[11902] Import Recast Navigation

Import Recast Navigation as third party dependency
Credits go to Mikko Mononen memon at inside dot org

dep/recastnavigation/RecastDemo/Include/SampleInterfaces.h

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+//
+// Copyright (c) 2009-2010 Mikko Mononen memon@inside.org
+//
+// This software is provided 'as-is', without any express or implied
+// warranty.  In no event will the authors be held liable for any damages
+// arising from the use of this software.
+// Permission is granted to anyone to use this software for any purpose,
+// including commercial applications, and to alter it and redistribute it
+// freely, subject to the following restrictions:
+// 1. The origin of this software must not be misrepresented; you must not
+//    claim that you wrote the original software. If you use this software
+//    in a product, an acknowledgment in the product documentation would be
+//    appreciated but is not required.
+// 2. Altered source versions must be plainly marked as such, and must not be
+//    misrepresented as being the original software.
+// 3. This notice may not be removed or altered from any source distribution.
+//
+
+#ifndef SAMPLEINTERFACES_H
+#define SAMPLEINTERFACES_H
+
+#include "DebugDraw.h"
+#include "Recast.h"
+#include "RecastDump.h"
+#include "PerfTimer.h"
+
+// These are example implementations of various interfaces used in Recast and Detour.
+
+// Recast build context.
+class BuildContext : public rcContext
+{
+	TimeVal m_startTime[RC_MAX_TIMERS];
+	int m_accTime[RC_MAX_TIMERS];
+
+	static const int MAX_MESSAGES = 1000;
+	const char* m_messages[MAX_MESSAGES];
+	int m_messageCount;
+	static const int TEXT_POOL_SIZE = 8000;
+	char m_textPool[TEXT_POOL_SIZE];
+	int m_textPoolSize;
+	
+public:
+	BuildContext();
+	virtual ~BuildContext();
+	
+	// Dumps the log to stdout.
+	void dumpLog(const char* format, ...);
+	// Returns number of log messages.
+	int getLogCount() const;
+	// Returns log message text.
+	const char* getLogText(const int i) const;
+	
+protected:	
+	// Virtual functions for custom implementations.
+	virtual void doResetLog();
+	virtual void doLog(const rcLogCategory /*category*/, const char* /*msg*/, const int /*len*/);
+	virtual void doResetTimers();
+	virtual void doStartTimer(const rcTimerLabel /*label*/);
+	virtual void doStopTimer(const rcTimerLabel /*label*/);
+	virtual int doGetAccumulatedTime(const rcTimerLabel /*label*/) const;
+};
+
+// OpenGL debug draw implementation.
+class DebugDrawGL : public duDebugDraw
+{
+public:
+	virtual void depthMask(bool state);
+	virtual void begin(duDebugDrawPrimitives prim, float size = 1.0f);
+	virtual void vertex(const float* pos, unsigned int color);
+	virtual void vertex(const float x, const float y, const float z, unsigned int color);
+	virtual void end();
+};
+
+// stdio file implementation.
+class FileIO : public duFileIO
+{
+	FILE* m_fp;
+	int m_mode;
+public:
+	FileIO();
+	virtual ~FileIO();
+	bool openForWrite(const char* path);
+	bool openForRead(const char* path);
+	virtual bool isWriting() const;
+	virtual bool isReading() const;
+	virtual bool write(const void* ptr, const size_t size);
+	virtual bool read(void* ptr, const size_t size);
+};
+
+#endif // SAMPLEINTERFACES_H
+