--
-- Starting code for CPSC 449 Assignment 1
--
-- Generate and output a Mondrian-style image as an SVG tag within an HTML
-- document.
--
import System.IO
import Control.Monad (replicateM)
import System.Random (randomRIO, StdGen, randomR, mkStdGen)
--
-- The width and height of the image being generated.
--
width :: Int
width = 1024
height :: Int
height = 768
--
-- Generate and return a list of 20000 random floating point numbers between
-- 0 and 1. (Increase the 20000 if you ever run out of random values).
--
randomList :: Int -> [Float]
randomList seed = take 20000 (rl_helper (mkStdGen seed))
rl_helper :: StdGen -> [Float]
rl_helper g = fst vg : rl_helper (snd vg)
where vg = randomR (0.0, 1.0 :: Float) g
--
-- Compute an integer between low and high from a (presumably random) floating
-- point number between 0 and 1.
--
randomInt :: Int -> Int -> Float -> Int
randomInt low high x = round ((fromIntegral (high - low) * x) + fromIntegral low)
--
-- Generate the tag for a rectangle with random color. Replace the
-- implementation of this function so that it generates all of the tags
-- needed for a piece of random Mondrian art.
--
-- Parameters:
-- x, y: The upper left corner of the region
-- w, h: The width and height of the region
-- r:s:t:rs: A list of random floating point values between 0 and 1
--
-- Returns:
-- [Float]: The remaining, unused random values
-- String: The SVG tags that draw the image
--
mondrian :: Int -> Int -> Int -> Int -> [Float] -> ([Float], String)
mondrian x y w h (r:s:t:rs) =
(rs, "\n")
--
-- The main program which generates and outputs mondrian.html.
--
main :: IO ()
main = do
-- Right now, the program will generate a different sequence of random
-- numbers each time it is run. If you want the same sequence each time
-- use "let seed = 0" instead of "seed <- randomRIO (0, 100000 :: Int)"
--let seed = 0
seed <- randomRIO (0, 100000 :: Int)
let randomValues = randomList seed
let prefix = "\n" ++
"\n"
writeFile "mondrian.html" (prefix ++ image ++ suffix)