C++ Episode 7 Solution

Vector3.cpp

#include "Vector3.h"

#include <stdio.h>

namespace Math
{
	float Dot(Vector3 a, Vector3 b)
	{
		return a.x * b.x + a.y * b.y + a.z * b.z;
	}

	Vector3 Scale(Vector3 vector, float scaleFactor)
	{
		return Vector3 { 
			vector.x * scaleFactor, 
			vector.y * scaleFactor, 
			vector.z * scaleFactor 
		};
	}

	Vector3 Add(Vector3 a, Vector3 b)
	{
		return Vector3 {
			a.x + b.x,
			a.y + b.y,
			a.z + b.z
		};
	}

	void Print(Vector3 vector)
	{
		printf("X: %2.3f, Y: %2.3f, Z: %2.3f\n", vector.x, vector.y, vector.z);
	}

	float Dot(Vector2 a, Vector2 b)
	{
		return a.x * b.x + a.y * b.y;
	}

	Vector2 Scale(Vector2 vector, float scaleFactor)
	{
		return Vector2 {
			vector.x * scaleFactor,
			vector.y * scaleFactor
		};
	}

	Vector2 Add(Vector2 a, Vector2 b)
	{
		return Vector2 {
			a.x + b.x,
			a.y + b.y
		};
	}

	void Print(Vector2 vector)
	{
		printf("X: %2.3f, Y: %2.3f\n", vector.x, vector.y);
	}
}

Vector3.h

#pragma once

struct Vector3
{
	float x;
	float y;
	float z;
};

struct Vector2
{
	float x;
	float y;
};

namespace Math
{
	// Dot Product: a.x * b.x + a.y * b.y + a.z * b.z + ..
	float Dot(Vector3 a, Vector3 b);
	Vector3 Scale(Vector3 vector, float scaleFactor);
	Vector3 Add(Vector3 a, Vector3 b);
	void Print(Vector3 vector);

	float Dot(Vector2 a, Vector2 b);
	Vector2 Scale(Vector2 vector, float scaleFactor);
	Vector2 Add(Vector2 a, Vector2 b);
	void Print(Vector2 vector);
}