import { bitangentView } from './Bitangent.js'; import { normalView, transformedNormalView } from './Normal.js'; import { tangentView } from './Tangent.js'; import { mat3 } from '../tsl/TSLBase.js'; import { mix } from '../math/MathNode.js'; import { anisotropy, anisotropyB, roughness } from '../core/PropertyNode.js'; import { positionViewDirection } from './Position.js'; export const TBNViewMatrix = /*@__PURE__*/ mat3( tangentView, bitangentView, normalView ); export const parallaxDirection = /*@__PURE__*/ positionViewDirection.mul( TBNViewMatrix )/*.normalize()*/; export const parallaxUV = ( uv, scale ) => uv.sub( parallaxDirection.mul( scale ) ); export const transformedBentNormalView = /*@__PURE__*/ ( () => { // https://google.github.io/filament/Filament.md.html#lighting/imagebasedlights/anisotropy let bentNormal = anisotropyB.cross( positionViewDirection ); bentNormal = bentNormal.cross( anisotropyB ).normalize(); bentNormal = mix( bentNormal, transformedNormalView, anisotropy.mul( roughness.oneMinus() ).oneMinus().pow2().pow2() ).normalize(); return bentNormal; } )();