Changed import to require in permute_testbed
Mike Lynch
parent
4ba8b0617c
commit
74cea5750d
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@ -4,6 +4,8 @@
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// Based on https://www.qfbox.info/epermute
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const THREE =require('three');
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function pandita(a) {
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const n = a.length;
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for( let k = n - 2; k >= 0; k-- ) {
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@ -274,7 +276,7 @@ function make_120cell_vertices() {
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coordinates([2, 1, phi, phiinv], 0, true),
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].flat();
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index_nodes(nodes);
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scale_nodes(nodes, 0.5);
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// scale_nodes(nodes, 0.5);
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return nodes;
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}
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@ -311,68 +313,41 @@ function make_600cell_vertices() {
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}
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function find_peers(nodesid, seen, n, d) {
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function find_by_chord(nodesid, n, d) {
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const EPSILON = 0.02;
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console.log(`find_peers ${n} (already seen ${seen})`)
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return Object.keys(nodesid).filter((n1) => {
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if( seen.includes(n1) ) {
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return false;
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}
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const d2 = dist2(nodesid[n1], nodesid[n]);
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return Math.abs(d2 - d ** 2) < EPSILON;
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});
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}
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function peer(n1, n2, d) {
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function has_chord(n1, n2, d) {
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const d2 = dist2(n1, n2);
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const EPSILON = 0.01;
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return Math.abs(d2 - d ** 2) < EPSILON;
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}
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function partition_nodes_by_distance(nodes, d) {
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const groups = [];
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const nodesid = {};
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const EPSILON = 0.005;
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for( const node of nodes ) {
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nodesid[node.id] = node;
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function find_all_chords(nodes) {
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const chords = {};
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for( let i = 0; i < nodes.length - 1; i++ ) {
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for( let j = i + 1; j < nodes.length; j++ ) {
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const n1 = nodes[i];
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const n2 = nodes[j];
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const chord = Math.sqrt(dist2(n1, n2)).toFixed(5);
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if( !(chord in chords) ) {
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chords[chord] = [];
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}
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let tick = 0;
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while( Object.keys(nodesid).length > 0 ) {
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const start = Object.keys(nodesid)[0];
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console.log(`Start node = ${start}`);
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const group = [ start ];
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for( const n2 of Object.keys(nodesid) ) {
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console.log(`group [ ${group} ] / n2 ${n2}`);
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const n3 = [];
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if( !group.includes(n2) ) {
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console.log(`group: ${group}`);
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for( const g of group ) {
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if( peer(nodesid[g], nodesid[n2], d) ) {
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console.log(`Match`);
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//n3.push(n2);
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chords[chord].push([n1, n2]);
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}
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}
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}
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console.log(`n3 = ${n3}`);
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group.push(...n3);
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}
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process.exit();
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for( const g of group ) {
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delete nodesid[g];
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}
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groups.push(group);
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console.log(`Added group ${group}`);
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}
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return groups;
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return chords;
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}
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const cell600 = () => {
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const nodes = make_600cell_vertices();
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const links = auto_detect_edges(nodes, 12);
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@ -387,6 +362,68 @@ const cell600 = () => {
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}
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const nodes = make_600cell_vertices();
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function find_chords(chords, n) {
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return chords.filter((c) => c[0].id === n.id || c[1].id === n.id);
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}
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function find_neighbours(chords, n) {
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const c = find_chords(chords, n);
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return c.map((c) => c[0].id === n.id ? c[1] : c[0])
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}
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function label_subgraph(chords, label, n) {
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const neighbours = find_neighbours(chords, n);
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for( const n1 of neighbours ) {
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if( n1.label === 0 ) {
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n1.label = label;
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console.log(`Added ${n1.id} to group ${label}`);
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label_subgraph(chords, label, n1);
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} else {
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if( n1.label !== label ) {
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console.log(`node ${n1.id} is already in group ${n1.label}`);
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}
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}
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}
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}
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function vector_angle(n1, n2, n3) {
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const v1 = new THREE.Vector4(n1.x, n1.y, n1.z, n1.w);
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const v2 = new THREE.Vector4(n2.x, n2.y, n2.z, n2.w);
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const v3 = new THREE.Vector4(n3.x, n3.y, n3.z, n3.w);
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v2.sub(v1);
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v3.sub(v1);
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const dp = v2.dot(v3);
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return Math.acos(dp / ( v2.length() * v3.length()));
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}
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function neighbour_angles(chords, n) {
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const ns = find_neighbours(chords, n);
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const angles = {};
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for( let i = 0; i < ns.length - 1; i++ ) {
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for( let j = i + 1; j < ns.length; j++ ) {
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const n2 = ns[i];
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const n3 = ns[j];
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const a = THREE.MathUtils.radToDeg(vector_angle(n, n2, n3));
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const af = (a).toFixed(3);
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console.log(`${n2.id} ${n3.id} ${af}`)
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if( ! (af in angles) ) {
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angles[af] = [];
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}
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angles[af].push([n2.id, n3.id]);
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}
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}
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return angles;
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}
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const nodes = make_120cell_vertices();
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const chords = find_all_chords(nodes)
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const chord3 = chords["1.74806"];
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