From eaca567a259a3d222fa75cfcab524dd027bdb15b Mon Sep 17 00:00:00 2001
From: Sean Lilley <lilleyse@gmail.com>
Date: Wed, 31 Oct 2018 20:47:52 -0400
Subject: [PATCH] Updates

---
 lib/createGltf.js | 52 +++++++++++++++++++++++++----------------------
 1 file changed, 28 insertions(+), 24 deletions(-)

diff --git a/lib/createGltf.js b/lib/createGltf.js
index 27e9b62..06a573d 100644
--- a/lib/createGltf.js
+++ b/lib/createGltf.js
@@ -199,7 +199,7 @@ function getTexture(gltf, texture) {
 }
 
 function cloneMaterial(material, removeTextures) {
-    if (material === null || typeof material !== 'object') {
+    if (typeof material !== 'object') {
         return material;
     } else if (material instanceof Texture) {
         if (removeTextures) {
@@ -236,7 +236,7 @@ function resolveTextures(gltf, material) {
     }
 }
 
-function addMaterial(gltf, material) {
+function addGltfMaterial(gltf, material) {
     resolveTextures(gltf, material);
     var materialIndex = gltf.materials.length;
     gltf.materials.push(material);
@@ -261,12 +261,12 @@ function getMaterialIndex(materials, materialName) {
     }
 }
 
-function getMaterial(gltf, materials, materialName) {
+function getOrCreateGltfMaterial(gltf, materials, materialName) {
     var material = getMaterialByName(materials, materialName);
     var materialIndex = getMaterialIndex(gltf.materials, materialName);
 
     if (!defined(materialIndex)) {
-        materialIndex = addMaterial(gltf, material);
+        materialIndex = addGltfMaterial(gltf, material);
     }
 
     return materialIndex;
@@ -277,6 +277,18 @@ function primitiveInfoMatch(a, b) {
            a.hasNormals === b.hasNormals;
 }
 
+function getSplitMaterialName(originalMaterialName, primitiveInfo, primitiveInfoByMaterial) {
+    var splitMaterialName = originalMaterialName;
+    var suffix = 2;
+    while (defined(primitiveInfoByMaterial[splitMaterialName])) {
+        if (primitiveInfoMatch(primitiveInfo, primitiveInfoByMaterial[splitMaterialName])) {
+            break;
+        }
+        splitMaterialName = originalMaterialName + '-' + suffix++;
+    }
+    return splitMaterialName;
+}
+
 function splitIncompatibleMaterials(nodes, materials, options) {
     var splitMaterials = [];
     var primitiveInfoByMaterial = {};
@@ -296,31 +308,23 @@ function splitIncompatibleMaterials(nodes, materials, options) {
                     hasNormals :  hasNormals
                 };
                 var originalMaterialName = defaultValue(primitive.material, 'default');
-                var materialName = originalMaterialName;
-                var suffix = 2;
-                while (defined(primitiveInfoByMaterial[materialName])) {
-                    if (primitiveInfoMatch(primitiveInfo, primitiveInfoByMaterial[materialName])) {
-                        break;
-                    }
-                    materialName = originalMaterialName + '-' + suffix++;
-                }
+                var splitMaterialName = getSplitMaterialName(originalMaterialName, primitiveInfo, primitiveInfoByMaterial);
+                primitive.material = splitMaterialName;
+                primitiveInfoByMaterial[splitMaterialName] = primitiveInfo;
 
-                primitive.material = materialName;
-                primitiveInfoByMaterial[materialName] = primitiveInfo;
-
-                var material = getMaterialByName(splitMaterials, materialName);
-                if (defined(material)) {
+                var splitMaterial = getMaterialByName(splitMaterials, splitMaterialName);
+                if (defined(splitMaterial)) {
                     continue;
                 }
 
-                material = getMaterialByName(materials, originalMaterialName);
-                if (defined(material)) {
-                    material = cloneMaterial(material, !hasUvs);
+                var originalMaterial = getMaterialByName(materials, originalMaterialName);
+                if (defined(originalMaterial)) {
+                    splitMaterial = cloneMaterial(originalMaterial, !hasUvs);
                 } else {
-                    material = getDefaultMaterial(options);
+                    splitMaterial = getDefaultMaterial(options);
                 }
-                material.name = materialName;
-                splitMaterials.push(material);
+                splitMaterial.name = splitMaterialName;
+                splitMaterials.push(splitMaterial);
             }
         }
     }
@@ -422,7 +426,7 @@ function addPrimitive(gltf, materials, bufferState, uint32Indices, mesh, primiti
     primitive.uvs = undefined;
     primitive.indices = undefined;
 
-    var materialIndex = getMaterial(gltf, materials, primitive.material);
+    var materialIndex = getOrCreateGltfMaterial(gltf, materials, primitive.material);
 
     return {
         attributes : attributes,