Terrain.h
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Terrain.h
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	#ifndef ECHO_TERRAIN_H
	#define ECHO_TERRAIN_H

	#include <echo/Graphics/SceneEntity.h>

	namespace Echo
	{
	class MeshManager;
	class TextureManager;
	class Texture;
	class Mesh;

	class Terrain : public SceneEntity
	{
	public:
	struct PixelModes
	{
	enum _
	{
	PIXEL_IS_VERTEX, ///Each pixel is a vertex.
	PIXEL_IS_QUAD ///Each pixel represents the centre of a quad.
	///mResolution determines the size of each quad.
	};
	};
	typedef PixelModes::_ PixelMode;
	Terrain(const std::string& terrainName, MeshManager& meshManager, TextureManager& textureManager);
	~Terrain();

	void SetTexture(const std::string& textureName);

	/**
	* Set the pixel mode for the terrain.
	* @see PixelModes.
	* @param pixelMode
	*/
	void SetPixelMode(PixelMode pixelMode);

	/**
	* Set the resolution that each pixel represents.
	* @param resolution
	*/
	void SetResolution(const Vector3& resolution);

	/**
	* Update the internal mesh.
	*/
	void UpdateMesh();


	virtual void Render(const Matrix4& transform, RenderTarget& renderTarget) override;
	private:
	/**
	* Build the mesh using vertex mode.
	*/
	void BuildVertexMesh();

	/**
	* Build the mesh using quad mode.
	*/
	void BuildQuadMesh();
	MeshManager& mMeshManager;
	TextureManager& mTextureManager;
	bool mMeshOutOfDate;
	PixelMode mPixelMode;
	Vector3 mResolution;
	shared_ptr<Texture> mTexture;
	};
	}
	#endif