[refactoring-ode][classes] fixed inertiaNoMot in Rocket.m, updated Motor.m

     - First attempt of retrocompatibility with solid motors

classes/Rocket.m

@@ -131,7 +131,7 @@ classdef Rocket < Component
             inertias = [bNoMotor.inertia];
             temp = inertias(2:3, :) + ...
                 (obj.xCgNoMotor' - (aPosNoMotor + [bNoMotor.xCg])).^2 .* [bNoMotor.mass];
-            obj.inertiaNoMotor = [sum(inertias(1)); sum(temp, 2)];
+            obj.inertiaNoMotor = [sum(inertias(1, :)); sum(temp, 2)];
         end
 
         function updateInertia(obj)

classes/bays/Motor.m

@@ -58,18 +58,13 @@ classdef Motor < Bay
         end
 
         function mass = get.mass(obj)
-            mass = obj.propellantMass + ... 
-                obj.structureMass; %+ obj.fuselageMass;
+            mass = obj.propellantMass + obj.structureMass;
         end
 
         function fuselageXCg = get.fuselageXCg(obj)
             fuselageXCg = (obj.length - ...
                 obj.tankLength)/2 + obj.tankLength;
         end
-
-        function isHRE = get.isHRE(obj)
-            isHRE = contains(obj.name, 'HRE');
-        end
     end
 
     methods (Access = protected)
@@ -88,6 +83,9 @@ classdef Motor < Bay
                 error(strcat('Unable to find engine: ', obj.name));
             end
 
+            obj.isHRE = contains(obj.name, 'HRE');
+            
+            if obj.isHRE
                 obj.length         = chosenMotor.L;    
                 obj.tankLength     = chosenMotor.Ltank;
                 obj.time           = chosenMotor.t;    
@@ -96,12 +94,18 @@ classdef Motor < Bay
                 obj.oxidizerMass   = chosenMotor.mOx;  
                 obj.structureMass  = chosenMotor.mc;   
                 obj.propellantMass = chosenMotor.m;   
-            obj.xCg            = chosenMotor.xcg; 
                 obj.inertia        = [chosenMotor.Ixx;chosenMotor.Iyy;chosenMotor.Izz];
+                obj.xCg            = chosenMotor.xcg;  
                 obj.pe             = chosenMotor.Pe;   
                 obj.ae             = chosenMotor.Ae;   
                 obj.fuselageMass   = chosenMotor.mFus;                  
-
+            else
+                obj.length         = chosenMotor.L;
+                obj.time           = chosenMotor.t;
+                obj.thrust         = chosenMotor.T;
+                obj.propellantMass = chosenMotor.m;
+                obj.structureMass  = chosenMotor.mc;
+            end
             if isempty(obj.cutoffTime) || obj.cutoffTime > obj.time(end)
                 obj.cutoffTime = obj.time(end);
             end