From e6bbddb01dc99ffc035182480593a49ceb119c04 Mon Sep 17 00:00:00 2001
From: Patrick Moessler <pub@asaril.de>
Date: Sun, 19 Feb 2023 16:03:54 +0100
Subject: [PATCH] Add rotating polygon effect

---
 effects/rotatingpoly.py | 97 +++++++++++++++++++++++++++++++++++++++++
 1 file changed, 97 insertions(+)
 create mode 100644 effects/rotatingpoly.py

diff --git a/effects/rotatingpoly.py b/effects/rotatingpoly.py
new file mode 100644
index 0000000..28657ab
--- /dev/null
+++ b/effects/rotatingpoly.py
@@ -0,0 +1,97 @@
+from typing import Any, Tuple
+import pygame as pg
+from effects.effect import Effect, Colors, transform_bounce
+import random
+import math
+from typing import Union, Generator
+
+
+def calc_radii(size, f):
+    r_c = size / (5 * f + 2)
+    r_a = size / 2 - r_c
+    return r_c, r_a
+
+
+class RotatingPoly(Effect):
+    def __init__(
+        self,
+        bounds: pg.Rect,
+        color: Union[pg.Color, Generator[pg.Color, None, None]],
+        beat_color: bool = False,
+        size: int = 100,
+        velocity: Tuple[float, float] = (1, 10),
+        rot_speed: float = 5,
+        outer: int = 5,
+        x_factor: Tuple[float, float] = (0.1, 1),
+        y_factor: Tuple[float, float] = (0.1, 1),
+        *groups: pg.sprite.Group
+    ) -> None:
+        # self.min_velocity = velocity[0]
+        # self.max_velocity = velocity[1]
+
+        self.rot_speed = rot_speed
+        self.rotation = 0.0
+        # self.velocity = random.uniform(self.min_velocity, self.max_velocity)
+        self.color = color
+        self.beat_color = beat_color
+        self.o_count = outer
+
+        self.o_f = 1 / math.sin(math.pi / self.o_count)
+
+        self.spot_radius, self.o_radius = calc_radii(size, self.o_f)
+        # self.i_radius = (self.o_radius - self.spot_radius) * 0.5
+
+        image = pg.Surface((size, size))
+        image.fill(Colors.Black)
+        image.set_colorkey(Colors.Black)
+        super().__init__(
+            image,
+            pg.Rect(
+                bounds.centerx - size / 2,
+                bounds.centery - size / 2,
+                size,
+                size,
+            ),
+            *groups
+        )
+        self.bounds = bounds
+        self.bouncer = transform_bounce(
+            bounds=bounds, velocity=velocity, x_factor=x_factor, y_factor=y_factor
+        )
+        next(self.bouncer)
+        self.o_color = (
+            self.color if isinstance(self.color, pg.Color) else next(self.color)
+        )
+        self.update(is_beat=False)
+
+    def update(self, *args: Any, **kwargs: Any) -> None:
+        self.rect.center = self.bouncer.send(self.rect.size)
+
+        self.image.fill(Colors.Black)
+
+        if not self.beat_color or kwargs["is_beat"]:
+            if isinstance(self.color, Generator):
+                self.o_color = next(self.color)
+
+        node_positions = []
+        for phi in range(0, 360, 360 // self.o_count):
+            rads = math.pi * (phi + self.rotation) / 180
+            pos_x = int(self.rect.width // 2 + self.o_radius * math.cos(rads))
+            pos_y = int(self.rect.height // 2 + self.o_radius * math.sin(rads))
+            node_positions.append((pos_x, pos_y))
+
+        pg.draw.polygon(
+            self.image, self.o_color, node_positions, width=int(self.spot_radius*1.5)
+        )
+
+        for pos_x, pos_y in node_positions:
+            pg.draw.circle(
+                self.image,
+                Colors.White,
+                (pos_x, pos_y),
+                self.spot_radius,
+            )
+
+        self.rotation += self.rot_speed
+        # self.ticks += int(self.velocity / 180 * math.pi)
+        # self.velocity = random.uniform(self.min_velocity, self.max_velocity)