From 6894f50e5446ff0fac1f49b84c2c1c3a249aa9ed Mon Sep 17 00:00:00 2001
From: Takahiro <hogehoge@gachapin.jp>
Date: Wed, 17 Apr 2019 02:28:19 +0900
Subject: [PATCH] Revert "GLTFExporter: Fix export of multi-material meshes."

This reverts commit aa3243fa11fee0087260102590f95a143b537be7.
---
 examples/js/exporters/GLTFExporter.js | 6 ++----
 1 file changed, 2 insertions(+), 4 deletions(-)

diff --git a/examples/js/exporters/GLTFExporter.js b/examples/js/exporters/GLTFExporter.js
index d8d9eb3a2b..4be2647fd6 100644
--- a/examples/js/exporters/GLTFExporter.js
+++ b/examples/js/exporters/GLTFExporter.js
@@ -1358,16 +1358,14 @@ THREE.GLTFExporter.prototype = {
 
 				if ( geometry.index !== null ) {
 
-					var cacheKey = geometry.uuid + ':' + groups[ i ].start + ':' + groups[ i ].count;
-
-					if ( cachedData.attributes.has( cacheKey ) ) {
+					if ( cachedData.attributes.has( geometry.index ) ) {
 
 						primitive.indices = cachedData.attributes.get( geometry.index );
 
 					} else {
 
 						primitive.indices = processAccessor( geometry.index, geometry, groups[ i ].start, groups[ i ].count );
-						cachedData.attributes.set( cacheKey, primitive.indices );
+						cachedData.attributes.set( geometry.index, primitive.indices );
 
 					}
 
-- 
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