A few more ux refinements, and added the ability to hide captions

fourDShape.js

@@ -2,7 +2,7 @@ import * as THREE from 'three';
 
 
 const HYPERPLANE = 2.0;
-const W_FORESHORTENING = 0.4;
+const W_FORESHORTENING = 0.04;
 
 class FourDShape extends THREE.Group {
 
@@ -50,7 +50,10 @@ class FourDShape extends THREE.Group {
 		const length = n1.v3.distanceTo(n2.v3);
 		const centre = new THREE.Vector3();
 		centre.lerpVectors(n1.v3, n2.v3, 0.5);
-		const geometry = new THREE.CylinderGeometry(this.link_scale * s2, this.link_scale * s1, 1);
+		const geometry = new THREE.CylinderGeometry(
+			this.link_scale * s2, this.link_scale * s1, 1,
+			16, 1, true
+		);
 		const cyl = new THREE.Mesh(geometry, material);
 		const edge = new THREE.Group();
 		edge.add(cyl);
@@ -70,36 +73,17 @@ class FourDShape extends THREE.Group {
 		const length = n1.v3.distanceTo(n2.v3);
 		const centre = new THREE.Vector3();
 		centre.lerpVectors(n1.v3, n2.v3, 0.5);
-		// is this really the only way to do this?
+		// take the average of the ends as the thickness - as a workaround,
-		//const geometry = new THREE.CylinderGeometry(this.link_scale * s2, this.link_scale * s1, 1);
+		// because I haven't worked out how to reshape tapered links without
-		//link.object.children[0].geometry.dispose();
+		// having to reassign a new geometry to every link
-		this.forshortenLink(link.object.children[0].geometry, this.link_scale * s2, this.link_scale * s1);
+		const link_mean = this.link_scale * (s1 + s2) * 0.5;		
-		//const link_hack = this.link_scale * (s1 + s2) * 0.5;		
+		link.object.scale.copy(new THREE.Vector3(link_mean, link_mean, length));
-		link.object.scale.copy(new THREE.Vector3(1, 1, length));
 		link.object.position.copy(centre);
 		link.object.lookAt(n2.v3);
 		link.object.children[0].rotation.x = Math.PI / 2.0;
-		// link.object.children[0].geometry.needsUpdate = true;
-		// link.object.children[0].geometry.computeVertexNormals();
 		link.object.visible = (!links_show || link.label in links_show); 
 	}
 
-	forshortenLink(geometry, top, bottom) {
-		const count = geometry.attributes.position.count;
-		for( let i = 0; i < count; i++ ) {
-			const x = geometry.attributes.position.getX(i);
-			const y = geometry.attributes.position.getY(i);
-			const z = geometry.attributes.position.getZ(i);
-			if( z == 0 ) {
-				geometry.attributes.position.setX(i, x * top);
-				geometry.attributes.position.setY(i, y * top);
-			} else {
-				geometry.attributes.position.setX(i, x * bottom);
-				geometry.attributes.position.setY(i, y * bottom);
-			}
-		}
-	}
-
 
 	setFaceGeometry(face, geometry) {
 		const values = [];

gui.js

@@ -2,10 +2,11 @@ import { GUI } from 'lil-gui';
 
 
 const DEFAULTS = {
-	thickness: 0.02,
+	nodesize: 0.25,
-	nodesize: 0.02,
+	nodeopacity: 1,
-	linkopacity: 0.5,
+	linksize: 0.2,
-	link2opacity: 0.5,
+	linkopacity: 0.75,
+	link2opacity: 0.75,
 	shape: '120-cell',
 	option: 'none',
 	visibility: 5,
@@ -18,6 +19,8 @@ const DEFAULTS = {
 	xRotate: 'YW',
 	yRotate: 'XW',
 	dtheta: 0,
+	damping: false,
+	captions: true,
 	dpsi: 0,
 }
 
@@ -25,7 +28,7 @@ const DEFAULTS = {
 
 class FourDGUI {
 
-	constructor(shapes, changeShape, setColor, setBackground, setLinkOpacity, setVisibility) {
+	constructor(shapes, changeShape, setColor, setBackground, setNodeOpacity,setLinkOpacity, setVisibility, showDocs) {
 		this.gui = new GUI();
 		const SHAPE_NAMES = shapes.map((s) => s.name);
 
