d3.js quadraticCurveTo()用法及代码示例

d3.path.quadraticCurveTo()函数用于通过特定控制点从当前点将二次贝塞尔曲线段绘制到特定点。

用法:

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

参数：它采用上面给出和下面描述的四个参数。

cpx:它是二次控制点的x坐标。
cpy:它是二次控制点的y坐标。
x:它是终点的x坐标。
y:它是终点的y坐标。

范例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>

输出：

范例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>

输出：

相关用法

注：本文由纯净天空筛选整理自tarun007大神的英文原创作品 D3.js quadraticCurveTo() Function。非经特殊声明，原始代码版权归原作者所有，本译文未经允许或授权，请勿转载或复制。