D3.js curveBundle.beta() 方法

束曲线插值器创建拉直的三次基本样条曲线。样条曲线的拉直程度由插值器的beta值确定。有效的测试版 值范围介于 0 和 1 之间。在极端情况下，当beta值为1 时，曲线类似于 d3.curveBasis 生成的曲线，而当beta为0 时，曲线是第一个和最后一个控制点之间的直线。

句法：

d3.curveBundle.beta(beta_value)

参数：

• beta_value：给定曲线的 Beta 值，范围为 [0,1]

返回值：此方法不返回任何值。

示例 1：

HTML

  

    
    

  

    
        GeeksforGeeks
    
    
        
    
  
    
        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");
    

  

输出：

示例 2：

HTML

  

    
    

  

    
        GeeksforGeeks
    
    
        
    
      
    
        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");
    

  

输出：