Created
October 13, 2015 11:40
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Random art with folder creation
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//Most of this is Phil Trelford's code!! | |
//Gisted to keep it to hand. Add folder creation. | |
//No other dependencies except what is here. | |
open System.IO | |
open System | |
open System.Drawing | |
type expr = | |
| VariableX | |
| VariableY | |
| Constant | |
| Sum of expr * expr | |
| Product of expr * expr | |
| Mod of expr * expr | |
| Well of expr | |
| Tent of expr | |
| Sin of expr | |
| Level of expr * expr * expr | |
| Mix of expr * expr * expr | |
let random = System.Random() | |
let next () = random.NextDouble() | |
let average (c1,c2,w) = | |
let r1,g1,b1 = c1 | |
let r2,g2,b2 = c2 | |
let r = w * r1 + (1.0 - w) * r2 | |
let g = w * g1 + (1.0 - w) * g2 | |
let b = w * b1 + (1.0 - w) * b2 | |
r,g,b | |
let well x = 1.0 - 2.0 / (1.0 + x * x) ** 8.0 | |
let tent x = 1.0 - 2.0 * abs x | |
let rec eval = function | |
| VariableX -> fun (x,y) -> (x,x,x) | |
| VariableY -> fun (x,y) -> (y,y,y) | |
| Constant -> | |
let r,g,b = next(),next(),next() | |
fun (x,y) -> (r,g,b) | |
| Sum(e1,e2) -> | |
let f1,f2 = eval e1, eval e2 | |
fun (x,y) -> | |
average(f1(x,y),f2(x,y),0.5) | |
| Product(e1,e2) -> | |
let f1,f2 = eval e1, eval e2 | |
fun (x,y) -> | |
let r1,g1,b1 = f1(x,y) | |
let r2,g2,b2 = f2(x,y) | |
r1*r2, g1*g2, b1*b2 | |
| Mod(e1,e2) -> | |
let f1,f2 = eval e1, eval e2 | |
fun (x,y) -> | |
let r1,g1,b1 = f1(x,y) | |
let r2,g2,b2 = f2(x,y) | |
r1 % r2, g1 % g2, b1 % b2 | |
| Well(e) -> | |
let f = eval e | |
fun (x,y) -> | |
let r,g,b = f(x,y) | |
well r, well g, well b | |
| Tent(e) -> | |
let f = eval e | |
fun (x,y) -> | |
let r,g,b = f(x,y) | |
tent r, tent g, tent b | |
| Sin(e) -> | |
let f = eval e | |
let phase = next() * System.Math.PI | |
let freq = (next()*5.0)+1.0 | |
fun (x,y) -> | |
let r,g,b = f(x,y) | |
sin(phase + r*freq),sin(phase+g*freq),sin (phase+b*freq) | |
| Level(e1,e2,e3) -> | |
let f1,f2,f3 = eval e1, eval e2, eval e3 | |
let threshold = (next()*2.0) - 1.0 | |
fun (x,y) -> | |
let r1,g1,b1 = f1(x,y) | |
let r2,g2,b2 = f2(x,y) | |
let r3,g3,b3 = f3(x,y) | |
let r = if r1 < threshold then r2 else r3 | |
let g = if g1 < threshold then g2 else g3 | |
let b = if b1 < threshold then b2 else b3 | |
r,g,b | |
| Mix(e1,e2,e3) -> | |
let f1,f2,f3 = eval e1, eval e2, eval e3 | |
let threshold = (next()*2.0) - 1.0 | |
fun (x,y) -> | |
let n, _, _ = f1(x,y) | |
let w = 0.5 * (n + 1.0) | |
let c1 = f2(x,y) | |
let c2 = f3(x,y) | |
average(c1,c2,w) | |
let rec gen k = | |
if k <= 0 || next() < 0.01 then | |
let terminals = [VariableX; VariableY;Constant] | |
terminals.[random.Next(terminals.Length)] | |
else | |
let n () = random.Next(k) | |
let operators = [ | |
fun () -> Sum(gen (n()), gen(n())) | |
fun () -> Product(gen (n()), gen(n())) | |
fun () -> Mod(gen (n()), gen(n())) | |
fun () -> Well(gen (n())) | |
fun () -> Tent(gen (n())) | |
fun () -> Sin(gen (n())) | |
fun () -> Level(gen (n()), gen (n()), gen(n())) | |
fun () -> Mix(gen (n()), gen (n()), gen(n())) | |
] | |
operators.[random.Next(operators.Length)]() | |
#if INTERACTIVE | |
#r "System.Drawing.dll" | |
#endif | |
let rgb (r,g,b) = | |
let r = max 0 (min 255 (int (128.0 * (r + 1.0)))) | |
let g = max 0 (min 255 (int (128.0 * (g + 1.0)))) | |
let b = max 0 (min 255 (int (128.0 * (b + 1.0)))) | |
r,g,b | |
let width, height = 1024, 768 | |
let draw f n = | |
let image = new Bitmap(width, height) | |
use graphics = Graphics.FromImage(image) | |
[|for y in 0..n..height-n do | |
for x in 0..n..width-n -> x,y | |
|] | |
|> Array.Parallel.map (fun (x,y) -> | |
let x' = -1.0 + (((float x+(float n/2.0))*2.0)/float width) | |
let y' = -1.0 + (((float y+(float n/2.0))*2.0)/float height) | |
let r,g,b = f(x',y') | |
let r,g,b = rgb(r,g,b) | |
x,y,r,g,b | |
) | |
|> Array.iter (fun (x,y,r,g,b) -> | |
use pen = new SolidBrush(Color.FromArgb(r,g,b)) | |
graphics.FillRectangle(pen, x, y, n, n) | |
) | |
image | |
//Quick hack to make random folders in order not to overwrite prior ones! | |
let p = new System.Random() | |
let pname = (sprintf @"c:\temp\ArtWork%d\" <| p.Next(1,99999)) | |
let rec pathname (f :DirectoryInfo) = if f.Exists = true then | |
pathname (new System.IO.DirectoryInfo(pname)) | |
else | |
f.Create() | |
f | |
let name = pname |> fun x -> new System.IO.DirectoryInfo(x) |> pathname | |
//Figure out a gradient of colours checker and eliminate black ones. | |
let save n = | |
let e = gen 50 | |
let f = eval e | |
let image = draw f 1 | |
let savename = sprintf@"%sRandom%04d.png" name.FullName n | |
image.Save(savename,Imaging.ImageFormat.Png) | |
for i = 1 to 1000 do save i | |
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