654 lines
24 KiB
JavaScript
654 lines
24 KiB
JavaScript
//>>built
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require({cache:{
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'url:dojox/calc/templates/Grapher.html':"<div>\n<div data-dojo-attach-point=\"chartsParent\" class=\"dojoxCalcChartHolder\"></div>\n<div data-dojo-attach-point=\"outerDiv\">\n<div data-dojo-type=\"dijit.form.DropDownButton\" data-dojo-attach-point=\"windowOptions\" class=\"dojoxCalcDropDownForWindowOptions\" title=\"Window Options\">\n\t<div>Window Options</div>\n\t<div data-dojo-type=\"dijit.TooltipDialog\" data-dojo-attach-point=\"windowOptionsInside\" class=\"dojoxCalcTooltipDialogForWindowOptions\" title=\"\">\n\t\t<table class=\"dojoxCalcGraphOptionTable\">\n\t\t\t<tr>\n\t\t\t\t<td>\n\t\t\t\t\tWidth:\n\t\t\t\t</td>\n\t\t\t\t<td>\n\t\t\t\t\t<input data-dojo-type=\"dijit.form.TextBox\" data-dojo-attach-point=\"graphWidth\" class=\"dojoxCalcGraphWidth\" value=\"500\" />\n\t\t\t\t</td>\n\t\t\t\t<td>\n\t\t\t\t\tHeight:\n\t\t\t\t</td>\n\t\t\t\t<td>\n\t\t\t\t\t<input data-dojo-type=\"dijit.form.TextBox\" data-dojo-attach-point=\"graphHeight\" class=\"dojoxCalcGraphHeight\" value=\"500\" />\n\t\t\t\t</td>\n\t\t\t</tr>\n\t\t\t<tr>\n\t\t\t\t<td>\n\t\t\t\t\tX >=\n\t\t\t\t</td>\n\t\t\t\t<td>\n\t\t\t\t\t<input data-dojo-type=\"dijit.form.TextBox\" data-dojo-attach-point=\"graphMinX\" class=\"dojoxCalcGraphMinX\" value=\"-10\" />\n\t\t\t\t</td>\n\n\t\t\t\t<td>\n\t\t\t\t\tX <=\n\t\t\t\t</td>\n\t\t\t\t<td>\n\t\t\t\t\t<input data-dojo-type=\"dijit.form.TextBox\" data-dojo-attach-point=\"graphMaxX\" class=\"dojoxCalcGraphMaxX\" value=\"10\" />\n\t\t\t\t</td>\n\t\t\t</tr>\n\t\t\t<tr>\n\t\t\t\t<td>\n\t\t\t\t\tY >=\n\t\t\t\t</td>\n\t\t\t\t<td>\n\t\t\t\t\t<input data-dojo-type=\"dijit.form.TextBox\" data-dojo-attach-point=\"graphMinY\" class=\"dojoxCalcGraphMinY\" value=\"-10\" />\n\t\t\t\t</td>\n\n\t\t\t\t<td>\n\t\t\t\t\tY <=\n\t\t\t\t</td>\n\t\t\t\t<td>\n\t\t\t\t\t<input data-dojo-type=\"dijit.form.TextBox\" data-dojo-attach-point=\"graphMaxY\" class=\"dojoxCalcGraphMaxY\" value=\"10\" />\n\t\t\t\t</td>\n\t\t\t</tr>\n\t\t</table>\n\t</div>\n</div>\n\n<BR>\n\n<div class=\"dojoxCalcGrapherFuncOuterDiv\">\n\t<table class=\"dojoxCalcGrapherFuncTable\" data-dojo-attach-point=\"graphTable\">\n\t</table>\n</div>\n\n<div data-dojo-type=\"dijit.form.DropDownButton\" data-dojo-attach-point='addFuncButton' class=\"dojoxCalcDropDownAddingFunction\">\n\t<div>Add Function</div>\n\t<div data-dojo-type=\"dijit.TooltipDialog\" data-dojo-attach-point=\"addFuncInside\" class=\"dojoxCalcTooltipDialogAddingFunction\" title=\"\">\n\t\t<table class=\"dojoxCalcGrapherModeTable\">\n\t\t\t<tr>\n\t\t\t\t<td>\n\t\t\t\t\tMode:\n\t\t\t\t</td>\n\t\t\t\t<td>\n\t\t\t\t\t<select data-dojo-type=\"dijit.form.Select\" data-dojo-attach-point=\"funcMode\" class=\"dojoxCalcFunctionModeSelector\">\n\t\t\t\t\t\t<option value=\"y=\" selected=\"selected\">y=</option>\n\t\t\t\t\t\t<option value=\"x=\">x=</option>\n\t\t\t\t\t</select>\n\t\t\t\t</td>\n\t\t\t\t<td>\n\t\t\t</tr>\n\t\n\t\t\t<tr>\n\t\t\t\t<td>\n\t\t\t\t\t<input data-dojo-type=\"dijit.form.Button\" data-dojo-attach-point=\"createFunc\" class=\"dojoxCalcAddFunctionButton\" label=\"Create\" />\n\t\t\t\t</td>\n\t\t\t</tr>\n\t\t</table>\n\t</div>\n</div>\n<BR>\n<BR>\n<table class=\"dijitInline dojoxCalcGrapherLayout\">\n\t<tr>\n\t\t<td class=\"dojoxCalcGrapherButtonContainer\">\n\t\t\t<input data-dojo-type=\"dijit.form.Button\" class=\"dojoxCalcGrapherButton\" data-dojo-attach-point='selectAllButton' label=\"Select All\" />\n\t\t</td>\n\t\t<td class=\"dojoxCalcGrapherButtonContainer\">\n\t\t\t<input data-dojo-type=\"dijit.form.Button\" class=\"dojoxCalcGrapherButton\" data-dojo-attach-point='deselectAllButton' label=\"Deselect All\" />\n\t\t</td>\n\t</tr>\n\t<tr>\n\t\t<td class=\"dojoxCalcGrapherButtonContainer\">\n\t\t\t<input data-dojo-type=\"dijit.form.Button\" class=\"dojoxCalcGrapherButton\" data-dojo-attach-point='drawButton'label=\"Draw Selected\" />\n\t\t</td>\n\t\t<td class=\"dojoxCalcGrapherButtonContainer\">\n\t\t\t<input data-dojo-type=\"dijit.form.Button\" class=\"dojoxCalcGrapherButton\" data-dojo-attach-point='eraseButton' label=\"Erase Selected\" />\n\t\t</td>\n\t</tr>\n\t<tr>\n\t\t<td class=\"dojoxCalcGrapherButtonContainer\">\n\t\t\t<input data-dojo-type=\"dijit.form.Button\" class=\"dojoxCalcGrapherButton\" data-dojo-attach-point='deleteButton' label=\"Delete Selected\" />\n\t\t</td>\n\t\t<td class=\"dojoxCalcGrapherButtonContainer\">\n\t\t\t<input data-dojo-type=\"dijit.form.Button\" class=\"dojoxCalcGrapherButton\" data-dojo-attach-point='closeButton' label=\"Close\" />\n\t\t</td>\n\t</tr>\n</table>\n</div>\n</div>\n"}});
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define("dojox/calc/Grapher", [
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"dojo/_base/declare",
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"dojo/_base/lang",
