truchet_blendmode.py

from coldtype import *
from coldtype.fx.skia import precompose

# inspired by https://mauricemeilleur.net/truchet_tiles

rs = random_series(0, 3)
rs2 = random_series()

tr = Rect(100)
tn = 8

at = AsciiTimeline(8, 30, """
                                    <
[0 ]    [0 ]     [0]       [0  ]
 [1  ]   [1  ]     [1 ]    [1  ]
  [2  ] [2 ]        [2  ]  [2  ]
""")

eases = ["beo", "eeo", "ceo"]
colors = [hsl(0.17, 0.8), hsl(0.6, 0.8), hsl(0.95, 0.8)]

@animation((tr.w*tn, tr.w*tn), tl=at, bg=1)
def truchet1(f):
    def rotate(i, p):
        #row, col = i//tn, i%tn
        (p.rotate(90*int(rs[i]))
            .rotate(f.t.ki(i%3).ec(eases[i%3], rng=(0, 90)))
            .f(colors[i%3])
            .blendmode(BlendMode.Cycle(7))
            )

    return (P(tr)
        .difference(P()
            #.m(tr.pne).l(tr.pse).l(tr.pnw).cp()
            .append(P().oval(tr).t(tr.w/2))
            #.append(P().oval(tr).t(-tr.w/2))
            )
        .f(0)
        .data(frame=tr)
        .layer(tn)
        .spread()
        .layer(tn)
        .stack()
        .mapv(rotate)
        .insert(0, P(f.a.r).f(0))
        .ch(precompose(f.a.r)))

def release(passes):
    from coldtype.renderable.animation import gifski
    gifski(truchet1, passes)
    print("/release")