From e37109f7b90355e25dfc6a80619ba9e4b6a72adf Mon Sep 17 00:00:00 2001
From: hanemile <hanemile@protonmail.com>
Date: Thu, 13 Dec 2018 14:16:20 +0100
Subject: Copied the stucts from /Source making them more available by other
 containers.

---
 vector2D.go | 71 +++++++++++++++++++++++++++++++++++++++++++++++++++++++++++++
 1 file changed, 71 insertions(+)
 create mode 100644 vector2D.go

(limited to 'vector2D.go')

diff --git a/vector2D.go b/vector2D.go
new file mode 100644
index 0000000..6beedb2
--- /dev/null
+++ b/vector2D.go
@@ -0,0 +1,71 @@
+package structs
+
+import (
+	"math"
+)
+
+type Vec2 struct {
+	X, Y float64
+}
+
+// newVec2 returns a new Vec2 using the given coordinates
+func newVec2(x float64, y float64) *Vec2 {
+	return &Vec2{
+		X: x,
+		Y: y,
+	}
+}
+
+// creates a copy of the vector
+func (v *Vec2) Copy() Vec2 {
+	return Vec2{v.X, v.Y}
+}
+
+func (v *Vec2) Split() (x float64, y float64) {
+	return v.X, v.Y
+}
+
+// changes the length of the vector to the length l
+func (v *Vec2) SetLength(l float64) {
+	var k = l / v.GetLength()
+	var newV = v.Multiply(k)
+	//	v = newV
+	v.X, v.Y = newV.Split()
+}
+
+// changes the length of the vector to the length 1
+func (v *Vec2) SetLengthOne() {
+	v.SetLength(1)
+}
+
+// returns the direction Vector of this vector. This means a copy of this vector with a length of 1
+func (v *Vec2) GetDirVector() Vec2 {
+	var dirV = v.Copy()
+	dirV.SetLengthOne()
+	return dirV
+}
+
+// returns the length of the vector
+func (v *Vec2) GetLength() float64 {
+	return math.Sqrt(math.Pow(v.X, 2) + math.Pow(v.Y, 2))
+}
+
+// returns the product of the vector and a scalar s
+func (v *Vec2) Multiply(s float64) Vec2 {
+	return Vec2{v.X * s, v.Y * s}
+}
+
+// returns the quotient of the vector and a scalar s
+func (v *Vec2) Divide(s float64) Vec2 {
+	return Vec2{v.X / s, v.Y / s}
+}
+
+// returns the sum of this vector and the vector v2
+func (v1 *Vec2) Add(v2 Vec2) Vec2 {
+	return Vec2{v1.X + v2.X, v1.Y + v2.Y}
+}
+
+// returns the difference of this vector minus the vector v2
+func (v1 *Vec2) Subtract(v2 Vec2) Vec2 {
+	return Vec2{v1.X - v2.X, v1.Y - v2.Y}
+}
-- 
cgit 1.4.1