ストワで始めるLua第三回のコード

lua3

data={}
maxh=property.getNumber("max")
minh=property.getNumber("min")
w,h=0,0

function onTick()
    local i
    if w~=0 then
    	table.insert(data,input.getNumber(1))
    	if #data>w then
    		table.remove(data,1)
    	end
    end
end

function onDraw()
	local i,number2pixel
	w=screen.getWidth()
	h=screen.getHeight()
	
	number2pixel=h/(maxh-minh)
	
	if #data>0 then 
		screen.drawText(0,0,data[#data])
	end
	
	if #data>=2 then
		for i=2,#data do
			screen.drawLine(i-1,h-(data[i-1]-minh)*number2pixel,i,h-(data[i]-minh)*number2pixel)
		end
	end
end