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"dojo/_base/window",
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"dojo/dom-construct",
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"dojo/dom-class",
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"dojo/dom-style",
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"dijit/_WidgetBase",
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"dijit/_WidgetsInTemplateMixin",
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"dijit/_TemplatedMixin",
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"dojox/math/_base",
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"dijit/registry",
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"dijit/form/DropDownButton",
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"dijit/TooltipDialog",
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"dijit/form/TextBox",
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"dijit/form/CheckBox",
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"dijit/ColorPalette",
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"dojox/charting/Chart",
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"dojox/charting/axis2d/Default",
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"dojox/charting/plot2d/Default",
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"dojox/charting/plot2d/Lines",
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"dojox/charting/themes/Tufte",
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"dojo/colors",
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"dojo/text!./templates/Grapher.html",
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"dojox/calc/_Executor",
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"dijit/form/Button", // template
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"dijit/form/Select" // template
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], function(declare, lang, win, domConstruct, domClass, domStyle, WidgetBase, WidgetsInTemplateMixin, TemplatedMixin, math, registry, DropDownButton, TooltipDialog, TextBox, CheckBox, ColorPalette, Chart, axis2d, plot2d, Lines, Tufte, colors, template, calc){
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// summary
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// provide static functions for Grapher
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var
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epsilon = 1e-15 / 9,
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bigNumber = 1e200,
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log2 = Math.log(2),
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defaultParams = {graphNumber:0, fOfX:true, color:{stroke:"black"}};
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/*=====
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WidgetBase = dijit._WidgetBase;
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WidgetsInTemplateMixin = dijit._WidgetsInTemplateMixin;
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TemplatedMixin = dijit._TemplatedMixin;
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=====*/
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var Grapher = declare(
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"dojox.calc.Grapher",
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[WidgetBase, TemplatedMixin, WidgetsInTemplateMixin],
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{
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// summary:
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// The dialog layout for making graphs
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//
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templateString: template,
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addXYAxes: function(chart){
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// summary:
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// add or re-add the default x/y axes to the Chart provided
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// params:
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// chart is an instance of dojox.charting.Chart
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return chart.addAxis("x", {
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max: parseInt(this.graphMaxX.get("value")),
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min: parseInt(this.graphMinX.get("value")),
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majorLabels: true,
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minorLabels: true,
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//includeZero: true,
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minorTicks: false,
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microTicks: false,
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//majorTickStep: 1,
