Created a method remove_all_except() in scene.py and interactive_scene.py, and made default colors easily configurable. (#2346)

abdallahsoliman00 · web-flow · commit fd2a6a69e56f · 2025-06-10T08:15:55.000-07:00
* created a method remove_all_except() in scene.py and interactive_scene.py

* Made it such that default mobject colors can be set through the yaml config file.

* * Default color initialisation wasn't working.
Changed conditional expression to `or` instead.

* Added default values to yaml file.

* added set_background_color() function to Scene class

* Changed default font back to Consolas
diff --git a/.gitignore b/.gitignore
@@ -151,3 +151,4 @@ dmypy.json
 # For manim
 /videos
 /custom_config.yml
+test.py
diff --git a/manimlib/constants.py b/manimlib/constants.py
@@ -148,3 +148,12 @@
 GREY: ManimColor = GREY_C
 
 COLORMAP_3B1B: List[ManimColor] = [BLUE_E, GREEN, YELLOW, RED]
+
+# Default mobject colors should be configurable just like background color
+# DEFAULT_MOBJECT_COLOR is mainly for text, tex, line, etc... mobjects. Default is WHITE
+# DEFAULT_LIGHT_COLOR is mainly for things like axes, arrows, annulus and other lightly colored mobjects. Default is GREY_B
+DEFAULT_MOBJECT_COLOR: ManimColor = manim_config.mobject.default_mobject_color or WHITE
+DEFAULT_LIGHT_COLOR: ManimColor = manim_config.mobject.default_light_color or GREY_B
+
+DEFAULT_VMOBJECT_STROKE_COLOR : ManimColor = manim_config.vmobject.default_stroke_color or GREY_A
+DEFAULT_VMOBJECT_FILL_COLOR : ManimColor = manim_config.vmobject.default_fill_color or GREY_C
diff --git a/manimlib/default_config.yml b/manimlib/default_config.yml
@@ -71,10 +71,16 @@ scene:
   default_wait_time: 1.0
 vmobject:
   default_stroke_width: 4.0
+  default_stroke_color: "#DDDDDD"     # Default is GREY_A
+  default_fill_color: "#888888"       # Default is GREY_C
+mobject:
+  default_mobject_color: "#FFFFFF"    # Default is WHITE
+  default_light_color: "#BBBBBB"      # Default is GREY_B
 tex:
   # See tex_templates.yml
   template: "default"
 text:
+  # font: "Cambria Math"
   font: "Consolas"
   alignment: "LEFT"
 embed:
diff --git a/manimlib/mobject/changing.py b/manimlib/mobject/changing.py
@@ -2,7 +2,7 @@
 
 import numpy as np
 
-from manimlib.constants import BLUE_B, BLUE_D, BLUE_E, GREY_BROWN, WHITE
+from manimlib.constants import BLUE_B, BLUE_D, BLUE_E, GREY_BROWN, DEFAULT_MOBJECT_COLOR
 from manimlib.mobject.mobject import Mobject
 from manimlib.mobject.types.vectorized_mobject import VGroup
 from manimlib.mobject.types.vectorized_mobject import VMobject
@@ -102,7 +102,7 @@ def __init__(
         time_traced: float = np.inf,
         time_per_anchor: float = 1.0 / 15,
         stroke_width: float | Iterable[float] = 2.0,
-        stroke_color: ManimColor = WHITE,
+        stroke_color: ManimColor = DEFAULT_MOBJECT_COLOR,
         **kwargs
     ):
         super().__init__(**kwargs)
@@ -147,7 +147,7 @@ def __init__(
         time_traced: float = 1.0,
         stroke_width: float | Iterable[float] = (0, 3),
         stroke_opacity: float | Iterable[float] = (0, 1),
-        stroke_color: ManimColor = WHITE,
+        stroke_color: ManimColor = DEFAULT_MOBJECT_COLOR,
         **kwargs
     ):
         if isinstance(mobject_or_func, Mobject):
diff --git a/manimlib/mobject/coordinate_systems.py b/manimlib/mobject/coordinate_systems.py
@@ -6,7 +6,7 @@
 import numpy as np
 import itertools as it
 
