chart = {
const svg = d3.create("svg").attr("viewBox", [0, 0, width, height]);
svg
.append("rect")
.attr("x", 0)
.attr("y", 0)
.attr("width", width)
.attr("height", height)
.attr("fill", "#28343e");
svg
.selectAll(".planetsTraj")
.data(planets)
.enter()
.append("circle")
.attr("transform", (d) => `rotate(10) translate(0 -100)`)
.attr("cx", -width / 2)
.attr("cy", height / 2)
.attr("r", (d) => sizeTrajScale(d.distance))
.attr("class", "planetsTraj")
.style("stroke", "gray")
.style("stroke-width", 0.5)
.style("fill", "none");
svg
.selectAll(".stars")
.data(stars)
.enter()
.append("circle")
.attr("cx", (d) => xStars(d.x))
.attr("cy", (d) => yStars(d.y))
.attr("r", (d) => rStars(d.r))
.attr("fill", "#fff")
.attr("class", "stars");
const gradientRadial = svg
.append("defs")
.selectAll("radialGradient")
.data(planets)
.enter()
.append("radialGradient")
.attr("id", function (d) {
return "gradient-" + d.name;
})
.attr("cx", "15%")
.attr("cy", "50%")
.attr("r", "85%");
gradientRadial
.append("stop")
.attr("offset", "0%")
.attr("stop-color", function (d) {
return d3.rgb(d.color).brighter(1);
});
gradientRadial
.append("stop")
.attr("offset", "50%")
.attr("stop-color", function (d) {
return d.color;
});
gradientRadial
.append("stop")
.attr("offset", "100%")
.attr("stop-color", function (d) {
return d3.rgb(d.color).darker(2.5);
});
svg
.selectAll(".planets")
.data(planets)
.enter()
.append("circle")
.attr("transform", (d) => `rotate(10) translate(0 -100)`)
.attr("cx", (d) => x(d.distance))
.attr("cy", height / 2)
.attr("r", (d) => sizeScale(d.size))
.attr("class", "planets")
.style("fill", function (d) {
return "url(#gradient-" + d.name + ")";
});
return svg.node();
}
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