Have the documentation print out more information if an error occurs

Add other scene files (commented out) to the openspace.cfg

src/documentation/documentation.cpp

@@ -68,6 +68,32 @@ std::string to_string(std::string value) {
     return value;
 }
 
+std::string to_string(openspace::documentation::TestResult testResult) {
+    using namespace openspace::documentation;
+
+    if (testResult.success) {
+        return "Success";
+    }
+    else {
+        std::stringstream stream;
+        stream << "Failure." << '\n';
+
+        for (const TestResult::Offense& offense : testResult.offenses) {
+            stream << "  " << std::to_string(offense) << '\n';
+        }
+
+        for (const TestResult::Warning& warning : testResult.warnings) {
+            stream << "  " << std::to_string(warning) << '\n';
+        }
+
+        return stream.str();
+    }
+}
+
+std::string to_string(openspace::documentation::TestResult::Offense offense) {
+    return offense.offender + ": " + std::to_string(offense.reason);
+}
+
 std::string to_string(openspace::documentation::TestResult::Offense::Reason reason) {
     switch (reason) {
         case openspace::documentation::TestResult::Offense::Reason::ExtraKey:
@@ -85,6 +111,10 @@ std::string to_string(openspace::documentation::TestResult::Offense::Reason reas
     }
 }
 
+std::string to_string(openspace::documentation::TestResult::Warning warning) {
+    return warning.offender + ": " + std::to_string(warning.reason);
+}
+
 std::string to_string(openspace::documentation::TestResult::Warning::Reason reason) {
     switch (reason) {
         case openspace::documentation::TestResult::Warning::Reason::Deprecated:

src/scene/scene_lua.inl

@@ -22,6 +22,8 @@
  * OR THE USE OR OTHER DEALINGS IN THE SOFTWARE.                                         *
  ****************************************************************************************/
 
+#include <openspace/documentation/documentation.h>
+
 #include <regex>
 
 namespace openspace {
@@ -364,6 +366,14 @@ int addSceneGraphNode(lua_State* L) {
         }
 
         OsEng.renderEngine().scene()->initializeNode(node);
+    }
+    catch (const documentation::SpecificationError& e) {
+        return luaL_error(
+            L,
+            "Error loading scene graph node: %s: %s",
+            e.what(),
+            std::to_string(e.result).c_str()
+        );
     } catch (const ghoul::RuntimeError& e) {
         return luaL_error(L, "Error loading scene graph node: %s", e.what());
     }