-from manimlib.constants import BLACK, BLUE, BLUE_D, BLUE_E, GREEN, GREY_A, WHITE, RED
+from manimlib.constants import BLACK, BLUE, BLUE_D, BLUE_E, GREEN, GREY_A, RED, DEFAULT_MOBJECT_COLOR
 from manimlib.constants import DEG, PI
 from manimlib.constants import DL, UL, DOWN, DR, LEFT, ORIGIN, OUT, RIGHT, UP
 from manimlib.constants import FRAME_X_RADIUS, FRAME_Y_RADIUS
@@ -617,7 +617,7 @@ def get_parametric_surface(
 
 class NumberPlane(Axes):
     default_axis_config: dict = dict(
-        stroke_color=WHITE,
+        stroke_color=DEFAULT_MOBJECT_COLOR,
         stroke_width=2,
         include_ticks=False,
         include_tip=False,
diff --git a/manimlib/mobject/geometry.py b/manimlib/mobject/geometry.py
@@ -5,7 +5,7 @@
 import numpy as np
 
 from manimlib.constants import DL, DOWN, DR, LEFT, ORIGIN, OUT, RIGHT, UL, UP, UR
-from manimlib.constants import GREY_A, RED, WHITE, BLACK
+from manimlib.constants import RED, BLACK, DEFAULT_MOBJECT_COLOR, DEFAULT_LIGHT_COLOR
 from manimlib.constants import MED_SMALL_BUFF, SMALL_BUFF
 from manimlib.constants import DEG, PI, TAU
 from manimlib.mobject.mobject import Mobject
@@ -330,7 +330,7 @@ def __init__(
         stroke_color: ManimColor = BLACK,
         stroke_width: float = 0.0,
         fill_opacity: float = 1.0,
-        fill_color: ManimColor = WHITE,
+        fill_color: ManimColor = DEFAULT_MOBJECT_COLOR,
         **kwargs
     ):
         super().__init__(
@@ -374,7 +374,7 @@ def __init__(
         inner_radius: float = 1.0,
         outer_radius: float = 2.0,
         arc_center: Vect3 = ORIGIN,
-        fill_color: ManimColor = GREY_A,
+        fill_color: ManimColor = DEFAULT_LIGHT_COLOR,
         fill_opacity: float = 1.0,
         stroke_width: float = 0.0,
         **kwargs,
@@ -424,7 +424,7 @@ def __init__(
         outer_radius: float = 2.0,
         fill_opacity: float = 1.0,
         stroke_width: float = 0.0,
-        fill_color: ManimColor = GREY_A,
+        fill_color: ManimColor = DEFAULT_LIGHT_COLOR,
         center: Vect3 = ORIGIN,
         **kwargs,
     ):
@@ -644,7 +644,7 @@ def __init__(
         self,
         start: Vect3 | Mobject,
         end: Vect3 | Mobject,
-        stroke_color: ManimColor = GREY_A,
+        stroke_color: ManimColor = DEFAULT_LIGHT_COLOR,
         stroke_width: float = 5,
         buff: float = 0.25,
         tip_width_ratio: float = 5,
@@ -744,7 +744,7 @@ def __init__(
         end: Vect3 | Mobject = LEFT,
         buff: float = MED_SMALL_BUFF,
         path_arc: float = 0,
-        fill_color: ManimColor = GREY_A,
+        fill_color: ManimColor = DEFAULT_LIGHT_COLOR,
         fill_opacity: float = 1.0,
         stroke_width: float = 0.0,
         thickness: float = 3.0,
@@ -1008,7 +1008,7 @@ def __init__(
         width: float = DEFAULT_ARROW_TIP_WIDTH,
         length: float = DEFAULT_ARROW_TIP_LENGTH,
         fill_opacity: float = 1.0,
-        fill_color: ManimColor = WHITE,
+        fill_color: ManimColor = DEFAULT_MOBJECT_COLOR,
         stroke_width: float = 0.0,
         tip_style: int = 0,  # triangle=0, inner_smooth=1, dot=2
         **kwargs
diff --git a/manimlib/mobject/interactive.py b/manimlib/mobject/interactive.py
@@ -6,7 +6,7 @@
 from manimlib.constants import FRAME_HEIGHT, FRAME_WIDTH
 from manimlib.constants import DOWN, LEFT, ORIGIN, RIGHT, UP
 from manimlib.constants import MED_LARGE_BUFF, MED_SMALL_BUFF, SMALL_BUFF
-from manimlib.constants import BLACK, BLUE, GREEN, GREY_A, GREY_C, RED, WHITE
+from manimlib.constants import BLACK, BLUE, GREEN, GREY_A, GREY_C, RED, WHITE, DEFAULT_MOBJECT_COLOR
 from manimlib.mobject.mobject import Group
 from manimlib.mobject.mobject import Mobject
 from manimlib.mobject.geometry import Circle
@@ -387,7 +387,7 @@ def __init__(
         box_kwargs: dict = {
             "width": 2.0,
             "height": 1.0,
-            "fill_color": WHITE,
+            "fill_color": DEFAULT_MOBJECT_COLOR,
             "fill_opacity": 1.0,
         },
         text_kwargs: dict = {
diff --git a/manimlib/mobject/mobject.py b/manimlib/mobject/mobject.py
@@ -18,7 +18,7 @@
 from manimlib.constants import FRAME_X_RADIUS, FRAME_Y_RADIUS
 from manimlib.constants import MED_SMALL_BUFF
 from manimlib.constants import TAU
-from manimlib.constants import WHITE
+from manimlib.constants import DEFAULT_MOBJECT_COLOR
 from manimlib.event_handler import EVENT_DISPATCHER
 from manimlib.event_handler.event_listner import EventListener
 from manimlib.event_handler.event_type import EventType
@@ -78,7 +78,7 @@ class Mobject(object):
 