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htmlLabels: true,
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labelFunc: function(value){
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return value;
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},
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maxLabelSize: 30,
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fixUpper: "major", fixLower: "major",
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majorTick: { length: 3 }
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}).
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addAxis("y", {
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max: parseInt(this.graphMaxY.get("value")),
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min: parseInt(this.graphMinY.get("value")),
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labelFunc: function(value){
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return value;
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},
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maxLabelSize: 50,
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vertical: true,
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// htmlLabels: false,
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microTicks: false,
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minorTicks: true,
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majorTick: { stroke: "black", length: 3 }
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});
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},
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selectAll: function(){
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// summary
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// select all checkboxes inside the function table
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for(var i = 0; i < this.rowCount; i++){
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this.array[i][this.checkboxIndex].set("checked", true);
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}
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},
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deselectAll: function(){
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// summary
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// deselect all checkboxes inside the function table
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for(var i = 0; i < this.rowCount; i++){
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this.array[i][this.checkboxIndex].set("checked", false);
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}
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},
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drawOne: function(i){
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// i is a the index to this.array
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// override me
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},
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onDraw: function(){
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console.log("Draw was pressed");
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// override me
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},
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erase: function(i){
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// summary:
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// erase the chart inside this.array with the index i
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// params:
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// i is the integer index to this.array that represents the current row number in the table
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var nameNum = 0;
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var name = "Series "+this.array[i][this.funcNumberIndex]+"_"+nameNum;
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while(name in this.array[i][this.chartIndex].runs){
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this.array[i][this.chartIndex].removeSeries(name);
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nameNum++;
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name = "Series "+this.array[i][this.funcNumberIndex]+"_"+nameNum;
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}
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this.array[i][this.chartIndex].render();
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this.setStatus(i, "Hidden");
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},
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onErase: function(){
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// summary:
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// the erase button's onClick method
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// it see's if the checkbox is checked and then erases it if it is.
