All triangle demos provided for approval
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206
amber.html
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206
amber.html
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<!DOCTYPE html>
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<html lang="en">
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<head>
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<meta charset="UTF-8" />
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<title>3-Axis Radar Chart with Ticks</title>
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<script src="https://d3js.org/d3.v7.min.js"></script>
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<style>
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body {
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font-family: sans-serif;
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margin: 0;
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padding: 0;
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background-color: white;
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}
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svg {
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background: white;
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display: block;
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margin: auto;
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}
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.axis line {
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stroke: black;
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stroke-width: 1.5px;
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}
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line.tick {
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stroke: black;
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stroke-width: 1;
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}
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polygon.grid {
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fill: none;
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stroke: rgba(200, 200, 200, 0.5); /* light grey with 50% opacity */
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stroke-dasharray: 2,2;
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}
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//.area {
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// fill: rgba(215, 96, 35, 0.1); /* steelblue with transparency */
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// stroke: rgba(215, 96, 35, 0.6);
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// stroke-width: 2;
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//}
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.label {
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font-size: 12px;
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font-weight: bold;
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text-anchor: middle;
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}
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</style>
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</head>
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<body>
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<svg width="500" height="500"></svg>
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<script>
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const svg = d3.select("svg");
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const width = +svg.attr("width");
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const height = +svg.attr("height");
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const radius = 200;
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const center = { x: width / 2, y: height / 2 };
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// Define axes with A at the top (rotate -90 degrees)
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const axes = [
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{ name: "Feature A", angle: 0 },
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{ name: "Feature B", angle: 120 },
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{ name: "Feature C", angle: 240 }
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];
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axes.forEach(d => d.angle = (d.angle - 90) * Math.PI / 180);
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// Sample data: [0-1] scale
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const values = [0.8, 0.4, 0.6];
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// Draw axis lines
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svg.append("g")
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.attr("class", "axis")
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.selectAll("line")
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.data(axes)
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.join("line")
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.attr("x1", center.x)
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.attr("y1", center.y)
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.attr("x2", d => center.x + radius * Math.cos(d.angle))
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.attr("y2", d => center.y + radius * Math.sin(d.angle));
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// Draw grid rings (polygons)
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const levels = 7;
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for (let i = 1; i <= levels; i++) {
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const r = (radius / levels) * i;
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const points = axes.map(d => {
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return [
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center.x + r * Math.cos(d.angle),
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center.y + r * Math.sin(d.angle)
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];
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});
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svg.append("polygon")
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.attr("class", "grid")
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.attr("points", points.map(p => p.join(",")).join(" "));
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}
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// Draw axis ticks
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const tickLength = 5;
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axes.forEach(axis => {
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for (let i = 1; i <= levels; i++) {
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const r = (radius / levels) * i;
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const angle = axis.angle;
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const x1 = center.x + r * Math.cos(angle);
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const y1 = center.y + r * Math.sin(angle);
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// Perpendicular tick
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const perpAngle = angle + Math.PI / 2;
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const x2 = x1 + tickLength * Math.cos(perpAngle);
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const y2 = y1 + tickLength * Math.sin(perpAngle);
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svg.append("line")
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.attr("x1", x1)
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.attr("y1", y1)
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.attr("x2", x2)
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.attr("y2", y2)
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.attr("class", "tick");
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}
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});
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// Convert values to coordinates
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const valuePoints = axes.map((d, i) => {
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const r = radius * values[i];
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return [
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center.x + r * Math.cos(d.angle),
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center.y + r * Math.sin(d.angle)
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];
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});
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// Draw data area
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svg.append("polygon")
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.attr("class", "area")
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.attr("points", valuePoints.map(p => p.join(",")).join(" "))
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.attr("fill", "#ffbf00") // #d76a23 with 30% opacity (translucent)
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.attr("fill-opacity", 0.6)
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.attr("stroke", "#ffbf00") // Outer line color
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.attr("stroke-width", 2); // Thin outer line
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// Draw outer triangle border (goes to edge of chart)
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const outerPoints = axes.map(d => [
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center.x + radius * Math.cos(d.angle),
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center.y + radius * Math.sin(d.angle)
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]);
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// Draw border separately (on top)
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svg.append("polygon")
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.attr("points", outerPoints.map(p => p.join(",")).join(" "))
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.attr("fill","none")
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.attr("stroke", "#d76a23") // Outer line color
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.attr("stroke-width", 3); // Thin outer line
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// Put label in bottom centre of triangle
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const bottomLeft = outerPoints[1];
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const bottomRight = outerPoints[2];
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const midX = (bottomLeft[0] + bottomRight[0]) / 2;
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const midY = (bottomLeft[1] + bottomRight[1]) / 2;
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svg.append("text")
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.attr("x", midX)
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.attr("y", midY - 15) // Alter for correct height
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.attr("text-anchor", "middle")
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.attr("fill", "black") /// My Colour
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.attr("font-size", "24px")
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.attr("font-weight", "bold")
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.text("Approach");
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// And now a central number
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svg.append("text")
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.attr("x", midX)
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.attr("y", midY -60)
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.attr("text-anchor", "middle")
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.attr("fill", "black") // 🎨 customize color
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.attr("font-size", "22px")
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.attr("font-weight", "bold")
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.attr("font-family", "Courier New, monospace")
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.text("-2.1");
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// Add axis labels
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/*
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svg.selectAll(".label")
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.data(axes)
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.join("text")
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.attr("class", "label")
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.attr("x", d => center.x + (radius + 20) * Math.cos(d.angle))
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.attr("y", (d,i) => {
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if (i === 0) { //adjust for 1st access, rather than using d.name
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return center.y + (radius + 20) * Math.sin(d.angle)
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} else
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return center.y + (radius + 20 + 30) * Math.sin(d.angle)
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})
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.text(d => d.name);
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*/
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</script>
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</body>
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</html>
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