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web-app/node_modules/three/src/nodes/utils/EquirectUVNode.js

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+import TempNode from '../core/TempNode.js';
+import { positionWorldDirection } from '../accessors/Position.js';
+import { nodeProxy, vec2 } from '../tsl/TSLBase.js';
+
+class EquirectUVNode extends TempNode {
+
+	static get type() {
+
+		return 'EquirectUVNode';
+
+	}
+
+	constructor( dirNode = positionWorldDirection ) {
+
+		super( 'vec2' );
+
+		this.dirNode = dirNode;
+
+	}
+
+	setup() {
+
+		const dir = this.dirNode;
+
+		const u = dir.z.atan2( dir.x ).mul( 1 / ( Math.PI * 2 ) ).add( 0.5 );
+		const v = dir.y.clamp( - 1.0, 1.0 ).asin().mul( 1 / Math.PI ).add( 0.5 );
+
+		return vec2( u, v );
+
+	}
+
+}
+
+export default EquirectUVNode;
+
+export const equirectUV = /*@__PURE__*/ nodeProxy( EquirectUVNode );