comments

[cloth_sim] / Scripts / main.js

diff --git a/Scripts/main.js b/Scripts/main.js
index 4e7c2ef7bb32e51f874a950f2697f75586f547e4..1a30f7a9db2cc3c240631e90e03d8505e0a00c15 100644 (file)
--- a/Scripts/main.js
+++ b/Scripts/main.js
@@ -1,42 +1,21 @@
-import { Face, Spring, Cloth } from './cloth.js';\r

 \r
 \r
 \r
 \r

-/**\r
- * rendering\r
- * Einheiten konsistent\r
- * Wind\r
- * evtl. an Stoff ziehen\r
- */\r
-\r
-\r
-class Point {\r
-  constructor(x, y) {\r
-    this.x = x;\r
-    this.y = y;\r
-  }\r
+function addLights(scene){\r
+  scene.add(new THREE.AmbientLight(0x222222));\r

 \r
 \r

-  add(that) {\r
-    return new Point(\r
-      this.x + that.x,\r
-      this.y + that.y\r
-    );\r
-  }\r
+  const light1 = new THREE.PointLight(0xffffff, 1, 50);\r
+  light1.position.set(15, 1, 40);\r
+  scene.add(light1);\r

 \r
 \r

-  sub(that) {\r
-    return new Point(\r
-      this.x - that.x,\r
-      this.y - that.y\r
-    );\r
-  }\r
+  const light2 = new THREE.PointLight(0xffffff, 1, 50);\r
+  light2.position.set(-15, 0, 40);\r
+  scene.add(light2);\r

 \r
 \r

-  dist(that) {\r
-    let a = this.x - that.x;\r
-    let b = this.y - that.y;\r
-    return Math.sqrt(a * a + b * b)\r
-  }\r
+  const light3 = new THREE.PointLight(0xffffff, 1, 50);\r
+  light3.position.set(0, -1, 40);\r
+  scene.add(light3);\r

 }\r
 \r
 }\r
 \r

-\r

 /**\r
  * setup THREE JS Scene, Camera and Renderer\r
  */\r
 /**\r
  * setup THREE JS Scene, Camera and Renderer\r
  */\r


@@ -46,17 +25,39 @@ function setup_scene(canvasSpace) {
   const renderer = new THREE.WebGLRenderer();\r
   /** size canvas to leave some space for UI */\r
   renderer.setSize(window.innerWidth, window.innerHeight - canvasSpace);\r
   const renderer = new THREE.WebGLRenderer();\r
   /** size canvas to leave some space for UI */\r
   renderer.setSize(window.innerWidth, window.innerHeight - canvasSpace);\r

+  renderer.antialias = true;\r

   /** embed canvas in HTML */\r
   document.getElementById("threejscontainer").appendChild(renderer.domElement);\r
 \r
   /** embed canvas in HTML */\r
   document.getElementById("threejscontainer").appendChild(renderer.domElement);\r
 \r

+  /** add orbit controls */\r
+  const controls = new THREE.OrbitControls(camera, renderer.domElement);\r
+  controls.target.set(0, 0, 0);\r
+  controls.update();\r
+\r
+  /** add scene background */\r
+  const loader = new THREE.TextureLoader();\r
+  const texture = loader.load(\r
+    'Textures/tears_of_steel_bridge_2k.jpg',\r
+    () => {\r
+      const rt = new THREE.WebGLCubeRenderTarget(texture.image.height);\r
+      rt.fromEquirectangularTexture(renderer, texture);\r
+      scene.background = rt;\r
+    });\r
+\r
+  /** add flag pole */\r
+  const geometry = new THREE.CylinderGeometry(0.02, 0.02, 5, 32);\r
+  const material = new THREE.MeshStandardMaterial({color: 0xffffff});\r
+  const cylinder = new THREE.Mesh(geometry, material);\r
+  cylinder.position.set(-0.5, -2.25, 0);\r
+  scene.add(cylinder);\r
+\r

   /** add global light */\r
   const directionalLight = new THREE.DirectionalLight(0xffffff, 1);\r
   scene.add(directionalLight);\r
 \r
   /** position camera */\r
   /** add global light */\r
   const directionalLight = new THREE.DirectionalLight(0xffffff, 1);\r
   scene.add(directionalLight);\r
 \r
   /** position camera */\r

