"""2025-07-25
Circularis strepitus I
Criação de círculos com pontos baseados em ruído.
ericof.com|Inspirado em https://ericof.com/en/sketches/2023-05-25
png
Sketch,py5,CreativeCoding
"""
from sketches.utils.draw import canvas
from sketches.utils.helpers import sketches as helpers
import numpy as np
import opensimplex
import py5
sketch = helpers.info_for_sketch(__file__, __doc__)
def calcula_circulo_com_ruido(
diametro: float, z: int
) -> list[tuple[int, int, int, float]]:
"""Calcula um círculo com pontos baseados em ruído."""
raio = diametro / 2
n = int(raio)
pontos = []
for ponto in range(0, n + 1):
x = np.cos(2 * py5.PI / n * ponto) * raio
y = np.sin(2 * py5.PI / n * ponto) * raio
noise = opensimplex.noise2(x=x, y=y)
pontos.append((int(x), int(y), int(z), noise))
return pontos
def popula_pontos():
pontos: list[list[tuple[int, int, int, float]]] = []
step = 20
diametro = 5
z = 100
while diametro < 720:
pontos.append(calcula_circulo_com_ruido(diametro=diametro, z=z))
if diametro % 180 == 0:
step += 20
diametro += step
z -= 10
return pontos
def desenha_circulo(circulo: list[tuple[int, int, int, float]], idx: int, hb: int = 80):
with py5.begin_shape():
x0 = None
y0 = None
for x, y, z, noise in circulo:
h = hb - (idx * 3)
s = 100
b = 100 * abs(noise)
cor = py5.color(h, s, b)
py5.fill(cor)
cor = py5.color(h, s, b * 0.90)
py5.stroke(cor)
py5.vertex(x, y, z)
if x0 and y0:
py5.quadratic_vertex(x0, y0, z, x, y, z)
x_noise = x + (noise * x / 20)
y_noise = y + (noise * y / 20)
py5.quadratic_vertex(x, y, z, x_noise, y_noise, z)
x_noise_1 = x_noise + (noise * x / 8)
y_noise_1 = y_noise + (noise * y / 8)
py5.quadratic_vertex(x_noise, y_noise, z, x_noise_1, y_noise_1, z)
x0 = x
y0 = y
PONTOS = popula_pontos()
def setup():
py5.size(*helpers.DIMENSOES.external, py5.P3D)
cor_fundo = py5.color(0)
py5.background(cor_fundo)
py5.color_mode(py5.HSB, 360, 100, 100)
py5.frame_rate(5)
def draw():
cor_fundo = py5.color(0)
py5.background(cor_fundo)
centro = (py5.width / 2, py5.height / 2)
with py5.push():
py5.translate(*centro, 250)
for idx, circulo in enumerate(PONTOS[::-1]):
angulo = float(py5.radians(py5.random_int(0, 360)))
py5.rotate(angulo)
hb = 120
desenha_circulo(circulo, idx, hb)
# Credits and go
canvas.sketch_frame(
sketch, cor_fundo, "large_transparent_white", "transparent_white"
)
def key_pressed():
key = py5.key
if key == " ":
save_and_close()
def save_and_close():
py5.no_loop()
canvas.save_sketch_image(sketch)
py5.exit_sketch()
if __name__ == "__main__":
py5.run_sketch()