d3.js arc()用法及代碼示例

d3.arc()函數用於生成可生成圓圖的電弧發生器。它基於起始角度和終止角度之間的差異。

用法:

d3.arc();

參數：該函數不接受任何參數。

返回值：該函數返回電弧發生器函數。

以下示例說明了D3.js中的d3.arc()函數：

範例1：

HTML

<!DOCTYPE html>  
<html lang="en">  
  
<head>  
    <meta charset="UTF-8" />  
    <meta name="viewport"
          content="width=device-width,  
                   initial-scale=1.0"/>  
  
    <!--Fetching from CDN of D3.js -->
    <script src=  
        "https://d3js.org/d3.v6.min.js">  
    </script> 
</head>  
  
<body>  
    <div style="width:300px; height:300px;"> 
        <center> 
            <h1 style="color:green"> 
                GeeksforGeeks 
            </h1>  
  
            <h2> 
                d3.arc() 
            </h2>  
  
        </center> 
  
        <svg width="300" height="300"> 
        </svg> 
    </div> 
  
    <script>  
        var svg = d3.select("svg") 
            .append("g") 
            .attr("transform", "translate(150,50)"); 
  
        // Function is used 
        var arc = d3.arc() 
            .innerRadius(40) 
            .outerRadius(45) 
            .startAngle(100) 
            .endAngle(2 * 180); 
  
        svg.append("path") 
            .attr("class", "arc") 
            .attr("d", arc) 
            .attr("fill","green"); 
    </script>  
</body>  
  
</html>

輸出：

範例2：

HTML

<!DOCTYPE html>  
<html lang="en"> 
  
<head>  
    <meta charset="UTF-8" />  
    <meta name="viewport"
          content="width=device-width,  
                   initial-scale=1.0"/>  
  
    <!--Fetching from CDN of D3.js -->
    <script src=  
            "https://d3js.org/d3.v6.min.js">  
    </script> 
</head>  
  
<body>  
    <div style="width:300px; height:300px;"> 
        <center> 
  
            <h1 style="color:green"> 
                GeeksforGeeks 
            </h1>  
  
            <h2>d3.arc()</h2>  
        </center> 
  
        <svg width="300" height="300"> 
        </svg> 
    </div> 
  
    <script>  
        var svg = d3.select("svg") 
            .append("g") 
            .attr("transform", "translate(150,50)"); 
  
        // An arc will be created 
        var arc = d3.arc() 
            .innerRadius(40) 
            .outerRadius(45) 
            .startAngle(10) 
            .endAngle(8); 
  
        svg.append("path") 
            .attr("class", "arc") 
            .attr("d", arc) 
            .attr("fill","green"); 
    </script>  
</body>  
  
</html>

輸出：

範例3：

HTML

<!DOCTYPE html>  
<html lang="en">  
  
<head>  
    <meta charset="UTF-8" />  
    <meta name="viewport"
          content="width=device-width,  
                   initial-scale=1.0"/>  
       
    <!--Fetching from CDN of D3.js -->
    <script src=  
        "https://d3js.org/d3.v6.min.js">  
    </script> 
  
</head>  
  
<body>  
    <script>  
        var svg = d3.select("svg") 
            .append("g") 
            .attr("transform", "translate(150,50)"); 
  
        // An arc generator is produced 
        var arc = d3.arc() 
            .innerRadius(40) 
            .outerRadius(45) 
            .startAngle(10) 
            .endAngle(8); 
  
        let arr=arc().split(","); 
  
        arr.forEach((e,i)=>{ 
            console.log(i,e); 
        }) 
    </script>  
</body>  
  
</html>

輸出：

相關用法

注：本文由純淨天空篩選整理自tarun007大神的英文原創作品 D3.js arc() Function。非經特殊聲明，原始代碼版權歸原作者所有，本譯文未經允許或授權，請勿轉載或複製。