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for(var i = 0; i < this.rowCount; i++){
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if(this.array[i][this.checkboxIndex].get("checked")){
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this.erase(i);
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}
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}
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},
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onDelete: function(){
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// summary:
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// the delete button's onClick method
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// delete all of the selected rows
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for(var i = 0; i < this.rowCount; i++){
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if(this.array[i][this.checkboxIndex].get("checked")){
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this.erase(i);
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for(var k = 0; k < this.functionRef; k++){
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if(this.array[i][k] && this.array[i][k]["destroy"]){
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this.array[i][k].destroy();
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}
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}
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this.graphTable.deleteRow(i);
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this.array.splice(i, 1);
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this.rowCount--;
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i--;
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}
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}
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},
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// attributes to name the indices of this.array
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checkboxIndex: 0,
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functionMode: 1,
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expressionIndex: 2,
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colorIndex: 3,
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dropDownIndex: 4,
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tooltipIndex: 5,
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colorBoxFieldsetIndex: 6,
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statusIndex: 7,
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chartIndex: 8,
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funcNumberIndex: 9,
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evaluatedExpression: 10,
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functionRef: 11,
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createFunction: function(){
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// summary:
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// create a new row in the table with all of the dojo objects.
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var tr = this.graphTable.insertRow(-1);
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this.array[tr.rowIndex] = [];
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var td = tr.insertCell(-1);
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var d = domConstruct.create('div');
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td.appendChild(d);
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var checkBox = new CheckBox({}, d);
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this.array[tr.rowIndex][this.checkboxIndex] = checkBox;
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domClass.add(d, "dojoxCalcCheckBox");
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td = tr.insertCell(-1);
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var funcMode = this.funcMode.get("value");
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d = win.doc.createTextNode(funcMode);
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td.appendChild(d);
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this.array[tr.rowIndex][this.functionMode] = funcMode;
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//domClass.add(d, "dojoxCalcFunctionMode");// cannot use text nodes
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td = tr.insertCell(-1);
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d = domConstruct.create('div');
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td.appendChild(d);
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var expression = new TextBox({}, d);
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this.array[tr.rowIndex][this.expressionIndex] = expression;
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domClass.add(d, "dojoxCalcExpressionBox");
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var b = domConstruct.create('div');
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var color = new ColorPalette({changedColor:this.changedColor}, b);
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domClass.add(b, "dojoxCalcColorPalette");
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this.array[tr.rowIndex][this.colorIndex] = color;
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var c = domConstruct.create('div');
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var dialog = new TooltipDialog({content:color}, c);
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this.array[tr.rowIndex][this.tooltipIndex] = dialog;
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domClass.add(c, "dojoxCalcContainerOfColor");
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td = tr.insertCell(-1);
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d = domConstruct.create('div');
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td.appendChild(d);
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var colorBoxFieldset = domConstruct.create('fieldset');
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domStyle.set(colorBoxFieldset, { backgroundColor: "black", width: "1em", height: "1em", display: "inline" });
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this.array[tr.rowIndex][this.colorBoxFieldsetIndex] = colorBoxFieldset;
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var drop = new DropDownButton({label:"Color ", dropDown:dialog}, d);
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drop.containerNode.appendChild(colorBoxFieldset);
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this.array[tr.rowIndex][this.dropDownIndex] = drop;
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domClass.add(d, "dojoxCalcDropDownForColor");
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/*td = tr.insertCell(-1);
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d = domConstruct.create('div');
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td.appendChild(d);
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var status = new TextBox({style:"width:50px", value:"Hidden", readOnly:true}, d);//hidden, drawn, or error
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this.array[tr.rowIndex][this.statusIndex] = status;
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domClass.add(d, "dojoxCalcStatusBox");*/
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td = tr.insertCell(-1);
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d = domConstruct.create('fieldset');
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d.innerHTML = "Hidden";
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this.array[tr.rowIndex][this.statusIndex] = d;
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domClass.add(d, "dojoxCalcStatusBox");
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td.appendChild(d);
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d = domConstruct.create('div');
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domStyle.set(d, { position: "absolute", left: "0px", top: "0px" })
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this.chartsParent.appendChild(d);
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this.array[tr.rowIndex][this.chartNodeIndex] = d;
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domClass.add(d, "dojoxCalcChart");
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var chart = new dojox.charting.Chart(d).setTheme(dojox.charting.themes.Tufte).
