Upgraded original RothenburgAR to Unity version 2017.4.5f1 (and upgrading from standalone vuforia to the version integrated in unity)

Assets/Vuforia/Shaders/CameraDiffuse.shader

@@ -0,0 +1,71 @@
+//========================================================================
+// Copyright (c) 2017 PTC Inc. All Rights Reserved.
+//
+// Vuforia is a trademark of PTC Inc., registered in the United States and other
+// countries.
+//=========================================================================
+
+Shader "Custom/CameraDiffuse"
+{   
+    Properties 
+    {
+        _MaterialColor ("Color", Color) = (1,1,1,1)
+    }
+
+    CGINCLUDE
+
+    uniform float4 _MaterialColor;
+
+    ENDCG
+
+    SubShader
+    {
+        Pass
+        {
+            // indicate that our pass is the "base" pass in forward
+            // rendering pipeline. It gets ambient and main directional
+            // light data set up; light direction in _WorldSpaceLightPos0
+            // and color in _LightColor0
+            Tags {"LightMode"="ForwardBase"}
+
+            CGPROGRAM
+            #pragma vertex vert
+            #pragma fragment frag
+            #include "UnityCG.cginc" // for UnityObjectToWorldNormal
+            #include "UnityLightingCommon.cginc" // for _LightColor0
+
+            struct v2f
+            {
+                fixed4 diff : COLOR0; // diffuse lighting color
+                float4 vertex : SV_POSITION;
+            };
+
+            v2f vert (appdata_base v)
+            {
+                v2f o;
+                o.vertex = UnityObjectToClipPos(v.vertex);
+
+
+                // get vertex normal in world space
+                half3 worldNormal = UnityObjectToWorldNormal(v.normal);
+                
+                float3 worldPos = mul(unity_ObjectToWorld, v.vertex).xyz;
+                // compute world space view direction
+                float3 worldViewDir = normalize(UnityWorldSpaceViewDir(worldPos));
+                // dot product between normal and light direction for
+                // standard diffuse (Lambert) lighting
+                half nl = max(0, dot(worldNormal, worldViewDir));
+                
+                // factor in the material color
+                o.diff = lerp(_MaterialColor, nl * _MaterialColor, 0.2);
+                return o;
+            }
+            
+            fixed4 frag (v2f i) : SV_Target
+            {
+                return i.diff;
+            }
+            ENDCG
+        }
+    }
+}