package doodle import "git.kirsle.net/apps/doodle/events" // Scene is an abstraction for a game mode in Doodle. The app points to one // scene at a time and that scene has control over the main loop, and its own // state information. type Scene interface { Name() string Setup(*Doodle) error Destroy() error // Loop should update the scene's state but not draw anything. Loop(*Doodle, *events.State) error // Draw should use the scene's state to figure out what pixels need // to draw to the screen. Draw(*Doodle) error } // Goto a scene. First it unloads the current scene. func (d *Doodle) Goto(scene Scene) error { // Teardown existing scene. if d.scene != nil { d.scene.Destroy() } log.Info("Goto Scene") d.scene = scene return d.scene.Setup(d) }