action cc_callback design-resolution animation initial smoke-test-project third-party-tools animationcache callbacks callfunc child-parent director dragon-bones event event-processing events ffmpeg files gifsicle image-processing imagemagick installation keyboard-processing links memory-management moveto plist project-structure removeself resolutionpolicy resources scene scrolling sequence sprite spriteframecache static-images stdbind tag texturepacker textures tiled tileset tmxmap