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from __future__ import annotations |
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__all__ = ["TrueDot", "DotCloud"] |
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from typing import Any |
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import numpy as np |
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from typing_extensions import Self |
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from manim.constants import ORIGIN, RIGHT, UP |
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from manim.mobject.opengl.opengl_point_cloud_mobject import OpenGLPMobject |
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from manim.typing import Point3DLike |
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from manim.utils.color import YELLOW, ParsableManimColor |
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class DotCloud(OpenGLPMobject): |
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def __init__( |
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self, |
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color: ParsableManimColor = YELLOW, |
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stroke_width: float = 2.0, |
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radius: float = 2.0, |
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density: float = 10, |
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**kwargs: Any, |
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): |
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self.radius = radius |
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self.epsilon = 1.0 / density |
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super().__init__( |
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stroke_width=stroke_width, density=density, color=color, **kwargs |
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) |
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def init_points(self) -> None: |
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self.points = np.array( |
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[ |
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r * (np.cos(theta) * RIGHT + np.sin(theta) * UP) |
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for r in np.arange(self.epsilon, self.radius, self.epsilon) |
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for theta in np.linspace( |
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0, |
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2 * np.pi, |
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num=int(2 * np.pi * (r + self.epsilon) / self.epsilon), |
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) |
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], |
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dtype=np.float32, |
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) |
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def make_3d(self, gloss: float = 0.5, shadow: float = 0.2) -> Self: |
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self.set_gloss(gloss) |
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self.set_shadow(shadow) |
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self.apply_depth_test() |
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return self |
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class TrueDot(DotCloud): |
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def __init__( |
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self, center: Point3DLike = ORIGIN, stroke_width: float = 2.0, **kwargs: Any |
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): |
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self.radius = stroke_width |
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super().__init__(points=[center], stroke_width=stroke_width, **kwargs) |
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