Initial commit: bt411 -- standalone Windows BattleTech (Tesla 4.10 port)

Clean, self-contained extraction of the BattleTech-specific work from the
reverse-engineering workspace -- engine + game + content + build, with nothing
from Red Planet or the raw archive dumps. Builds green (Win32) and runs the
single-player drive->animate->target->fire->damage->destroy loop out of the box.

Layout:
  engine/   MUNGA + MUNGA_L4 shared 2007 engine, carrying our BT render/loader
            work (bgfload/L4D3D/L4VIDEO: BSL bit-slice decode, LOD/ground/shadow
            models) + image codec; the minimal rp/ headers the audio HAL needs
  game/     reconstructed BT logic + surviving-original BT source + fwd shims
            + WinMain launcher
  content/  full runtime tree (BTL4.RES, VIDEO/, GAUGE/, AUDIO/, eggs, BTDPL.INI)
  docs/     format specs + reconstruction ledgers
  reference/ raw Ghidra pseudocode (recon source-of-truth) + decomp exporter
  tools/    MP console emulator + map/resource scanners

One top-level CMake builds munga_engine lib + bt410_l4 game lib + btl4.exe.
All paths relativized (186 fwd shims + ~437 CMake abs paths -> repo-relative);
DXSDK is the one external, overridable via -DDXSDK. Verified: builds to a
byte-identical 2.27MB exe and runs combat (TARGET DESTROYED, 0 crashes) against
the bundled content.

Co-Authored-By: Claude Opus 4.8 (1M context) <noreply@anthropic.com>

engine/MUNGA/APPTASK.cpp

@@ -0,0 +1,185 @@
+#include "munga.h"
+#pragma hdrstop
+
+#include "apptask.h"
+#include "renderer.h"
+#include "audrend.h"
+#include "app.h"
+#include "nttmgr.h"
+#include "gaugrend.h"
+
+#if defined(TRACE_COMPLETE_CYCLES)
+	BitTrace Complete_Cycles("Complete Cycles");
+#endif
+
+#if defined(TRACE_DEATH_ROW)
+	BitTrace Death_Row("Death Row");
+#endif
+
+//#############################################################################
+//###########################    ApplicationTask    ###########################
+//#############################################################################
+
+ApplicationTask::ApplicationTask(ClassID class_ID):
+	Component(class_ID)
+{
+}
+
+ApplicationTask::~ApplicationTask()
+{
+}
+
+//#############################################################################
+//###########################    BackgroundTasks    ###########################
+//#############################################################################
+
+BackgroundTasks::BackgroundTasks():
+	taskSocket(NULL)
+{
+	taskIterator = new SChainIteratorOf<ApplicationTask*>(&taskSocket);
+	Register_Object(taskIterator);
+}
+
+BackgroundTasks::~BackgroundTasks()
+{
+	Check(taskIterator);
+   taskIterator->DeletePlugs();
+	Unregister_Object(taskIterator);
+	delete taskIterator;
+}
+
+Logical
+	BackgroundTasks::TestInstance() const
+{
+	Component::TestInstance();
+	Check(&taskSocket);
+	Check(taskIterator);
+	return True;
+}
+
+void
+	BackgroundTasks::AddTask(ApplicationTask *task)
+{
+	Check(this);
+   Check(task);
+	taskSocket.Add(task);
+}
+
+void
+	BackgroundTasks::Execute()
+{
+   Check(this);
+
+   Check(taskIterator);
+   if (taskIterator->GetCurrent() == NULL)
+   {
+      taskIterator->First();
+   }
+
+   ApplicationTask *task = taskIterator->GetCurrent();
+   Check(task);
+
+   task->Execute();
+   taskIterator->Next();
+}
+
+//~~~~~~~~~~~~~~~~~~~~~~~~~~~~ NetworkManagerTask ~~~~~~~~~~~~~~~~~~~~~~~~~~~~~
+
+void
+	NetworkManagerTask::Execute()
+{
+	Check(this);
+	Check(application);
+	Check(application->GetNetworkManager());
+
+   Time start = Now();
+
+	application->GetNetworkManager()->ExecuteBackground();
+
+   Time end = Now();
+
+   if (end.ticks - start.ticks > 10)
+   {
+      end = start;
+   }
+}
+
+//~~~~~~~~~~~~~~~~~~~~~~~~~~~~ RoutePacketTask ~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~
+
+void
+	RoutePacketTask::Execute()
+{
+	Check(this);
+
+	Check(application);
+	Check(application->GetNetworkManager());
+	application->GetNetworkManager()->RoutePacket();
+}
+
+//~~~~~~~~~~~~~~~~~~~~~~~~~~~~ ProcessEventTask ~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~
+
+void
+	ProcessEventTask::Execute()
+{
+	Check(this);
+	Check(application);
+	application->ProcessOneEvent();
+}
+
+//~~~~~~~~~~~~~~~~~~~~~~~~~~~~ AudioRendererTask ~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~
+
+void
+	AudioRendererTask::Execute()
+{
+	Check(this);
+	Check(application);
+	if (application->GetAudioRenderer() != NULL)
+	{
+		Check(application->GetAudioRenderer());
+		application->GetAudioRenderer()->ExecuteBackground();
+	}
+}
+
+//~~~~~~~~~~~~~~~~~~~~~~~~~~~~ GaugeRendererTask ~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~
+
+void
+	GaugeRendererTask::Execute()
+{
+	Check(this);
+	Check(application);
+	if (application->GetGaugeRenderer() != NULL)
+	{
+		Check(application->GetGaugeRenderer());
+		application->GetGaugeRenderer()->ExecuteBackground();
+	}
+}
+
+//~~~~~~~~~~~~~~~~~~~~~~~~~~~ CompleteCyclesTask ~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~
+
+void
+	CompleteCyclesTask::Execute()
+{
+	SET_COMPLETE_CYCLES();
+
+	Check(this);
+	Check(application);
+	Check(application->GetRendererManager());
+//	application->GetRendererManager()->CompleteCycles();
+
+	CLEAR_COMPLETE_CYCLES();
+}
+
+//~~~~~~~~~~~~~~~~~~~~~~~~~~~~~ FryDeathRowTask ~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~
+
+void
+	FryDeathRowTask::Execute()
+{
+	SET_DEATH_ROW();
+
+	Check(this);
+	Check(application);
+	Check(application->GetEntityManager());
+	application->GetEntityManager()->FryDeathRow();
+
+	CLEAR_DEATH_ROW();
+}