d3.js curveBundle.beta()用法及代碼示例

束曲線插值器創建拉直的cubic基礎花鍵。花鍵的拉直程度取決於插值器的貝塔值。一個有效的貝塔值範圍介於0和1之間。Beta值是1曲線類似於由d3.curveBasis，測試版是0曲線是第一個和最後一個控製點之間的直線。

用法:

d3.curveBundle.beta(beta_value)

Parameters:

beta_value:曲線的Beta值範圍為[0,1]

返回值：此方法不返回任何值。

範例1：

HTML

<!DOCTYPE html> 
<html> 
<meta charset="utf-8"> 
  
<head> 
    <script src= 
"https://cdnjs.cloudflare.com/ajax/libs/d3/4.2.2/d3.min.js"> 
    </script> 
</head> 
  
<body> 
    <h1 style="text-align:center; color:green;"> 
        GeeksforGeeks 
    </h1> 
    <center> 
        <svg id="gfg" width="200" height="200"></svg> 
    </center> 
  
    <script> 
        var data = [ 
            { x:0, y:0 }, 
            { x:1, y:3 }, 
            { x:2, y:15 }, 
            { x:5, y:15 }, 
            { x:6, y:1 }, 
            { x:7, y:5 }, 
            { x:8, y:1 }]; 
  
        var xScale = d3.scaleLinear() 
            .domain([0, 8]).range([25, 175]); 
        var yScale = d3.scaleLinear() 
            .domain([0, 20]).range([175, 25]); 
  
        var line = d3.line() 
            .x((d) => xScale(d.x)) 
            .y((d) => yScale(d.y)) 
            .curve(d3.curveBundle.beta(.25)); 
  
        var line1 = d3.line() 
            .x((d) => xScale(d.x)) 
            .y((d) => yScale(d.y)) 
            .curve(d3.curveBundle.beta(.5)); 
  
        var line2 = d3.line() 
            .x((d) => xScale(d.x)) 
            .y((d) => yScale(d.y)) 
            .curve(d3.curveBundle.beta(.75)); 
  
        var line3 = d3.line() 
            .x((d) => xScale(d.x)) 
            .y((d) => yScale(d.y)) 
            .curve(d3.curveBundle.beta(1)); 
  
        d3.select("#gfg") 
            .append("path") 
            .attr("d", line(data)) 
            .attr("fill", "none") 
            .attr("stroke", "green"); 
  
        d3.select("#gfg") 
            .append("path") 
            .attr("d", line1(data)) 
            .attr("fill", "none") 
            .attr("stroke", "green"); 
  
        d3.select("#gfg") 
            .append("path") 
            .attr("d", line2(data)) 
            .attr("fill", "none") 
            .attr("stroke", "green"); 
  
        d3.select("#gfg") 
            .append("path") 
            .attr("d", line3(data)) 
            .attr("fill", "none") 
            .attr("stroke", "green"); 
    </script> 
</body> 
  
</html>

輸出：

範例2：

HTML

<!DOCTYPE html> 
<html> 
<meta charset="utf-8"> 
  
<head> 
    <script src= 
"https://cdnjs.cloudflare.com/ajax/libs/d3/4.2.2/d3.min.js"> 
    </script> 
</head> 
  
<body> 
    <h1 style="text-align:center; color:green;"> 
        GeeksforGeeks 
    </h1> 
    <center> 
        <svg id="gfg" width="200" height="200"></svg> 
    </center> 
      
    <script> 
        var points = [ 
            { xpoint:25, ypoint:150 }, 
            { xpoint:75, ypoint:85 }, 
            { xpoint:100, ypoint:115 }, 
            { xpoint:175, ypoint:25 }, 
            { xpoint:200, ypoint:150 }]; 
  
        var Gen = d3.line() 
            .x((p) => p.xpoint) 
            .y((p) => p.ypoint) 
            .curve(d3.curveBundle.beta(.25)); 
  
        var Gen1 = d3.line() 
            .x((p) => p.xpoint) 
            .y((p) => p.ypoint) 
            .curve(d3.curveBundle.beta(.5)); 
  
        var Gen2 = d3.line() 
            .x((p) => p.xpoint) 
            .y((p) => p.ypoint) 
            .curve(d3.curveBundle.beta(.75)); 
  
        var Gen3 = d3.line() 
            .x((p) => p.xpoint) 
            .y((p) => p.ypoint) 
            .curve(d3.curveBundle.beta(1)); 
  
        d3.select("#gfg") 
            .append("path") 
            .attr("d", Gen(points)) 
            .attr("fill", "none") 
            .attr("stroke", "green"); 
  
        d3.select("#gfg") 
            .append("path") 
            .attr("d", Gen1(points)) 
            .attr("fill", "none") 
            .attr("stroke", "green"); 
  
        d3.select("#gfg") 
            .append("path") 
            .attr("d", Gen2(points)) 
            .attr("fill", "none") 
            .attr("stroke", "green"); 
  
        d3.select("#gfg") 
            .append("path") 
            .attr("d", Gen3(points)) 
            .attr("fill", "none") 
            .attr("stroke", "green"); 
    </script> 
</body> 
  
</html>

輸出：

相關用法

注：本文由純淨天空篩選整理自taran910大神的英文原創作品 D3.js curveBundle.beta() Method。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。