#pragma once

#include "Engine.hpp"
#include "Point.hpp"
#include <cmath>


constexpr float DegToRad(float degrees)
{
	return degrees * (float)M_PI / 180.0f;
}


class Camera
{
public:
	Camera()
	{
		position.x = 0.0f;
		position.y = 0.0f;
		position.z = 0.0f;

		rotation.x = 0.0f;
		rotation.y = 0.0f;
		rotation.z = 0.0f;

		zClipBias0 =
			(CAMERA_FAR_CLIP + CAMERA_NEAR_CLIP)
			/ (CAMERA_FAR_CLIP - CAMERA_NEAR_CLIP);

		zClipBias1 =
			(-2.0f * CAMERA_FAR_CLIP * CAMERA_NEAR_CLIP)
			/ (CAMERA_FAR_CLIP - CAMERA_NEAR_CLIP);

		xZoom = 1.0f / tanf(DegToRad(CAMERA_FOV / 2.0f));
		yZoom = (xZoom * WINDOW_WIDTH) / WINDOW_HEIGHT;

		xScale = (0.5f * WINDOW_WIDTH) - 0.5f;
		yScale = (0.5f * WINDOW_HEIGHT) - 0.5f;
	}

	Point position;
	Point rotation;
	float zClipBias0, zClipBias1;
	float xZoom, yZoom;
	float xScale, yScale;
};