#pragma once

#include "Vec4.hpp"

class Mat44
{
public:
	Mat44()
	{
		//@formatter:off
		m[0][0] = 1.0f; m[0][1] = 0.0f; m[0][2] = 0.0f; m[0][3] = 0.0f;
		m[1][0] = 0.0f; m[1][1] = 1.0f; m[1][2] = 0.0f; m[1][3] = 0.0f;
		m[2][0] = 0.0f; m[2][1] = 0.0f; m[2][2] = 1.0f; m[2][3] = 0.0f;
		m[3][0] = 0.0f; m[3][1] = 0.0f; m[3][2] = 0.0f; m[3][3] = 1.0f;
		//@formatter:on
	}


	Mat44 operator*(Mat44 const& rhs)
	{
		Mat44 result;

		for (int row = 0; row < 4; ++row)
		{
			for (int col = 0; col < 4; ++col)
			{
				float sum = 0.0f;

				for (int i = 0; i < 4; ++i)
				{
					sum += m[row][i] * rhs.m[i][col];
				}

				result.m[row][col] = sum;
			}
		}

		return result;
	}


	Vec4 operator*(Vec4 const& rhs)
	{
		return Vec4(
			(rhs.x * m[0][0]) + (rhs.y * m[0][1]) + (rhs.z * m[0][2]) + (rhs.w * m[0][3]),
			(rhs.x * m[1][0]) + (rhs.y * m[1][1]) + (rhs.z * m[1][2]) + (rhs.w * m[1][3]),
			(rhs.x * m[2][0]) + (rhs.y * m[2][1]) + (rhs.z * m[2][2]) + (rhs.w * m[2][3]),
			(rhs.x * m[3][0]) + (rhs.y * m[3][1]) + (rhs.z * m[3][2]) + (rhs.w * m[3][3]));
	}


	float m[4][4];
};