three-stdlib/geometries/ParametricGeometries.cjs.map

stand-alone library of threejs examples

{"version":3,"file":"ParametricGeometries.cjs","sources":["../../src/geometries/ParametricGeometries.js"],"sourcesContent":["import { Curve, Vector3 } from 'three'\nimport { ParametricGeometry } from './ParametricGeometry'\n\nclass TubeGeometry extends ParametricGeometry {\n  constructor(path, segments = 64, radius = 1, segmentsRadius = 8, closed = false) {\n    const numpoints = segments + 1\n\n    const frames = path.computeFrenetFrames(segments, closed),\n      tangents = frames.tangents,\n      normals = frames.normals,\n      binormals = frames.binormals\n\n    const position = new Vector3()\n\n    function ParametricTube(u, v, target) {\n      v *= 2 * Math.PI\n\n      const i = Math.floor(u * (numpoints - 1))\n\n      path.getPointAt(u, position)\n\n      const normal = normals[i]\n      const binormal = binormals[i]\n\n      const cx = -radius * Math.cos(v) // TODO: Hack: Negating it so it faces outside.\n      const cy = radius * Math.sin(v)\n\n      position.x += cx * normal.x + cy * binormal.x\n      position.y += cx * normal.y + cy * binormal.y\n      position.z += cx * normal.z + cy * binormal.z\n\n      target.copy(position)\n    }\n\n    super(ParametricTube, segments, segmentsRadius)\n\n    // proxy internals\n\n    this.tangents = tangents\n    this.normals = normals\n    this.binormals = binormals\n\n    this.path = path\n    this.segments = segments\n    this.radius = radius\n    this.segmentsRadius = segmentsRadius\n    this.closed = closed\n  }\n}\n\n/**\n * Experimental primitive geometry creation using Surface Parametric equations\n */\nconst ParametricGeometries = {\n  klein: function (v, u, target) {\n    u *= Math.PI\n    v *= 2 * Math.PI\n\n    u = u * 2\n    let x, z\n    if (u < Math.PI) {\n      x = 3 * Math.cos(u) * (1 + Math.sin(u)) + 2 * (1 - Math.cos(u) / 2) * Math.cos(u) * Math.cos(v)\n      z = -8 * Math.sin(u) - 2 * (1 - Math.cos(u) / 2) * Math.sin(u) * Math.cos(v)\n    } else {\n      x = 3 * Math.cos(u) * (1 + Math.sin(u)) + 2 * (1 - Math.cos(u) / 2) * Math.cos(v + Math.PI)\n      z = -8 * Math.sin(u)\n    }\n\n    const y = -2 * (1 - Math.cos(u) / 2) * Math.sin(v)\n\n    target.set(x, y, z)\n  },\n\n  plane: function (width, height) {\n    return function (u, v, target) {\n      const x = u * width\n      const y = 0\n      const z = v * height\n\n      target.set(x, y, z)\n    }\n  },\n\n  mobius: function (u, t, target) {\n    // flat mobius strip\n    // http://www.wolframalpha.com/input/?i=M%C3%B6bius+strip+parametric+equations&lk=1&a=ClashPrefs_*Surface.MoebiusStrip.SurfaceProperty.ParametricEquations-\n    u = u - 0.5\n    const v = 2 * Math.PI * t\n\n    const a = 2\n\n    const x = Math.cos(v) * (a + u * Math.cos(v / 2))\n    const y = Math.sin(v) * (a + u * Math.cos(v / 2))\n    const z = u * Math.sin(v / 2)\n\n    target.set(x, y, z)\n  },\n\n  mobius3d: function (u, t, target) {\n    // volumetric mobius strip\n\n    u *= Math.PI\n    t *= 2 * Math.PI\n\n    u = u * 2\n    const phi = u / 2\n    const major = 2.25,\n      a = 0.125,\n      b = 0.65\n\n    let x = a * Math.cos(t) * Math.cos(phi) - b * Math.sin(t) * Math.sin(phi)\n    const z = a * Math.cos(t) * Math.sin(phi) + b * Math.sin(t) * Math.cos(phi)\n    const y = (major + x) * Math.sin(u)\n    x = (major + x) * Math.cos(u)\n\n    target.set(x, y, z)\n  },\n  TubeGeometry,\n  TorusKnotGeometry: class TorusKnotGeometry extends TubeGeometry {\n    constructor(radius = 200, tube = 40, segmentsT = 64, segmentsR = 8, p = 2, q = 3) {\n      class TorusKnotCurve extends Curve {\n        getPoint(t, optionalTarget = new Vector3()) {\n          const point = optionalTarget\n\n          t *= Math.PI * 2\n\n          const r = 0.5\n\n          const x = (1 + r * Math.cos(q * t)) * Math.cos(p * t)\n          const y = (1 + r * Math.cos(q * t)) * Math.sin(p * t)\n          const z = r * Math.sin(q * t)\n\n          return point.set(x, y, z).multiplyScalar(radius)\n        }\n      }\n\n      const segments = segmentsT\n      const radiusSegments = segmentsR\n      const extrudePath = new TorusKnotCurve()\n\n      super(extrudePath, segments, tube, radiusSegments, true, false)\n\n      this.radius = radius\n      this.tube = tube\n      this.segmentsT = segmentsT\n      this.segmentsR = segmentsR\n      this.p = p\n      this.q = q\n    }\n  },\n  SphereGeometry: class SphereGeometry extends ParametricGeometry {\n    constructor(size, u, v) {\n      function sphere(u, v, target) {\n        u *= Math.PI\n        v *= 2 * Math.PI\n\n        const x = size * Math.sin(u) * Math.cos(v)\n        const y = size * Math.sin(u) * Math.sin(v)\n        const z = size * Math.cos(u)\n\n        target.set(x, y, z)\n      }\n\n      super(sphere, u, v)\n    }\n  },\n  PlaneGeometry: class PlaneGeometry extends ParametricGeometry {\n    constructor(width, depth, segmentsWidth, segmentsDepth) {\n      function plane(u, v, target) {\n        const x = u * width\n        const y = 0\n        const z = v * depth\n\n        target.set(x, y, z)\n      }\n\n      super(plane, segmentsWidth, segmentsDepth)\n    }\n  },\n}\n\nexport { ParametricGeometries 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