finding color value of pixel on screen

[fmra]

Is it possible to check the color values of a pixel at x,y on the screen? I have a table with a list of pixels I'm moving around, but I'd like to be able to check unmapped areas of the screen for pixels without nesting iterators.

[DaedalusYoung]

You can use love.graphics.newScreenshot to get the screen as ImageData, and then use ImageData:getPixel to find the pixel's colour value.

Note that this will create lag when generating the screenshot though, so it's probably best to find another solution.

[veethree]

Draw the stuff to a canvas, Then you can use canvas:getPixel(x, y)

[slime]

Both of those options are incredibly slow for real-time use. It's best to think of the color of pixels on your screen (or in Canvases) as inaccessible through CPU-side code except in certain circumstances (occasional screenshots), and plan accordingly.

[fmra]

yeah, I think I came up with a work around. I created a new table that tallies the x position for each pixel and alters the equations for pixel movement. Insincere, but visually identical to what I was trying to do. Thank you everyone.