bombinans
/
fourdjs
1
1
Fork 0
Code Issues 11 Pull Requests Packages Projects Releases Wiki Activity

refactored shapes out

feature-big-polytopes
Mike Lynch 2023-07-25 09:05:06 +10:00
parent 399a29c30e
commit 63c3eb1dfe
3 changed files with 104 additions and 97 deletions
Show Stats Download Patch File Download Diff File Expand all files Collapse all files

100
fourDShape.js 100644
View File

@ -0,0 +1,100 @@
import * as THREE from 'three';
const HYPERPLANE = 2;
const NODE_SIZE = 0.08;
const LINK_SIZE = 0.02;
function fourDtoV3(x, y, z, w, rotations) {
const v4 = new THREE.Vector4(x, y, z, w);
for ( const m4 of rotations ) {
v4.applyMatrix4(m4);
}
const k = HYPERPLANE / (HYPERPLANE + v4.w);
return new THREE.Vector3(v4.x * k, v4.y * k, v4.z * k);
}
class FourDShape extends THREE.Group {
constructor(node_ms, link_m, structure) {
super();
this.node_ms = node_ms;
this.link_m = link_m;
this.nodes4 = structure.nodes;
this.nodes3 = {};
this.links = structure.links;
this.initShapes();
}
makeNode(material, v3) {
const geometry = new THREE.SphereGeometry(NODE_SIZE);
const sphere = new THREE.Mesh(geometry, material);
sphere.position.copy(v3);
this.add(sphere);
return sphere;
}
makeLink(link) {
const n1 = this.nodes3[link.source].v3;
const n2 = this.nodes3[link.target].v3;
const length = n1.distanceTo(n2);
const centre = new THREE.Vector3();
centre.lerpVectors(n1, n2, 0.5);
const geometry = new THREE.CylinderGeometry(LINK_SIZE, LINK_SIZE, 1);
const cyl = new THREE.Mesh(geometry, this.link_m);
const edge = new THREE.Group();
edge.add(cyl);
edge.position.copy(centre);
edge.scale.copy(new THREE.Vector3(1, 1, length));
edge.lookAt(n2);
cyl.rotation.x = Math.PI / 2.0;
this.add(edge);
return edge;
}
updateLink(link) {
const n1 = this.nodes3[link.source].v3;
const n2 = this.nodes3[link.target].v3;
const length = n1.distanceTo(n2);
const centre = new THREE.Vector3();
centre.lerpVectors(n1, n2, 0.5);
link.object.scale.copy(new THREE.Vector3(1, 1, length));
link.object.position.copy(centre);
link.object.lookAt(n2);
link.object.children[0].rotation.x = Math.PI / 2.0;
}
initShapes() {
for( const n of this.nodes4 ) {
const v3 = fourDtoV3(n.x, n.y, n.z, n.w, []);
const material = this.node_ms[n.label];
this.nodes3[n.id] = {
v3: v3,
object: this.makeNode(material, v3)
};
}
for( const l of this.links ) {
l.object = this.makeLink(l);
}
}
render3(rotations) {
for( const n of this.nodes4 ) {
const v3 = fourDtoV3(n.x, n.y, n.z, n.w, rotations);
this.nodes3[n.id].v3 = v3;
this.nodes3[n.id].object.position.copy(v3);
// could do scaling here
}
for( const l of this.links ) {
this.updateLink(l);
}
}
}
export { FourDShape };

101
main.js
View File

@ -1,14 +1,12 @@
import * as THREE from 'three'; import * as THREE from 'three';
import * as SHAPES from './shapes.js'; import * as POLYTOPES from './polytopes.js';
import { FourDShape } from './fourDShape.js';
const NODE_SIZE = 0.08;
const LINK_SIZE = 0.02;
const NODE_OPACITY = 1.0; const NODE_OPACITY = 1.0;
const LINK_OPACITY = 0.7; const LINK_OPACITY = 0.7;
const HYPERPLANE = 2;
@ -85,98 +83,6 @@ function rotXY(theta) {
} }
// putting rotation here first - it's a matrix4
function fourDtoV3(x, y, z, w, rotations) {
const v4 = new THREE.Vector4(x, y, z, w);
for ( const m4 of rotations ) {
v4.applyMatrix4(m4);
}
const k = HYPERPLANE / (HYPERPLANE + v4.w);
return new THREE.Vector3(v4.x * k, v4.y * k, v4.z * k);
}
class FourDShape extends THREE.Group {
constructor(node_ms, link_m, structure) {
super();
this.node_ms = node_ms;
this.link_m = link_m;
this.nodes4 = structure.nodes;
this.nodes3 = {};
this.links = structure.links;
this.initShapes();
}
makeNode(material, v3) {
const geometry = new THREE.SphereGeometry(NODE_SIZE);
const sphere = new THREE.Mesh(geometry, material);
sphere.position.copy(v3);
this.add(sphere);
return sphere;
}
makeLink(link) {
const n1 = this.nodes3[link.source].v3;
const n2 = this.nodes3[link.target].v3;
const length = n1.distanceTo(n2);
const centre = new THREE.Vector3();
centre.lerpVectors(n1, n2, 0.5);
const geometry = new THREE.CylinderGeometry(LINK_SIZE, LINK_SIZE, 1);
const cyl = new THREE.Mesh(geometry, this.link_m);
const edge = new THREE.Group();
edge.add(cyl);
edge.position.copy(centre);
edge.scale.copy(new THREE.Vector3(1, 1, length));
edge.lookAt(n2);
cyl.rotation.x = Math.PI / 2.0;
this.add(edge);
return edge;
}
updateLink(link) {
const n1 = this.nodes3[link.source].v3;
const n2 = this.nodes3[link.target].v3;
const length = n1.distanceTo(n2);
const centre = new THREE.Vector3();
centre.lerpVectors(n1, n2, 0.5);
link.object.scale.copy(new THREE.Vector3(1, 1, length));
link.object.position.copy(centre);
link.object.lookAt(n2);
link.object.children[0].rotation.x = Math.PI / 2.0;
}
initShapes() {
for( const n of this.nodes4 ) {
const v3 = fourDtoV3(n.x, n.y, n.z, n.w, []);
const material = this.node_ms[n.label];
this.nodes3[n.id] = {
v3: v3,
object: this.makeNode(material, v3)
};
}
for( const l of this.links ) {
l.object = this.makeLink(l);
}
}
render3(rotations) {
for( const n of this.nodes4 ) {
const v3 = fourDtoV3(n.x, n.y, n.z, n.w, rotations);
this.nodes3[n.id].v3 = v3;
this.nodes3[n.id].object.position.copy(v3);
// could do scaling here
}
for( const l of this.links ) {
this.updateLink(l);
}
}
}
@ -195,11 +101,12 @@ scene.add(amblight);
scene.background = new THREE.Color(0xdddddd); scene.background = new THREE.Color(0xdddddd);
const renderer = new THREE.WebGLRenderer({antialias: true}); const renderer = new THREE.WebGLRenderer({antialias: true});
renderer.setSize( window.innerWidth, window.innerHeight ); renderer.setSize( window.innerWidth, window.innerHeight );
document.body.appendChild( renderer.domElement ); document.body.appendChild( renderer.domElement );
const struct = SHAPES.cell24(); const struct = POLYTOPES.cell24();
// TODO = automate going from struct labels to colours, this now only // TODO = automate going from struct labels to colours, this now only
// works with the 24-cell // works with the 24-cell

0
shapes.js → polytopes.js
View File