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/RECT2D.cpp

@@ -0,0 +1,138 @@
+#include "munga.h"
+#pragma hdrstop
+
+#include "rect2d.h"
+
+//
+//------------------------------------------------------------------------
+// Creators
+//------------------------------------------------------------------------
+//
+Rectangle2D::Rectangle2D()
+{
+	MakeEmpty();				// uninitialized rectangles should be "empty"
+}
+
+Rectangle2D::Rectangle2D(
+		Vector2DOf<int> bl,
+		Vector2DOf<int> tr
+	)
+{
+	bottomLeft = bl;
+	topRight = tr;
+}
+
+Rectangle2D::Rectangle2D(
+		int x1, int y1, int x2, int y2
+	)
+{
+	bottomLeft.x = x1;
+	bottomLeft.y = y1;
+	topRight.x = x2;
+	topRight.y = y2;
+}
+
+//
+//------------------------------------------------------------------------
+// Union (returns bounding rectangle)
+//------------------------------------------------------------------------
+//
+void
+	Rectangle2D::Union(
+			const Rectangle2D& r1,
+			const Rectangle2D& r2
+		)
+{
+	Check(this);
+	Check(&r1);
+	Check(&r2);
+
+	if (r1.IsEmpty())
+	{
+		if (r2.IsEmpty())
+		{
+			MakeEmpty();
+		}
+		else
+		{
+			bottomLeft = r2.bottomLeft;
+			topRight = r2.topRight;
+		}
+	}
+	else
+	{
+		if (r2.IsEmpty())
+		{
+			bottomLeft = r1.bottomLeft;
+			topRight = r1.topRight;
+		}
+		else
+		{
+			bottomLeft.x = Min(r1.bottomLeft.x, r2.bottomLeft.x);
+			bottomLeft.y = Min(r1.bottomLeft.y, r2.bottomLeft.y);
+			topRight.x = Max(r1.topRight.x, r2.topRight.x);
+			topRight.y = Max(r1.topRight.y, r2.topRight.y);
+		}
+	}
+}
+
+//
+//------------------------------------------------------------------------
+// Intersection (returns overlapping section)
+//------------------------------------------------------------------------
+//
+void
+	Rectangle2D::Intersection(
+		const Rectangle2D& r1,
+		const Rectangle2D& r2
+		)
+{
+	Check(this);
+	Check(&r1);
+	Check(&r2);
+
+	if (r1.IsEmpty())
+	{
+		MakeEmpty();
+	}
+	else
+	{
+		if (r2.IsEmpty())
+		{
+			MakeEmpty();
+		}
+		else
+		{
+			bottomLeft.x = Max(r1.bottomLeft.x, r2.bottomLeft.x);
+			bottomLeft.y = Max(r1.bottomLeft.y, r2.bottomLeft.y);
+			topRight.x = Min(r1.topRight.x, r2.topRight.x);
+			topRight.y = Min(r1.topRight.y, r2.topRight.y);
+		}
+	}
+}
+
+//
+//------------------------------------------------------------------------
+// Output stream operator
+//------------------------------------------------------------------------
+//
+std::ostream& operator<<(std::ostream& Stream, const Rectangle2D& r)
+{
+	Check(&r);
+	return Stream << '(' << r.bottomLeft << ',' << r.topRight << ')';
+}
+
+//
+//------------------------------------------------------------------------
+// TestInstance
+//------------------------------------------------------------------------
+//
+Logical
+	Rectangle2D::TestInstance() const
+{
+	return True;
+}
+
+#if defined(TEST_CLASS)
+#	include "rect2d.tcp"
+#endif