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/**
* No.6092 site for Charles Stankievech
* - load db.json
* - map the nodes to a graph
* - click the nodes to open them
* - some of the nodes are images, others are 3D
*/
import ForceGraph3D from "3d-force-graph";
import SpriteText from "three-spritetext";
import { union } from "./utils/set_utils.js";
import stars from "./utils/stars.js";
const colors = [
"rgba(111,53,158,1.0)",
"rgba(220,188,253,1.0)",
"rgba(30,177,237,1.0)",
"rgba(148,206,88,1.0)",
"rgba(252,42,28,1.0)",
"rgba(255,253,56,1.0)",
"rgba(43,253,183,1.0)",
"rgba(252,76,252,1.0)",
"rgba(205,254,170,1.0)",
"rgba(254,205,195,1.0)",
"rgba(199,227,254,1.0)",
"rgba(253,191,45,1.0)",
"rgba(253,191,45,1.0)",
];
async function main() {
const db = await loadDB();
const groups = {};
const linkable = {};
const data = { nodes: [], links: [] };
console.log(db);
/**
* load nodes and links
*/
db.page.forEach((item, index) => {
const node = {
title: item.title,
id: index,
groups: [],
};
data.nodes.push(node);
for (let tagIndex = 0; tagIndex < 8; tagIndex += 1) {
const group = item["tag_" + tagIndex];
if (!group) continue;
group -= 1;
node.groups.push(group);
if (group in groups) {
groups[group].push(index);
} else {
groups[group] = [index];
}
if (group in linkable) {
data.links.push({
// source: choice(linkable[group]),
source: linkable[group][0],
target: index,
});
// option: don't link to the root node more than once
// if (window.location.hash === "#dense" && linkable[group][0]) {
if (linkable[group][0]) {
linkable[group].push(index);
} else {
linkable[group] = [index];
}
} else {
linkable[group] = [index];
}
}
});
/**
* find common links
*/
data.links.forEach((link) => {
const a = data.nodes[link.source];
const b = data.nodes[link.target];
!a.links && (a.links = []);
!b.links && (b.links = []);
a.links.push(link);
b.links.push(link);
});
const highlightNodes = new Set();
const highlightLinks = new Set();
let selectedNode = null;
/** build group */
let graph = ForceGraph3D();
graph(document.querySelector("#graph"))
.graphData(data)
.nodeLabel((node) => node.title)
.nodeThreeObject((node) => {
const sprite = new SpriteText(
node.title.split(/[ :]+/).slice(0, 3).join(" ")
);
sprite.material.depthWrite = false; // make sprite background transparent
sprite.color = colors[node.groups[0]]; // node.groups.length - 1]];
sprite.textHeight = 4;
return sprite;
})
// .nodeColor((node) =>
// highlightNodes.has(node.id)
// ? node === selectedNode
// ? colors[commonGroups(selectedNode, node)[0]]
// : colors[commonGroups(selectedNode, node)[0]].replace("1.0", "0.8")
// : colors[commonGroups(selectedNode, node)[0]].replace("1.0", "0.6")
// )
.linkWidth((link) => (highlightLinks.has(link) ? 4 : 1))
.onNodeClick((node) => {
// no state change
if (!node && !highlightNodes.size) return;
selectedNode = selectedNode === node ? null : node;
highlightNodes.clear();
highlightLinks.clear();
if (node) {
node.groups.forEach((group) =>
groups[group].forEach((neighbor) => highlightNodes.add(neighbor))
);
node.links.forEach((link) => highlightLinks.add(link));
}
updateHighlight();
});
function updateHighlight() {
graph.nodeColor(graph.nodeColor()).linkWidth(graph.linkWidth());
}
graph.d3Force("charge").strength(-150);
// camera orbit
const distance = 250;
let angle = 0;
graph.cameraPosition({
x: distance * Math.sin(angle),
z: distance * Math.cos(angle),
});
stars();
}
const randint = (limit) => Math.floor(Math.random() * limit);
const choice = (list) => list[randint(list.length)];
const commonGroups = (a, b) => union(a.groups, b.groups);
async function loadDB() {
const request = await fetch("/assets/db.json");
return await request.json();
}
main();
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