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addPlot("default", { type: "Lines", shadow: {dx: 1, dy: 1, width: 2, color: [0, 0, 0, 0.3]} });
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this.addXYAxes(chart);
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this.array[tr.rowIndex][this.chartIndex] = chart;
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color.set("chart", chart);
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color.set("colorBox", colorBoxFieldset);
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color.set("onChange", lang.hitch(color, 'changedColor'));
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this.array[tr.rowIndex][this.funcNumberIndex] = this.funcNumber++;
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this.rowCount++;
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},
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setStatus: function(i, status){
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// summary:
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// set the status of the row i to be status
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// params:
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// i is an integer index of this.array as well as a row index
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// status is a String, it is either Error, Hidden, or Drawn
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this.array[i][this.statusIndex].innerHTML = status; //this.array[i][this.statusIndex].set("value", status);
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},
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changedColor: function(){
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// summary:
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// make the color of the chart the new color
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// the context is changed to the colorPalette, and a reference to chart was added to it a an attribute
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var chart = this.get("chart");
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var colorBoxFieldset = this.get("colorBox");
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for(var i = 0; i < chart.series.length; i++){
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if(chart.series[i]["stroke"]){
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if(chart.series[i].stroke["color"]){
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chart.series[i]["stroke"].color = this.get("value");
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chart.dirty = true;
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}
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}
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}
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chart.render();
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domStyle.set(colorBoxFieldset, { backgroundColor: this.get("value") });
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},
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makeDirty: function(){
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// summary:
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// if something in the window options is changed, this is called
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this.dirty = true;
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},
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checkDirty1: function(){
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// summary:
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// to stay in sync with onChange, checkDirty is called with a timeout
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setTimeout(lang.hitch(this, 'checkDirty'), 0);
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},
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checkDirty: function(){
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// summary:
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// adjust all charts in this.array according to any changes in window options
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if(this.dirty){
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// change the axes of all charts if it is dirty
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for(var i = 0; i < this.rowCount; i++){
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this.array[i][this.chartIndex].removeAxis("x");
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this.array[i][this.chartIndex].removeAxis("y");
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this.addXYAxes(this.array[i][this.chartIndex]);
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}
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this.onDraw();
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}
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this.dirty = false;
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},
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postCreate: function(){
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// summary
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// add Event handlers, some additional attributes, etc
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this.inherited(arguments);// this is super class postCreate
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this.createFunc.set("onClick", lang.hitch(this, 'createFunction'));
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this.selectAllButton.set("onClick", lang.hitch(this, 'selectAll'));
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this.deselectAllButton.set("onClick", lang.hitch(this, 'deselectAll'));
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this.drawButton.set("onClick", lang.hitch(this, 'onDraw'));
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this.eraseButton.set("onClick", lang.hitch(this, 'onErase'));
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this.deleteButton.set("onClick", lang.hitch(this, 'onDelete'));
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this.dirty = false;
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this.graphWidth.set("onChange", lang.hitch(this, 'makeDirty'));
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this.graphHeight.set("onChange", lang.hitch(this, 'makeDirty'));
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this.graphMaxX.set("onChange", lang.hitch(this, 'makeDirty'));
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this.graphMinX.set("onChange", lang.hitch(this, 'makeDirty'));
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this.graphMaxY.set("onChange", lang.hitch(this, 'makeDirty'));
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this.graphMinY.set("onChange", lang.hitch(this, 'makeDirty'));
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this.windowOptionsInside.set("onClose", lang.hitch(this, 'checkDirty1'));
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this.funcNumber = 0;
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this.rowCount = 0;
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this.array = [];
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},
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startup: function(){
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// summary
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// make sure the parent has a close button if it needs to be able to close
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this.inherited(arguments);// this is super class startup
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// close is only valid if the parent is a widget with a close function
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var parent = registry.getEnclosingWidget(this.domNode.parentNode);
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if(parent && typeof parent.close == "function"){
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this.closeButton.set("onClick", lang.hitch(parent, 'close'));
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}else{
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domStyle.set(this.closeButton.domNode, { display: "none" }); // hide the button
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}
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// add one row at the start
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this.createFunction();
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// make the graph bounds appear initially
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this.array[0][this.checkboxIndex].set("checked", true);
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this.onDraw();
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this.erase(0);
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this.array[0][this.expressionIndex].value = "";
|
|
}
|
|
});
|
|
|
|
return lang.mixin(calc, {
|
|
draw: function(/*Chart*/ chart, /*Function*/ functionToGraph, params){
|
|
// summary
|
|
// graph a chart with the given function.
