Camera.h

#pragma once
#include <windows.h>
#include <d3d11_1.h>
#include <d3dcompiler.h>
#include <directxmath.h>
#include "Input.h"

#define MOVEMENTSPEED 4.0f

using namespace DirectX;

class Camera
{
protected:
	XMFLOAT3 _eye;
	XMFLOAT3 _at;
	XMFLOAT3 _up;

	FLOAT _windowWidth;
	FLOAT _windowHeight;
	FLOAT _nearDepth;
	FLOAT _farDepth;

	XMFLOAT4X4 _view;
	XMFLOAT4X4 _projection;
	//this makes this class abstract, requiring this method.
	//gathered this technique from the following source: 
	//https://www.simplilearn.com/tutorials/cpp-tutorial/abstract-class-in-cpp#:~:text=An%20abstract%20class%20in%20C%2B%2B%20is%20one%20that,become%20an%20abstract%20class%20in%20its%20own%20right.
	virtual void UpdateView() = 0;

	//TODO: add billboard to render for when camera is not in use.

public:
	Camera() {} 
	~Camera();

	//this class is abstract, should never be constructed
	virtual void Update(Input* nextInput, float nextT) = 0;

	void SetPosition(XMFLOAT3 position) { _eye = position; }
	void SetLookAt(XMFLOAT3 at) { _at = at; }
	void SetUp(XMFLOAT3 up) { _up = up; }

	XMFLOAT3 GetPosition() { return _eye; }
	XMFLOAT3 GetLookAt() { return _at; }
	XMFLOAT3 GetUp() { return _up; }

	XMFLOAT4X4 GetView() { return _view; }
	XMFLOAT4X4 GetProjection() { return _projection; }
	XMFLOAT4X4 GetCombinedViewProjection();

	void Reshape(FLOAT windowWidth, FLOAT windowHeight, FLOAT nearDepth, FLOAT farDepth);
};