common.go

package main

// Direction is a type for the direction enum [for player/enemies]
type Direction int

const (
	// Up ... DIRECTION ENUM [1]
	Up Direction = iota + 1
	// Down ... DIRECTION ENUM [2]
	Down
	// Left ... DIRECTION ENUM [3]
	Left
	// Right ... DIRECTION ENUM [4]
	Right
	// UpLeft ... DIRECTION ENUM [5]
	UpLeft
	// UpRight ... DIRECTION ENUM [6]
	UpRight
	// DownLeft ... DIRECTION ENUM [7]
	DownLeft
	// DownRight ... DIRECTION ENUM [8]
	DownRight
)

func (d Direction) String() string {
	return [...]string{"Unknown", "Up", "Down", "Left", "Right",
		"UpLeft", "UpRight", "DownLeft", "DownRight"}[d]
}

// ^ DIRECTION ENUM ~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~

// Movement is a type for the movement enum [for player/enemies]
type Movement int

const (
	// Idle ... MOVEMENT ENUM [1]
	Idle Movement = iota + 1
	// Walking ... MOVEMENT ENUM [2]
	Walking
	// Running ... MOVEMENT ENUM [3]
	Running
)

func (m Movement) String() string {
	return [...]string{"Unknown", "Idle", "Walking", "Running"}[m]
}

// ^ MOVEMENT ENUM ~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~

const (
	// Pi is pi
	Pi = 3.14159265358979323846264338327950288419716939937510582097494459 // https://oeis.org/A000796
)

// Vec2f is a vector of 2 float64's
type Vec2f struct {
	x float64
	y float64
}

func newVec2f(x float64, y float64) Vec2f {
	return Vec2f{x, y}
}

// Vec2i is a vector of 2 int's
type Vec2i struct {
	x int
	y int
}

func newVec2i(x int, y int) Vec2i {
	return Vec2i{x, y}
}

// Vec2b is a vector of 2 bool's
type Vec2b struct {
	x bool
	y bool
}

func newVec2b(x bool, y bool) Vec2b {
	return Vec2b{x, y}
}

func vec2f(x Vec2i) Vec2f {
	return newVec2f(float64(x.x), float64(x.y))
}

func vec2i(x Vec2f) Vec2i {
	return newVec2i(int(x.x), int(x.y))
}

// Rolumn is a row/column vector
type Rolumn struct {
	row    int
	column int
}

func newRolumn(row int, column int) Rolumn {
	return Rolumn{row, column}
}