three 基础库
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2 years ago
import {
BufferGeometry,
FileLoader,
Float32BufferAttribute,
Loader
} from '../../../build/three.module.js';
class XYZLoader extends Loader {
load( url, onLoad, onProgress, onError ) {
const scope = this;
const loader = new FileLoader( this.manager );
loader.setPath( this.path );
loader.setRequestHeader( this.requestHeader );
loader.setWithCredentials( this.withCredentials );
loader.load( url, function ( text ) {
try {
onLoad( scope.parse( text ) );
} catch ( e ) {
if ( onError ) {
onError( e );
} else {
console.error( e );
}
scope.manager.itemError( url );
}
}, onProgress, onError );
}
parse( text ) {
const lines = text.split( '\n' );
const vertices = [];
const colors = [];
for ( let line of lines ) {
line = line.trim();
if ( line.charAt( 0 ) === '#' ) continue; // skip comments
const lineValues = line.split( /\s+/ );
if ( lineValues.length === 3 ) {
// XYZ
vertices.push( parseFloat( lineValues[ 0 ] ) );
vertices.push( parseFloat( lineValues[ 1 ] ) );
vertices.push( parseFloat( lineValues[ 2 ] ) );
}
if ( lineValues.length === 6 ) {
// XYZRGB
vertices.push( parseFloat( lineValues[ 0 ] ) );
vertices.push( parseFloat( lineValues[ 1 ] ) );
vertices.push( parseFloat( lineValues[ 2 ] ) );
colors.push( parseFloat( lineValues[ 3 ] ) / 255 );
colors.push( parseFloat( lineValues[ 4 ] ) / 255 );
colors.push( parseFloat( lineValues[ 5 ] ) / 255 );
}
}
const geometry = new BufferGeometry();
geometry.setAttribute( 'position', new Float32BufferAttribute( vertices, 3 ) );
if ( colors.length > 0 ) {
geometry.setAttribute( 'color', new Float32BufferAttribute( colors, 3 ) );
}
return geometry;
}
}
export { XYZLoader };