From ab8278e3b61e009253e34d13d6706da7702dbb6c Mon Sep 17 00:00:00 2001
From: Elisey Puzko <puzko.e02@gmail.com>
Date: Fri, 23 Feb 2018 11:51:09 +0300
Subject: Bare-bones face detection for a block placement

---
 src/Vector.hpp | 26 ++++++++++++++++++++++++++
 1 file changed, 26 insertions(+)

(limited to 'src/Vector.hpp')

diff --git a/src/Vector.hpp b/src/Vector.hpp
index 5795db2..aa79ef0 100644
--- a/src/Vector.hpp
+++ b/src/Vector.hpp
@@ -31,6 +31,24 @@ struct Vector3 {
 		std::swap(z, rhs.z);
 	}
 
+	T dot(const Vector3 &rhs) const {
+		return x*rhs.x + y*rhs.y + z*rhs.z;
+	}
+
+	double cosBetween(const Vector3<T> &rhs) const {
+		return dot(rhs) / GetLength() / rhs.GetLength();
+	}
+
+	Vector3<double> normalize() {
+		auto length = GetLength();
+
+		return Vector3<double> (
+				x / length,
+				y / length,
+				z / length
+		);
+	}
+
 	Vector3 &operator=(Vector3 rhs) noexcept {
 		rhs.swap(*this);
 		return *this;
@@ -68,6 +86,14 @@ struct Vector3 {
 		);
 	}
 
+	Vector3 operator-() const {
+		return Vector3<T> (
+				-x,
+				-y,
+				-z
+		);
+	}
+
 	Vector3 operator*(const Vector3 &rhs) const {
 		return Vector3<T>(
 				x * rhs.x,
-- 
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