Improve normal maps on ground and walls

shader/wall/texture.frag

@@ -3,13 +3,24 @@ layout (location=0) out vec4 fCol;
 layout (location=1) out vec4 fPos;
 layout (location=2) out vec4 fNorm;
 in vec2 tPos;
+in vec3 gTexCoords;
 in vec4 gPos;
 in vec4 gNorm;
 in vec4 gColor;
-uniform sampler2D tex;
+in float gRot;
+layout (binding=1) uniform sampler2DArray normalSampler;
+layout (binding=2) uniform sampler2DArray diffuseSampler;
+vec2 rotateV2 (float a, vec2 v)
+{
+    return vec2(v.x*cos(a) - v.y*sin(a), v.x*sin(a) + v.y*cos(a));
+}
 void main()
 {
-  fCol = gColor * texture(tex,tPos);
+  //fCol = gColor * texture(tex,tPos);
+  fCol = texture(diffuseSampler,gTexCoords);
   fPos = gPos;
-  fNorm = gNorm;
+  vec4 basenorm = texture(normalSampler,gTexCoords) - 0.5;
+  //fNorm = fPos - vec4(rotateV2(gRot,basenorm.xz), basenorm.y,0);
+  vec2 n = rotateV2(gRot,vec2(-basenorm.x,-basenorm.z));
+  fNorm = vec4(fPos.xyz - vec3(n,basenorm.y),0);
 }