@openhps/core/src/three/nodes/functions/BSDF/D_GGX_Anisotropic.js

Open Hybrid Positioning System - Core component

"use strict";

Object.defineProperty(exports, "__esModule", {
  value: true
});
exports.default = void 0;
var _TSLBase = require("../../tsl/TSLBase.js");
const RECIPROCAL_PI = /*@__PURE__*/(0, _TSLBase.float)(1 / Math.PI);

// https://google.github.io/filament/Filament.md.html#materialsystem/anisotropicmodel/anisotropicspecularbrdf

const D_GGX_Anisotropic = /*@__PURE__*/(0, _TSLBase.Fn)(({
  alphaT,
  alphaB,
  dotNH,
  dotTH,
  dotBH
}) => {
  const a2 = alphaT.mul(alphaB);
  const v = (0, _TSLBase.vec3)(alphaB.mul(dotTH), alphaT.mul(dotBH), a2.mul(dotNH));
  const v2 = v.dot(v);
  const w2 = a2.div(v2);
  return RECIPROCAL_PI.mul(a2.mul(w2.pow2()));
}).setLayout({
  name: 'D_GGX_Anisotropic',
  type: 'float',
  inputs: [{
    name: 'alphaT',
    type: 'float',
    qualifier: 'in'
  }, {
    name: 'alphaB',
    type: 'float',
    qualifier: 'in'
  }, {
    name: 'dotNH',
    type: 'float',
    qualifier: 'in'
  }, {
    name: 'dotTH',
    type: 'float',
    qualifier: 'in'
  }, {
    name: 'dotBH',
    type: 'float',
    qualifier: 'in'
  }]
});
var _default = exports.default = D_GGX_Anisotropic;