@@ -36,10 +39,11 @@ class FourDGUI {
 			option: this.link['option'],
 			inscribed: this.link['inscribed'],
 			inscribe_all: this.link['inscribe_all'],
-			thickness: this.link['thickness'],
+			linksize: this.link['linksize'],
 			linkopacity: this.link['linkopacity'],
 			link2opacity: this.link['linkopacity'],
 			nodesize: this.link['nodesize'],
+			nodeopacity: this.link['nodeopacity'],
 			depth: this.link['depth'],
 			color: this.link['color'],
 			background: this.link['background'],
@@ -48,6 +52,7 @@ class FourDGUI {
 			xRotate: this.link['xRotate'],
 			yRotate: this.link['yRotate'],
 			damping: false,
+			captions: true,
 			dtheta: this.link['dtheta'],
 			dpsi: this.link['dpsi'],
 			"copy link": function () { guiObj.copyUrl() }
@@ -67,18 +72,20 @@ class FourDGUI {
 		});
 		this.gui.add(this.params, 'hyperplane', 0.5, 1 / 0.8);
 		this.gui.add(this.params, 'zoom', 0.1, 2.0);
-		this.gui.add(this.params, 'thickness', 0, 0.1);
+		this.gui.add(this.params, 'nodesize', 0, 1);
+		this.gui.add(this.params, 'nodeopacity', 0, 1).onChange(setNodeOpacity);
+		this.gui.add(this.params, 'linksize', 0, 1);
 		this.gui.add(this.params, 'linkopacity', 0, 1).onChange(
 			(v) => setLinkOpacity(v, true)
 		);
 		this.gui.add(this.params, 'link2opacity', 0, 1).onChange(
 			(v) => setLinkOpacity(v, false)
 		);
-		this.gui.add(this.params, 'nodesize', 0, 0.1);
 		this.gui.addColor(this.params, 'color').onChange(setColor);
 		this.gui.addColor(this.params, 'background').onChange(setBackground);
 		this.gui.add(this.params, 'xRotate', [ 'YW', 'YZ', 'ZW' ]);
 		this.gui.add(this.params, 'yRotate', [ 'XZ', 'XY', 'XW' ]);
+		this.gui.add(this.params, 'captions').onChange(showDocs);
 		this.gui.add(this.params, 'damping');
 		this.gui.add(this.params, 'copy link');
 
@@ -134,10 +141,11 @@ class FourDGUI {
 		}
 		this.link['hyperplane'] = this.numParam('hyperplane', parseFloat);
 		this.link['zoom'] = this.numParam('zoom', parseFloat);
-		this.link['thickness'] = this.numParam('thickness', parseFloat);
+		this.link['linksize'] = this.numParam('linksize', parseFloat);
 		this.link['linkopacity'] = this.numParam('linkopacity', parseFloat);
 		this.link['link2opacity'] = this.numParam('link2opacity', parseFloat);
 		this.link['nodesize'] = this.numParam('nodesize', parseFloat);
+		this.link['nodeopacity'] = this.numParam('nodeopacity', parseFloat);
 		this.link['color'] = this.numParam('color', (s) => guiObj.stringToHex(s));
 		this.link['background'] = this.numParam('background', (s) => guiObj.stringToHex(s));
 		this.link['dpsi'] = this.numParam('dpsi', parseFloat);
@@ -151,10 +159,11 @@ class FourDGUI {
 		url.searchParams.append("option", this.params.option);
 		url.searchParams.append("inscribed", this.params.inscribed ? 'y': 'n');
 		url.searchParams.append("inscribe_all", this.params.inscribe_all ? 'y': 'n');
-		url.searchParams.append("thickness", this.params.thickness.toString());
+		url.searchParams.append("linksize", this.params.linksize.toString());
 		url.searchParams.append("nodesize", this.params.nodesize.toString());
-		url.searchParams.append("linkopacity", this.params.thickness.toString());
+		url.searchParams.append("nodeopacity", this.params.nodesize.toString());
-		url.searchParams.append("link2opacity", this.params.nodesize.toString());
+		url.searchParams.append("linkopacity", this.params.nodeopacity.toString());
+		url.searchParams.append("link2opacity", this.params.link2opacity.toString());
 		url.searchParams.append("color", this.hexToString(this.params.color));
 		url.searchParams.append("background", this.hexToString(this.params.background));
 		url.searchParams.append("hyperplane", this.params.hyperplane.toString());

main.js

@@ -47,11 +47,19 @@ material.opacity = 0.5;
 const node_ms = node_colours.map((c) => new THREE.MeshStandardMaterial({color: c}));
 const link_ms = node_colours.map((c) => new THREE.MeshStandardMaterial({color: c}));
 
+node_ms.map((m) => {
+	m.transparent =  true;
+	m.opacity = 1.0;
+	}
+);
+
 link_ms.map((m) => {
 	m.transparent =  true;
 	m.opacity = 0.5;
 	}
-)
+);
+
+
 
 const face_ms = [
 	new THREE.MeshLambertMaterial( { color: 0x44ff44 } )
@@ -95,6 +103,16 @@ function displayDocs(name) {
 	}
 }
 
+function showDocs(visible) {
+	console.log(`showDocs ${visible}`);
+	const docdiv = document.getElementById("description");
+	if( visible ) {
+		docdiv.style.display = '';
+	} else {
+		docdiv.style.display = 'none';
+	}
+}
+
 // initialise gui and read params from URL
 
 // callbacks to do things which are triggered by controls: reset the shape,
@@ -125,6 +143,11 @@ function setLinkOpacity(o, primary) {
 	}
 }
 
+function setNodeOpacity(o) {
+	node_ms.map((nm) => nm.opacity = o);
+}
+
+
 let gui; 
 
 
@@ -149,8 +172,10 @@ gui = new FourDGUI(
 	changeShape,
 	setColors,
 	setBackground,
+	setNodeOpacity,
 	setLinkOpacity,
-	setVisibility
+	setVisibility,
+	showDocs
 );
 
 // these are here to pick up colour settings from the URL params
@@ -216,8 +241,8 @@ function animate() {
 	shape.hyperplane = 1 / gui.params.hyperplane;
 	camera.position.set(0, 0, gui.params.zoom * CAMERA_K * gui.params.hyperplane);
 
-	shape.link_scale = gui.params.thickness;
 	shape.node_scale = gui.params.nodesize;
+	shape.link_scale = gui.params.linksize * gui.params.nodesize * 0.5;
 	shape.render3(rotations, node_show, link_show);