add Potree (version 1.8)

PointCloudWeb.Web/public/Potree/libs/three.js/loaders/LUT3dlLoader.js

@@ -0,0 +1,142 @@
+// http://download.autodesk.com/us/systemdocs/help/2011/lustre/index.html?url=./files/WSc4e151a45a3b785a24c3d9a411df9298473-7ffd.htm,topicNumber=d0e9492
+
+import {
+	Loader,
+	FileLoader,
+	DataTexture,
+	DataTexture3D,
+	RGBFormat,
+	UnsignedByteType,
+	ClampToEdgeWrapping,
+	LinearFilter,
+} from '../../../build/three.module.js';
+
+export class LUT3dlLoader extends Loader {
+
+	load( url, onLoad, onProgress, onError ) {
+
+		const loader = new FileLoader( this.manager );
+		loader.setPath( this.path );
+		loader.setResponseType( 'text' );
+		loader.load( url, text => {
+
+			try {
+
+				onLoad( this.parse( text ) );
+
+			} catch ( e ) {
+
+				if ( onError ) {
+
+					onError( e );
+
+				} else {
+
+					console.error( e );
+
+				}
+
+				this.manager.itemError( url );
+
+			}
+
+		}, onProgress, onError );
+
+	}
+
+	parse( str ) {
+
+		// remove empty lines and comment lints
+		str = str
+			.replace( /^#.*?(\n|\r)/gm, '' )
+			.replace( /^\s*?(\n|\r)/gm, '' )
+			.trim();
+
+		const lines = str.split( /[\n\r]+/g );
+
+		// first line is the positions on the grid that are provided by the LUT
+		const gridLines = lines[ 0 ].trim().split( /\s+/g ).map( e => parseFloat( e ) );
+		const gridStep = gridLines[ 1 ] - gridLines[ 0 ];
+		const size = gridLines.length;
+
+		for ( let i = 1, l = gridLines.length; i < l; i ++ ) {
+
+			if ( gridStep !== ( gridLines[ i ] - gridLines[ i - 1 ] ) ) {
+
+				throw new Error( 'LUT3dlLoader: Inconsistent grid size not supported.' );
+
+			}
+
+		}
+
+		const dataArray = new Array( size * size * size * 3 );
+		let index = 0;
+		let maxOutputValue = 0.0;
+		for ( let i = 1, l = lines.length; i < l; i ++ ) {
+
+			const line = lines[ i ].trim();
+			const split = line.split( /\s/g );
+
+			const r = parseFloat( split[ 0 ] );
+			const g = parseFloat( split[ 1 ] );
+			const b = parseFloat( split[ 2 ] );
+			maxOutputValue = Math.max( maxOutputValue, r, g, b );
+
+			const bLayer = index % size;
+			const gLayer = Math.floor( index / size ) % size;
+			const rLayer = Math.floor( index / ( size * size ) ) % size;
+
+			// b grows first, then g, then r
+			const pixelIndex = bLayer * size * size + gLayer * size + rLayer;
+			dataArray[ 3 * pixelIndex + 0 ] = r;
+			dataArray[ 3 * pixelIndex + 1 ] = g;
+			dataArray[ 3 * pixelIndex + 2 ] = b;
+			index += 1;
+
+		}
+
+		// Find the apparent bit depth of the stored RGB values and scale the
+		// values to [ 0, 255 ].
+		const bits = Math.ceil( Math.log2( maxOutputValue ) );
+		const maxBitValue = Math.pow( 2.0, bits );
+		for ( let i = 0, l = dataArray.length; i < l; i ++ ) {
+
+			const val = dataArray[ i ];
+			dataArray[ i ] = 255 * val / maxBitValue;
+
+		}
+
+		const data = new Uint8Array( dataArray );
+		const texture = new DataTexture();
+		texture.image.data = data;
+		texture.image.width = size;
+		texture.image.height = size * size;
+		texture.format = RGBFormat;
+		texture.type = UnsignedByteType;
+		texture.magFilter = LinearFilter;
+		texture.wrapS = ClampToEdgeWrapping;
+		texture.wrapT = ClampToEdgeWrapping;
+		texture.generateMipmaps = false;
+
+		const texture3D = new DataTexture3D();
+		texture3D.image.data = data;
+		texture3D.image.width = size;
+		texture3D.image.height = size;
+		texture3D.image.depth = size;
+		texture3D.format = RGBFormat;
+		texture3D.type = UnsignedByteType;
+		texture3D.magFilter = LinearFilter;
+		texture3D.wrapS = ClampToEdgeWrapping;
+		texture3D.wrapT = ClampToEdgeWrapping;
+		texture3D.wrapR = ClampToEdgeWrapping;
+		texture3D.generateMipmaps = false;
+
+		return {
+			size,
+			texture,
+			texture3D,
+		};
+
+	}
+
+}