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import { Face, Spring, Cloth } from './cloth.js';
/**
* rendering
* Einheiten konsistent
* Wind
* evtl. an Stoff ziehen
*/
/**
* setup THREE JS Scene, Camera and Renderer
*/
function setup_scene(canvasSpace) {
const scene = new THREE.Scene();
const camera = new THREE.PerspectiveCamera(75, window.innerWidth / (window.innerHeight - canvasSpace), 0.1, 1000);
const renderer = new THREE.WebGLRenderer();
/** size canvas to leave some space for UI */
renderer.setSize(window.innerWidth, window.innerHeight - canvasSpace);
/** embed canvas in HTML */
document.getElementById("threejscontainer").appendChild(renderer.domElement);
/** add global light */
const directionalLight = new THREE.DirectionalLight(0xffffff, 1);
scene.add(directionalLight);
/** position camera */
camera.position.y = 5;
camera.position.z = 10;
return [scene, camera, renderer];
}
/** call "init" when document is fully loaded */
document.body.onload = init;
function init() {
let mousePos = new THREE.Vector2();
let previousClothSimulation;
/**
* Space left empty under canvas
* for UI elements
*/
const canvasSpace = 200;
/** Constant Frame Time */
const frameTime = 1000.0 / 60.0;
/** Setup scene */
let [scene, camera, renderer] = setup_scene(canvasSpace);
/** setup cloth and generate debug mesh */
let cloth = new Cloth();
cloth.createBasic(10, 10, 10, 10);
//cloth.createDebugMesh(scene);
//const material = new THREE.MeshBasicMaterial({ color: 0x0000ff, side: THREE.DoubleSide });
const material = new THREE.MeshStandardMaterial({ color: 0xC70039, side: THREE.DoubleSide, flatShading: false });
const mesh = new THREE.Mesh(cloth.geometry, material);
//const mesh = new THREE.WireframeGeometry(cloth.geometry);
//const line = new THREE.LineSegments(mesh);
//line.material.depthTest = false;
//line.material.opacity = 0.25;
//line.material.transparent = true;
scene.add(mesh);
scene.add( new THREE.AmbientLight( 0x222222 ) );
const light1 = new THREE.PointLight( 0xffffff, 1, 50 );
light1.position.set( 15, 1, 40 );
scene.add( light1 );
const light2 = new THREE.PointLight( 0xffffff, 1, 50 );
light2.position.set( -15, 0, 40 );
scene.add( light2 );
const light3 = new THREE.PointLight( 0xffffff, 1, 50 );
light3.position.set( 0, -1, 40 );
scene.add( light3 );
let raycaster = new THREE.Raycaster();
let intersects;
let rightMousePressed;
/**
* function called every frame
* @param {number} dt - time passed since last frame in ms
*/
function animate(dt) {
cloth.simulate(dt/1000);
raycaster.setFromCamera( new THREE.Vector2((mousePos.x / w) * 2 - 1, ((h - mousePos.y) / h) * 2 - 1), camera );
intersects = raycaster.intersectObject( mesh );
if ( intersects.length > 0 && rightMousePressed) {
cloth.wind(intersects);
}
setTimeout(() => {
animate(frameTime);
}, frameTime);
renderer.render(scene, camera);
}
/** add callback for window resize */
let canvas = document.getElementsByTagName("canvas")[0];
let w = window.innerWidth;
let h = window.innerHeight - canvasSpace;
let resize = function () {
w = window.innerWidth;
h = window.innerHeight - canvasSpace;
canvas.width = w;
canvas.height = h;
}
window.onresize = resize;
resize();
/**
* if canvas has been successfully initialized
* start rendering
*/
if (canvas.getContext) {
animate(performance.now());
}
/** add mouse move callback */
canvas.onmousemove = (evt) => {
mousePos.x = evt.clientX;
mousePos.y = evt.clientY;
var vec = new THREE.Vector3(); // create once and reuse
var pos = new THREE.Vector3(); // create once and reuse
vec.set(
( evt.clientX / window.innerWidth ) * 2 - 1,
- ( evt.clientY / window.innerHeight ) * 2 + 1,
0.5 );
vec.unproject( camera );
vec.sub( camera.position ).normalize();
var distance = - camera.position.z / vec.z;
pos.copy( camera.position ).add( vec.multiplyScalar( distance ) );
cloth.mouseMove(pos);
};
canvas.onmousedown = (evt) => {
rightMousePressed = evt.button == 2;
if(intersects.length > 0 && evt.button == 0){
cloth.mousePress(intersects);
}
}
canvas.onmouseup = (evt) => {
cloth.mouseRelease();
rightMousePressed = false;
}
}
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