kopia lustrzana https://github.com/villares/sketch-a-day
134 wiersze
4.0 KiB
Python
134 wiersze
4.0 KiB
Python
# Alexandre B A Villares - https://abav.lugaralgum.com/sketch-a-day
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# More explorations of lines in grids
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from random import shuffle
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from itertools import product, combinations, permutations, combinations_with_replacement
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from gif_exporter import gif_export
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add_library('GifAnimation')
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space, border = 40, 40
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position = 0 # initial position
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def setup():
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global line_combos, W, H, position, num
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size(840, 480)
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frameRate(1)
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rectMode(CENTER)
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strokeWeight(1.5)
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grid = product(range(-1, 2), repeat=2) # 3X3
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# all line permutations on a grid
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lines = permutations(grid, 2)
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# allow only some lines
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possible_lines = []
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for l in lines:
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(x0, y0), (x1, y1) = l[0], l[1]
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if dist(x0, y0, x1, y1) < 2: # rule defined here...
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possible_lines.append(l)
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num_possible_lines = len(possible_lines)
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println("Number of possible lines: {}".format(num_possible_lines))
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# main stuff
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line_combos = list(combinations(possible_lines, 4))
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# shuffle(line_combos) # ucomment to shuffle!
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num = len(line_combos)
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println("Number of permutations: {}".format(num))
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W = (width - border * 2) // space
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H = (height - border * 2) // space
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println("Cols: {} Rows: {} Visible grid: {}".format(W, H, W * H))
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def draw():
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global position
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background(240)
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i = position
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for y in range(H):
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for x in range(W):
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if i < len(line_combos):
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pushMatrix()
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translate(border / 2 + space + space * x,
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border / 2 + space + space * y)
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# translate(border + space + space * x,
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# border + space + space * y)
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draw_combo(i)
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popMatrix()
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i += 1
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if i < len(line_combos):
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gif_export(GifMaker, SKETCH_NAME)
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# gif_export(GifMaker, SKETCH_NAME[:-1] + "b") # B option
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position += H * W
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# else:
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# gif_export(GifMaker, finish=True)
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def draw_combo(n):
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colorMode(RGB)
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siz = space/2
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for i, sl in enumerate(line_combos[n]):
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colorMode(HSB)
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stroke(i * 64, 128, 128)
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(x0, y0), (x1, y1) = sl[0], sl[1]
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noFill()
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var_bar(x0 * siz, y0 * siz, x1 * siz, y1 * siz, siz / 8, siz / 4)
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def keyPressed():
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global W, H
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if key == "s":
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saveFrame("####.png")
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def settings():
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from os import path
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global SKETCH_NAME
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SKETCH_NAME = path.basename(sketchPath())
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OUTPUT = ".png"
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println(
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"""
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[{0}](https://github.com/villares/sketch-a-day/tree/master/{2}/{0}) [[Py.Processing](https://villares.github.io/como-instalar-o-processing-modo-python/index-EN)]
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""".format(SKETCH_NAME, OUTPUT, year())
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)
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def var_bar(p1x, p1y, p2x, p2y, r1, r2=None):
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"""
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Tangent/tangent shape on 2 circles of arbitrary radius
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"""
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if r2 is None:
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r2 = r1
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#line(p1x, p1y, p2x, p2y)
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d = dist(p1x, p1y, p2x, p2y)
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ri = r1 - r2
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if d > abs(ri):
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rid = (r1 - r2) / d
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if rid > 1:
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rid = 1
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if rid < -1:
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rid = -1
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beta = asin(rid) + HALF_PI
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with pushMatrix():
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translate(p1x, p1y)
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angle = atan2(p1x - p2x, p2y - p1y)
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rotate(angle + HALF_PI)
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x1 = cos(beta) * r1
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y1 = sin(beta) * r1
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x2 = cos(beta) * r2
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y2 = sin(beta) * r2
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#print((d, beta, ri, x1, y1, x2, y2))
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with pushStyle():
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noStroke()
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beginShape()
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vertex(-x1, -y1)
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vertex(d - x2, -y2)
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vertex(d, 0)
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vertex(d - x2, +y2)
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vertex(-x1, +y1)
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vertex(0, 0)
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endShape(CLOSE)
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line(-x1, -y1, d - x2, -y2)
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line(-x1, +y1, d - x2, +y2)
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arc(0, 0, r1 * 2, r1 * 2,
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-beta - PI, beta - PI)
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arc(d, 0, r2 * 2, r2 * 2,
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beta - PI, PI - beta)
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else:
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ellipse(p1x, p1y, r1 * 2, r1 * 2)
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ellipse(p2x, p2y, r2 * 2, r2 * 2)
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