Fix shader error when using non-ASCII characters in material

Source/Engine/Platform/Base/StringUtilsBase.cpp

@@ -88,6 +88,20 @@ const char* StringUtils::FindIgnoreCase(const char* str, const char* toFind)
     return nullptr;
 }
 
+void StringUtils::ConvertUTF162ASCII(const Char* from, char* to, int32 len)
+{
+    if (!from || !to)
+        return;
+    for (int32 i = 0; i < len; i++)
+    {
+        Char c = from[i];
+        if ((c == 0x09 || c == 0x0A || c == 0x0D || (0x20 <= c && c <= 0x7F)))
+            to[i] = (char)c;
+        else
+            to[i] = ' ';
+    }
+}
+
 void PrintUTF8Error(const char* from, uint32 fromLength)
 {
     LOG(Error, "Not a UTF-8 string. Length: {0}", fromLength);

Source/Engine/Platform/StringUtils.h

@@ -150,6 +150,9 @@ public:
     // Converts characters from UTF-16 to ANSI
     static void ConvertUTF162ANSI(const Char* from, char* to, int32 len);
 
+    // Converts characters from UTF-16 to ASCII
+    static void ConvertUTF162ASCII(const Char* from, char* to, int32 len);
+
     // Convert characters from UTF-8 to UTF-16
     static void ConvertUTF82UTF16(const char* from, Char* to, int32 fromLength, int32& toLength);
 

Source/Engine/Tools/MaterialGenerator/MaterialGenerator.Material.cpp

@@ -140,7 +140,9 @@ void MaterialGenerator::ProcessGroupMaterial(Box* box, Node* node, Value& value)
 
         // Write code
         _writer.Write(TEXT("{\n"));
-        _writer.Write(*code);
+        _writer.Write(code);
+        if (!code.EndsWith(TEXT("\n")) && !code.EndsWith(TEXT(" ")))
+            _writer.Write(TEXT("\n"));
         _writer.Write(TEXT("}\n"));
 
         // Link output values to boxes

Source/Engine/Tools/MaterialGenerator/MaterialGenerator.cpp

@@ -627,8 +627,9 @@ bool MaterialGenerator::Generate(WriteStream& source, MaterialInfo& materialInfo
                 if (in.Length() > 0)
                 {
                     tmp.EnsureCapacity(in.Length() + 1, false);
-                    StringUtils::ConvertUTF162ANSI(*in, tmp.Get(), in.Length());
+                    StringUtils::ConvertUTF162ASCII(*in, tmp.Get(), in.Length());
                     source.WriteBytes(tmp.Get(), in.Length());
+                    tmp.Clear();
                 }
             }
         }