X-Git-Url: http://git.tdb.fi/?p=libs%2Fgl.git;a=blobdiff_plain;f=shaderlib%2Fcommon.glsl;h=35d5a87eafb8bf8c83e8fe877cdf5e90b0a3d724;hp=481d86c48a604bfe2b1622836a72aaee3a94ffe5;hb=0f256116c84a5b926bc923f5bbad95622933517a;hpb=e8f17d44584e6d9c47f91ff7570ef839ef866b7b

diff --git a/shaderlib/common.glsl b/shaderlib/common.glsl
index 481d86c4..35d5a87e 100644
--- a/shaderlib/common.glsl
+++ b/shaderlib/common.glsl
@@ -43,9 +43,12 @@ void standard_transform()
 	gl_Position = clip_eye_matrix*eye_vertex;
 
 	out vec3 world_normal = normal_tf*get_vertex_normal();
-	vec3 world_tangent = normal_tf*tangent;
-	vec3 world_binormal = cross(world_normal, world_tangent);
-	out mat3 world_tbn_matrix = mat3(world_tangent, world_binormal, world_normal);
+	if(use_normal_map)
+	{
+		vec3 world_tangent = normal_tf*tangent;
+		vec3 world_binormal = cross(world_normal, world_tangent);
+		out mat3 world_tbn_matrix = mat3(world_tangent, world_binormal, world_normal);
+	}
 
 	vec3 eye_pos = world_eye_matrix[3].xyz;
 	out vec3 world_look_dir = normalize(world_vertex.xyz-eye_pos);