applying Volker Mische engine patch

correct bug #3594

source/gameengine/Ketsji/KX_IpoActuator.cpp

@@ -163,7 +163,8 @@ bool KX_IpoActuator::ClampLocalTime()
 void KX_IpoActuator::SetStartTime(float curtime)
 {
 	float direction = m_startframe < m_endframe ? 1.0 : -1.0;
-	
+
+	curtime = curtime - KX_KetsjiEngine::GetSuspendedDelta();	
 	if (m_direction > 0)
 		m_starttime = curtime - direction*(m_localtime - m_startframe)/KX_FIXED_FRAME_PER_SEC;
 	else
@@ -172,7 +173,14 @@ void KX_IpoActuator::SetStartTime(float curtime)
 
 void KX_IpoActuator::SetLocalTime(float curtime)
 {
-	float delta_time = (curtime - m_starttime)*KX_FIXED_FRAME_PER_SEC;
+	float delta_time = ((curtime - m_starttime) - KX_KetsjiEngine::GetSuspendedDelta())*KX_FIXED_FRAME_PER_SEC;
+	
+	// negative delta_time is caused by floating point inaccuracy
+	// perhaps the inaccuracy could be reduced a bit
+	if ((m_localtime==m_startframe || m_localtime==m_endframe) && delta_time<0.0)
+	{
+		delta_time = 0.0;
+	}
 	
 	if (m_endframe < m_startframe)
 		delta_time = -delta_time;
@@ -211,7 +219,7 @@ bool KX_IpoActuator::Update(double curtime, bool frame)
 
 	bool result=true;
 	if (m_starttime < -2.0*start_smaller_then_end*(m_endframe - m_startframe))
-		m_starttime = curtime;
+		m_starttime = curtime - KX_KetsjiEngine::GetSuspendedDelta();
 	
 	switch (m_type)
 	{
@@ -241,7 +249,7 @@ bool KX_IpoActuator::Update(double curtime, bool frame)
 		} else
 		{
 			m_localtime=m_startframe;
-			m_starttime=curtime;
+			SetStartTime(curtime);
 			m_direction=1;
 		}
 		break;

source/gameengine/Ketsji/KX_KetsjiEngine.cpp

@@ -99,6 +99,9 @@ const char KX_KetsjiEngine::m_profileLabels[tc_numCategories][15] = {
 
 double KX_KetsjiEngine::m_ticrate = DEFAULT_LOGIC_TIC_RATE;
 
+double KX_KetsjiEngine::m_suspendedtime = 0.0;
+double KX_KetsjiEngine::m_suspendeddelta = 0.0;
+
 
 /**
  *	Constructor of the Ketsji Engine
@@ -355,6 +358,12 @@ void KX_KetsjiEngine::NextFrame()
 	
 			if (!scene->IsSuspended())
 			{
+				// if the scene was suspended recalcutlate the delta tu "curtime"
+				m_suspendedtime = scene->getSuspendedTime();
+				if (scene->getSuspendedTime()!=0.0)
+					scene->setSuspendedDelta(scene->getSuspendedDelta()+curtime-scene->getSuspendedTime());
+				m_suspendeddelta = scene->getSuspendedDelta();
+
 				m_logger->StartLog(tc_physics, m_kxsystem->GetTimeInSeconds(), true);
 				m_logger->StartLog(tc_network, m_kxsystem->GetTimeInSeconds(), true);
 				scene->GetNetworkScene()->proceed(localtime);
@@ -403,7 +412,11 @@ void KX_KetsjiEngine::NextFrame()
 					m_sceneconverter->WritePhysicsObjectToAnimationIpo(m_currentFrame++);
 				}
 
+				scene->setSuspendedTime(0.0);
 			} // suspended
+			else
+				if(scene->getSuspendedTime()==0.0)
+					scene->setSuspendedTime(curtime);
 	
 			DoSound(scene);
 	
@@ -439,6 +452,12 @@ void KX_KetsjiEngine::NextFrame()
 
 		if (!scene->IsSuspended())
 		{
+			// if the scene was suspended recalcutlate the delta tu "curtime"
+			m_suspendedtime = scene->getSuspendedTime();
+			if (scene->getSuspendedTime()!=0.0)
+				scene->setSuspendedDelta(scene->getSuspendedDelta()+curtime-scene->getSuspendedTime());
+			m_suspendeddelta = scene->getSuspendedDelta();
+			
 			// set Python hooks for each scene
 			PHY_SetActiveEnvironment(scene->GetPhysicsEnvironment());
 			PHY_SetActiveScene(scene);
@@ -459,7 +478,12 @@ void KX_KetsjiEngine::NextFrame()
 			// Actuators can affect the scenegraph
 			m_logger->StartLog(tc_scenegraph, m_kxsystem->GetTimeInSeconds(), true);
 			scene->UpdateParents(curtime);
+			 
+ 			scene->setSuspendedTime(0.0);
 		} // suspended
+ 		else
+ 			if(scene->getSuspendedTime()==0.0)
+ 				scene->setSuspendedTime(curtime);
 
