ogrepaginglandscaperayscenequery.h

使用stl技术,(还没看,是听说的)

/***************************************************************************
OgrePagingLandScapeRaySceneQuery.h  -  description
-------------------
begin                : Fri Sep 10 2003
copyright            : (C) 2003 by Jose A Milan
email                : [e-mail]
***************************************************************************/

/***************************************************************************
*                                                                         *
*   This program is free software; you can redistribute it and/or modify  *
*   it under the terms of the GNU Lesser General Public License as        *
*   published by the Free Software Foundation; either version 2 of the    *
*   License, or (at your option) any later version.                       *
*                                                                         *
***************************************************************************/

#ifndef PAGINGLANDSCAPERAYSCENEQUERY_H
#define PAGINGLANDSCAPERAYSCENEQUERY_H

#include "OgrePagingLandScapePrerequisites.h"

namespace Ogre
{

	enum
	{
		// Height will return the height at the origin
		// Distance will always be 0
		RSQ_Height       = 1<<0,

		// AllTerrain will return all terrain contacts
		// along the ray
		RSQ_AllTerrain   = 1<<1,

		// FirstTerrain will return only the first
		// contact along the ray
		RSQ_FirstTerrain = 1<<2,

		// Entities will return all entity contacts along the ray
		RSQ_Entities     = 1<<3,

		// Different resolution scales.  It defaults to 1 unit
		// resolution.  2x resolution tests every 0.5 units
		// 4x tests every 0.25 and 8x every 0.125
		RSQ_8xRes        = 1<<4,
		RSQ_4xRes        = 1<<5,
		RSQ_2xRes        = 1<<6,
		RSQ_1xRes        = 1<<7,

        // Modification Query
        RSQ_MODIF        = 1<<8
	};

	/** PagingLandScape's specialisation of RaySceneQuery.
		if RSQ_Height bit mask is set, RSQ_Terrain and RSQ_Entity bits will be ignored
		Otherwise data will be returned based on the mask
	*/
	class PagingLandScapeRaySceneQuery : public DefaultRaySceneQuery
	{
	protected: 
		//JEFF
		//PagingLandScapeTile* getNonDividedTile(PagingLandScapeTile* tile, const Vector3& origin);
		inline Vector3 getHeightAt(const Vector3& origin);

		std::vector<SceneQuery::WorldFragment*> fragmentList;
		void clearFragmentList()
		{
			std::vector<SceneQuery::WorldFragment*>::iterator cur, end = fragmentList.end();
			for(cur = fragmentList.begin();cur < end;cur++)
			{
				SceneQuery::WorldFragment* frag = (*cur);
				if(frag)
				{
					delete frag;
					frag = 0;
				}
			}
			fragmentList.clear(); 
		}

	public:
		PagingLandScapeRaySceneQuery(SceneManager* creator) : DefaultRaySceneQuery(creator)
		{ 
			mSupportedWorldFragments.insert(SceneQuery::WFT_SINGLE_INTERSECTION);
		}

		~PagingLandScapeRaySceneQuery()
		{
			clearFragmentList();
		}

		/** See RaySceneQuery. */
		void execute(RaySceneQueryListener * listener);

	private:

	};

} // namespace Ogre


#endif