WebGLRenderer: renderBufferImmediate clean up.

src/renderers/WebGLRenderer.js

@@ -692,44 +692,27 @@ THREE.WebGLRenderer = function ( parameters ) {
 
 			_gl.bindBuffer( _gl.ARRAY_BUFFER, buffers.normal );
 
-			if ( material instanceof THREE.MeshPhongMaterial === false && material.shading === THREE.FlatShading ) {
+			if ( material.type !== 'MeshPhongMaterial' && material.shading === THREE.FlatShading ) {
 
-				var nx, ny, nz,
-					nax, nbx, ncx, nay, nby, ncy, naz, nbz, ncz,
-					normalArray,
-					i, il = object.count * 3;
+				for ( var i = 0, l = object.count * 3; i < l; i += 9 ) {
 
-				for ( i = 0; i < il; i += 9 ) {
+					var array = object.normalArray;
 
-					normalArray = object.normalArray;
+					var nx = ( array[ i + 0 ] + array[ i + 3 ] + array[ i + 6 ] ) / 3;
+					var ny = ( array[ i + 1 ] + array[ i + 4 ] + array[ i + 7 ] ) / 3;
+					var nz = ( array[ i + 2 ] + array[ i + 5 ] + array[ i + 8 ] ) / 3;
 
-					nax = normalArray[ i ];
-					nay = normalArray[ i + 1 ];
-					naz = normalArray[ i + 2 ];
+					array[ i + 0 ] = nx;
+					array[ i + 1 ] = ny;
+					array[ i + 2 ] = nz;
 
-					nbx = normalArray[ i + 3 ];
-					nby = normalArray[ i + 4 ];
-					nbz = normalArray[ i + 5 ];
+					array[ i + 3 ] = nx;
+					array[ i + 4 ] = ny;
+					array[ i + 5 ] = nz;
 
-					ncx = normalArray[ i + 6 ];
-					ncy = normalArray[ i + 7 ];
-					ncz = normalArray[ i + 8 ];
-
-					nx = ( nax + nbx + ncx ) / 3;
-					ny = ( nay + nby + ncy ) / 3;
-					nz = ( naz + nbz + ncz ) / 3;
-
-					normalArray[ i ] = nx;
-					normalArray[ i + 1 ] = ny;
-					normalArray[ i + 2 ] = nz;
-
-					normalArray[ i + 3 ] = nx;
-					normalArray[ i + 4 ] = ny;
-					normalArray[ i + 5 ] = nz;
-
-					normalArray[ i + 6 ] = nx;
-					normalArray[ i + 7 ] = ny;
-					normalArray[ i + 8 ] = nz;
+					array[ i + 6 ] = nx;
+					array[ i + 7 ] = ny;
+					array[ i + 8 ] = nz;
 
 				}