Fix loaders' working path creation - Resolves #1282

Author: xawill

src/core/renderer/loaders/I3DMLoaderBase.js

@@ -90,7 +90,7 @@ export class I3DMLoaderBase extends LoaderBase {
 			//Store the gltf working path
 			const uriSplits = externalUri.split( /[\\/]/g );
 			uriSplits.pop();
-			gltfWorkingPath = uriSplits.join( '/' );
+			gltfWorkingPath = uriSplits.join( '/' ) + '/';
 
 			promise = fetch( externalUri, this.fetchOptions )
 				.then( res => {

src/core/renderer/loaders/LoaderBase.js

@@ -45,7 +45,7 @@ export class LoaderBase {
 
 		if ( /^[^\\/]/.test( url ) && ! /^http/.test( url ) ) {
 
-			return this.workingPath + '/' + url;
+			return new URL( url, this.workingPath ).href;
 
 		} else {
 

src/three/renderer/tiles/TilesRenderer.js

@@ -573,7 +573,7 @@ export class TilesRenderer extends TilesRendererBase {
 		const cached = tile.cached;
 		const uriSplits = uri.split( /[\\/]/g );
 		uriSplits.pop();
-		const workingPath = uriSplits.join( '/' );
+		const workingPath = uriSplits.join( '/' ) + '/';
 		const fetchOptions = this.fetchOptions;
 
 		const manager = this.manager;