Producing open source analytics and vis @Kitware.
Published
Edited
Jul 22, 2021
2 forks
5 stars
nodelink(links)
treeifyLinks = (links) => {
const hasParent = {};
const result = [];
links.forEach(link => {
if (!hasParent[link.source]) {
result.push(link);
hasParent[link.source] = true;
}
});
return result;
}
nodelink(treeifyLinks(links))
activeNodeIds = ['tidal creek', 'river', 'hypoxic lake']
pruneIrrelevantNodes = (links, activeNodeIds) => {
const g = new Graph(links);
activeNodeIds.forEach(nodeId => {
let currentNode = g.nodeMap[nodeId];
while (currentNode) {
currentNode.relevant = true;
currentNode = g.nodeMap[currentNode.out[0]];
}
});
Object.values(g.nodeMap).forEach(node => {
if (!node.relevant) {
g.removeNode(node);
}
});
return g.toLinks();
}
nodelink(pruneIrrelevantNodes(treeifyLinks(links), activeNodeIds))
shortenPaths = (links, activeNodeIds) => {
const g = new Graph(links);
let changed = true;
while (changed) {
changed = false;
let nodes = Object.values(g.nodeMap);
for (let node of nodes) {
if (node.in.length === 1 && node.out.length === 1) {
const nodeIn = g.nodeMap[node.in[0]];
const nodeOut = g.nodeMap[node.out[0]];
if (!activeNodeIds.includes(node.id)) {
g.removeNode(node);
g.addLink(nodeIn, nodeOut);
delete g.nodeMap[node.id];
changed = true;
}
}
}
}
return g.toLinks();
}
simplifyOntology = (links, activeNodesIds) => {
return shortenPaths(pruneIrrelevantNodes(treeifyLinks(links), activeNodeIds), activeNodeIds);
}
nodelink(simplifyOntology(links, activeNodeIds))
height = 500
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