Constellation/main.lua at master · jasconius/Constellation · GitHub

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image = display.newImage("Red1.png")

clicks = {}
lines = {}

function tap(event)

	local click = {}

	click.x = (event.x - image.x)
	click.y = (event.y - image.y)

	table.insert(clicks, click)

	local log = "{ "

	for i = 1,#clicks do

		log = log .. clicks[i].x .. "," .. clicks[i].y .. ", "

	end

	log = log .. " }"

	if #clicks > 1 then

		local line = display.newLine(event.x, event.y, clicks[#clicks-1].x + image.x, clicks[#clicks-1].y + image.y)
		line:setColor( 255, 255, 255, 255 )
		line.width = 2

		table.insert(lines, line)

	end

	print(log)

end

image.x = 160
image.y = 240

local myRectangle = display.newRect(image.x - image.width / 2, image.y - image.height / 2, image.width, image.height)
myRectangle.strokeWidth = 3
myRectangle:setFillColor(140, 140, 140)
myRectangle:setStrokeColor(180, 180, 180)

image:addEventListener("tap", tap)
image:toFront()

function undo(event)

	if #clicks > 0 then

		table.remove(clicks, #clicks)

		if #lines > 0 then

			lines[#lines]:removeSelf()

			table.remove(lines, #lines)

		end

	end

end

local btnUndo = display.newImage("btn_undo.png")
btnUndo.x = 220
btnUndo.y = 80
btnUndo:addEventListener("tap", undo)

function reset(event)

	clicks = {}

	for i = 1, #lines do
		lines[i]:removeSelf()
	end

	lines = {}

end

local btnReset = display.newImage("btn_reset.png")
btnReset.x = 120
btnReset.y = 80
btnReset:addEventListener("tap", reset)