添加关照、全局等高线、修改图层问题

static/sdk/three/jsm/nodes/functions/BSDF/DFGApprox.js

@@ -0,0 +1,30 @@
+import { tslFn, vec2, vec4 } from '../../shadernode/ShaderNode.js';
+
+// Analytical approximation of the DFG LUT, one half of the
+// split-sum approximation used in indirect specular lighting.
+// via 'environmentBRDF' from "Physically Based Shading on Mobile"
+// https://www.unrealengine.com/blog/physically-based-shading-on-mobile
+const DFGApprox = tslFn( ( { roughness, dotNV } ) => {
+
+	const c0 = vec4( - 1, - 0.0275, - 0.572, 0.022 );
+
+	const c1 = vec4( 1, 0.0425, 1.04, - 0.04 );
+
+	const r = roughness.mul( c0 ).add( c1 );
+
+	const a004 = r.x.mul( r.x ).min( dotNV.mul( - 9.28 ).exp2() ).mul( r.x ).add( r.y );
+
+	const fab = vec2( - 1.04, 1.04 ).mul( a004 ).add( r.zw );
+
+	return fab;
+
+} ).setLayout( {
+	name: 'DFGApprox',
+	type: 'vec2',
+	inputs: [
+		{ name: 'roughness', type: 'float' },
+		{ name: 'dotNV', type: 'vec3' }
+	]
+} );
+
+export default DFGApprox;