-- Arcade physics, from the catalogue:  a ball that bounces, bricks that break, a paddle the keys
-- move, and a life lost when the ball is missed.  world2d with no gravity.
return {
	title  = "Author test:  breakout",
	size   = { w = 720, h = 480 },
	layers = { { kind = "world2d", gravity = 0 } },
	vars   = { score = 0, lives = 3, broken = 0 },

	kinds = {
		wall   = { look = { kind = "box", w = 20, h = 480, r = 90, g = 90, b = 110 }, behaviours = { { kind = "solid" } } },
		roof   = { look = { kind = "box", w = 720, h = 20, r = 90, g = 90, b = 110 }, behaviours = { { kind = "solid" } } },
		paddle = { look = { kind = "box", w = 100, h = 14, r = 230, g = 230, b = 240 },
		           behaviours = { { kind = "keys", player = 1, left = "LEFT", right = "RIGHT" }, { kind = "mover", speed = 400, clamp = true }, { kind = "solid", moving = true } } },
		ball   = { look = { kind = "box", w = 14, h = 14, r = 255, g = 220, b = 80 },
		           behaviours = { { kind = "body", shape = "sphere", mass = 1, bounce = 1, friction = 0 } } },
		brick  = { look = { kind = "box", w = 60, h = 20, r = 220, g = 90, b = 90 }, behaviours = { { kind = "solid" } } },
		readout = { look = { kind = "text", text = "", r = 235, g = 235, b = 245 } }
	},

	rooms = {
		{ name = "court",
		  entities = {
			{ kind = "wall",    id = "wallL",   x = 10,  y = 240 },
			{ kind = "wall",    id = "wallR",   x = 710, y = 240 },
			{ kind = "roof",    id = "roof",    x = 360, y = 10  },
			{ kind = "brick",   id = "brick1",  x = 200, y = 100 },
			{ kind = "brick",   id = "brick2",  x = 280, y = 100 },
			{ kind = "brick",   id = "brick3",  x = 360, y = 100 },
			{ kind = "brick",   id = "brick4",  x = 440, y = 100 },
			{ kind = "brick",   id = "brick5",  x = 520, y = 100 },
			{ kind = "paddle",  id = "paddle",  x = 360, y = 440 },
			{ kind = "ball",    id = "ball",    x = 360, y = 380 },
			{ kind = "readout", id = "readout", x = 30,  y = 30  }
		  } }
	},

	rules = {
		{ note = "Serve",
		  on   = "roomStart",
		  act  = { { "push", entity = "ball", x = 120, y = -380 } } },

		{ note = "A brick breaks",
		  on   = "collision", a = "ball", b = "brick",
		  act  = { { "destroy", entity = "other" }, { "addScore", amount = 10 }, { "addVar", name = "broken", amount = 1 } } },

		{ note = "The ball is missed",
		  on   = "frame",
		  when = { { "test", expr = "ball.y > 500" } },
		  act  = { { "addVar", name = "lives", amount = -1 }, { "moveTo", entity = "ball", x = 360, y = 380 }, { "push", entity = "ball", x = -100, y = -380 } } },

		{ note = "The readout, every frame",
		  on   = "frame",
		  act  = { { "setText", entity = "readout", text = '"score " .. score .. "  lives " .. lives' } } }
	}
}