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SVG arg fadeout/gradient effect

I'm trying to create doughnut visualization using d3 with fadeout/gradient effect for each arc like this: enter image description here

I've tried to add 'filter: drop-shadow(0 0 10px color)' but it doesn't give me this effect, also, it spread on both sides.

So I moved to use two pies

  1. Outer solid color
  2. Inner with (hopefully) the fade out effect

I know in gradient I can make solid, then fade out but since I don't have a clear path to success, I split to two pies

I've tried to use both linearGradient & radialGradient on the second pie which seems like a step in a good direction, but the gradient effect changes as the arcs angles are different:

enter image description here

For the simplicity, currently I created a gradient filter for just one color as I'm not sure this is the solution for my problem...

I've added a snippet to help the helpers :)

const colors = ['red','green','purple','blue','orange','teal']
const data = [10,12,33,112,22,4];
const pie = d3.pie().padAngle(0.03);
const arcs = pie(data);

const svg = d3.select('body')
  .append('svg');
 
const svgDefs = svg.append('defs');

const mainGradient = svgDefs.append('radialGradient')
                .attr('id', 'mainGradient');

            mainGradient.append('stop')
                .attr('stop-color', 'red')
                .attr('offset', '10%');

            mainGradient.append('stop')
                .attr('stop-color', 'pink')
                .attr('offset', '90%');



d3.select('body')
  .style('position', 'relative')
  .append('svg')
  .style('position', 'absolute')
  .style('z-index', 10)
  .attr('width', 600)
  .attr('height', 600)
  .append("g")
  .attr("transform", "translate(100,100)")
  .selectAll('path')
  .data(arcs)
  .enter()
  .append('path')
  .attr('d', (a,b,c) => d3.arc()({...a, innerRadius: 96, outerRadius: 100}))
  .style('fill', (d, index) => colors[index])

 svg.style('position', 'absolute')
    .attr('width', 600)
    .attr('height', 600)
  .append("g")
    .attr("transform", "translate(100,100)")
    .selectAll('path')
    .data(arcs)
    .enter()
    .append('path')
      .transition()
      .attr('d', (a,b,c) => d3.arc()({...a, innerRadius: 0, outerRadius: 96}))
      .style('fill', 'url(#mainGradient)')
    
<html>
<script src="https://cdnjs.cloudflare.com/ajax/libs/d3/5.14.2/d3.min.js"></script>
<body>
</body>
</html>
Via Active questions tagged javascript - Stack Overflow https://ift.tt/t9AZyWC
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