mapping but it's normal

src/main/resources/lit.vert.glsl

@@ -7,6 +7,12 @@ uniform mat3 u_normalMatrix;
 varying vec3 v_normal;
 #endif // normalFlag
 
+#if defined(tangentFlag) && defined(binormalFlag)
+attribute vec3 a_tangent;
+attribute vec3 a_binormal;
+varying mat3 v_tbn;
+#endif // tangentFlag && bitangentFlag
+
 #ifdef colorFlag
 varying vec4 v_color;
 attribute vec4 a_color;
@@ -27,17 +33,22 @@ attribute vec2 a_texCoord0;
 #ifdef diffuseTextureFlag
 uniform vec4 u_diffuseUVTransform;
 varying vec2 v_diffuseUV;
-#endif
+#endif // diffuseTextureFlag
+
+#ifdef normalTextureFlag
+uniform vec4 u_normalUVTransform;
+varying vec2 v_normalUV;
+#endif // normalTextureFlag
 
 #ifdef emissiveTextureFlag
 uniform vec4 u_emissiveUVTransform;
 varying vec2 v_emissiveUV;
-#endif
+#endif // emissiveTextureFlag
 
 #ifdef specularTextureFlag
 uniform vec4 u_specularUVTransform;
 varying vec2 v_specularUV;
-#endif
+#endif // specularTextureFlag
 
 uniform mat4 u_worldTrans;
 
@@ -74,9 +85,15 @@ varying vec4 v_worldPosition;
 void main()
 {
 #ifdef normalFlag
-	//vec3 normal = u_normalMatrix * a_normal;
+	//vec3 normal = (transpose(inverse(u_normalMatrix)) * a_normal);
 	vec3 normal = normalize(u_normalMatrix * a_normal);
 	v_normal = normal;
+
+#if defined(tangentFlag) && defined(binormalFlag)
+	vec3 tangent = normalize(u_normalMatrix * a_tangent);
+	vec3 bitangent = normalize(u_normalMatrix * a_binormal);
+	v_tbn = mat3(tangent, bitangent, normal);
+#endif // tangentFlag && bitangentFlag
 #endif // normalFlag
 
 #ifdef colorFlag
@@ -87,6 +104,10 @@ void main()
 	v_diffuseUV = u_diffuseUVTransform.xy + a_texCoord0 * u_diffuseUVTransform.zw;
 #endif // diffuseTextureFlag
 
+#ifdef normalTextureFlag
+	v_normalUV = u_normalUVTransform.xy + a_texCoord0 * u_normalUVTransform.zw;
+#endif // normalTextureFlag
+
 #ifdef emissiveTextureFlag
 	v_emissiveUV = u_emissiveUVTransform.xy + a_texCoord0 * u_emissiveUVTransform.zw;
 #endif // emissiveTextureFlag