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Last active September 19, 2017 20:38
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Polar Plot with Custom Shaded Region
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README.md

This is a prototype for a specific Path with Sharp Edges and Curve. I tried to create custom Path.

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index.html
<!DOCTYPE html>
<meta charset="utf-8">
<style>
.axis text {
font: 10px sans-serif;
}
.axis line,
.axis circle {
fill: none;
stroke: rgba(132, 132, 132, 0.4);
/*stroke-dasharray: 4,4;*/
}
.axis :last-of-type circle {
stroke: #333;
/*stroke-dasharray: none;*/
}
.line {
fill: rgba(255, 0, 0, 0.5);
stroke: rgba(255, 0, 0, 0.8);
stroke-width: 2px;
}
</style>
<body>
<script src="//d3js.org/d3.v3.min.js"></script>
<script>
/*var data = d3.range(0, 2 * Math.PI, .01).map(function(t) {
return [t, Math.sin(2 * t) * Math.cos(2 * t)];
});*/
var designData = [[172, 200],[2.86, 5.06]];
var maxVal = 16;
var data = [
[maxVal*Math.cos(designData[0][0]*Math.PI/180), maxVal*Math.sin(designData[0][0]*Math.PI/180)],
[maxVal*Math.cos(designData[0][1]*Math.PI/180), maxVal*Math.sin(designData[0][1]*Math.PI/180)],
[designData[1][1]*Math.cos(designData[0][1]*Math.PI/180), designData[1][1]*Math.sin(designData[0][1]*Math.PI/180)],
[designData[1][0]*Math.cos(designData[0][0]*Math.PI/180), designData[1][0]*Math.sin(designData[0][0]*Math.PI/180)]
];
var width = 960,
height = 600,
radius = Math.min(width, height) / 2 - 30;
var r = d3.scale.linear()
.domain([0, maxVal])
.range([0, radius]);
var path1 = "M" + r(data[0][0])+","+r(data[0][1])+" "+
"A"+ r(maxVal)+","+r(maxVal)+" 0 0,1 "+ r(data[1][0])+","+r(data[1][1])+" "+
"L" + r(data[2][0])+","+r(data[2][1])+" "+
"L" + r(data[3][0])+","+r(data[3][1])+" Z";
var svg = d3.select("body").append("svg")
.attr("width", width)
.attr("height", height)
.append("g")
.attr("transform", "translate(" + width / 2 + "," + height / 2 + ")");
var gr = svg.append("g")
.attr("class", "r axis")
.selectAll("g")
.data(r.ticks(8).slice(1))
.enter().append("g")
.attr("transform", "rotate(0)");
gr.append("circle")
.attr("r", r);
gr.append("text")
.attr("y", function(d) { return -r(d) - 4; })
.attr("transform", "rotate(45)")
.style("text-anchor", "middle")
.text(function(d) { return d; });
var ga = svg.append("g")
.attr("class", "a axis")
.selectAll("g")
.data(d3.range(0, 360, 30))
.enter().append("g")
.attr("transform", function(d) {
return "rotate(" + (d-90) + ")"; });
ga.append("line")
.attr("x2", radius);
ga.append("text")
.attr("x", (radius + 6))
.attr("dy", ".35em")
.style("text-anchor", function(d) { return d > 180 && d < 360 ? "end" : null; })
.attr("transform", function(d) { return d > 180 && d < 360 ? "rotate(180 " + (radius + 6) + ",0)" : null; })
.text(function(d) {
return d + "°"; });
svg.append("path")
.datum(data)
.attr("class", "line")
.attr("d", path1)
.attr("transform", function(d) {
return "rotate(" + (-90) + ")"; });
</script>
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