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main.html
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<!--
Based on code by Matthias Müller - Ten Minute Physics, https://www.youtube.com/channel/UCTG_vrRdKYfrpqCv_WV4eyA
-->
<!DOCTYPE html>
<meta name="viewport" content="width=device-width, initial-scale=1.0">
<html lang="en">
<head>
<title>Three.js simulation</title>
<style>
body {
font-family: verdana;
font-size: 15px;
}
.button {
background-color: #606060;
border: none;
color: white;
padding: 10px 15px;
font-size: 12px;
margin: 4px 2px;
cursor: pointer;
}
</style>
</head>
<body>
<!--
<h1>Three.js simulation</h1>
<h3>Hold Ctrl to move camera</h3> -->
<select id="simulationSelector" onchange="simulationSelected(this.selectedIndex)" class="button"></select>
<button id="buttonRun" onclick="run()" class="button"></button>
<button onclick="reload()" class="button">Reload</button>
<button onclick="speed()" class="button">Change speed</button>
<button onclick="toggleNodes()" class="button">Toggle nodes</button>
<input type="checkbox" onclick="toggleHiglightNodes()"> Highlight self-colliding nodes
<input id="showDenseCheckbox" type="checkbox" onclick="onShowDense()"> Show dense
<input id="showReducedCheckbox" type="checkbox" onclick="onShowReduced()"> Show reduced
<br><br>
<span id="denseNodesCount">0</span> boundary nodes
<span id="surfacesCount">0</span> boundary surfaces
<span id="animationSpeed"></span> speed
<span id="nodesMode"></span> mode
<span id="count"></span>
<span id="skip"></span>
<span id="loadedProgress"></span>
<span id="animationProgress"></span>
<span id="error"></span>
<br><br>
<div id="container"></div>
<script src="https://unpkg.com/[email protected]/build/three.min.js"></script>
<script src="https://unpkg.com/[email protected]/examples/js/controls/OrbitControls.js"></script>
<script>
</script>
<script type="module">
window.onerror = (errorMsg, url, lineNumber) => {
alert("Error occured: " + errorMsg);
return false;
}
// ------------------------------------------------------------------
var paused = false;
var highlightNodes = false;
var nodesMode = 0;
var loadedProgress = 0;
var animationFrameFloat = 0.0;
var animationSpeed = 1.0;
var showDense = true;
var showReduced = false;
const meshColor = 0x8ecae6; // 0xd9dbdc;
const obstacleColor = 0xffb703; // 0xd9dbdc;
var scene;
var gRenderer;
var gCamera;
var gCameraControl;
var gMouseDown = false;
var meshes;
var animationSkip;
var animationCount;
var simulationName;
const output_path = './output';
const fileLoader = new THREE.FileLoader();
function animationFrame() {
return parseInt(animationFrameFloat)
}
window.simulationSelected = async (selectedIndex) => {
setRunButton(true);
simulationName = simulationSelector.value;
animationCount = listFile.steps[selectedIndex];
await loadDataAsync();
setRunButton(false);
}
window.reload = () => {
location.reload();
}
window.run = () => {
setRunButton(!paused);
}
window.speed = () => {
let maxSpeed = 2.0;
let step = 0.5;
animationSpeed = (animationSpeed % maxSpeed) + step;
setHtml("animationSpeed", animationSpeed);
}
window.toggleHiglightNodes = async () => {
highlightNodes = !highlightNodes;
setHtml("nodesMode", nodesMode);
await animationStepInnerAsync();
}
window.toggleNodes = async () => {
nodesMode += 1;
setHtml("nodesMode", nodesMode);
await animationStepInnerAsync();
}
window.onShowDense = async () => {
showDense = !showDense;
setCheckbox("showDenseCheckbox", showDense);
await animationStepInnerAsync();
}
