v1.2 - 18/1/2026
+ +Added a second visualisation of the 120-cell's 5-cells without the 120-cell links and with more colours added so you can get a sense of the individual 5-cells.
+ +v1.1 - 1/1/2026
+ +The 120-cell now includes a visualisation of its inscribed 5-cells, which honestly +looks like less of a mess than I expected it to.
+v1.0 - 16/11/2025
It's been two years since @@ -51,7 +60,8 @@ document.body.appendChild( renderer.domElement ); // set up colours and materials for gui callbacks scene.background = new THREE.Color(DEFAULTS.background); -const node_colours = get_colours(DEFAULTS.color); +const node_colours = get_colours(DEFAULTS.colour); + const node_ms = node_colours.map((c) => new THREE.MeshStandardMaterial({color: c})); const link_ms = node_colours.map((c) => new THREE.MeshStandardMaterial({color: c})); @@ -68,7 +78,6 @@ link_ms.map((m) => { } ); -console.log("link_ms", link_ms); const face_ms = [ @@ -146,7 +155,7 @@ relnotes.addEventListener('click', releaseNotes); // callbacks to do things which are triggered by controls: reset the shape, // change the colors. Otherwise we just read stuff from gui.params. -function setColors(c) { +function setColours(c) { const nc = get_colours(c); for( let i = 0; i < node_ms.length; i++ ) { node_ms[i].color = new THREE.Color(nc[i]); @@ -154,7 +163,7 @@ function setColors(c) { } if( shape ) { // taperedLink.set_color updates according to the link index - shape.links.map((l) => l.object.set_color(nc)); + shape.links.map((l) => l.object.set_colour(nc)); } } @@ -191,8 +200,6 @@ function changeShape() { } function setVisibility(option_name) { - console.log("setVisibility", option_name); - console.log(structure.options); const option = structure.options.filter((o) => o.name === option_name); if( option.length ) { node_show = option[0].nodes; @@ -207,7 +214,7 @@ gui = new FourDGUI( { shapes: STRUCTURES, changeShape: changeShape, - setColors: setColors, + setColours: setColours, setBackground: setBackground, setNodeOpacity: setNodeOpacity, setLinkOpacity: setLinkOpacity, @@ -217,7 +224,7 @@ gui = new FourDGUI( ); // these are here to pick up colour settings from the URL params -setColors(gui.params.color); +setColours(gui.params.colour); setBackground(gui.params.background); const dragK = 0.005; diff --git a/polytopes.js b/polytopes.js index e121fd4..958d3c4 100644 --- a/polytopes.js +++ b/polytopes.js @@ -475,7 +475,7 @@ export const cell120_inscribed = () => { export const cell120_inscribed_cell5 = () => { const nodes = make_120cell_vertices(); - const links = auto_detect_edges(nodes, 4); + const links = []; for( const cstr in CELLINDEX.INDEX120 ) { label_nodes(nodes, CELLINDEX.INDEX120[cstr], Number(cstr)); @@ -483,17 +483,25 @@ export const cell120_inscribed_cell5 = () => { links.map((l) => l.label = 0); + const CELL5S = CELLINDEX.CELL120_CELL5.cell5s; + for( const c5 in CELL5S ) { + const nodes5 = nodes.filter((n) => CELL5S[c5].includes(n.id)); + const links5 = auto_detect_edges(nodes5, 5); + links5.map((l) => l.label = Number(c5)); + links.push(...links5); + } + const show_links = Array.from({ length: 128 }, (_, i) => i); return { - name: '120-cell-5-cell', + name: '120 5-cells', nodes: nodes, links: links, options: [ - { name: "5-cells", links: [ 0, 1, 2, 3, 4, 5, 6, 7, 8 ] }, - ], - description: `The 120-cell with one of its 5-cells.`, + { name: "none", links: show_links}, + ], + description: `The 120 5-cells from the 120-cell, without the latter's links. This colouring is pretty arbitrary, being based on the algorithm which partitioned the nodes: a later version will have something that's based on the symmetries of the 600-cells which each of the 5-cells has its nodes in.`, } } diff --git a/taperedLink.js b/taperedLink.js index 1e88975..737e5fb 100644 --- a/taperedLink.js +++ b/taperedLink.js @@ -4,11 +4,11 @@ const EPSILON = 0.001; class TaperedLink extends THREE.Group { - constructor(baseMaterial, color_i, n1, n2, r1, r2) { + constructor(baseMaterial, colour_i, n1, n2, r1, r2) { super(); const geometry = new THREE.ConeGeometry( 1, 1, 16, true ); const cplane = new THREE.Plane(new THREE.Vector3(0, -1, 0), 0.5); - this.color_i = color_i; + this.colour_i = colour_i; this.material = baseMaterial.clone(); this.material.clippingPlanes = [ cplane ]; this.object = new THREE.Mesh( geometry, this.material ); @@ -53,11 +53,12 @@ class TaperedLink extends THREE.Group { clipnorm, napex ); - + } - set_color(colors) { - this.material.color = new THREE.Color(colors[this.color_i]); + set_colour(colours) { + console.log(`taperedLink.set_colour {this.colour_i} {colours[this.colour_i]}`); + this.material.color = new THREE.Color(colours[this.colour_i]); } }