add torque unit

Source/Editor/Utilities/ShuntingYardParser.cs

@@ -144,13 +144,16 @@ namespace FlaxEditor.Utilities
         /// List known units which cannot be handled as a variable easily because they contain operator
         /// symbols (mostly a forward slash). The value is the factor to calculate game units. 
         /// </summary>
+        // Nm is here because these values are compared case-sensitive and we don't want to confuse
+        // nanometers and Newtonmeters
         private static readonly IDictionary<string, double> UnitSymbols = new Dictionary<string, double>
         {
             ["cm/s"] = Units.Meters2Units / 100,
             ["cm/s²"] = Units.Meters2Units / 100,
             ["m/s"] = Units.Meters2Units,
             ["m/s²"] = Units.Meters2Units,
-            ["km/h"] = 1/3.6 * Units.Meters2Units
+            ["km/h"] = 1/3.6 * Units.Meters2Units,
+            ["Nm"] = Units.Meters2Units * Units.Meters2Units
         };
 
         /// <summary>

Source/Editor/Utilities/Utils.cs

@@ -1203,6 +1203,7 @@ namespace FlaxEditor.Utilities
                 case FlaxEngine.Utils.ValueCategory.Volume: return (value / Units.Meters2Units / Units.Meters2Units / Units.Meters2Units).ToString(format, CultureInfo.InvariantCulture) + "m³";
                 case FlaxEngine.Utils.ValueCategory.Mass: return value.ToString(format, CultureInfo.InvariantCulture) + "kg";
                 case FlaxEngine.Utils.ValueCategory.Force: return (value / Units.Meters2Units).ToString(format, CultureInfo.InvariantCulture) + "N";
+                case FlaxEngine.Utils.ValueCategory.Torque: return (value / Units.Meters2Units / Units.Meters2Units).ToString(format, CultureInfo.InvariantCulture) + "Nm";
                 case FlaxEngine.Utils.ValueCategory.None:
                 default:
                     return FormatFloat(value);

Source/Engine/Physics/Actors/RigidBody.h

@@ -181,7 +181,7 @@ public:
     /// <summary>
     /// Gets the mass value measured in kilograms (use override value only if OverrideMass is checked).
     /// </summary>
-    API_PROPERTY(Attributes="EditorOrder(110), Limit(0), EditorDisplay(\"Rigid Body\")")
+    API_PROPERTY(Attributes="EditorOrder(110), Limit(0), EditorDisplay(\"Rigid Body\"), NumberCategory(Utils.ValueCategory.Mass)")
     float GetMass() const;
 
     /// <summary>

Source/Engine/Utilities/Utils.cs

@@ -1053,7 +1053,8 @@ namespace FlaxEngine
             Speed,
             Acceleration,
             Time,
-            Force
+            Force,
+            Torque
         }
     }
 }