Scene support

Basics

• Each game contains one or more scenes.

• Each scene contains one or more backdrops

  Multiple backdrops support (in one scene) is mainly for backward compatibility, and not recommended in most cases

• Each scene contains zero or more sprites

• Each scene contains zero or more widgets

• Each scene contains its own map-size setting

• Each scene contains its own script / code

Existed Problems

• How to support "Each scene contains its own script / code"

• Scene-related APIs

  • class Scene & coresponding classfile
  • Scene related events

• What happens when scene switched

• Common use cases with scene

  • Keep sprite state
  • Data passing among scenes