Load mtllib that has spaces in its path

lib/loadObj.js

@@ -437,8 +437,8 @@ function loadObj(objPath, options) {
             var materialName = line.substring(7).trim();
             useMaterial(materialName);
         } else if (/^mtllib/i.test(line)) {
-            var paths = line.substring(7).trim().split(' ');
-            mtlPaths = mtlPaths.concat(paths);
+            var mtllibLine = line.substring(7).trim();
+            mtlPaths = mtlPaths.concat(getMtlPaths(mtllibLine));
         } else if ((result = vertexPattern.exec(line)) !== null) {
             positions.push(parseFloat(result[1]));
             positions.push(parseFloat(result[2]));
@@ -495,6 +495,23 @@ function loadObj(objPath, options) {
         });
 }
 
+function getMtlPaths(mtllibLine) {
+    // Handle paths with spaces. E.g. mtllib my material file.mtl
+    var mtlPaths = [];
+    var splits = mtllibLine.split(' ');
+    var length = splits.length;
+    var startIndex = 0;
+    for (var i = 0; i < length; ++i) {
+        if (path.extname(splits[i]) === '') {
+            continue;
+        }
+        var mtlPath = splits.slice(startIndex, i + 1).join(' ');
+        mtlPaths.push(mtlPath);
+        startIndex = i + 1;
+    }
+    return mtlPaths;
+}
+
 function finishLoading(nodes, mtlPaths, objPath, options) {
     nodes = cleanNodes(nodes);
     if (nodes.length === 0) {

specs/data/box-mtllib-spaces/box mtllib blue.mtl

@@ -0,0 +1,12 @@
+# Blender MTL File: 'box-multiple-materials.blend'
+# Material Count: 1
+
+newmtl Blue
+Ns 96.078431
+Ka 0.000000 0.000000 0.000000
+Kd 0.000000 0.000000 0.640000
+Ks 0.500000 0.500000 0.500000
+Ke 0.000000 0.000000 0.000000
+Ni 1.000000
+d 1.000000
+illum 2

specs/data/box-mtllib-spaces/box mtllib green.mtl

@@ -0,0 +1,12 @@
+# Blender MTL File: 'box-multiple-materials.blend'
+# Material Count: 1
+
+newmtl Green
+Ns 96.078431
+Ka 0.000000 0.000000 0.000000
+Kd 0.000000 0.640000 0.000000
+Ks 0.500000 0.500000 0.500000
+Ke 0.000000 0.000000 0.000000
+Ni 1.000000
+d 1.000000
+illum 2

specs/data/box-mtllib-spaces/box mtllib red.mtl

@@ -0,0 +1,12 @@
+# Blender MTL File: 'box-multiple-materials.blend'
+# Material Count: 1
+
+newmtl Red
+Ns 96.078431
+Ka 0.000000 0.000000 0.000000
+Kd 0.640000 0.000000 0.000000
+Ks 0.500000 0.500000 0.500000
+Ke 0.000000 0.000000 0.000000
+Ni 1.000000
+d 1.000000
+illum 2

specs/data/box-mtllib-spaces/box mtllib.obj

@@ -0,0 +1,50 @@
+# Blender v2.78 (sub 0) OBJ File: 'box-multiple-materials.blend'
+# www.blender.org
+mtllib box mtllib red.mtl
+mtllib box mtllib green.mtl box mtllib blue.mtl 
+v -1.000000 -1.000000 1.000000
+v -1.000000 1.000000 1.000000
+v -1.000000 -1.000000 -1.000000
+v -1.000000 1.000000 -1.000000
+v 1.000000 -1.000000 1.000000
+v 1.000000 1.000000 1.000000
+v 1.000000 -1.000000 -1.000000
+v 1.000000 1.000000 -1.000000
+vt 0.0000 0.0000
+vt 1.0000 0.0000
+vt 1.0000 1.0000
+vt 0.0000 1.0000
+vt 0.0000 0.0000
+vt 1.0000 0.0000
+vt 1.0000 1.0000
+vt 0.0000 1.0000
+vt 0.0000 0.0000
+vt 1.0000 0.0000
+vt 1.0000 1.0000
+vt 0.0000 1.0000
+vt 0.0000 0.0000
+vt 1.0000 0.0000
+vt 1.0000 1.0000
+vt 0.0000 1.0000
+vt 1.0000 1.0000
+vt 0.0000 1.0000
+vt 0.0000 0.0000
+vt 1.0000 0.0000
+vn 0.0000 -1.0000 0.0000
+vn 0.0000 1.0000 0.0000
+vn -1.0000 0.0000 0.0000
+vn 1.0000 0.0000 0.0000
+vn 0.0000 0.0000 -1.0000
+vn 0.0000 0.0000 1.0000
+usemtl Red
+f 3/1/1 7/2/1 5/3/1 1/4/1
+usemtl Green
+f 1/9/3 2/10/3 4/11/3 3/12/3
+usemtl Blue
+f 3/1/5 4/6/5 8/17/5 7/18/5
+usemtl Red
+f 8/5/2 4/6/2 2/7/2 6/8/2
+usemtl Green
+f 7/13/4 8/14/4 6/15/4 5/16/4
+usemtl Blue
+f 5/19/6 6/20/6 2/7/6 1/4/6

specs/lib/loadObjSpec.js

@@ -21,6 +21,7 @@ var objNoMaterialsPath = 'specs/data/box-no-materials/box-no-materials.obj';
 var objMultipleMaterialsPath = 'specs/data/box-multiple-materials/box-multiple-materials.obj';
 var objUncleanedPath = 'specs/data/box-uncleaned/box-uncleaned.obj';
 var objMtllibPath = 'specs/data/box-mtllib/box-mtllib.obj';
+var objMtllibSpacesPath = 'specs/data/box-mtllib-spaces/box mtllib.obj';
 var objMissingMtllibPath = 'specs/data/box-missing-mtllib/box-missing-mtllib.obj';
 var objExternalResourcesPath = 'specs/data/box-external-resources/box-external-resources.obj';
 var objTexturedPath = 'specs/data/box-textured/box-textured.obj';
@@ -289,6 +290,26 @@ describe('loadObj', function() {
             }), done).toResolve();
     });
 
+    it('loads obj with mtllib paths with spaces', function(done) {
+        expect(loadObj(objMtllibSpacesPath, options)
+            .then(function(data) {
+                var materials = data.materials;
+                expect(materials.length).toBe(3);
+
+                // .mtl files are loaded in an arbitrary order, so sort for testing purposes
+                materials.sort(function(a, b){
+                    return a.name.localeCompare(b.name);
+                });
+
+                expect(materials[0].name).toBe('Blue');
+                expect(materials[0].pbrMetallicRoughness.baseColorFactor).toEqual([0.0, 0.0, 0.64, 1.0]);
+                expect(materials[1].name).toBe('Green');
+                expect(materials[1].pbrMetallicRoughness.baseColorFactor).toEqual([0.0, 0.64, 0.0, 1.0]);
+                expect(materials[2].name).toBe('Red');
+                expect(materials[2].pbrMetallicRoughness.baseColorFactor).toEqual([0.64, 0.0, 0.0, 1.0]);
+            }), done).toResolve();
+    });
+
     it('loads obj with missing mtllib', function(done) {
         var spy = jasmine.createSpy('logger');
         options.logger = spy;