data-the-game.lua

local background = display.newImage( "grass.png" )

local screen = {
	top = display.screenOriginY,
	bottom = display.viewableContentHeight + display.screenOriginY,
	left = display.screenOriginX,
	right = display.viewableContentWidth + display.screenOriginX,
}
	screen.width = screen.right - screen.left

local plane = {
	dx = 0,
	dy = 0,
	gravity = 0.01,
	x = display.contentWidth * 0.5,
	y = display.contentHeight * 0.5,
	obj = display.newImage( "plane.png", display.contentWidth * 0.5, display.contentHeight * 0.5 - 40),
}
local buttons = {
	buttons = {},
	num_of_buttons = 3
}
	buttons.create = function()
		width = screen.width - 10
		for i=1,buttons.num_of_buttons do
			b = display.newRoundedRect(
				screen.left + screen.width * (i -1) / 3 + 5,
				screen.bottom - width / 3,
				width / 3 - 5, 
				width / 3 - 5,
				10
			)
			buttons.paint(b)
			
			b.l = b.x - b.width / 2
			b.r = b.x + b.width / 2
			b.t = b.y - b.height / 2
			b.b = b.y + b.height / 2
			
			b.set_Color = function(b, r, g, b)
				b.setFillColor(r, g, b)
			end
			
			buttons.buttons[i] = b
		end
	end
	
	buttons.paint = function(button)
		button:setFillColor(255, 0, 0)
		button.strokeWidth = 6
		button:setStrokeColor(200, 200, 200, 255)
	end
	
	--< >
	buttons.checkForTouch = function(e)
		for k,b in pairs(buttons.buttons) do
			b.isPressed = e.x < b.r and
			   e.x > b.l and
			   e.y > b.t and
			   e.y < b.b
			if b.isPressed then
				b:setFillColor(0, 255, 0)
			else
				b:setFillColor(255, 0, 0)
			end
		end
	end
	
	buttons.cancelPresses = function(e)
		for k,b in pairs(buttons.buttons) do
			b.isPressed = false
			b:setFillColor(255, 0, 0)
		end
	end
	
local function onTouch(event)
	if event.phase == 'began' or event.phase == 'moved' then
		buttons.checkForTouch(event)
	end
	if event.phase == 'ended' then
		buttons.cancelPresses()
	end
end

local function onEnterFrame()
	noneButtonsPressed = true
	for k,b in pairs(buttons.buttons) do
		if b.isPressed then
			noneButtonsPressed = false
			if k == 1 then plane.obj.rotation = plane.obj.rotation - 10 end
			if k == 2 then plane.obj.rotation = plane.obj.rotation + 10 end
			if k == 3 then
				rot = math.rad(plane.obj.rotation + 270)
				plane.dx = plane.dx + math.cos(rot) / 2
				plane.dy = plane.dy + math.sin(rot) / 2
			end
		end
	end
	if noneButtonsPressed then
		plane.dx = plane.dx * 0.96
        plane.dy = plane.dy * 0.96
	end
	plane.obj:translate(plane.dx, plane.dy)
end

-- Initialize
buttons.create()
Runtime:addEventListener("touch", onTouch)
Runtime:addEventListener("enterFrame", onEnterFrame);