preact

frontend/node_modules/three/examples/jsm/nodes/lighting/IESSpotLightNode.js

@@ -0,0 +1,39 @@
+import SpotLightNode from './SpotLightNode.js';
+import { addLightNode } from './LightsNode.js';
+import { texture } from '../accessors/TextureNode.js';
+import { vec2 } from '../shadernode/ShaderNode.js';
+import { addNodeClass } from '../core/Node.js';
+
+import IESSpotLight from '../../lights/IESSpotLight.js';
+
+class IESSpotLightNode extends SpotLightNode {
+
+	getSpotAttenuation( angleCosine ) {
+
+		const iesMap = this.light.iesMap;
+
+		let spotAttenuation = null;
+
+		if ( iesMap && iesMap.isTexture === true ) {
+
+			const angle = angleCosine.acos().mul( 1.0 / Math.PI );
+
+			spotAttenuation = texture( iesMap, vec2( angle, 0 ), 0 ).r;
+
+		} else {
+
+			spotAttenuation = super.getSpotAttenuation( angleCosine );
+
+		}
+
+		return spotAttenuation;
+
+	}
+
+}
+
+export default IESSpotLightNode;
+
+addNodeClass( 'IESSpotLightNode', IESSpotLightNode );
+
+addLightNode( IESSpotLight, IESSpotLightNode );