底部弧形切割为d3 js的矩形

Question

我只能得到矩形.无法弄清楚如何在底部生产切口？

define(['jquery', 'knockout', 'd3', 'data/server', 'css!app/css/vista'],function($, ko, d3, server){
	return {		
		activate: function(){
			
		},
		compositionComplete: function(){
			var self = this;						
			self.loadyourRank();
		},
		loadyourRank: function(){
			var data = [3];
			var width = 325, height = 430;
							
			var svgContainer = d3.select("#yourrank")
				.append("svg")
				.attr("width", width)
				.attr("height", height);
			
			svgContainer.selectAll("rect")
				.data(data)
				.enter()
				.append("rect")
				.attr("x", 30)
				.attr("y", 50)
				.attr("width", 255)
				.attr("height", 340)
				.attr("fill", "#F2135D")
				.attr("stroke", "gray");	
			
		}
    };
});

<div class="card">
	<div class="row">
		<div id="yourrank" class="col-xs-4">
			<h4>Your Rank</h4>
		</div>
		<div id="bestrank" class="col-xs-8">
			<h4>Your Best Ranked Specialities</h4>
		</div>		
	</div>		
</div>

如何使用d3.js在svg中获取上述形状或元素？有人帮忙

Answer 1

使用SVG路径.

d 属性计算

• 转到x,y
• 行到(x +宽度),y
• 线到(x +宽度),(y +高度)
• 从当前点到(x +宽度)/ 2的二次贝塞尔曲线,required_curve_height到x,(y + height)
• 关闭路径(终点到起点)

请参阅此处了解更多详情.

SVG <path>元素用于绘制从线条,弧线,曲线等组合的高级形状,有或没有填充.该<path>元素可能是最先进和多功能的SVG形状.

var data = [3];
var width = 325,
  height = 430;

var svgContainer = d3.select("#yourrank")
  .append("svg")
  .attr("width", width)
  .attr("height", height);

svgContainer.selectAll("path")
  .data(data)
  .enter()
  .append("path") 
  .attr("d", "M 30,50 L 285,50 L 285,390 Q 157.5,200  30,390 Z")
  .attr("fill", "#F2135D")
  .attr("stroke", "gray");

<script src="https://cdnjs.cloudflare.com/ajax/libs/d3/3.4.11/d3.min.js"></script>
<div id="yourrank"></div>