是否可以在p5JavaScript中创建对象的数组列表?

时间:2018-04-08 19:48:46

标签: arrays arraylist charts var p5.js

我正在使用p5JavaScript进行Stacked Bar Chart Demo,如下面的代码片段所示。

基本上,我想在X& Y Axis上有两个系列的数据:

1)数组(var)

2)数组 - 变量列表(var1,var2,var3,...)。

我发现的唯一参考是下面提供的链接: https://sites.google.com/site/processingp5js/data-structures/arraylist

如果有人知道如何创建“对象类”或数组列表,请告诉我。

脚本如下所示:

//REFERENCES:
//   https://sites.google.com/site/processingp5js/data-structures/arraylist

/* Needed Variables Declaration */
var arrayOfMonths = ["dd/mm/yy","dd/mm/yy","dd/mm/yy","dd/mm/yy","dd/mm/yy","dd/mm/yy","dd/mm/yy","dd/mm/yy","dd/mm/yy","dd/mm/yy"];
var arrayOfResponses = ["num","num","num","num","num","num","num"];

/* Calculated Variables */
var numOfMonths = arrayOfMonths.length;
var numOfResponses = arrayOfResponses.length;

/* Variables Declaration */
var canvasWidth = numOfMonths * 100;
var canvasHeight = numOfResponses * 100;

function setup() {
  createCanvas(canvasWidth, canvasHeight);
} 

function draw() {
  background(255); //White Background Color
	chartBase(); //Add X,Y Axis
  addPointers(numOfResponses, numOfMonths); //Add Pointers
  addTextToPointers(); //Add Text to pointers
  //addValues(); //Add the Bars (Values) of the Chart
}

function chartBase(){
  
  /* DRAW X AXIS */
  line(canvasWidth-(canvasWidth-50), canvasHeight-100,
       (canvasWidth-50)+25, canvasHeight-100);
  
  /* DRAW Y AXIS */
	line(canvasHeight-(canvasHeight-100),canvasHeight-(canvasHeight-50)-25,
       canvasHeight-(canvasHeight-100),canvasHeight-50);	
}

function addPointers(numOfResponses, numOfMonths){
  
  var spaceBetweenX = canvasWidth - (canvasWidth-150);
	var spaceBetweenY = canvasHeight- 150;
  
  /* ADD POINTERS TO X AXIS */
  for(var x=0; x<numOfMonths; x++){
    
  	ellipse(spaceBetweenX,canvasHeight-100,10,10);
    spaceBetweenX += canvasWidth/numOfMonths;
  }
  
  /* ADD POINTERS TO Y AXIS */
  for(var y=0; y<numOfResponses; y++){
    
  	ellipse(canvasWidth-(canvasWidth-100), spaceBetweenY, 10, 10);
    spaceBetweenY -= canvasHeight/numOfResponses;
  }
  
}

function addTextToPointers(){

  var spaceBetweenX = canvasWidth-(canvasWidth-125);
	var spaceBetweenY=(canvasHeight-100)-50;
  textSize(13);
  
  /* ADD TEXT TO X AXIS */
  for(var x=0; x<numOfMonths; x++){
    
  	var currentText = arrayOfMonths[x];
    text(currentText, spaceBetweenX, (canvasHeight-75));
    spaceBetweenX+=canvasWidth/numOfMonths;
  }
  
  /* ADD TEXT TO Y AXIS */
  for(var y=0; y<numOfResponses; y++){
  
    var currentText = arrayOfResponses[y];
    text(currentText, (canvasWidth-(canvasWidth-60)), spaceBetweenY);
    spaceBetweenY -= canvasHeight/numOfResponses;
  }
}
html, body {
  margin: 0;
  padding: 0;
}
<!DOCTYPE html>
<html>
  <head>
    <script src="https://cdnjs.cloudflare.com/ajax/libs/p5.js/0.6.0/p5.min.js"></script>
    <script src="https://cdnjs.cloudflare.com/ajax/libs/p5.js/0.6.0/addons/p5.dom.min.js"></script>
    <script src="https://cdnjs.cloudflare.com/ajax/libs/p5.js/0.6.0/addons/p5.sound.min.js"></script>
    <link rel="stylesheet" type="text/css" href="style.css">
    <meta charset="utf-8" />

  </head>
  <body>
    <script src="sketch.js"></script>
  </body>
</html>

1 个答案:

答案 0 :(得分:0)

只需使用数组。

JavaScript中的数组与Java或Processing中的ArrayList类非常相似。它们的大小可以更改,您可以动态添加或删除元素。

查看W3SchoolsMDN以获取有关JavaScript中数组的教程,或只是google&#34; javascript数组&#34;大量的结果。