TSL: Move EquirectUVNode to equirectUV() Fn

src/nodes/Nodes.js

@@ -41,7 +41,6 @@ export { NodeUtils };
 // utils
 export { default as ArrayElementNode } from './utils/ArrayElementNode.js';
 export { default as ConvertNode } from './utils/ConvertNode.js';
-export { default as EquirectUVNode } from './utils/EquirectUVNode.js';
 export { default as FunctionOverloadingNode } from './utils/FunctionOverloadingNode.js';
 export { default as JoinNode } from './utils/JoinNode.js';
 export { default as LoopNode } from './utils/LoopNode.js';

src/nodes/TSL.js

@@ -24,7 +24,7 @@ export * from './math/MathUtils.js';
 export * from './math/TriNoise3D.js';
 
 // utils
-export * from './utils/EquirectUVNode.js';
+export * from './utils/EquirectUV.js';
 export * from './utils/FunctionOverloadingNode.js';
 export * from './utils/LoopNode.js';
 export * from './utils/MatcapUVNode.js';

src/nodes/utils/EquirectUV.js

@@ -0,0 +1,27 @@
+import { positionWorldDirection } from '../accessors/Position.js';
+import { Fn, vec2 } from '../tsl/TSLBase.js';
+
+/**
+ * TSL function for creating an equirect uv node.
+ *
+ * Can be used to compute texture coordinates for projecting an
+ * equirectangular texture onto a mesh for using it as the scene's
+ * background.
+ *
+ * ```js
+ * scene.backgroundNode = texture( equirectTexture, equirectUV() );
+ * ```
+ *
+ * @tsl
+ * @function
+ * @param {?Node<vec3>} [dirNode=positionWorldDirection] - A direction vector for sampling which is by default `positionWorldDirection`.
+ * @returns {Node<vec2>}
+ */
+export const equirectUV = /*@__PURE__*/ Fn( ( [ dir = positionWorldDirection ] ) => {
+
+	const u = dir.z.atan( 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 );
+
+} );

src/renderers/common/CubeRenderTarget.js

@@ -1,4 +1,4 @@
-import { equirectUV } from '../../nodes/utils/EquirectUVNode.js';
+import { equirectUV } from '../../nodes/utils/EquirectUV.js';
 import { texture as TSL_Texture } from '../../nodes/accessors/TextureNode.js';
 import { positionWorldDirection } from '../../nodes/accessors/Position.js';
 import NodeMaterial from '../../materials/nodes/NodeMaterial.js';

src/renderers/common/extras/PMREMGenerator.js

@@ -1,6 +1,6 @@
 import NodeMaterial from '../../../materials/nodes/NodeMaterial.js';
 import { getDirection, blur } from '../../../nodes/pmrem/PMREMUtils.js';
-import { equirectUV } from '../../../nodes/utils/EquirectUVNode.js';
+import { equirectUV } from '../../../nodes/utils/EquirectUV.js';
 import { uniform } from '../../../nodes/core/UniformNode.js';
 import { uniformArray } from '../../../nodes/accessors/UniformArrayNode.js';
 import { texture } from '../../../nodes/accessors/TextureNode.js';