__main__.py

"""2026-03-06
Divisões 03
Inspirado em sketch de Alexandre Villares
ericof.com|https://abav.lugaralgum.com/sketch-a-day/#sketch_2026_02_16
png
Sketch,py5,CreativeCoding
"""

from collections import deque
from dataclasses import dataclass
from dataclasses import field
from shapely import Polygon
from sketches.utils.draw import canvas
from sketches.utils.draw.cores.paletas import gera_paleta
from sketches.utils.helpers import sketches as helpers

import numpy as np
import py5


sketch = helpers.info_for_sketch(__file__, __doc__)

cor_fundo = py5.color(0)
paleta: deque[int] = gera_paleta("south-africa", como_deque=True)

divisoes: int = 4


@dataclass
class InfoGrupo:
    vs: list = field(default_factory=list)
    shapes: list = field(default_factory=list)
    areas: list = field(default_factory=list)
    max_area: float = 0.0
    shape: py5.Py5Shape | None = None


grupos: dict[int, InfoGrupo] = {}

intensidade: float = 0.0008
fator: float = 1.1
distorcao_va = 1.5


def start(idx: int, largura: int, altura: int):
    vs = [np.array(pt) for pt in ((0, 0), (largura, 0), (largura, altura), (0, altura))]
    shapes = []
    shapes.append((0, 1, 2, 3))
    areas = [shape_area((0, 1, 2, 3), vs)]
    grupos[idx] = InfoGrupo(
        shape=None, vs=vs, shapes=shapes, areas=areas, max_area=max(areas)
    )


def split_shapes(idx: int):
    info = grupos.get(idx)
    if info and info.shape:
        # Não é necessário dividir novamente se já temos um grupo
        # para essa quantidade de divisões
        return
    idx_anterior = idx - 1 if idx > 1 else 1
    anterior = grupos[idx_anterior]
    shapes = anterior.shapes
    vs = list(anterior.vs)
    div = 2
    new_shapes = []
    while shapes:
        shp = shapes.pop()
        if len(shp) == 4:
            a, b, c, d = shp
            ac = py5.dist(*vs[a], *vs[c])
            bd = py5.dist(*vs[b], *vs[d])
            if ac < bd:
                new_shapes.append((a, b, c))
                new_shapes.append((a, c, d))
            else:
                new_shapes.append((a, b, d))
                new_shapes.append((b, c, d))
            continue
        a, b, c = shp
        ab = py5.dist(*vs[a], *vs[b])
        bc = py5.dist(*vs[b], *vs[c])
        if ab != bc:
            abi = len(vs)
            vs.append((vs[a] + vs[b]) / div)
            bci = len(vs)
            vs.append((vs[b] + vs[c]) / div)
            aci = len(vs)
            vs.append((vs[a] + vs[c]) / div)
            new_shapes.append((a, abi, aci))
            new_shapes.append((abi, b, bci, aci))
            new_shapes.append((bci, c, aci))
        else:
            i = len(vs)
            if ab > bc:
                vs.append((vs[a] + vs[b]) / div)
                new_shapes.append((a, i, c))
                new_shapes.append((i, b, c))
            if bc > ab:
                vs.append((vs[b] + vs[c]) / div)
                new_shapes.append((b, i, a))
                new_shapes.append((i, c, a))
            else:
                vs.append((vs[a] + vs[c]) / div)
                new_shapes.append((a, i, b))
                new_shapes.append((i, c, b))
    areas = [shape_area(shp, vs) for shp in new_shapes]
    info = InfoGrupo(
        shape=None, vs=vs, shapes=new_shapes, areas=areas, max_area=max(areas)
    )
    grupos[idx] = info
    group_shape(idx)


def distort(idx: int, intensity=intensidade, f=fator):
    info = grupos[idx]
    vs = info.vs
    meio = helpers.DIMENSOES.internal[0] / 2, helpers.DIMENSOES.internal[1] / 2
    va = np.array(vs)
    va -= np.array((meio[0], meio[1]))
    distances = np.linalg.norm(va, axis=1)
    scaling_factors = 1 + (intensity * (distances**f))
    va = distorcao_va * va / scaling_factors[:, np.newaxis]
    va += np.array(meio)
    info.vs = va
    _group_shape(info)


def _group_shape(info: InfoGrupo):
    grupo = py5.create_shape(py5.GROUP)
    shapes = info.shapes
    areas = info.areas
    vs = info.vs

    for shp, _ in zip(shapes, areas, strict=False):
        poly = py5.create_shape()
        pts = np.array(vs)[np.array(shp)]
        with poly.begin_closed_shape():
            poly.vertices(pts)
        cor = paleta[0]
        paleta.rotate()
        poly.set_fill(cor)
        poly.set_stroke_weight(4)
        grupo.add_child(poly)
    info.shape = grupo


def group_shape(idx: int):
    info = grupos[idx]
    if info.shape:
        # Já temos um shape para esse grupo, não precisamos recriar
        print(f"Shape para {idx} divisões já existe. Pulando criação.")
        return
    _group_shape(info)


def shape_area(shp, vs):
    return Polygon(np.array(vs)[np.array(shp)]).area


def setup():
    py5.size(*helpers.DIMENSOES.external, py5.P3D)
    for idx in range(1, divisoes + 1):
        start(idx, *helpers.DIMENSOES.internal)
        split_shapes(idx=idx)


def draw():
    py5.background(cor_fundo)
    info = grupos[divisoes]
    grupo = info.shape
    if grupo:
        with py5.push():
            py5.shape_mode(py5.CENTER)
            py5.translate(*helpers.DIMENSOES.centro)
            py5.shape(grupo)

    fps = py5.get_frame_rate()
    py5.window_title(f"Divisões: {divisoes} - Frame Rate: {fps:.2f}")
    # Credits and go
    canvas.sketch_frame(
        sketch,
        cor_fundo,
        "large_transparent_white",
        "transparent_white",
        version=2,
    )


def key_pressed():
    global divisoes
    key = py5.key
    if key == " ":
        save_and_close()
    elif key == "r":
        start(*helpers.DIMENSOES.internal)
    elif key == "a":
        divisoes -= 1 if divisoes > 1 else 0
        split_shapes(divisoes)
    elif key == "d":
        divisoes += 1
        split_shapes(divisoes)
    elif key == "w":
        distort(divisoes)


def save_and_close():
    py5.no_loop()
    canvas.save_sketch_image(sketch)
    py5.exit_sketch()


if __name__ == "__main__":
    py5.run_sketch()