1642 Book Stack
This is a variation of 156h tri-grid, in which the outer loop for y in both tri-lab and tri-hsl has an increment of 30 rather than 100.
This simple modification results in a far more interesting image and should probably be defined as modifiable to enable further exploration
(wash colour: {(col/rgb r: 0.876 g: 0.917 b: 0.040 alpha: 0.443) (gen/col)})
(tri-hsl alpha: {0.691 (gen/stray from: 0.691 by: 0.2)})
(tri-lab alpha: {0.112 (gen/stray from: 0.112 by: 0.1)})
(fn (tri-lab alpha: 1)
(define
w 86.6
h 50
r (prng/build min: -1 max: 1 seed: 231)
colour-scale {271 (gen/stray-int from: 271 by: 10)}
colour-offset (prng/build min: -1 max: 1)
li (interp/build from: [0 1]
to: [{14 (gen/stray-int from: 14 by: 10)}
{68 (gen/stray-int from: 68 by: 10)}])
rma (interp/build from: [0 canvas/width]
to: [{-39 (gen/stray-int from: -39 by: 10)}
{87 (gen/stray-int from: 87 by: 10)}])
rmb (interp/build from: [0 canvas/height]
to: [{2 (gen/stray-int from: 2 by: 10)}
{68 (gen/stray-int from: 68 by: 10)}]))
(loop (y from: 0 upto: canvas/height inc: 30)
(loop (x from: 0 upto: canvas/width inc: (* 2 w))
(define
a (interp/value from: rma t: (+ x (* (prng/value from: colour-offset) colour-scale)))
b (interp/value from: rmb t: (+ y (* (prng/value from: colour-offset) colour-scale))))
(poly coords: [[x (+ y 0)]
[(+ x w) (+ y h)]
[x (+ y h h)]]
colours: [(col/lab l: (interp/value from: li t: (prng/value from: r)) a: a b: b alpha: alpha)
(col/lab l: (interp/value from: li t: (prng/value from: r)) a: a b: b alpha: alpha)
(col/lab l: (interp/value from: li t: (prng/value from: r)) a: a b: b alpha: alpha)])
(poly coords: [[x (+ y 0)]
[(+ x w) (+ y h)]
[(+ x w) (- y h)]]
colours: [(col/lab l: (interp/value from: li t: (prng/value from: r)) a: a b: b alpha: alpha)
(col/lab l: (interp/value from: li t: (prng/value from: r)) a: a b: b alpha: alpha)
(col/lab l: (interp/value from: li t: (prng/value from: r)) a: a b: b alpha: alpha)]))
(loop (x from: w upto: canvas/width inc: (* 2 w))
(define
a (interp/value from: rma t: (+ x (* (prng/value from: colour-offset) colour-scale)))
b (interp/value from: rmb t: (+ y (* (prng/value from: colour-offset) colour-scale))))
(poly coords: [[x (+ y h)]
[(+ x w) (+ y h h)]
[(+ x w) (+ y 0)]]
colours: [(col/lab l: (interp/value from: li t: (prng/value from: r)) a: a b: b alpha: alpha)
(col/lab l: (interp/value from: li t: (prng/value from: r)) a: a b: b alpha: alpha)
(col/lab l: (interp/value from: li t: (prng/value from: r)) a: a b: b alpha: alpha)])
(poly coords: [[x (+ y h)]
[(+ x w) (+ y 0)]
[x (- y h)]]
colours: [(col/lab l: (interp/value from: li t: (prng/value from: r)) a: a b: b alpha: alpha)
(col/lab l: (interp/value from: li t: (prng/value from: r)) a: a b: b alpha: alpha)
(col/lab l: (interp/value from: li t: (prng/value from: r)) a: a b: b alpha: alpha)]))))
(fn (tri-hsl alpha: 1)
(define
w 86.6
h 50
colour-scale {842 (gen/stray-int from: 842 by: 60)}
colour-offset (prng/build min: -1 max: 1)
fn-h (interp/build from: [0 canvas/width]
to: [{15 (gen/stray-int from: 15 by: 10)}
{181 (gen/stray-int from: 181 by: 10)}])
fn-l (interp/build from: [0 canvas/height]
to: [{0.225 (gen/stray from: 0.225 by: 0.2)}
{0.981 (gen/stray from: 0.981 by: 0.1)}]))
(loop (y from: 0 upto: canvas/height inc: 30)
(loop (x from: 0 upto: canvas/width inc: (* 2 w))
(define
a (interp/value from: fn-h t: (+ x (* (prng/value from: colour-offset) colour-scale)))
b (interp/value from: fn-l t: (+ y (* (prng/value from: colour-offset) colour-scale))))
(poly coords: [[x (+ y 0)]
[(+ x w) (+ y h)]
[x (+ y h h)]]
colours: [(col/hsl h: a s: 1 l: b alpha: alpha)
(col/hsl h: a s: 1 l: b alpha: alpha)
(col/hsl h: a s: 1 l: b alpha: alpha)])
(poly coords: [[x (+ y 0)]
[(+ x w) (+ y h)]
[(+ x w) (- y h)]]
colours: [(col/hsl h: a s: 1 l: b alpha: alpha)
(col/hsl h: a s: 1 l: b alpha: alpha)
(col/hsl h: a s: 1 l: b alpha: alpha)]))
(loop (x from: w upto: canvas/width inc: (* 2 w))
(define
a (interp/value from: fn-h t: (+ x (* (prng/value from: colour-offset) colour-scale)))
b (interp/value from: fn-l t: (+ y (* (prng/value from: colour-offset) colour-scale))))
(poly coords: [[x (+ y h)]
[(+ x w) (+ y h h)]
[(+ x w) (+ y 0)]]
colours: [(col/hsl h: a s: 1 l: b alpha: alpha)
(col/hsl h: a s: 1 l: b alpha: alpha)
(col/hsl h: a s: 1 l: b alpha: alpha)])
(poly coords: [[x (+ y h)]
[(+ x w) (+ y 0)]
[x (- y h)]]
colours: [(col/hsl h: a s: 1 l: b alpha: alpha)
(col/hsl h: a s: 1 l: b alpha: alpha)
(col/hsl h: a s: 1 l: b alpha: alpha)]))))
(fn (wash vol: 200
line-width: 70
line-segments: 5
colour: (col/rgb r: 0.627 g: 0.627 b: 0.627 alpha: 0.4)
seed: 272)
(define
w/3 (/ canvas/width 3)
h/3 (/ canvas/height 3))
(loop (d from: -20 to: 1020 inc: 20)
(bezier tessellation: line-segments
line-width: line-width
coords: [[0 (wash-n x: 0 d: d seed: seed vol: vol)]
[w/3 (wash-n x: w/3 d: d seed: seed vol: vol)]
[(* w/3 2) (wash-n x: (* w/3 2) d: d seed: seed vol: vol)]
[canvas/width (wash-n x: canvas/width d: d seed: seed vol: vol)]]
colour: colour)
(bezier tessellation: line-segments
line-width: line-width
coords: [[(wash-n x: 0 d: d seed: seed vol: vol) 0]
[(wash-n x: h/3 d: d seed: seed vol: vol) h/3]
[(wash-n x: (* h/3 2) d: d seed: seed vol: vol) (* h/3 2)]
[(wash-n x: canvas/height d: d seed: seed vol: vol) canvas/height]]
colour: colour)))
(fn (wash-n x: 0 d: 0 seed: 0 vol: 1)
(+ d (* vol (prng/perlin x: x y: d z: seed))))