-  camera.position.y = 5;\r
-  camera.position.z = 10;\r
-\r
+  camera.position.z = 2;\r
+  addLights(scene);\r

   return [scene, camera, renderer];\r
 }\r
 \r
   return [scene, camera, renderer];\r
 }\r
 \r


@@ -64,8 +65,7 @@ function setup_scene(canvasSpace) {
 document.body.onload = init;\r
 \r
 function init() {\r
 document.body.onload = init;\r
 \r
 function init() {\r

-  let mousePos = new Point();\r
-  let previousClothSimulation;\r
+  let mousePos = new THREE.Vector2();\r

   \r
   /**\r
    * Space left empty under canvas\r
   \r
   /**\r
    * Space left empty under canvas\r


@@ -74,50 +74,74 @@ function init() {
   const canvasSpace = 200;\r
 \r
   /** Constant Frame Time */\r
   const canvasSpace = 200;\r
 \r
   /** Constant Frame Time */\r

-  const frameTime = 1000.0 / 60.0;\r
+  const frameTime = 1000.0 / 200.0;\r

 \r
   /** Setup scene */\r
   let [scene, camera, renderer] = setup_scene(canvasSpace);\r
   \r
 \r
   /** Setup scene */\r
   let [scene, camera, renderer] = setup_scene(canvasSpace);\r
   \r

-  /** setup cloth and generate debug mesh */\r
-  let cloth = new Cloth();\r
-  cloth.createBasic(10, 10, 10, 10);\r
-  //cloth.createDebugMesh(scene);\r
-\r
-  //const material = new THREE.MeshBasicMaterial({ color: 0x0000ff, side: THREE.DoubleSide });\r
-  const material = new THREE.MeshPhongMaterial({ color: 0x0000ff, side: THREE.DoubleSide });\r
-  const mesh = new THREE.Mesh(cloth.geometry, material);\r
-  //const mesh = new THREE.WireframeGeometry(cloth.geometry);\r
-  //const line = new THREE.LineSegments(mesh);\r
-  //line.material.depthTest = false;\r
-  //line.material.opacity = 0.25;\r
-  //line.material.transparent = true;\r
-  scene.add(mesh);\r
-\r
-  scene.add( new THREE.AmbientLight( 0x666666 ) );\r
-\r
-  const light = new THREE.DirectionalLight( 0xffffff, 0.5 );\r
-  light.position.set( 0, 1, 0.5 );\r
-  scene.add( light );\r
+  const loader = new THREE.TextureLoader();\r
+  //Red color: 0xC70039\r
+\r
+  /** Create cloth and generate mesh */\r
+  const cloth = new Cloth(1, 0.5, 20, 20);\r
+  const clothGeometry = cloth.generateGeometry();\r
+  const clothMaterial = new THREE.MeshStandardMaterial({ map: loader.load('Textures/hsrm2.png'), color: 0xffffff, side: THREE.DoubleSide, flatShading: false });\r
+  //const clothMaterial = new THREE.MeshStandardMaterial({ color: 0xC70039, side: THREE.DoubleSide, flatShading: false });\r
+  const clothMesh = new THREE.Mesh(clothGeometry, clothMaterial);\r
+  scene.add(clothMesh);\r
+  \r
+  /** Register wind checkbox */\r
+  document.getElementById("windToggle").checked = options.wind;\r
+  document.getElementById("windToggle").onchange = (e) => {\r
+    options.wind = e.target.checked;\r
+  };\r

 \r
 \r

+  let raycaster = new THREE.Raycaster();\r
+  let intersects;\r
+  let windKeyDown = false;\r
+  let dragKeyDown = false;\r
+  let draggedIndex = -1;\r

   /**\r
    * function called every frame\r
    * @param {number} dt - time passed since last frame in ms\r
    */\r
   function animate(dt) {\r
   /**\r
    * function called every frame\r
    * @param {number} dt - time passed since last frame in ms\r
    */\r
   function animate(dt) {\r

