preact

frontend/node_modules/three/examples/jsm/nodes/utils/EquirectUVNode.js

@@ -0,0 +1,33 @@
+import TempNode from '../core/TempNode.js';
+import { positionWorldDirection } from '../accessors/PositionNode.js';
+import { nodeProxy, vec2 } from '../shadernode/ShaderNode.js';
+import { addNodeClass } from '../core/Node.js';
+
+class EquirectUVNode extends TempNode {
+
+	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 = nodeProxy( EquirectUVNode );
+
+addNodeClass( 'EquirectUVNode', EquirectUVNode );