X-Git-Url: http://git.tdb.fi/?a=blobdiff_plain;f=shaderlib%2Fcommon.glsl;h=7a57b0671eebf1a3b4850cb451785c66a52498ff;hb=139924448ef4753b3942da07091a2630a037c034;hp=481d86c48a604bfe2b1622836a72aaee3a94ffe5;hpb=caa1348f9478fcd834a1fdcbafed7cccf6b582e2;p=libs%2Fgl.git

diff --git a/shaderlib/common.glsl b/shaderlib/common.glsl
index 481d86c4..7a57b067 100644
--- a/shaderlib/common.glsl
+++ b/shaderlib/common.glsl
@@ -42,10 +42,13 @@ void standard_transform()
 	vec4 eye_vertex = eye_world_matrix*world_vertex;
 	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);
+	out vec3 world_normal = normalize(normal_tf*get_vertex_normal());
+	if(use_normal_map)
+	{
+		vec3 world_tangent = normalize(normal_tf*tangent);
+		vec3 world_binormal = normalize(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);