restructured repository based on following standards:

https://github.com/HW-Core/directory-structure

modules/dep/g3dlite/include/G3D/debug.h

@@ -0,0 +1,66 @@
+/**
+ @file debug.h
+
+ @maintainer Morgan McGuire, http://graphics.cs.williams.edu
+
+ @created 2001-08-26
+ @edited  2006-02-16
+
+  Copyright 2000-2006, Morgan McGuire.
+ All rights reserved.
+*/
+
+#ifndef G3D_DEBUG_H
+#define G3D_DEBUG_H
+
+#include "G3D/platform.h"
+#ifdef _MSC_VER
+    #include <crtdbg.h>
+#endif
+
+#include "G3D/debugPrintf.h"
+#include "G3D/debugAssert.h"
+
+namespace G3D {
+
+#ifdef _MSC_VER
+    // Turn off 64-bit warnings
+#   pragma warning(push)
+#   pragma warning( disable : 4312)
+#   pragma warning( disable : 4267)
+#   pragma warning( disable : 4311)
+#endif
+
+
+/**
+ Useful for debugging purposes.
+ */
+inline bool isValidHeapPointer(const void* x) {
+    #ifdef _MSC_VER
+        return 
+            (x != (void*)0xcccccccc) && (x != (void*)0xdeadbeef) && (x != (void*)0xfeeefeee);
+    #else
+        return x != NULL;
+    #endif
+}
+
+/**
+ Returns true if the pointer is likely to be
+ a valid pointer (instead of an arbitrary number). 
+ Useful for debugging purposes.
+ */
+inline bool isValidPointer(const void* x) {
+    #ifdef _MSC_VER
+        return x != ((void*)0xcccccccc) && (x != (void*)0xdeadbeef) && (x != (void*)0xfeeefeee);
+    #else
+        return x != NULL;
+    #endif
+}
+
+#ifdef _MSC_VER
+#   pragma warning(pop)
+#endif
+
+}
+
+#endif