Pass the tangent in object space

files/shaders/objects_fragment.glsl

@@ -28,7 +28,7 @@ varying vec2 emissiveMapUV;
 #if @normalMap
 uniform sampler2D normalMap;
 varying vec2 normalMapUV;
-varying vec3 viewTangent;
+varying vec3 passTangent;
 #endif
 
 #if @envMap
@@ -52,7 +52,7 @@ varying vec4 lighting;
 varying vec4 passColor;
 #endif
 varying vec3 passViewPos;
-varying vec3 passViewNormal;
+varying vec3 passNormal;
 
 #include "lighting.glsl"
 
@@ -77,15 +77,17 @@ void main()
     gl_FragData[0].xyz = mix(gl_FragData[0].xyz, decalTex.xyz, decalTex.a);
 #endif
 
-    vec3 viewNormal = passViewNormal;
-
 #if @normalMap
     vec3 normalTex = texture2D(normalMap, normalMapUV).xyz;
 
-    vec3 viewBinormal = cross(viewTangent, viewNormal);
-    mat3 tbn = mat3(viewTangent, viewBinormal, viewNormal);
+    vec3 normalizedNormal = normalize(passNormal);
+    vec3 normalizedTangent = normalize(passTangent);
+    vec3 binormal = cross(normalizedTangent, normalizedNormal);
+    mat3 tbn = mat3(normalizedTangent, binormal, normalizedNormal);
 
-    viewNormal = normalize(tbn * (normalTex * 2.0 - 1.0));
+    vec3 viewNormal = gl_NormalMatrix * normalize(tbn * (normalTex * 2.0 - 1.0));
+#else
+    vec3 viewNormal = gl_NormalMatrix * normalize(passNormal);
 #endif
 
 

files/shaders/objects_vertex.glsl

@@ -22,7 +22,7 @@ varying vec2 emissiveMapUV;
 
 #if @normalMap
 varying vec2 normalMapUV;
-varying vec3 viewTangent;
+varying vec3 passTangent;
 #endif
 
 #if @envMap
@@ -43,7 +43,7 @@ varying vec4 lighting;
 varying vec4 passColor;
 #endif
 varying vec3 passViewPos;
-varying vec3 passViewNormal;
+varying vec3 passNormal;
 
 #include "lighting.glsl"
 
@@ -85,7 +85,7 @@ void main(void)
 
 #if @normalMap
     normalMapUV = (gl_TextureMatrix[@normalMapUV] * gl_MultiTexCoord@normalMapUV).xy;
-    viewTangent = normalize(gl_NormalMatrix * gl_MultiTexCoord7.xyz);
+    passTangent = gl_MultiTexCoord7.xyz;
 #endif
 
 #if @specularMap
@@ -98,5 +98,5 @@ void main(void)
     passColor = gl_Color;
 #endif
     passViewPos = viewPos.xyz;
-    passViewNormal = viewNormal;
+    passNormal = gl_Normal.xyz;
 }