Szeliga/pointer_receiver.go

## pointer_receiver.go
  func (a *Vector) Add(b Vector) Vector {
    a.X += b.X
    a.Y += b.Y
    a.Z += b.Z
    return a
  }

## vector_representation.go
package core

import "math"

// Vector - struct holding X Y Z values of a 3D vector
type Vector struct {
  X, Y, Z float64
}
	func (a *Vector) Add(b Vector) Vector {
	a.X += b.X
	a.Y += b.Y
	a.Z += b.Z
	return a
	}
	package core

	import "math"

	// Vector - struct holding X Y Z values of a 3D vector
	type Vector struct {
	X, Y, Z float64
	}