D3.js curveCardinal() 方法

curveCardinal ()方法生成三次基数样条。该曲线也基于这些三次基数样条。

句法：

d3.curveCardinal()

参数：此方法不接受任何参数。

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.curveCardinal);
  
        d3.select("#gfg")
            .append("path")
            .attr("d", line(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.curveCardinal);
  
        d3.select("#gfg")
            .append("path")
            .attr("d", Gen(points))
            .attr("fill", "none")
            .attr("stroke", "green");
    

  

输出：