Readd CSceneCollisionManager with only the method we need

source/Irrlicht/CSceneCollisionManager.h

@@ -0,0 +1,41 @@
+// Copyright (C) 2002-2012 Nikolaus Gebhardt
+// This file is part of the "Irrlicht Engine".
+// For conditions of distribution and use, see copyright notice in irrlicht.h
+
+#ifndef __C_SCENE_COLLISION_MANAGER_H_INCLUDED__
+#define __C_SCENE_COLLISION_MANAGER_H_INCLUDED__
+
+#include "ISceneCollisionManager.h"
+#include "ISceneManager.h"
+#include "IVideoDriver.h"
+
+namespace irr
+{
+namespace scene
+{
+
+	class CSceneCollisionManager : public ISceneCollisionManager
+	{
+	public:
+
+		//! constructor
+		CSceneCollisionManager(ISceneManager* smanager, video::IVideoDriver* driver);
+
+		//! destructor
+		virtual ~CSceneCollisionManager();
+
+		//! Returns a 3d ray which would go through the 2d screen coordinates.
+		virtual core::line3d<f32> getRayFromScreenCoordinates(
+			const core::position2d<s32> & pos, const ICameraSceneNode* camera = 0) _IRR_OVERRIDE_;
+
+	private:
+
+		ISceneManager* SceneManager;
+		video::IVideoDriver* Driver;
+	};
+
+
+} // end namespace scene
+} // end namespace irr
+
+#endif