102 lines
2.9 KiB
JavaScript
102 lines
2.9 KiB
JavaScript
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// graph.js
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document.addEventListener('DOMContentLoaded', function() {
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const data = {
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nodes: [
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{ id: "Force", label: "Force" },
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{ id: "Mass", label: "Mass" },
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{ id: "Acceleration", label: "Acceleration" },
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{ id: "Gravity", label: "Gravity" },
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{ id: "Friction", label: "Friction" },
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{ id: "Motion", label: "Motion" }
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],
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links: [
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{ source: "Force", target: "Mass", relationship: "is_applied_on" },
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{ source: "Force", target: "Acceleration", relationship: "causes" },
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{ source: "Gravity", target: "Mass", relationship: "acts_on" },
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{ source: "Friction", target: "Motion", relationship: "opposes" },
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{ source: "Force", target: "Friction", relationship: "overcomes" }
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]
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};
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const width = 800;
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const height = 600;
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const svg = d3.select("#graph").append("svg")
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.attr("width", width)
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.attr("height", height);
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const simulation = d3.forceSimulation(data.nodes)
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.force("link", d3.forceLink(data.links).id(d => d.id).distance(200))
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.force("charge", d3.forceManyBody().strength(-500))
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.force("center", d3.forceCenter(width / 2, height / 2));
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const link = svg.append("g")
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.attr("stroke", "#999")
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.attr("stroke-opacity", 0.6)
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.selectAll("line")
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.data(data.links)
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.enter().append("line")
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.attr("stroke-width", d => Math.sqrt(d.value));
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const node = svg.append("g")
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.attr("stroke", "#fff")
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.attr("stroke-width", 1.5)
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.selectAll("circle")
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.data(data.nodes)
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.enter().append("circle")
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.attr("r", 10)
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.attr("fill", "red")
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.call(d3.drag()
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.on("start", dragstarted)
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.on("drag", dragged)
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.on("end", dragended));
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node.append("title")
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.text(d => d.id);
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// Add labels
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const labels = svg.append("g")
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.selectAll("text")
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.data(data.nodes)
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.enter().append("text")
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.attr("x", d => d.x)
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.attr("y", d => d.y)
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.attr("dy", -3)
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.attr("text-anchor", "middle")
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.text(d => d.label);
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simulation.on("tick", () => {
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link
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.attr("x1", d => d.source.x)
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.attr("y1", d => d.source.y)
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.attr("x2", d => d.target.x)
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.attr("y2", d => d.target.y);
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node
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.attr("cx", d => d.x)
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.attr("cy", d => d.y);
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labels
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.attr("x", d => d.x)
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.attr("y", d => d.y);
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});
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function dragstarted(event, d) {
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if (!event.active) simulation.alphaTarget(0.3).restart();
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d.fx = d.x;
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d.fy = d.y;
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}
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function dragged(event, d) {
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d.fx = event.x;
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d.fy = event.y;
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}
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function dragended(event, d) {
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if (!event.active) simulation.alphaTarget(0);
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d.fx = null;
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d.fy = null;
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}
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});
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