26 lines
789 B
JavaScript
26 lines
789 B
JavaScript
import ShaderNode from '../shadernode/ShaderNode.js';
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import { add, max, min, abs, dFdx, dFdy, normalGeometry } from '../shadernode/ShaderNodeElements.js';
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export const getGeometryRoughness = new ShaderNode( () => {
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const dxy = max( abs( dFdx( normalGeometry ) ), abs( dFdy( normalGeometry ) ) );
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const geometryRoughness = max( max( dxy.x, dxy.y ), dxy.z );
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return geometryRoughness;
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} );
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export const getRoughness = new ShaderNode( ( inputs ) => {
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const { roughness } = inputs;
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const geometryRoughness = getGeometryRoughness();
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let roughnessFactor = max( roughness, 0.0525 ); // 0.0525 corresponds to the base mip of a 256 cubemap.
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roughnessFactor = add( roughnessFactor, geometryRoughness );
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roughnessFactor = min( roughnessFactor, 1.0 );
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return roughnessFactor;
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} );
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