Fix shader error in anisotropy when normal map is missing (#26334)

* Fix shader error in physical material anisotropy when normal map is not present.

* Check for USE_ANISOTROPY in uv_pars_vertex.glsl.js

src/renderers/shaders/ShaderChunk/normal_fragment_begin.glsl.js

@@ -27,7 +27,15 @@ float faceDirection = gl_FrontFacing ? 1.0 : - 1.0;
 
 	#else
 
-		mat3 tbn = getTangentFrame( - vViewPosition, normal, vNormalMapUv );
+		mat3 tbn = getTangentFrame( - vViewPosition, normal,
+		#if defined( USE_NORMALMAP )
+			vNormalMapUv
+		#elif defined( USE_CLEARCOAT_NORMALMAP )
+			vClearcoatNormalMapUv
+		#else
+			vUv
+		#endif
+		);
 
 	#endif
 

src/renderers/shaders/ShaderChunk/uv_pars_fragment.glsl.js

@@ -1,5 +1,5 @@
 export default /* glsl */`
-#ifdef USE_UV
+#if defined( USE_UV ) || defined( USE_ANISOTROPY )
 
 	varying vec2 vUv;
 

src/renderers/shaders/ShaderChunk/uv_pars_vertex.glsl.js

@@ -1,5 +1,5 @@
 export default /* glsl */`
-#ifdef USE_UV
+#if defined( USE_UV ) || defined( USE_ANISOTROPY )
 
 	varying vec2 vUv;
 

src/renderers/shaders/ShaderChunk/uv_vertex.glsl.js

@@ -1,5 +1,5 @@
 export default /* glsl */`
-#ifdef USE_UV
+#if defined( USE_UV ) || defined( USE_ANISOTROPY )
 
 	vUv = vec3( uv, 1 ).xy;