26 lines
1.1 KiB
JavaScript
26 lines
1.1 KiB
JavaScript
import { bitangentView } from './BitangentNode.js';
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import { normalView, transformedNormalView } from './NormalNode.js';
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import { tangentView } from './TangentNode.js';
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import { mat3 } from '../shadernode/ShaderNode.js';
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import { mix } from '../math/MathNode.js';
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import { anisotropy, anisotropyB, roughness } from '../core/PropertyNode.js';
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import { positionViewDirection } from './PositionNode.js';
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export const TBNViewMatrix = mat3( tangentView, bitangentView, normalView );
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export const parallaxDirection = positionViewDirection.mul( TBNViewMatrix )/*.normalize()*/;
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export const parallaxUV = ( uv, scale ) => uv.sub( parallaxDirection.mul( scale ) );
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export const transformedBentNormalView = ( () => {
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// https://google.github.io/filament/Filament.md.html#lighting/imagebasedlights/anisotropy
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let bentNormal = anisotropyB.cross( positionViewDirection );
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bentNormal = bentNormal.cross( anisotropyB ).normalize();
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bentNormal = mix( bentNormal, transformedNormalView, anisotropy.mul( roughness.oneMinus() ).oneMinus().pow2().pow2() ).normalize();
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return bentNormal;
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} )();
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