|
|
// params
|
|
// chart is a dojox.charting.Chart object, functionToGraph is a function with one numeric parameter (x or y typically)
|
|
// and params is an Object the can contain the number of the graph in the chart it is (an integer), a boolean saying if the functionToGraph is a function of x (otherwise y)
|
|
// and the color, which is an object with a stroke with a color's name eg: color:{stroke:"black"}
|
|
|
|
params = lang.mixin({}, defaultParams, params);
|
|
chart.fullGeometry();
|
|
var x;
|
|
var y;
|
|
var points;
|
|
if(params.fOfX==true){
|
|
x = 'x';
|
|
y = 'y';
|
|
points = calc.generatePoints(functionToGraph, x, y, chart.axes.x.scaler.bounds.span, chart.axes.x.scaler.bounds.lower, chart.axes.x.scaler.bounds.upper, chart.axes.y.scaler.bounds.lower, chart.axes.y.scaler.bounds.upper);
|
|
}else{
|
|
x = 'y';
|
|
y = 'x';
|
|
points = calc.generatePoints(functionToGraph, x, y, chart.axes.y.scaler.bounds.span, chart.axes.y.scaler.bounds.lower, chart.axes.y.scaler.bounds.upper, chart.axes.x.scaler.bounds.lower, chart.axes.x.scaler.bounds.upper);
|
|
}
|
|
|
|
var i = 0;
|
|
|
|
if(points.length > 0){
|
|
for(; i < points.length; i++){
|
|
if(points[i].length>0){
|
|
chart.addSeries("Series "+params.graphNumber+"_"+i, points[i], params.color);
|
|
}
|
|
}
|
|
}
|
|
// you only need to remove the excess i's
|
|
var name = "Series "+params.graphNumber+"_"+i;
|
|
while(name in chart.runs){
|
|
chart.removeSeries(name);
|
|
i++;
|
|
name = "Series "+params.graphNumber+"_"+i;
|
|
}
|
|
chart.render();
|
|
return points;
|
|
},
|
|
|
|
generatePoints: function(/*Function*/ funcToGraph, /*String*/ x, /*String*/ y, /*Number*/ width, /*Number*/ minX, /*Number*/ maxX, /*Number*/ minY, /*Number*/ maxY){
|
|
// summary:
|
|
// create the points with information about the graph.
|
|
// params:
|
|
// funcToGraph is a function with one numeric parameter (x or y typically)
|
|
// x and y are Strings which always have the values of "x" or "y". If y="x" and x="y" then it is creating points for the function as though it was a function of y
|
|
// Number minX, Number maxX, Number minY, Number maxY are all bounds of the chart. If x="y" then maxY should be the maximum bound of x rather than y
|
|
// Number width is the pixel width of the chart
|
|
// output:
|
|
// an array of arrays of points
|
|
var pow2 = (1 << Math.ceil(Math.log(width) / log2));
|
|
var
|
|
dx = (maxX - minX) / pow2, // divide by 2^n instead of width to avoid loss of precision
|
|
points = [], // [{x:value, y:value2},...]
