d3.js画矢量图+可拖拽的实现思路

2021-09-24 10:24:28 浏览数 (1)
代码语言：javascript复制
<html>  
  <head>  
        <meta charset="utf-8">  
        <title>Arrow</title>  
  </head> 
<body>  
<script src="d3.v3.min.js" charset="utf-8"></script>  
<script> 

var width  = 400;
var height = 400;

var svg = d3.select("body").append("svg")
        .attr("width", width)
        .attr("height", height);

var defs = svg.append("defs");

var arrowMarker = defs.append("marker")
                        .attr("id","arrow")
                        .attr("markerUnits","strokeWidth")
                        .attr("markerWidth","12")
                        .attr("markerHeight","12")
                        .attr("viewBox","0 0 12 12") 
                        .attr("refX","6")
                        .attr("refY","6")
                        .attr("orient","auto");

var arrow_path = "M2,2 L10,6 L2,10 L6,6 L2,2";

arrowMarker.append("path")
            .attr("d",arrow_path)
            .attr("fill","#000");

var line = svg.append("line")
             .attr("x1",0)
             .attr("y1",0)
             .attr("x2",200)
             .attr("y2",50)
             .attr("stroke","red")
             .attr("stroke-width",2)
             .attr("marker-end","url(#arrow)");

var curve_path = "M20,70 T80,100 T160,80 T200,90";

var curve = svg.append("path")
             .attr("d",curve_path)
             .attr("fill","white")
             .attr("stroke","red")
             .attr("stroke-width",2)
             .attr("marker-start","url(#arrow)")
             .attr("marker-mid","url(#arrow)")
             .attr("marker-end","url(#arrow)");


</script>  
</body>  
</html>
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