window.onShowReduced = async () => {
showReduced = !showReduced;
setCheckbox("showReducedCheckbox", showReduced);
await animationStepInnerAsync();
}
setCheckbox("showDenseCheckbox", showDense);
setCheckbox("showReducedCheckbox", showReduced);
setRunButton(false);
setHtml("animationSpeed", animationSpeed);
setHtml("nodesMode", nodesMode);
var simulationSelector = document.getElementById('simulationSelector');
var listFile = await loadFileAsync(`${output_path}/three_list.json`);
simulationName = listFile.simulations[0];
animationCount = listFile.steps[0];
for (const simulationName of listFile.simulations) {
var opt = document.createElement('option');
opt.value = simulationName;
opt.innerHTML = simulationName;
simulationSelector.appendChild(opt);
}
function setHtml(label, value) {
document.getElementById(label).innerHTML = value;
}
function setCheckbox(label, value) {
document.getElementById(label).checked = value;
}
function setRunButton(new_paused) {
paused = new_paused;
var button = document.getElementById('buttonRun');
if (paused)
button.innerHTML = "Play";
else
button.innerHTML = "Pause";
}
function onWindowResize() {
gCamera.aspect = window.innerWidth / window.innerHeight;
gCamera.updateProjectionMatrix();
gRenderer.setSize(window.innerWidth, window.innerHeight);
}
async function loadFileAsync(filePath, i = 0, animationCount = 1) {
var fileContent = await fileLoader.setResponseType('json').loadAsync(
filePath,
function (xhr) {
loadedProgress = parseInt(((i + 1) / animationCount) * 100); // + xhr.loaded / xhr.total
setHtml("loadedProgress", `${loadedProgress}% loaded`);
},
function (err) {
document.getElementById("error").innerHTML = 'Error loading meshes';
}
);
return fileContent;
}
// ------------------------------------------------------------------
class Body {
getNodes(mesh) {
nodesMode = nodesMode % mesh.nodes_list.length;
setHtml("nodesMode", nodesMode);
var nodes = mesh.nodes_list[nodesMode];
return nodes;
}
getNodesReduced(mesh) {
return mesh.nodes_reduced_list[nodesMode];
}
getHighlightedNodes(mesh) {
return mesh.highlighted_nodes_list[nodesMode];
}
constructor(initialMesh) {
// physics
var nodes = this.getNodes(initialMesh);
var nodesReduced = this.getNodesReduced(initialMesh);
var boundary_surfaces = initialMesh.boundary_surfaces
this.denseNodesCount = nodes.length / 3;
this.surfacesCount = boundary_surfaces.length / 3;
this.denseNodes = new Float32Array(nodes);
// surface tri mesh
var geometry = new THREE.BufferGeometry();
geometry.setAttribute('position', new THREE.BufferAttribute(this.denseNodes, 3));
geometry.setIndex(boundary_surfaces);
var material = new THREE.MeshPhongMaterial({ color: meshColor, side: THREE.DoubleSide });
material.flatShading = true;
this.denseMesh = new THREE.Mesh(geometry, material);
this.denseMesh.name = "surfaceMesh";
// this.surfaceMesh.castShadow = true;
this.denseMesh.userData = this;
this.denseMesh.layers.enable(1);
this.denseMesh.geometry.computeVertexNormals();
this.denseMesh.visible = showDense;
if (nodesReduced == undefined) {
this.sparseNodes = null;
this.sparseMesh = null;
}
else {
this.sparseNodes = new Float32Array(nodesReduced);
var geometry = new THREE.BufferGeometry();
geometry.setAttribute('position', new THREE.BufferAttribute(this.sparseNodes, 3));
geometry.setIndex(initialMesh.boundary_edges_reduced);
var material = new THREE.LineBasicMaterial({ color: 0x0000ff, linewidth: 2 });
this.sparseMesh = new THREE.LineSegments(geometry, material);
this.sparseMesh.name = "sparseMesh";