|
|
series = 0,
|
|
slopeTrend,
|
|
slopeTrendTemp;
|
|
|
|
points[series] = [];
|
|
|
|
var i = minX, k, p;
|
|
for(var counter = 0; counter <= pow2; i += dx, counter++){
|
|
p = {};
|
|
p[x] = i;
|
|
p[y] = funcToGraph({_name:x, _value:i, _graphing:true});//funcToGraph(i);
|
|
if(p[x] == null || p[y] == null){
|
|
return {};// someone pushed cancel in the val code
|
|
}
|
|
if(isNaN(p[y]) || isNaN(p[x])){
|
|
continue;
|
|
}
|
|
points[series].push(p);
|
|
|
|
if(points[series].length == 3){
|
|
slopeTrend = getSlopePairTrend(slope(points[series][points[series].length - 3], points[series][points[series].length-2]), slope(points[series][points[series].length-2], points[series][points[series].length-1]));
|
|
continue;
|
|
}
|
|
if(points[series].length < 4){
|
|
continue;
|
|
}
|
|
|
|
slopeTrendTemp = getSlopePairTrend(slope(points[series][points[series].length - 3], points[series][points[series].length-2]), slope(points[series][points[series].length-2], points[series][points[series].length-1]));
|
|
if(slopeTrend.inc != slopeTrendTemp.inc || slopeTrend.pos != slopeTrendTemp.pos){
|
|
// var a = asymptoteSearch(funcToGraph, points[series][points[series].length - 2], points[series][points[series].length-1]);
|
|
var a = asymptoteSearch(funcToGraph, points[series][points[series].length - 3], points[series][points[series].length-1]);
|
|
p = points[series].pop();
|
|
// this pop was added after changing the var a line above
|
|
points[series].pop();
|
|
for(var j = 0; j < a[0].length; j++){
|
|
points[series].push(a[0][j]);
|
|
}
|
|
for(k = 1; k < a.length; k++){
|
|
points[++series] = a.pop();
|
|
}
|
|
points[series].push(p);
|
|
slopeTrend = slopeTrendTemp;
|
|
}
|
|
}
|
|
while(points.length > 1){
|
|
for(k = 0; k < points[1].length; k++){
|
|
if(points[0][points[0].length - 1][x] == points[1][k][x]){
|
|
continue;
|
|
}
|
|
points[0].push(points[1][k]);
|
|
}
|
|
points.splice(1, 1);
|
|
}
|
|
points = points[0];
|
|
|
|
// make new series when it goes off the graph
|
|
var s = 0;
|
|
var points2 = [ [] ];
|
|
for(k = 0; k < points.length; k++){
|
|
var x1, y1, b, slope1;
|
|
if(isNaN(points[k][y]) || isNaN(points[k][x])){
|
|
while(isNaN(points[k][y]) || isNaN(points[k][x])){
|
|
points.splice(k, 1);
|
|
}
|
|
points2[++s] = [];
|
|
k--;
|
|
}else if(points[k][y] > maxY || points[k][y] < minY){
|
|
// make the last point's y equal maxY and find a matching x
|
|
if(k > 0 && points[k - 1].y!=minY && points[k - 1].y!=maxY){
|
|
slope1 = slope(points[k - 1], points[k]);
|
|
if(slope1 > bigNumber){
|
|
slope1 = bigNumber;
|
|
}else if(slope1 < -bigNumber){
|
|
slope1 = -bigNumber;
|
|
}
|
|
if(points[k][y] > maxY){
|
|
y1 = maxY;
|
|
}else{
|
|
y1 = minY;
|
|
}
|
|
b = points[k][y] - slope1 * points[k][x];
|
|
x1 = (y1 - b) / slope1;
|
|
|
|
p = {};
|
|
p[x] = x1;
|
|
p[y] = funcToGraph(x1);//y1;//
|
|
|
|
if(p[y]!=y1){
|
|
p = findMinOrMaxY(funcToGraph, points[k - 1], points[k], y1);
|
|
}
|
|
|
|
points2[s].push(p);
|
|
// setup the next series
|
|
points2[++s] = []
|
|
}
|
|
var startK = k;
|
