d3-ext

d3 extensions

arrow between two points

given tow points and width, calculate a polygon ended with an arrow.

var p = d3.polya().layout( [ 100, 100 ],[ 40, 40 ],  10 );

svg.append( "g")
    .attr( "transform", p.transform() )
    .append( "polygon")
    .attr( "points", p.points())
    .style( "fill", "gray" );