 		DoSound(scene);
 
@@ -1224,6 +1248,11 @@ bool KX_KetsjiEngine::GetUseFixedTime(void) const
 	return m_bFixedTime;
 }
 
+double KX_KetsjiEngine::GetSuspendedDelta()
+{
+	return m_suspendeddelta;
+}
+
 double KX_KetsjiEngine::GetTicRate()
 {
 	return m_ticrate;

source/gameengine/Ketsji/KX_KetsjiEngine.h

@@ -103,6 +103,9 @@ private:
 	double				m_deltatime;
 	static double			m_ticrate;
 
+	static double			m_suspendedtime;
+	static double			m_suspendeddelta;
+
 	int					m_exitcode;
 	STR_String			m_exitstring;
 		/**
@@ -237,7 +240,13 @@ public:
 	 * @return Current setting for display all frames.
 	 */ 
 	bool GetUseFixedTime(void) const;
-	
+
+	/**
+	 * Returns the difference between the local time of the scene (when it
+	 * was running and not suspended) and the "curtime"
+	 */
+	static double GetSuspendedDelta();
+
 	/**
 	 * Gets the number of logic updates per second.
 	 */

source/gameengine/Ketsji/KX_Scene.cpp

@@ -112,7 +112,8 @@ KX_Scene::KX_Scene(class SCA_IInputDevice* keyboarddevice,
 	m_active_camera(NULL),
 	m_ueberExecutionPriority(0)
 {
-		
+	m_suspendedtime = 0.0;
+	m_suspendeddelta = 0.0;
 
 	m_activity_culling = false;
 	m_suspend = false;
@@ -1135,6 +1136,23 @@ void KX_Scene::SetPhysicsEnvironment(class PHY_IPhysicsEnvironment* physEnv)
 	m_logicmgr->RegisterEventManager(touchmgr);
 	return;
 }
+ 
+void KX_Scene::setSuspendedTime(double suspendedtime)
+{
+	m_suspendedtime = suspendedtime;
+}
+double KX_Scene::getSuspendedTime()
+{
+	return m_suspendedtime;
+}
+void KX_Scene::setSuspendedDelta(double suspendeddelta)
+{
+	m_suspendeddelta = suspendeddelta;
+}
+double KX_Scene::getSuspendedDelta()
+{
+	return m_suspendeddelta;
+}
 
 //----------------------------------------------------------------------------
 //Python

source/gameengine/Ketsji/KX_Scene.h

@@ -251,6 +251,9 @@ protected:
 	void MarkVisible(SG_Tree *node, RAS_IRasterizer* rasty);
 	void MarkSubTreeVisible(SG_Tree *node, RAS_IRasterizer* rasty, bool visible);
 	void MarkVisible(RAS_IRasterizer* rasty, KX_GameObject* gameobj);
+
+	double				m_suspendedtime;
+	double				m_suspendeddelta;
 	
 	/**
 	 * This stores anything from python
@@ -515,6 +518,25 @@ public:
 	virtual PyObject* _getattr(const STR_String& attr); /* name, active_camera, gravity, suspended, viewport, framing, activity_culling, activity_culling_radius */
 	virtual int _setattr(const STR_String &attr, PyObject *pyvalue);
 	virtual int _delattr(const STR_String &attr);
+
+	/**
+	 * Sets the time the scene was suspended
+	 */ 
+	void setSuspendedTime(double suspendedtime);
+	/**
+	 * Returns the "curtime" the scene was suspended
+	 */ 
+	double getSuspendedTime();
+	/**
+	 * Sets the difference between the local time of the scene (when it
+	 * was running and not suspended) and the "curtime"
+	 */ 
+	void setSuspendedDelta(double suspendeddelta);
+	/**
+	 * Returns the difference between the local time of the scene (when it
+	 * was running and not suspended) and the "curtime"
+	 */
+	double getSuspendedDelta();
 };
 
 typedef std::vector<KX_Scene*> KX_SceneList;