Reset vertex count properly

CHANGES.md

@@ -1,6 +1,10 @@
 Change Log
 ==========
 
+### 2.3.1 2018-10-11
+
+* Fixed handling of objs with interleaved materials. [#155](https://github.com/AnalyticalGraphicsInc/obj2gltf/pull/155)
+
 ### 2.3.0 2018-09-19
 
 * Fixed handling of objs with mismatching attribute layouts. [#153](https://github.com/AnalyticalGraphicsInc/obj2gltf/pull/153)

lib/loadObj.js

@@ -135,6 +135,7 @@ function loadObj(objPath, options) {
         for (var i = 0; i < primitivesLength; ++i) {
             if (primitives[i].material === material) {
                 primitive = primitives[i];
+                vertexCount = primitive.positions.length / 3;
                 return;
             }
         }

package.json

@@ -1,6 +1,6 @@
 {
   "name": "obj2gltf",
-  "version": "2.3.0",
+  "version": "2.3.1",
   "description": "Convert OBJ model format to glTF",
   "license": "Apache-2.0",
   "contributors": [

specs/lib/loadObjSpec.js

@@ -309,6 +309,14 @@ describe('loadObj', function() {
                 expect(primitives[0].material).toBe('Red');
                 expect(primitives[1].material).toBe('Green');
                 expect(primitives[2].material).toBe('Blue');
+
+                var expectedIndices = [0, 1, 2, 0, 2, 3, 4, 5, 6, 4, 6, 7];
+                var length = expectedIndices.length;
+                for (var i = 0; i < 3; ++i) {
+                    for (var j = 0; j < length; ++j) {
+                        expect(primitives[i].indices.get(j)).toBe(expectedIndices[j]);
+                    }
+                }
             }), done).toResolve();
     });