// var material = new THREE.MeshPhongMaterial({ color: 0xff00ff, side: THREE.DoubleSide });
// material.flatShading = true;
// this.tetMesh = new THREE.Mesh(geometry, material);
this.sparseMesh.visible = showReduced;
// console.log(JSON.stringify(tetMesh.verts));
}
}
updateMesh(mesh) {
var nodes = this.getNodes(mesh);
var nodes_reduced = this.getNodesReduced(mesh);
for (var i = 0; i < this.denseNodes.length; i++)
this.denseNodes[i] = nodes[i];
// this.surfaceMesh.geometry.computeVertexNormals();
this.denseMesh.geometry.attributes.position.needsUpdate = true;
// this.surfaceMesh.geometry.computeBoundingSphere();
this.denseMesh.visible = showDense;
if (this.sparseNodes) {
for (var i = 0; i < this.sparseNodes.length; i++)
this.sparseNodes[i] = nodes_reduced[i];
this.sparseMesh.geometry.attributes.position.needsUpdate = true;
this.sparseMesh.visible = showReduced;
}
}
addToScene(scene) {
scene.remove(scene.getObjectByName("surfaceMesh"));
scene.remove(scene.getObjectByName("sparseMesh"));
scene.add(this.denseMesh);
if (this.sparseMesh != null) {
scene.add(this.sparseMesh);
}
}
}
function addObstacle(scene, mesh) {
var obs = mesh.linear_obstacles;
const dir = new THREE.Vector3(obs[0], obs[1], obs[2]);
dir.normalize();
const origin = new THREE.Vector3(obs[3], obs[4], obs[5]);
var length = 0.5
var arrowHelper = new THREE.ArrowHelper(dir, origin, length, 0xff0000);
scene.remove(scene.getObjectByName("arrowHelper"));
scene.remove(scene.getObjectByName("ground"));
arrowHelper.name = "arrowHelper";
// scene.add(arrowHelper);
var ground = new THREE.Mesh(
new THREE.PlaneBufferGeometry(2, 2, 1, 1),
new THREE.MeshPhongMaterial({ color: 0x414b54, shininess: 50, side: THREE.DoubleSide })
);
ground.lookAt(dir);
ground.position.set(obs[3], obs[4], obs[5]);
ground.receiveShadow = true;
ground.name = "ground";
scene.add(ground);
if (mesh.mesh_obstacles_nodes != undefined) {
for (var i = 0; i < mesh.mesh_obstacles_nodes.length; i += 1) {
var obstacle_nodes = new Float32Array(mesh.mesh_obstacles_nodes[i]);
var obstacle_boundary_surfaces = mesh.mesh_obstacles_boundary_surfaces[i];
var geometry = new THREE.BufferGeometry();
geometry.setAttribute('position', new THREE.BufferAttribute(obstacle_nodes, 3));
geometry.setIndex(obstacle_boundary_surfaces);
var material = new THREE.MeshPhongMaterial({ color: obstacleColor, side: THREE.DoubleSide });
material.flatShading = true;
var obstacleMesh = new THREE.Mesh(geometry, material);
obstacleMesh.name = 'obstacleMesh${i}';
// this.surfaceMesh.castShadow = true;
obstacleMesh.userData = this;
obstacleMesh.layers.enable(1);
obstacleMesh.geometry.computeVertexNormals();
obstacleMesh.visible = showDense;
scene.add(obstacleMesh);
}
}
}
// ------------------------------------------
function initThreeScene() {
scene = new THREE.Scene();
// scene.add(new THREE.AxesHelper(0.2));
// Lights
scene.add(new THREE.AmbientLight(0xffffff, 0.5));
// scene.fog = new THREE.Fog(0x000000, 0, 15);
// var pos = (0.46668502, 0.66293614, 1.12681618);
var topLight = new THREE.DirectionalLight(0xffffff, 0.4);
topLight.position.set(0, 0, 5);
topLight.target.position.set(0, 0, 0);
scene.add(topLight);
// scene.add(new THREE.DirectionalLightHelper(topLight, 0.1));
var bottomLight = new THREE.DirectionalLight(0xffffff, 0.4);
bottomLight.position.set(0, 0, -5);
bottomLight.target.position.set(0, 0, 0);
scene.add(bottomLight);
// scene.add(new THREE.DirectionalLightHelper(bottomLight, 0.1));
// Geometry
var helper = new THREE.GridHelper(20, 20);
helper.material.opacity = 1.0;
