-function init() {\r
- class Point {\r
- constructor(x, y) {\r
- this.x = x;\r
- this.y = y;\r
- }\r
-\r
- add(that) {\r
- return new Point(\r
- this.x + that.x,\r
- this.y + that.y\r
- );\r
- }\r
-\r
- sub(that) {\r
- return new Point(\r
- this.x - that.x,\r
- this.y - that.y\r
- );\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
- }\r
-\r
- class Cloth {\r
- geometry = new THREE.Geometry();\r
-\r
- \r
-\r
- static CreateBasic(width, height, numPointsWidth, numPointsHeight) {\r
- let vertices = [];\r
- let faces = [];\r
-\r
- let stepWidth = width / (numPointsWidth - 1);\r
- let stepHeight = height / (numPointsHeight - 1);\r
-\r
- for (let y = 0; y < numPointsHeight; y++) {\r
- for (let x = 0; x < numPointsWidth; x++) {\r
- vertices.push(\r
- new THREE.Vector3(x * stepWidth, height - y * stepHeight, 0)\r
- );\r
- }\r
- }\r
-\r
- function getVertexIndex(x, y) {\r
- return y * numPointsWidth + x;\r
- }\r
- \r
- for (let y = 0; y < numPointsHeight - 1; y++) {\r
- for (let x = 0; x < numPointsWidth - 1; x++) {\r
- faces.push(\r
- new THREE.Face3(\r
- getVertexIndex(x, y),\r
- getVertexIndex(x, y + 1),\r
- getVertexIndex(x + 1, y),\r
- )\r
- );\r
- faces.push(\r
- new THREE.Face3(\r
- getVertexIndex(x + 1, y),\r
- getVertexIndex(x, y + 1),\r
- getVertexIndex(x + 1, y + 1),\r
- )\r
- );\r
- }\r
- }\r
-\r
- return this.CreateExplicit(vertices, faces);\r
- }\r
-\r
- static CreateExplicit(vertices, faces) {\r
- let result = new Cloth();\r
-\r
- for (let i in vertices) {\r
- result.geometry.vertices.push(vertices[i]);\r
- }\r
- for (let i in faces) {\r
- result.geometry.faces.push(faces[i]);\r
- }\r
-\r
- result.geometry.computeBoundingSphere();\r
-\r
- return result;\r
- }\r
- }\r
-\r
- let mousePos = new Point();\r
-\r
- const canvasSpace = 200;\r
-\r
- const scene = new THREE.Scene();\r
- const camera = new THREE.PerspectiveCamera(75, window.innerWidth / (window.innerHeight - canvasSpace), 0.1, 1000);\r
-\r
- const renderer = new THREE.WebGLRenderer();\r
- renderer.setSize(window.innerWidth, window.innerHeight - canvasSpace);\r
- document.getElementById("threejscontainer").appendChild(renderer.domElement);\r
-\r
- const directionalLight = new THREE.DirectionalLight(0xffffff, 1);\r
- scene.add(directionalLight);\r
-\r
- let cloth = Cloth.CreateBasic(10, 10, 4, 4);\r
- const material = new THREE.MeshBasicMaterial({ color: 0x00ff00 });\r
- const mesh = new THREE.Mesh(cloth.geometry, material);\r
- scene.add(mesh);\r
-\r
- camera.position.y = 5;\r
- camera.position.z = 10;\r
-\r
- function animate(dt) {\r
- requestAnimationFrame(animate);\r
- renderer.render(scene, camera);\r
- }\r
-\r
- let canvas = document.getElementsByTagName("canvas")[0];\r
- let resize = function () {\r
- w = window.innerWidth;\r
- h = window.innerHeight - 200;\r
- canvas.width = w;\r
- canvas.height = h;\r
- }\r
- window.onresize = resize;\r
- resize();\r
- if (canvas.getContext) {\r
- ctx = canvas.getContext('2d');\r
- animate(performance.now());\r
- }\r
- canvas.onmousemove = (evt) => {\r
- mousePos.x = evt.clientX;\r
- mousePos.y = evt.clientY;\r
- };\r
-}
\ No newline at end of file