d3.js quadraticCurveTo()用法及代碼示例

d3.path.quadraticCurveTo()函數用於通過特定控製點從當前點將二次貝塞爾曲線段繪製到特定點。

用法:

path.quadraticCurveTo(cpx, cpy, x, y)

參數：它采用上麵給出和下麵描述的四個參數。

cpx:它是二次控製點的x坐標。
cpy:它是二次控製點的y坐標。
x:它是終點的x坐標。
y:它是終點的y坐標。

範例1：

HTML

<!DOCTYPE html> 
<html lang="en"> 
  
<head> 
    <meta charset="UTF-8"> 
    <meta name="viewport" path1tent= 
        "width=device-width,initial-scale=1.0"> 
  
    <script src= 
        "https://d3js.org/d3.v4.min.js"> 
    </script> 
  
    <style> 
        h1 { 
            color:green; 
        } 
  
        svg { 
            background-color:#f2f2f2; 
        } 
  
        .path2 { 
            stroke:#000; 
        } 
    </style> 
</head> 
  
<body> 
    <div> 
        <h1>GeeksforGeeks</h1> 
        <b>D3.js | Path.quadraticCurveTo() Function</b> 
        <br><br> 
  
        <svg width="100" height="100"> 
            <path class="path2"> 
        </svg> 
    </div> 
  
    <script> 
          
        // Creating a path  
        var path = d3.path(); 
        path.moveTo(50, 50); 
        path.quadraticCurveTo(95, 0, 50, 90) 
          
        // Closing the path  
        path.closePath(); 
        path.quadraticCurveTo(5, 0, 50, 90) 
          
        // Closing the path  
        path.closePath(); 
        d3.select(".path2").attr("d", path);  
    </script> 
</body> 
  
</html>

輸出：

範例2：

HTML

<!DOCTYPE html> 
<html lang="en"> 
  
<head> 
    <meta charset="UTF-8"> 
    <meta name="viewport" path1tent= 
        "width=device-width,initial-scale=1.0"> 
  
    <script src= 
        "https://d3js.org/d3.v4.min.js"> 
    </script> 
  
    <style> 
        h1 { 
            color:green; 
        } 
  
        svg { 
            background-color:#f2f2f2; 
        } 
  
        .path2 { 
            stroke:#000; 
        } 
    </style> 
</head> 
  
<body> 
    <div> 
        <h1>GeeksforGeeks</h1> 
        <b>D3.js | Path.quadraticCurveTo() Function</b> 
        <br><br> 
        <svg width="100" height="100"> 
            <path class="path2"> 
        </svg> 
    </div> 
      
    <script>; 
  
        // Creating a path  
        var path = d3.path(); 
        path.moveTo(10, 10); 
        path.quadraticCurveTo(95, 0, 50, 90) 
      
        // Closing the path  
        path.closePath(); 
        d3.select(".path2").attr("d", path);  
    </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 quadraticCurveTo() 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。