helper.material.transparent = true;
helper.position.set(0, 0.002, 0);
// gThreeScene.add(helper);
// Renderer
gRenderer = new THREE.WebGLRenderer();
gRenderer.shadowMap.enabled = true;
gRenderer.setPixelRatio(window.devicePixelRatio);
gRenderer.setSize(0.8 * window.innerWidth, 0.8 * window.innerHeight);
window.addEventListener('resize', onWindowResize, false);
container.appendChild(gRenderer.domElement);
// Camera
gCamera = new THREE.PerspectiveCamera(70, window.innerWidth / window.innerHeight, 0.01, 100);
gCamera.position.set(0, 4, 4);
gCamera.updateMatrixWorld();
gCamera.up.set(0, 0, 1);
scene.add(gCamera);
gCameraControl = new THREE.OrbitControls(gCamera, gRenderer.domElement);
gCameraControl.zoomSpeed = 0.5;
gCameraControl.panSpeed = 0.4;
}
async function reloadMeshesAsync() {
meshes = [await loadFileAsync(`${simulationName}/0.json`)];
animationSkip = meshes[0].skip;
// animationCount = count * animationSkip;// meshes.count * meshes.skip;
for (var i = animationSkip; i < animationCount; i += animationSkip) {
meshes.push(await loadFileAsync(`${simulationName}/${i}.json`, i, animationCount))
}
document.getElementById("loadedProgress").innerHTML = '';
setHtml("count", `${animationCount} count`);
setHtml("skip", `${animationSkip} skip`);
}
async function initMeshAsync() {
var mesh = meshes[0]
body = new Body(mesh);
body.addToScene(scene);
addObstacle(scene, mesh);
setHtml("denseNodesCount", body.denseNodesCount);
setHtml("surfacesCount", body.surfacesCount);
}
async function runAnimationAsync() {
// if (stop)
// return;
await animationStepAsync();
gRenderer.render(scene, gCamera);
requestAnimationFrame(runAnimationAsync);
}
async function animationStepAsync() {
if (paused)
return;
animationFrameFloat += animationSpeed;
if (animationFrame() > animationCount)
animationFrameFloat = 0;
if (animationFrame() % animationSkip != 0)
return;
loadedProgress = parseInt(animationFrame() / animationCount * 100);
// setHtml("animationProgress", `${loadedProgress}% frame`);
setHtml("animationProgress", `${animationFrame()} frame`);
await animationStepInnerAsync();
}
async function animationStepInnerAsync() {
var step = parseInt((animationFrame() % animationCount) / animationSkip);
var mesh = meshes[step];
body.updateMesh(mesh);
addObstacle(scene, mesh);
if (highlightNodes)
rehighlightNodes(body.getHighlightedNodes(mesh));
else
clearHighlightNodes();
}
function clearHighlightNodes() {
var oldBallMesh = scene.getObjectByName("ballMesh");
if (oldBallMesh !== undefined) {
for (var child in oldBallMesh.children) {
scene.remove(child);
}
scene.remove(oldBallMesh);
}
}
function rehighlightNodes(nodes) {
var radius = 0.015;
var segments = 8;
var nodesCount = nodes.length / 3;
clearHighlightNodes();
if (nodes.length == 0)
return;
var ballMesh = new THREE.Object3D();
ballMesh.name = "ballMesh";
for (var i = 0; i < nodesCount; i++) {
var pos = new THREE.Vector3(nodes[3 * i], nodes[3 * i + 1], nodes[3 * i + 2]);
var geometry = new THREE.SphereGeometry(radius, segments, segments);
var material = new THREE.MeshPhongMaterial({ color: 0xff0000 });
var ball = new THREE.Mesh(geometry, material); // THREE.InstancedMesh( geometry, material, this.numBalls )
ball.position.copy(pos);
ballMesh.add(ball);
// ball.geometry.attributes.position.needsUpdate = true;
}
scene.add(ballMesh);
}
async function loadDataAsync() {
await reloadMeshesAsync();
await initMeshAsync();
}
var body;
initThreeScene();
onWindowResize();
await loadDataAsync();
await runAnimationAsync();
</script>
</body>
</html>