-    cloth.simulate(dt/1000);\r
-\r
+    /** run simulation step */\r
+    cloth.simulate(dt / 1000);\r
+\r
+    cloth.updateGeometry(clothGeometry);\r
+\r
+    /** raycast from camera to cursor */\r
+    raycaster.setFromCamera(new THREE.Vector2((mousePos.x / w) * 2 - 1, ((h - mousePos.y) / h) * 2 - 1), camera);\r
+    intersects = raycaster.intersectObject(clothMesh);\r
+\r
+    /** provide user interaction */\r
+    if (intersects.length > 0) {\r
+      if (windKeyDown)\r
+        cloth.blow(camera.position, intersects);\r
+      /** "grab" vertex index */\r
+      if (dragKeyDown && draggedIndex == -1)\r
+        draggedIndex = intersects[0].face.a;\r
+    }\r
+    if (dragKeyDown && draggedIndex != -1)\r
+      cloth.drag(calculateMousePosToWorld(mousePos), draggedIndex);\r
+\r
+    /** queue next frame */\r

     setTimeout(() => {\r
       animate(frameTime);\r
     }, frameTime);\r
     setTimeout(() => {\r
       animate(frameTime);\r
     }, frameTime);\r

+\r

     renderer.render(scene, camera);\r
   }\r
 \r
     renderer.render(scene, camera);\r
   }\r
 \r

+\r

   /** add callback for window resize */\r
   let canvas = document.getElementsByTagName("canvas")[0];\r
   /** add callback for window resize */\r
   let canvas = document.getElementsByTagName("canvas")[0];\r

+  let w = window.innerWidth;\r
+  let h = window.innerHeight - canvasSpace;\r

   let resize = function () {\r
   let resize = function () {\r

-    let w = window.innerWidth;\r
-    let h = window.innerHeight - 200;\r
+    w = window.innerWidth;\r
+    h = window.innerHeight - canvasSpace;\r

     canvas.width = w;\r
     canvas.height = h;\r
   }\r
     canvas.width = w;\r
     canvas.height = h;\r
   }\r


@@ -129,12 +153,58 @@ function init() {
    * start rendering\r
    */\r
   if (canvas.getContext) {\r
    * start rendering\r
    */\r
   if (canvas.getContext) {\r

-    animate(performance.now());\r
+    animate(frameTime);\r

   }\r
 \r
   }\r
 \r

+  \r
+\r

   /** add mouse move callback */\r
   canvas.onmousemove = (evt) => {\r
     mousePos.x = evt.clientX;\r
     mousePos.y = evt.clientY;\r
   };\r
   /** add mouse move callback */\r
   canvas.onmousemove = (evt) => {\r
     mousePos.x = evt.clientX;\r
     mousePos.y = evt.clientY;\r
   };\r

+\r
+  /**\r
+   * Prevent context menu while blowing wind\r
+   */\r
+  canvas.addEventListener('contextmenu', function(evt) { \r
+    evt.preventDefault();\r
+  }, false);\r
+\r
+  /** register key events */\r
+  document.onkeydown = (evt) => {\r
+    if (evt.code === "KeyW")\r
+      windKeyDown = true;\r
+    if (evt.code === "KeyD")\r
+      dragKeyDown = true;\r
+  };\r
+\r
+  document.onkeyup = (evt) => {\r
+    if (evt.code === "KeyW")\r
+      windKeyDown = false;\r
+    if (evt.code === "KeyD") {\r
+      dragKeyDown = false;\r
+      draggedIndex = -1;\r
+    }\r
+  };\r
+\r
+  /** helper function to turn mouse position into 3D coordinates */\r
+  function calculateMousePosToWorld(mousePos){\r
+    var vec = new THREE.Vector3(); // create once and reuse\r
+    var pos = new THREE.Vector3(); // create once and reuse\r
+\r
+    vec.set(\r
+      (mousePos.x / window.innerWidth) * 2 - 1,\r
+    - (mousePos.y / window.innerHeight) * 2 + 1,\r
+      0.5);\r
+\r
+    vec.unproject(camera);\r
+\r
+    vec.sub(camera.position).normalize();\r
+\r
+    var distance = - camera.position.z / vec.z;\r
+\r
+    pos.copy(camera.position).add(vec.multiplyScalar(distance));\r
+    return pos;\r
+  }\r

 }
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 }
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