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@nst
Last active June 15, 2022 04:58
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# !/usr/bin/env python3
# Nicolas Seriot
# 2022-06-14
# https://seriot.ch/visualization/truchet_2.png
# loosely inspired by https://www.fxhash.xyz/gentk/slug/dirty-interlaced-truchet-tiles-18
import cairo
import math
import random
NB_COLS = 16
NB_ROWS = 16
W = 32
GRID = False
BKG = (241/255., 196./255., 89/255.)
EXT = (169/255., 89/255, 55/255.)
INT = BKG
W_L = 14
W_M = 8
W_S = 4
def draw_arcs(c, rotate):
c.save()
if rotate:
c.translate(W, 0)
c.rotate(math.pi/2.)
for o, a in [(0, 0), (W, math.pi)]:
for (width, color) in [(W_L, EXT), (W_M, INT), (W_S, EXT)]:
c.set_line_width(width)
c.set_source_rgb(*color)
c.arc(o, o, W/2., a, a+math.pi/2.)
c.stroke()
c.restore()
def draw_bridge(c, rotate):
c.save()
if rotate:
c.translate(W, 0)
c.rotate(math.pi/2.0)
for (x1, y1, x2, y2) in [(W/2., 0, W/2., W), (0, W/2., W, W/2.)]:
for (width, color) in [(W_L, EXT), (W_M, INT), (W_S, EXT)]:
c.set_line_width(width)
c.set_source_rgb(*color)
c.move_to(x1, y1)
c.line_to(x2, y2)
c.stroke()
c.restore()
surface = cairo.ImageSurface(cairo.FORMAT_ARGB32, W*NB_COLS, W*NB_ROWS)
c = cairo.Context(surface)
c.set_source_rgb(*BKG)
c.paint()
for col in range(NB_COLS):
for row in range(NB_ROWS):
c.save()
c.translate(col*W, row*W)
arcs_else_bridge = random.choice([True, False])
rotate = random.choice([True, False])
if arcs_else_bridge:
draw_arcs(c, rotate)
else:
draw_bridge(c, rotate)
c.restore()
if GRID:
c.rectangle(col*W, row*W, W, W)
c.stroke()
surface.write_to_png("truchet_2.png")
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