Merge pull request #14650 from 06wj/patch0

update logdepthbuf shader

src/renderers/shaders/ShaderChunk/logdepthbuf_pars_fragment.glsl

@@ -1,11 +1,6 @@
-#ifdef USE_LOGDEPTHBUF
+#if defined( USE_LOGDEPTHBUF ) && defined( USE_LOGDEPTHBUF_EXT )
 
 	uniform float logDepthBufFC;
-
-	#ifdef USE_LOGDEPTHBUF_EXT
-
-		varying float vFragDepth;
-
-	#endif
+	varying float vFragDepth;
 
 #endif

src/renderers/shaders/ShaderChunk/logdepthbuf_pars_vertex.glsl

@@ -4,8 +4,10 @@
 
 		varying float vFragDepth;
 
-	#endif
+	#else
+
+		uniform float logDepthBufFC;
 
-	uniform float logDepthBufFC;
+	#endif
 
-#endif
+#endif