I need help with displaying an image on a monitor

I have made a code to display an image on a monitor but it doesnt seem to be working.

mon = peripheral.wrap("right")

while true do
	mon.setBackgroundColor(colors.black)
	mon.clear()
	mon.setTextScale(2)
	mon.setCursorPos(2,2)
	mon.setTextColor(colors.yellow)
	mon.write("Welcome Back")
	
	event, side, x, y = os.pullEvent("monitor_touch")

	if x > 1 and x < 12 and y == 2 then
		local image = paintutils.loadImage("right")
		mon.setBackgroundColor(colors.black)
		mon.clear()
		mon.setCursorPos(1,3)
		mon.setTextScale(2)
		mon.setTextColor(colors.yellow)
		mon.write(paintutils.drawImage(image, 3 ,3))
		redstone.setOutput("left", true)
		sleep(5)
		redstone.setOutput("left", false)
		sleep(5)
	end
end

paintutils functions don't return anything you can write to a display. Instead, they directly act on the "current" display; you can set this via term.redirect().

Eg:

local mon = peripheral.wrap("right")
term.redirect(mon)

local image = paintutils.loadImage("right")
paintutils.drawImage(image, 3 ,3)

Two things I noticed - one I'm curious about and one I'd like to point out…

1. Are you loading an image named "right" ? If not, this still won't work. You'll need to specify the path/name of the image file you want to load.

2. I noticed you're setting the monitor cursor position then changing text scale (lines 6 & 7 and lines 17 & 18) - this can have strange results iirc - I recommend setting the text scale first then setting the cursor position.

In fact, I don't think you even need that setCursorPosition call on line 17 just before mon.setTextScale(2) - you're specifying the cursor position in your drawImage call. You also don't need the mon.setTextColor(colors.yellow) call (line 19) as you are already setting it above (on line 8) just before you write text to the monitor.

Thanks for the replys, i havent tested it just yet but i just have 2 quick questions.

Where/How did you learn to write this code?

And where should I enter the code you wrote Bomb Bloke?

Wolvenlp, on 13 June 2016 - 11:41 PM said:

Where/How did you learn to write this code?

By this I assume you mean how/where could I learn to write this code. The answer differs for many, but for ComputerCraft in general, the wiki is a great resource. I used the API list to familiarize myself with the majority of computercraft's APIs, which is extremely important. For non-CC specific lua, I would recommend the lua 5.1 manual. You don't need to memorize all this by any means, you just need to know it exists so that you can search it quickly when you need it. Stack Overflow is also a great resource. I believe there's a series of tutorials out there aimed at beginners, which are helpful.

For many specific tasks, you can find previous ask-a-pro topics (don't necro them though!) and tutorials through a google search of the forums.

As for explaining what BB did in the code shown;

peripheral.wrap
term.redirect
paintutils.loadImage
paintutils.drawImage

Wolvenlp, on 13 June 2016 - 11:41 PM said:

And where should I enter the code you wrote Bomb Bloke?

The first three lines should be placed outside of your loop; they only need to be performed once. The fourth line should be placed at the point in your loop when you wish to draw the image - probably immediately after you clear the screen.

Here is the code:

mon = peripheral.wrap("right")
while true do
mon.setBackgroundColor(colors.black)
mon.clear()
mon.setTextScale(2)
mon.setCursorPos(2,2)
mon.setTextColor(colors.yellow)
mon.write("Welcome Back")
event, side, x, y = os.pullEvent("monitor_touch")
if x > 1 and x < 12 and y == 2 then
mon.setBackgroundColor(colors.black)
mon.clear()
local mon = peripheral.wrap("right")
term.redirect(mon)
local image = paintutils.loadImage("right")
paintutils.drawImage(image, -8,1)
redstone.setOutput("left", true)
sleep(5)
redstone.setOutput("left", false)
sleep(5)
end
end

Here is also what it looks like in-game:
http://imgur.com/z2c52u8

Set your text scale lower (either 1 or 0.5)

Threads merged; you don't need more than one for the one project.