Initial commit

Torque/SDK/engine/core/iTickable.cc

@@ -0,0 +1,79 @@
+//-----------------------------------------------------------------------------
+// Torque Game Engine
+// Copyright (C) GarageGames.com, Inc.
+//-----------------------------------------------------------------------------
+
+#include "core/iTickable.h"
+
+// The statics
+U32 ITickable::smLastTick = 0;
+U32 ITickable::smLastTime = 0;
+U32 ITickable::smLastDelta = 0;
+
+Vector<ITickable *> ITickable::smProcessList;
+const F32 ITickable::smTickSec = ( F32( ITickable::smTickMs ) / 1000.f );
+const U32 ITickable::smTickShift = 5;
+const U32 ITickable::smTickMs = ( 1 << smTickShift );
+const U32 ITickable::smTickMask = ( smTickMs - 1 );
+
+//------------------------------------------------------------------------------
+
+ITickable::ITickable()
+{
+   smProcessList.push_back( this );
+}
+
+//------------------------------------------------------------------------------
+
+ITickable::~ITickable()
+{
+   for( ProcessListIterator i = smProcessList.begin(); i != smProcessList.end(); i++ )
+   {
+      if( (*i) == this )
+      {
+         smProcessList.erase( i );
+         return;
+      }
+   }
+}
+
+//------------------------------------------------------------------------------
+
+bool ITickable::advanceTime( U32 timeDelta )
+{
+   U32 targetTime = smLastTime + timeDelta;
+   U32 targetTick = ( targetTime + smTickMask ) & ~smTickMask;
+   U32 tickCount = ( targetTick - smLastTick ) >> smTickShift;
+
+   // If we are going to send a tick, call interpolateTick(0) so that the objects
+   // will reset back to their position at the last full tick
+   if( smLastDelta && tickCount )
+      for( ProcessListIterator i = smProcessList.begin(); i != smProcessList.end(); i++ )
+         if( (*i)->isProcessingTicks() )
+            (*i)->interpolateTick( 0.f );
+
+   // Advance objects
+   if( tickCount )
+      for( ; smLastTick != targetTick; smLastTick += smTickMs )
+         for( ProcessListIterator i = smProcessList.begin(); i != smProcessList.end(); i++ )
+            if( (*i)->isProcessingTicks() )
+               (*i)->processTick();
+
+   smLastDelta = ( smTickMs - ( targetTime & smTickMask ) ) & smTickMask;
+   F32 dt = smLastDelta / F32( smTickMs );
+
+   // Now interpolate objects that want ticks
+   for( ProcessListIterator i = smProcessList.begin(); i != smProcessList.end(); i++ )
+      if( (*i)->isProcessingTicks() )
+         (*i)->interpolateTick( dt );
+
+
+   // Inform ALL objects that time was advanced
+   dt = F32( timeDelta ) / 1000.f;
+   for( ProcessListIterator i = smProcessList.begin(); i != smProcessList.end(); i++ )
+      (*i)->advanceTime( dt );
+
+   smLastTime = targetTime;
+
+   return tickCount != 0;
+}