herd

type App ¶

type App struct {
	Manager    *Manager
	SystemInfo *SystemInfo
	// contains filtered or unexported fields
}

An App incapsulated all game logic and rendering. An App provides methods to adding systems and renderers and also implements ebiten.Game interface

func NewApp() *App

func (app *App) AddRenderers(renderers ...Renderer) error

func (app *App) AddStartups(startups ...Startup) error

func (app *App) AddSystems(systems ...System) error

func (app *App) Draw(screen *ebiten.Image)

func (app *App) Layout(w, h int) (int, int)

func (app *App) Update() error

type EntityID ¶

type EntityID int

type Manager ¶

type Manager struct {
	// contains filtered or unexported fields
}

func (c *Manager) Spawn(bundle any)

type Query ¶

type Query[T any] struct {
	// contains filtered or unexported fields
}

func NewQuery[T any](app *App) (Query[T], error)

func (q Query[T]) ForEach(f func(t *T))

func (q Query[T]) Iterate(f func(id EntityID, t *T) bool)

type Renderer ¶

type Renderer func(*ebiten.Image)

Renderer is a system that draws something every frame

type Startup ¶

type Startup func() (bool, error)

Startup is a initilize system that updates after App started. Startup system should return (true, nil) when initialisation finished successul

type System ¶

type System func() error

System is a basic system that updates every tick after App initialization is finished

type SystemInfo ¶

type SystemInfo struct {
	Entities int
	Bounds   image.Rectangle
}