Fix for game crashing sometimes when using MissionController

src/CMakeLists.txt

@@ -120,6 +120,7 @@ object/mainmovie.cpp
 object/motion/motion.cpp
 object/motion/motionant.cpp
 object/motion/motionbee.cpp
+object/motion/motiondummy.cpp
 object/motion/motionhuman.cpp
 object/motion/motionmother.cpp
 object/motion/motionspider.cpp

src/object/motion/motiondummy.cpp

@@ -0,0 +1,62 @@
+// * This file is part of the COLOBOT source code
+// * Copyright (C) 2001-2008, Daniel ROUX & EPSITEC SA, www.epsitec.ch
+// *
+// * This program is free software: you can redistribute it and/or modify
+// * it under the terms of the GNU General Public License as published by
+// * the Free Software Foundation, either version 3 of the License, or
+// * (at your option) any later version.
+// *
+// * This program is distributed in the hope that it will be useful,
+// * but WITHOUT ANY WARRANTY; without even the implied warranty of
+// * MERCHANTABILITY or FITNESS FOR A PARTICULAR PURPOSE. See the
+// * GNU General Public License for more details.
+// *
+// * You should have received a copy of the GNU General Public License
+// * along with this program. If not, see  http://www.gnu.org/licenses/.
+
+
+#include "object/motion/motiondummy.h"
+
+#include "graphics/engine/modelmanager.h"
+
+#include <stdio.h>
+#include <string.h>
+
+
+
+
+
+// Object's constructor.
+
+CMotionDummy::CMotionDummy(CObject* object) : CMotion(object)
+{
+}
+
+// Object's destructor.
+
+CMotionDummy::~CMotionDummy()
+{
+}
+
+
+// Removes an object.
+
+void CMotionDummy::DeleteObject(bool bAll)
+{
+}
+
+
+// Creates a Dummy traveling any lands on the ground.
+
+bool CMotionDummy::Create(Math::Vector pos, float angle, ObjectType type,
+                          float power)
+{
+    m_object->SetType(type);
+
+    // Creates the main base.
+    int rank = m_engine->CreateObject();
+    m_engine->SetObjectType(rank, Gfx::ENG_OBJTYPE_VEHICULE);  // this is a moving object
+    m_object->SetObjectRank(0, rank);
+
+    return true;
+}

src/object/motion/motiondummy.h

@@ -0,0 +1,32 @@
+// * This file is part of the COLOBOT source code
+// * Copyright (C) 2001-2008, Daniel ROUX & EPSITEC SA, www.epsitec.ch
+// *
+// * This program is free software: you can redistribute it and/or modify
+// * it under the terms of the GNU General Public License as published by
+// * the Free Software Foundation, either version 3 of the License, or
+// * (at your option) any later version.
+// *
+// * This program is distributed in the hope that it will be useful,
+// * but WITHOUT ANY WARRANTY; without even the implied warranty of
+// * MERCHANTABILITY or FITNESS FOR A PARTICULAR PURPOSE. See the
+// * GNU General Public License for more details.
+// *
+// * You should have received a copy of the GNU General Public License
+// * along with this program. If not, see  http://www.gnu.org/licenses/.
+
+// motiondummy.h
+
+#pragma once
+
+
+#include "object/motion/motion.h"
+
+class CMotionDummy : public CMotion
+{
+public:
+    CMotionDummy(CObject* object);
+    ~CMotionDummy();
+
+    void        DeleteObject(bool bAll=false);
+    bool        Create(Math::Vector pos, float angle, ObjectType type, float power);
+};

src/object/object.cpp

@@ -64,6 +64,7 @@
 #include "object/motion/motion.h"
 #include "object/motion/motionant.h"
 #include "object/motion/motionbee.h"
+#include "object/motion/motiondummy.h"
 #include "object/motion/motionhuman.h"
 #include "object/motion/motionmother.h"
 #include "object/motion/motionspider.h"
@@ -2146,7 +2147,7 @@ bool CObject::CreateVehicle(Math::Vector pos, float angle, ObjectType type,
         m_motion = new CMotionHuman(this);
     }
     else if ( type == OBJECT_CONTROLLER ) {
-        m_motion = new CMotion(this); //dummy object
+        m_motion = new CMotionDummy(this); //dummy object
     }
     else {
         m_motion = new CMotionVehicle(this);