kopia lustrzana https://github.com/villares/sketch-a-day
98 wiersze
2.8 KiB
Python
98 wiersze
2.8 KiB
Python
SKETCH_NAME = "s080"
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"""
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sketch 80 180321 - Alexandre B A Villares
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https://abav.lugaralgum.com/sketch-a-day
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Based on Recursive Tree by Daniel Shiffman.
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"""
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add_library('gifAnimation')
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from gif_exporter import gif_export
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from slider import Slider
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A = Slider(0, HALF_PI, QUARTER_PI)
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B = Slider(0, 10, 0)
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C = Slider(-2, 2, 0)
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D = Slider(2, 10, 10)
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def setup():
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size(600, 600, P2D)
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frameRate(30)
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colorMode(HSB)
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noFill()
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A.position(20, height - 60)
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B.position(20, height - 30)
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C.position(width - 180, height - 60)
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D.position(width - 180, height - 30)
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def draw():
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global b, c, d
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background(200)
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a = A.value() # Angle
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b = B.value() # branch size randomization
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c = C.value() # angle randomization
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d = D.value() # recursion depth
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randomSeed(int(d*10))
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translate(width / 2, height / 2)
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branch(int(d), a, width/20 + (width/75)*b)
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# #uncomment next lines to export GIF
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if not frameCount % 10: gif_export(GifMaker,
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frames=2000,
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filename=SKETCH_NAME)
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def branch(gen, theta, branch_size):
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strokeWeight(2)
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# All recursive functions must have an exit condition!!!!
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if gen > 1:# and branch_size > 1:
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with pushMatrix():
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stroke(255 * (gen % 2))
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h = branch_size * (1 - random(b/3,b) / 15)
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rotate(theta + c * random(1)) # Rotate by theta
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arrow(0, 0, 0, -h, tail_func=ellipse) # Draw the branch
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translate(0, -h) # Move to the end of the branch
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# Ok, now call myself to draw two branches!!
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with pushStyle():
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branch(gen - 1, theta, h)
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with pushMatrix():
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stroke(255 * (gen % 2))
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h = branch_size * (1 - random(b/3, b) / 15)
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rotate(-theta + c * random(1))
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arrow(0, 0, 0, -h, tail_func=ellipse)
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translate(0, -h)
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with pushStyle():
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branch(gen - 1, theta, h)
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def arrow(x1, y1, x2, y2,
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shorter=10,
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head=None,
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tail_func=None,
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tail_size=None):
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"""
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O código para fazer as setas, dois pares (x, y),
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um parâmetro de encurtamento: shorter
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e para o tamanho da cabeça da seta: head
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"""
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rectMode(CENTER)
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L = dist(x1, y1, x2, y2)
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if not head:
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head = max(L / 10, 5)
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with pushMatrix():
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translate(x1, y1)
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angle = atan2(x1 - x2, y2 - y1)
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rotate(angle)
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offset = shorter / 2
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strokeCap(ROUND)
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line(0, L - offset, -head / 3, L - offset - head)
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line(0, L - offset, head / 3, L - offset - head)
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strokeCap(SQUARE)
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line(0, offset, 0, L - offset)
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if tail_func:
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if not tail_size:
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tail_size = head
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tail_func(0, 0, tail_size, tail_size)
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