133 lines
3.1 KiB
JavaScript
133 lines
3.1 KiB
JavaScript
import * as THREE from 'three';
|
|
|
|
|
|
|
|
import * as POLYTOPES from './polytopes.js';
|
|
import { rotfn } from './rotation.js';
|
|
import { FourDGUI } from './gui.js';
|
|
import { FourDShape } from './fourDShape.js';
|
|
|
|
// scene, lights and camera
|
|
|
|
const scene = new THREE.Scene();
|
|
const camera = new THREE.PerspectiveCamera( 75, window.innerWidth / window.innerHeight, 0.1, 1000 );
|
|
const light = new THREE.PointLight(0xffffff, 2);
|
|
light.position.set(10, 10, 10);
|
|
scene.add(light);
|
|
const light2 = new THREE.PointLight(0xffffff, 2);
|
|
light2.position.set(-10, 5, 10);
|
|
scene.add(light);
|
|
const amblight = new THREE.AmbientLight(0xffffff, 0.5);
|
|
scene.add(amblight);
|
|
|
|
camera.position.z = 4;
|
|
|
|
const renderer = new THREE.WebGLRenderer({antialias: true});
|
|
renderer.setSize( window.innerWidth, window.innerHeight );
|
|
document.body.appendChild( renderer.domElement );
|
|
|
|
// set up colours and materials for gui callbacks
|
|
|
|
scene.background = new THREE.Color(0x000000);
|
|
const material = new THREE.MeshStandardMaterial({ color: 0xff0000 });
|
|
|
|
const node_ms = [ material ];
|
|
|
|
const link_ms = [ material ];
|
|
|
|
const STRUCTURES = {
|
|
'5-cell': POLYTOPES.cell5(),
|
|
'16-cell': POLYTOPES.cell16(),
|
|
'tesseract': POLYTOPES.tesseract(),
|
|
'24-cell': POLYTOPES.cell24(),
|
|
'120-cell': POLYTOPES.cell120(),
|
|
'600-cell': POLYTOPES.cell600()
|
|
};
|
|
|
|
let shape = false;
|
|
|
|
function createShape(name) {
|
|
if( shape ) {
|
|
scene.remove(shape);
|
|
}
|
|
shape = new FourDShape(node_ms, link_ms, STRUCTURES[name]);
|
|
scene.add(shape);
|
|
|
|
}
|
|
|
|
// initialise gui and read params from URL
|
|
|
|
// callbacks to do things which are triggered by controls: reset the shape,
|
|
// change the colors. Otherwise we just read stuff from gui.params.
|
|
|
|
const gui = new FourDGUI(
|
|
createShape,
|
|
(c) => { material.color = new THREE.Color(c) },
|
|
(c) => { scene.background = new THREE.Color(c) },
|
|
);
|
|
|
|
|
|
|
|
const dragK = 0.005;
|
|
const damping = 0.99;
|
|
|
|
let theta = 0;
|
|
let psi = 0;
|
|
let theta0 = 0;
|
|
let psi0 = 0;
|
|
let dragx0 = 0;
|
|
let dragy0 = 0;
|
|
let dragging = false;
|
|
|
|
|
|
renderer.domElement.addEventListener("pointerdown", (event) => {
|
|
if( event.buttons === 1 ) {
|
|
theta0 = theta;
|
|
psi0 = psi;
|
|
dragx0 = event.clientX;
|
|
dragy0 = event.clientY;
|
|
dragging = true;
|
|
}
|
|
})
|
|
|
|
renderer.domElement.addEventListener("pointermove", (event) => {
|
|
if( event.buttons === 1 ) {
|
|
const theta1 = theta0 + (event.clientX - dragx0) * dragK;
|
|
const psi1 = psi0 + (event.clientY - dragy0) * dragK;
|
|
gui.params.dtheta = theta1 - theta;
|
|
gui.params.dpsi = psi1 - psi;
|
|
theta = theta1;
|
|
psi = psi1;
|
|
}
|
|
})
|
|
|
|
renderer.domElement.addEventListener("pointerup", (event) => {
|
|
dragging = false;
|
|
})
|
|
|
|
createShape(gui.params.shape);
|
|
|
|
function animate() {
|
|
requestAnimationFrame( animate );
|
|
|
|
if( ! dragging ) {
|
|
theta += gui.params.dtheta;
|
|
psi += gui.params.dpsi;
|
|
if( gui.params.damping ) {
|
|
gui.params.dtheta = gui.params.dtheta * damping;
|
|
gui.params.dpsi = gui.params.dpsi * damping;
|
|
}
|
|
}
|
|
|
|
const rotations = [
|
|
rotfn[gui.params.xRotate](theta),
|
|
rotfn[gui.params.yRotate](psi)
|
|
];
|
|
shape.hyperplane = gui.params.hyperplane;
|
|
shape.geom_scale = gui.params.thickness;
|
|
shape.render3(rotations);
|
|
|
|
renderer.render( scene, camera );
|
|
}
|
|
animate();
|