basic_vector_math.go

type Vector struct {
  y, x float64
}

func (self *Vector) Normalize() {
  length := self.Length()
  self.y /= length
  self.x /= length
}

func (self *Vector) Length() float64 {
  return math.Sqrt((self.x * self.x) + (self.y * self.y))
}

func (self *Vector) Minus(other Vector) (result Vector) {
  return Vector{x: (self.x - other.x), y: (self.y - other.y)}
}

func (self *Vector) MultiplyNum(other float64) (result Vector) {
  return Vector{x: (self.x * other), y: (self.y * other)}
}