first app vibe

app/node_modules/three/src/nodes/display/ViewportTextureNode.js

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+import TextureNode from '../accessors/TextureNode.js';
+import { NodeUpdateType } from '../core/constants.js';
+import { nodeProxy } from '../tsl/TSLBase.js';
+import { screenUV } from './ScreenNode.js';
+
+import { Vector2 } from '../../math/Vector2.js';
+import { FramebufferTexture } from '../../textures/FramebufferTexture.js';
+import { LinearMipmapLinearFilter } from '../../constants.js';
+
+const _size = /*@__PURE__*/ new Vector2();
+
+/**
+ * A special type of texture node which represents the data of the current viewport
+ * as a texture. The module extracts data from the current bound framebuffer with
+ * a copy operation so no extra render pass is required to produce the texture data
+ * (which is good for performance). `ViewportTextureNode` can be used as an input for a
+ * variety of effects like refractive or transmissive materials.
+ *
+ * @augments TextureNode
+ */
+class ViewportTextureNode extends TextureNode {
+
+	static get type() {
+
+		return 'ViewportTextureNode';
+
+	}
+
+	/**
+	 * Constructs a new viewport texture node.
+	 *
+	 * @param {Node} [uvNode=screenUV] - The uv node.
+	 * @param {?Node} [levelNode=null] - The level node.
+	 * @param {?Texture} [framebufferTexture=null] - A framebuffer texture holding the viewport data. If not provided, a framebuffer texture is created automatically.
+	 */
+	constructor( uvNode = screenUV, levelNode = null, framebufferTexture = null ) {
+
+		if ( framebufferTexture === null ) {
+
+			framebufferTexture = new FramebufferTexture();
+			framebufferTexture.minFilter = LinearMipmapLinearFilter;
+
+		}
+
+		super( framebufferTexture, uvNode, levelNode );
+
+		/**
+		 * Whether to generate mipmaps or not.
+		 *
+		 * @type {boolean}
+		 * @default false
+		 */
+		this.generateMipmaps = false;
+
+		/**
+		 * This flag can be used for type testing.
+		 *
+		 * @type {boolean}
+		 * @readonly
+		 * @default true
+		 */
+		this.isOutputTextureNode = true;
+
+		/**
+		 * The `updateBeforeType` is set to `NodeUpdateType.FRAME` since the node renders the
+		 * scene once per frame in its {@link ViewportTextureNode#updateBefore} method.
+		 *
+		 * @type {string}
+		 * @default 'frame'
+		 */
+		this.updateBeforeType = NodeUpdateType.FRAME;
+
+	}
+
+	updateBefore( frame ) {
+
+		const renderer = frame.renderer;
+		renderer.getDrawingBufferSize( _size );
+
+		//
+
+		const framebufferTexture = this.value;
+
+		if ( framebufferTexture.image.width !== _size.width || framebufferTexture.image.height !== _size.height ) {
+
+			framebufferTexture.image.width = _size.width;
+			framebufferTexture.image.height = _size.height;
+			framebufferTexture.needsUpdate = true;
+
+		}
+
+		//
+
+		const currentGenerateMipmaps = framebufferTexture.generateMipmaps;
+		framebufferTexture.generateMipmaps = this.generateMipmaps;
+
+		renderer.copyFramebufferToTexture( framebufferTexture );
+
+		framebufferTexture.generateMipmaps = currentGenerateMipmaps;
+
+	}
+
+	clone() {
+
+		const viewportTextureNode = new this.constructor( this.uvNode, this.levelNode, this.value );
+		viewportTextureNode.generateMipmaps = this.generateMipmaps;
+
+		return viewportTextureNode;
+
+	}
+
+}
+
+export default ViewportTextureNode;
+
+/**
+ * TSL function for creating a viewport texture node.
+ *
+ * @tsl
+ * @function
+ * @param {?Node} [uvNode=screenUV] - The uv node.
+ * @param {?Node} [levelNode=null] - The level node.
+ * @param {?Texture} [framebufferTexture=null] - A framebuffer texture holding the viewport data. If not provided, a framebuffer texture is created automatically.
+ * @returns {ViewportTextureNode}
+ */
+export const viewportTexture = /*@__PURE__*/ nodeProxy( ViewportTextureNode ).setParameterLength( 0, 3 );
+
+/**
+ * TSL function for creating a viewport texture node with enabled mipmap generation.
+ *
+ * @tsl
+ * @function
+ * @param {?Node} [uvNode=screenUV] - The uv node.
+ * @param {?Node} [levelNode=null] - The level node.
+ * @param {?Texture} [framebufferTexture=null] - A framebuffer texture holding the viewport data. If not provided, a framebuffer texture is created automatically.
+ * @returns {ViewportTextureNode}
+ */
+export const viewportMipTexture = /*@__PURE__*/ nodeProxy( ViewportTextureNode, null, null, { generateMipmaps: true } ).setParameterLength( 0, 3 );