154 lines
3.1 KiB
JavaScript
154 lines
3.1 KiB
JavaScript
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// https://wwwimages2.adobe.com/content/dam/acom/en/products/speedgrade/cc/pdfs/cube-lut-specification-1.0.pdf
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import {
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ClampToEdgeWrapping,
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Data3DTexture,
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FileLoader,
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FloatType,
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LinearFilter,
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Loader,
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UnsignedByteType,
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Vector3,
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} from 'three';
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export class LUTCubeLoader extends Loader {
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constructor( manager ) {
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super( manager );
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this.type = UnsignedByteType;
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}
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setType( type ) {
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if ( type !== UnsignedByteType && type !== FloatType ) {
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throw new Error( 'LUTCubeLoader: Unsupported type' );
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}
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this.type = type;
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return this;
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}
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load( url, onLoad, onProgress, onError ) {
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const loader = new FileLoader( this.manager );
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loader.setPath( this.path );
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loader.setResponseType( 'text' );
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loader.load( url, text => {
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try {
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onLoad( this.parse( text ) );
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} catch ( e ) {
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if ( onError ) {
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onError( e );
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} else {
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console.error( e );
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}
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this.manager.itemError( url );
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}
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}, onProgress, onError );
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}
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parse( input ) {
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const regExpTitle = /TITLE +"([^"]*)"/;
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const regExpSize = /LUT_3D_SIZE +(\d+)/;
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const regExpDomainMin = /DOMAIN_MIN +([\d.]+) +([\d.]+) +([\d.]+)/;
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const regExpDomainMax = /DOMAIN_MAX +([\d.]+) +([\d.]+) +([\d.]+)/;
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const regExpDataPoints = /^([\d.e+-]+) +([\d.e+-]+) +([\d.e+-]+) *$/gm;
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let result = regExpTitle.exec( input );
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const title = ( result !== null ) ? result[ 1 ] : null;
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result = regExpSize.exec( input );
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if ( result === null ) {
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throw new Error( 'LUTCubeLoader: Missing LUT_3D_SIZE information' );
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}
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const size = Number( result[ 1 ] );
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const length = size ** 3 * 4;
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const data = this.type === UnsignedByteType ? new Uint8Array( length ) : new Float32Array( length );
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const domainMin = new Vector3( 0, 0, 0 );
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const domainMax = new Vector3( 1, 1, 1 );
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result = regExpDomainMin.exec( input );
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if ( result !== null ) {
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domainMin.set( Number( result[ 1 ] ), Number( result[ 2 ] ), Number( result[ 3 ] ) );
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}
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result = regExpDomainMax.exec( input );
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if ( result !== null ) {
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domainMax.set( Number( result[ 1 ] ), Number( result[ 2 ] ), Number( result[ 3 ] ) );
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}
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if ( domainMin.x > domainMax.x || domainMin.y > domainMax.y || domainMin.z > domainMax.z ) {
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throw new Error( 'LUTCubeLoader: Invalid input domain' );
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}
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const scale = this.type === UnsignedByteType ? 255 : 1;
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let i = 0;
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while ( ( result = regExpDataPoints.exec( input ) ) !== null ) {
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data[ i ++ ] = Number( result[ 1 ] ) * scale;
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data[ i ++ ] = Number( result[ 2 ] ) * scale;
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data[ i ++ ] = Number( result[ 3 ] ) * scale;
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data[ i ++ ] = scale;
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}
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const texture3D = new Data3DTexture();
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texture3D.image.data = data;
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texture3D.image.width = size;
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texture3D.image.height = size;
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texture3D.image.depth = size;
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texture3D.type = this.type;
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texture3D.magFilter = LinearFilter;
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texture3D.minFilter = LinearFilter;
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texture3D.wrapS = ClampToEdgeWrapping;
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texture3D.wrapT = ClampToEdgeWrapping;
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texture3D.wrapR = ClampToEdgeWrapping;
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texture3D.generateMipmaps = false;
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texture3D.needsUpdate = true;
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return {
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title,
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size,
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domainMin,
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domainMax,
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texture3D,
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};
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}
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}
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