|
while(k < points.length && (points[k][y] > maxY || points[k][y] < minY)){
|
|
k++;
|
|
}
|
|
if(k >= points.length){
|
|
if(points2[s].length == 0){
|
|
points2.splice(s, 1);
|
|
}
|
|
break;
|
|
}
|
|
// connect the end graph
|
|
if(k > 0 && points[k].y != minY && points[k].y != maxY){
|
|
slope1 = slope(points[k - 1], points[k]);
|
|
if(slope1 > bigNumber){
|
|
slope1 = bigNumber;
|
|
}else if(slope1 < -bigNumber){
|
|
slope1 = -bigNumber;
|
|
}
|
|
if(points[k - 1][y] > maxY){
|
|
y1 = maxY;
|
|
}else{
|
|
y1 = minY;
|
|
}
|
|
b = points[k][y] - slope1 * points[k][x];
|
|
x1 = (y1 - b) / slope1;
|
|
|
|
p = {};
|
|
p[x] = x1;
|
|
p[y] = funcToGraph(x1);//y1;//
|
|
if(p[y]!=y1){
|
|
p = findMinOrMaxY(funcToGraph, points[k - 1], points[k], y1);
|
|
}
|
|
points2[s].push(p);
|
|
points2[s].push(points[k]);
|
|
}
|
|
}else{
|
|
points2[s].push(points[k]);
|
|
}
|
|
}
|
|
return points2;
|
|
|
|
function findMinOrMaxY(funcToGraph, left, right, minMaxY){
|
|
|
|
while(left<=right){
|
|
var midX = (left[x]+right[x])/2;
|
|
var mid = {};
|
|
mid[x] = midX;
|
|
mid[y] = funcToGraph(mid[x]);
|
|
|
|
if(minMaxY==mid[y]||mid[x]==right[x]||mid[x]==left[x]){
|
|
return mid;
|
|
}
|
|
|
|
var moveTowardsLarger = true;
|
|
if(minMaxY<mid[y]){
|
|
moveTowardsLarger = false;
|
|
}
|
|
|
|
if(mid[y]<right[y]){
|
|
if(moveTowardsLarger){
|
|
left = mid;
|
|
}else{
|
|
right = mid;
|
|
}
|
|
}else if(mid[y]<left[y]){
|
|
if(!moveTowardsLarger){
|
|
left = mid;
|
|
}else{
|
|
right = mid;
|
|
}
|
|
}
|
|
}
|
|
return NaN;
|
|
}
|
|
|
|
function asymptoteSearch(funcToGraph, pointStart, pointStop){
|
|
var
|
|
pointTemp = [ [], [] ],
|
|
left = pointStart,
|
|
right = pointStop,
|
|
midpoint;
|
|
|
|
|
|
while(left[x] <= right[x]){
|
|
var midX = (left[x] + right[x]) / 2;
|
|
|
|
midpoint = {};
|
|
midpoint[x] = midX;
|
|
midpoint[y] = funcToGraph(midX);
|
|
|
|
var rx = nextNumber(midpoint[x]);
|
|
var rightPoint = {};
|
|
rightPoint[x] = rx;
|
|
rightPoint[y] = funcToGraph(rx);
|
|
|
|
if(Math.abs(rightPoint[y]) >= Math.abs(midpoint[y])){
|
|
pointTemp[0].push(midpoint);
|
|
left = rightPoint;
|
|
}else{
|
|
pointTemp[1].unshift(midpoint);
|
|
if(right[x] == midpoint[x]){
|
|
break;
|
|
}
|
|
right = midpoint;
|
|
}
|
|
|
|
}
|
|
return pointTemp;
|
|
}
|
|
|
|
function getSlopePairTrend(slope1, slope2){
|
|
var
|
|
isInc = false,
|
|
isPos = false;
|
|
|
|
if(slope1 < slope2){
|
|
isInc = true;
|
|
}
|
|
if(slope2 > 0){
|
|
isPos = true;
|
|
}
|
|
return { inc: isInc, pos: isPos };
|
|
}
|
|
|
|
function nextNumber(v){
|
|
var delta;
|
|
if(v > -1 && v < 1){
|
|
if(v < 0){ // special handling as we approach 0
|
|
if(v >= -epsilon){
|
|
delta = -v; // always stop at 0
|
|
}else{
|
|
delta = v / Math.ceil(v / epsilon); // divide distance to 0 into equal tiny chunks
|
|
}
|
|
}else{
|
|
delta = epsilon;
|
|
}
|
|
}else{
|
|
delta = Math.abs(v) * epsilon;
|
|
}
|
|
return v + delta;
|
|
}
|
|
|
|
function slope(p1, p2){
|
|
return (p2[y] - p1[y]) / (p2[x] - p1[x]);
|
|
}
|
|
},
|
|
Grapher: Grapher
|
|
});
|
|
});
|