panda3d-stageflow

Just about every game beyond gameplay prototypes goes through distinct stages: Opening credits, main menu, main game loop, ingame credits, and so on. These can be arranged as a finite state machine, with data being passed between stages.

In addition, each stage, especially the main menu and main game loop, can have certain modes that modify their base functionality, mostly menus that pause the base game; These are called substages.

stageflow implements this basic framework, letting you...

• focus on each Stage and Substage separately,
• re-use Substages over several Stages,
• use premade typical Stages / Substages.

For example: # FIXME: Abstract Panda3DSplash out of the example...

from direct.showbase.ShowBase import ShowBase

from stageflow import Flow
from stageflow.panda3d import Panda3DSplash
from stageflow.prefab import Quit


ShowBase()
base.flow = Flow(
    stages=dict(
        splash=Panda3DSplash(exit_stage='quit'),
        quit=Quit(),
    ),
    initial_stage='splash',
)
base.run()

This example...

• creates a Flow with two stages (named splashes and quit),
• immediately enters the splashes stage, which creates a Task,
• starts Panda3D's main loop,
• lets the Task play the splash until it ends, or escape is pressed,
• transitions to quit, which in turn ends the program.

Installation, etc.

Installation: pip install panda3d-stageflow

Documentation: readthedocs.io

Source and issue tracker: GitHub