//=============================================================================
// Camera.h by Frank Luna (C) 2004 All Rights Reserved.
//=============================================================================

#ifndef CAMERA_H
#define CAMERA_H

#include <d3dx9.h>

// Forward declaration
class Terrain;

class Camera
{
public:
	Camera();

	const D3DXMATRIX& view() const;
	const D3DXMATRIX& proj() const;
	const D3DXMATRIX& viewProj() const;

	const D3DXVECTOR3& right() const;
	const D3DXVECTOR3& up() const;
	const D3DXVECTOR3& look() const;

	D3DXVECTOR3& pos();

	void lookAt(D3DXVECTOR3& pos, D3DXVECTOR3& target, D3DXVECTOR3& up);
	void setLens(float fov, float aspect, float nearZ, float farZ);
	void setSpeed(float s);

	void update(float dt, Terrain* terrain, float offsetHeight);

protected:
	void buildView();

protected:
	D3DXMATRIX mView;
	D3DXMATRIX mProj;
	D3DXMATRIX mViewProj;

	// Relative to world space.
	D3DXVECTOR3 mPosW;
	D3DXVECTOR3 mRightW;
	D3DXVECTOR3 mUpW;
	D3DXVECTOR3 mLookW;

	float mSpeed;
};

#endif // CAMERA_H