arc static

forked from lindep's block: arc with datum

<!DOCTYPE html>
  <head>
    <meta charset="utf-8">
    <script src="https://cdnjs.cloudflare.com/ajax/libs/d3/3.5.5/d3.min.js"></script>
    <style>
      body { margin:0;position:fixed;top:0;right:0;bottom:0;left:0; }
      svg { width: 100%; height: 100%; }
    </style>
  </head>

<body>  
    <script>
      var margin = {top: 20, right: 10, bottom: 20, left: 17};
      var width = 960 - margin.left - margin.right;
      var height = 500 - margin.top - margin.bottom;
      var svg = d3.select("body").append("svg")
        .attr("width", width + margin.left + margin.right)
        .attr("height", height + margin.top + margin.bottom);
      
      svg.append("g")
        .attr("class","myclass")
        .attr("transform", "translate(" + margin.left + "," + margin.top + ")");
		
      var x=191,y=157;
      var rad=39;
      var angle=31;
      var data = {x:100,y:100,a:angle}
      
      var arc=d3.svg.arc()
        .innerRadius(0)
        .outerRadius(rad)
        .startAngle((angle-22)*(Math.PI/180))
        .endAngle((angle+22)*(Math.PI/180));
			//console.log(arc.centroid());
      
			var group = d3.select('g.myclass')
        .append('svg:g')
      	.attr("class","myclassb");
      
      group.append('path')
      	.attr('d',arc)
        .attr("transform", "translate("+x+","+y+")")
        .attr('fill','cyan')
        .attr('strokeWidth',1);
      
      var X = arc.centroid()[0] + rad/1.3 * Math.cos((angle-90)*(Math.PI/180));
      var Y = arc.centroid()[1] + rad/1.3 * Math.sin((angle-90)*(Math.PI/180));
      var t_anchor = angle > 0 && angle < 180 ? "start" : "end";
      group.append('svg:text')
        .text("testss")
        .attr('x',x)
        .attr('y',y)
        .attr("fill","black")
        .attr('stroke-width',.3)
        .attr("transform", "translate("+X+","+Y+")")
        .attr("font-size",14)
        .attr("text-anchor", t_anchor);
      
    </script>
  </body>

https://cdnjs.cloudflare.com/ajax/libs/d3/3.5.5/d3.min.js