
line = document.createElement('div');
|
|
Object.assign(line.style, {}, this.tooltipStyle.line);
|
|
line.style.position = 'absolute';
|
|
|
|
dot = document.createElement('div');
|
|
Object.assign(dot.style, {}, this.tooltipStyle.dot);
|
|
dot.style.position = 'absolute';
|
|
|
|
this.tooltip = {
|
|
dataPoint: null,
|
|
dom: {
|
|
content: content,
|
|
line: line,
|
|
dot: dot
|
|
}
|
|
};
|
|
}
|
|
else {
|
|
content = this.tooltip.dom.content;
|
|
line = this.tooltip.dom.line;
|
|
dot = this.tooltip.dom.dot;
|
|
}
|
|
|
|
this._hideTooltip();
|
|
|
|
this.tooltip.dataPoint = dataPoint;
|
|
if (typeof this.showTooltip === 'function') {
|
|
content.innerHTML = this.showTooltip(dataPoint.point);
|
|
}
|
|
else {
|
|
content.innerHTML = '<table>' +
|
|
'<tr><td>' + this.xLabel + ':</td><td>' + dataPoint.point.x + '</td></tr>' +
|
|
'<tr><td>' + this.yLabel + ':</td><td>' + dataPoint.point.y + '</td></tr>' +
|
|
'<tr><td>' + this.zLabel + ':</td><td>' + dataPoint.point.z + '</td></tr>' +
|
|
'</table>';
|
|
}
|
|
|
|
content.style.left = '0';
|
|
content.style.top = '0';
|
|
this.frame.appendChild(content);
|
|
this.frame.appendChild(line);
|
|
this.frame.appendChild(dot);
|
|
|
|
// calculate sizes
|
|
var contentWidth = content.offsetWidth;
|
|
var contentHeight = content.offsetHeight;
|
|
var lineHeight = line.offsetHeight;
|
|
var dotWidth = dot.offsetWidth;
|
|
var dotHeight = dot.offsetHeight;
|
|
|
|
var left = dataPoint.screen.x - contentWidth / 2;
|
|
left = Math.min(Math.max(left, 10), this.frame.clientWidth - 10 - contentWidth);
|
|
|
|
line.style.left = dataPoint.screen.x + 'px';
|
|
line.style.top = (dataPoint.screen.y - lineHeight) + 'px';
|
|
content.style.left = left + 'px';
|
|
content.style.top = (dataPoint.screen.y - lineHeight - contentHeight) + 'px';
|
|
dot.style.left = (dataPoint.screen.x - dotWidth / 2) + 'px';
|
|
dot.style.top = (dataPoint.screen.y - dotHeight / 2) + 'px';
|
|
};
|
|
|
|
/**
|
|
* Hide the tooltip when displayed
|
|
* @private
|
|
*/
|
|
Graph3d.prototype._hideTooltip = function () {
|
|
if (this.tooltip) {
|
|
this.tooltip.dataPoint = null;
|
|
|
|
for (var prop in this.tooltip.dom) {
|
|
if (this.tooltip.dom.hasOwnProperty(prop)) {
|
|
var elem = this.tooltip.dom[prop];
|
|
if (elem && elem.parentNode) {
|
|
elem.parentNode.removeChild(elem);
|
|
}
|
|
}
|
|
}
|
|
}
|
|
};
|
|
|
|
/**--------------------------------------------------------------------------**/
|
|
|
|
|
|
/**
|
|
* Get the horizontal mouse position from a mouse event
|
|
*
|
|
* @param {Event} event
|
|
* @returns {Number} mouse x
|
|
*/
|
|
function getMouseX (event) {
|
|
if ('clientX' in event) return event.clientX;
|
|
return event.targetTouches[0] && event.targetTouches[0].clientX || 0;
|
|
}
|
|
|
|
/**
|
|
* Get the vertical mouse position from a mouse event
|
|
*
|
|
* @param {Event} event
|
|
* @returns {Number} mouse y
|
|
*/
|
|
function getMouseY (event) {
|
|
if ('clientY' in event) return event.clientY;
|
|
return event.targetTouches[0] && event.targetTouches[0].clientY || 0;
|
|
}
|
|
|
|
|
|
// -----------------------------------------------------------------------------
|
|
// Public methods for specific settings
|
|
// -----------------------------------------------------------------------------
|
|
|
|
/**
|
|
* Set the rotation and distance of the camera
|
|
*
|
|
* @param {Object} pos An object with the camera position
|
|
* @param {?Number} pos.horizontal The horizontal rotation, between 0 and 2*PI.
|
|
* Optional, can be left undefined.
|
|
* @param {?Number} pos.vertical The vertical rotation, between 0 and 0.5*PI.
|
|
* if vertical=0.5*PI, the graph is shown from
|
|
* the top. Optional, can be left undefined.
|
|
* @param {?Number} pos.distance The (normalized) distance of the camera to the
|
|
* center of the graph, a value between 0.71 and
|
|
* 5.0. Optional, can be left undefined.
|
|
*/
|
|
Graph3d.prototype.setCameraPosition = function(pos) {
|
|
Settings.setCameraPosition(pos, this);
|
|
this.redraw();
|
|
};
|
|
|
|
|
|
/**
|
|
* Set a new size for the graph
|
|
*
|
|
* @param {string} width Width in pixels or percentage (for example '800px'
|
|
* or '50%')
|
|
* @param {string} height Height in pixels or percentage (for example '400px'
|
|
* or '30%')
|
|
*/
|
|
Graph3d.prototype.setSize = function(width, height) {
|
|
this._setSize(width, height);
|
|
this.redraw();
|
|
};
|
|
|
|
// -----------------------------------------------------------------------------
|
|
// End public methods for specific settings
|
|
// -----------------------------------------------------------------------------
|
|
|
|
|
|
module.exports = Graph3d;
|