Initial import of Red Planet v4.10 Win32 source

Imports the current Win32 source for the pod-racing game 'Red Planet',
built on the MUNGA engine and its L4 (Win32/DirectX) platform layer:

- MUNGA / MUNGA_L4: cross-platform engine core and Win32 backend
- RP / RP_L4: Red Planet game logic and Win32 application
- DivLoader, Setup1: asset loader and installer project
- lib, MUNGA_L4/openal, MUNGA_L4/sos: third-party audio dependencies

Removed stale Subversion metadata and added .gitignore/.gitattributes.

Co-Authored-By: Claude Opus 4.8 <noreply@anthropic.com>

MUNGA/SET.cpp

@@ -0,0 +1,144 @@
+#include "munga.h"
+#include "set.h"
+
+//~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~ Set ~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~
+
+//
+//#############################################################################
+// Set
+//#############################################################################
+//
+Set::Set(Node *node):
+	 Socket(node),
+	 contents(NULL)
+{
+
+}
+
+
+
+
+//
+//#############################################################################
+// ~Set
+//#############################################################################
+//
+Set::~Set()
+{
+	SetReleaseNode(NULL);
+	if (contents)
+	{
+		delete contents;
+	}
+}
+
+//
+//#############################################################################
+// TestInstance
+//#############################################################################
+//
+Logical
+	Set::TestInstance() const
+{
+	Socket::TestInstance();
+	Check(contents);
+	return True;
+}
+
+
+//
+//#############################################################################
+// Union
+//
+// Merge contents of this with rhs.   Items that occur in either set are placed
+// in the resulting set, with no duplication.  It is assumed that both operands
+// are proper sets, ie. they contain no duplicates.
+//#############################################################################
+//
+
+Set
+	Set::Union(const Set &) const
+{
+	Check(this);
+
+
+	Set result(NULL);
+
+	return result;
+}
+
+
+//
+//#############################################################################
+// Intersection
+//
+// Merge contents of this with rhs.   Items that occur in both sets are placed
+// only once in the resulting set.  It is assumed that both operands are proper
+// sets, ie. they contain no duplicates.
+//
+// This implementation of set intersection is dumb and slow.
+//#############################################################################
+//
+
+Set
+	Set::Intersection(const Set &rhs) const
+{
+	Check(this);
+	Check(rhs);
+
+	// Contents iterator is a SetIterator and not a ChainIterator in order to
+	// have access to the ChainIterator::ReadAndNextImplentation.
+	// We circumvent encapsulation protections by declaring Set a friend of SetIterator
+	// (which derives from ChainIterator).  Set is not a friend of ChainIterator.
+
+	SetIterator contents_iterator(contents);
+
+	// Casting away const is safe since our local iterator is not going to insert or
+	// remove items from rhs.
+	SetIterator rhs_iterator((Set *) &rhs);
+	Plug *lhs_plug;
+	Plug *rhs_plug;
+	Set result(NULL);
+
+
+	while ((lhs_plug = Cast_Object(Plug *, contents_iterator.ReadAndNextImplementation())) != NULL)
+	{
+		while ((rhs_plug = Cast_Object(Plug *,rhs_iterator.ReadAndNextImplementation())) != NULL)
+		{
+			if (lhs_plug == rhs_plug)
+			{
+				result.AddImplementation(lhs_plug);
+			}
+		}
+	}
+	return result;
+}
+
+//~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~ SetIterator ~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~
+
+//
+//#############################################################################
+// SetIterator
+//#############################################################################
+//
+SetIterator::SetIterator(Set *set):
+	ChainIterator(set->contents)
+{
+	Check(set);
+}
+
+SetIterator::SetIterator(const SetIterator &iterator):
+	ChainIterator(Cast_Object(Chain*, (Cast_Object(Set *,iterator.socket)->contents)))
+{
+	Check(&iterator);
+}
+
+SetIterator::SetIterator(Chain *chain):
+	ChainIterator(chain)
+{
+	Check(chain);
+}
+
+SetIterator::~SetIterator()
+{
+}