first app vibe

app/node_modules/three/examples/jsm/tsl/display/hashBlur.js

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+import { float, Fn, vec2, uv, sin, rand, degrees, cos, Loop, vec4, premultiplyAlpha, unpremultiplyAlpha } from 'three/tsl';
+
+/**
+ * Applies a hash blur effect to the given texture node.
+ *
+ * Reference: {@link https://www.shadertoy.com/view/4lXXWn}.
+ *
+ * @function
+ * @param {Node<vec4>} textureNode - The texture node that should be blurred.
+ * @param {Node<float>} [bluramount=float(0.1)] - This node determines the amount of blur.
+ * @param {Object} [options={}] - Additional options for the hash blur effect.
+ * @param {Node<float>} [options.repeats=float(45)] - The number of iterations for the blur effect.
+ * @param {Node<vec4>} [options.mask=null] - A mask node to control the alpha blending of the blur.
+ * @param {boolean} [options.premultipliedAlpha=false] - Whether to use premultiplied alpha for the blur effect.
+ * @return {Node<vec4>} The blurred texture node.
+ */
+export const hashBlur = /*#__PURE__*/ Fn( ( [ textureNode, bluramount = float( 0.1 ), options = {} ] ) => {
+
+	const {
+		repeats = float( 45 ),
+		mask = null,
+		premultipliedAlpha = false
+	} = options;
+
+	const draw = ( uv ) => {
+
+		let sample = textureNode.sample( uv );
+
+		if ( mask !== null ) {
+
+			const alpha = mask.sample( uv ).x;
+
+			sample = vec4( sample.rgb, sample.a.mul( alpha ) );
+
+		}
+
+		return premultipliedAlpha ? premultiplyAlpha( sample ) : sample;
+
+	};
+
+	const targetUV = textureNode.uvNode || uv();
+	const blurred_image = vec4( 0. ).toVar();
+
+	Loop( { start: 0., end: repeats, type: 'float' }, ( { i } ) => {
+
+		const q = vec2( vec2( cos( degrees( i.div( repeats ).mul( 360. ) ) ), sin( degrees( i.div( repeats ).mul( 360. ) ) ) ).mul( rand( vec2( i, targetUV.x.add( targetUV.y ) ) ).add( bluramount ) ) );
+		const uv2 = vec2( targetUV.add( q.mul( bluramount ) ) );
+		blurred_image.addAssign( draw( uv2 ) );
+
+	} );
+
+	blurred_image.divAssign( repeats );
+
+	return premultipliedAlpha ? unpremultiplyAlpha( blurred_image ) : blurred_image;
+
+} );