A global table for entity systems to live in.

entities.systems_call(fname,...)

Call the named function on any systems that currently exist. For instance entities.systems_call("load") is used at the bottom of this file to prepare graphics of registered systems.

a bang

donut = entities.systems.donut.add(opts)

Add an donut.

The invading horde

an invader

item = entities.systems.item.add()

items, can be used for general things, EG physics shapes with no special actions

entities.systems.level.setup(level)

reset and setup everything for this level idx

menu = entities.systems.menu.setup()

Create a displayable and controllable menu system that can be fed chat data for user display.

After setup, provide it with menu items to display using menu.show(items) then call update and draw each frame.

a missile

npc = entities.systems.npc.add(opts)

Add an npc.

entities.systems.player.controls(it,fast)

Handle player style movement, so we can reuse this code for player style monsters. it is a player or monster, fast lets us tweak the speed and defaults to 1

movement controls are set in it

it.move which is "left" or "right" to move left or right it.jump which is true if we should jump

score = entities.systems.score.setup()

Create entity that handles the score hud update and display

space = entities.systems.space.setup()

Create the space that simulates all of the physics.

The stars

setup background tile graphics

Handle the main yarn setup update and draw.