#ifndef _TERRAINCONTENTGENERATOR_H__
#define _TERRAINCONTENTGENERATOR_H__

#include "OgreSceneContentGenerator.h"

#define MAX_HEIGHT 5000 // maximal possible height for object position

namespace Ogre {

/** Class which executes a simple ray query.
*/
class __declspec(dllexport) RayQueryExecutor
{
public:
	RayQueryExecutor(SceneManager *sm);
	~RayQueryExecutor();
	
	bool executeRayQuery(Vector3 *result, const Vector3 &pos, const Vector3 &dir);
	bool RayQueryExecutor::executeRayQuery( Vector3 *result, const Ray &ray);

protected:
	
	RaySceneQuery *mRaySceneQuery;
};

/** 
	This class used to fill a terrain with content, e.g., 
	it randomly fills a terrain with objects of a specific type.
*/
class __declspec(dllexport) TerrainContentGenerator: public SceneContentGenerator
{
public:
	TerrainContentGenerator(SceneManager *sm);
	~TerrainContentGenerator();

	/** Generates objects and places it on the terrain.
	*/
	SceneNode *GenerateSceneObject(const Vector3 &position, 
		const Vector3 &rotation, const String &objName);
	/** Generates objects and optionally places it on the terrain.
		@param clampToTerrain if true, scene object is clamped to the terrain
	*/
	SceneNode *GenerateSceneObject(const Vector3 &position, 
		const Vector3 &rotation, const String &objName, const bool clampToTerrain);
	
	/** The offset is added to objects when they are put into the terrain.
	*/
	void SetOffset(Real offset);

protected:
	RayQueryExecutor *mRayQueryExecutor;
	Real mOffset;
};

} // namespace Ogre
#endif // _TERRAINCONTENTGENERATOR_H