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