     def __init__(
         self,
-        color: ManimColor = WHITE,
+        color: ManimColor = DEFAULT_MOBJECT_COLOR,
         opacity: float = 1.0,
         shading: Tuple[float, float, float] = (0.0, 0.0, 0.0),
         # For shaders
diff --git a/manimlib/mobject/number_line.py b/manimlib/mobject/number_line.py
@@ -3,7 +3,7 @@
 import numpy as np
 
 from manimlib.constants import DOWN, LEFT, RIGHT, UP
-from manimlib.constants import GREY_B
+from manimlib.constants import DEFAULT_LIGHT_COLOR
 from manimlib.constants import MED_SMALL_BUFF
 from manimlib.mobject.geometry import Line
 from manimlib.mobject.numbers import DecimalNumber
@@ -24,7 +24,7 @@ class NumberLine(Line):
     def __init__(
         self,
         x_range: RangeSpecifier = (-8, 8, 1),
-        color: ManimColor = GREY_B,
+        color: ManimColor = DEFAULT_LIGHT_COLOR,
         stroke_width: float = 2.0,
         # How big is one one unit of this number line in terms of absolute spacial distance
         unit_size: float = 1.0,
diff --git a/manimlib/mobject/numbers.py b/manimlib/mobject/numbers.py
@@ -4,7 +4,7 @@
 import numpy as np
 
 from manimlib.constants import DOWN, LEFT, RIGHT, UP
-from manimlib.constants import WHITE
+from manimlib.constants import DEFAULT_MOBJECT_COLOR
 from manimlib.mobject.svg.tex_mobject import Tex
 from manimlib.mobject.svg.text_mobject import Text
 from manimlib.mobject.types.vectorized_mobject import VMobject
@@ -35,7 +35,7 @@ class DecimalNumber(VMobject):
     def __init__(
         self,
         number: float | complex = 0,
-        color: ManimColor = WHITE,
+        color: ManimColor = DEFAULT_MOBJECT_COLOR,
         stroke_width: float = 0,
         fill_opacity: float = 1.0,
         fill_border_width: float = 0.5,
diff --git a/manimlib/mobject/shape_matchers.py b/manimlib/mobject/shape_matchers.py
@@ -3,7 +3,7 @@
 from colour import Color
 
 from manimlib.config import manim_config
-from manimlib.constants import BLACK, RED, YELLOW, WHITE
+from manimlib.constants import BLACK, RED, YELLOW, DEFAULT_MOBJECT_COLOR
 from manimlib.constants import DL, DOWN, DR, LEFT, RIGHT, UL, UR
 from manimlib.constants import SMALL_BUFF
 from manimlib.mobject.geometry import Line
@@ -118,7 +118,7 @@ def __init__(
         self,
         mobject: Mobject,
         buff: float = SMALL_BUFF,
-        stroke_color=WHITE,
+        stroke_color=DEFAULT_MOBJECT_COLOR,
         stroke_width: float | Sequence[float] = [0, 3, 3, 0],
         stretch_factor=1.2,
         **kwargs
diff --git a/manimlib/mobject/svg/old_tex_mobject.py b/manimlib/mobject/svg/old_tex_mobject.py
@@ -4,7 +4,7 @@
 import operator as op
 import re
 
-from manimlib.constants import BLACK, WHITE
+from manimlib.constants import BLACK, DEFAULT_MOBJECT_COLOR
 from manimlib.mobject.svg.svg_mobject import SVGMobject
 from manimlib.mobject.types.vectorized_mobject import VGroup
 from manimlib.utils.tex_file_writing import latex_to_svg
@@ -26,10 +26,10 @@ def __init__(
         self,
         tex_string: str,
         height: float | None = None,
-        fill_color: ManimColor = WHITE,
+        fill_color: ManimColor = DEFAULT_MOBJECT_COLOR,
         fill_opacity: float = 1.0,
         stroke_width: float = 0,
-        svg_default: dict = dict(fill_color=WHITE),
+        svg_default: dict = dict(fill_color=DEFAULT_MOBJECT_COLOR),
         path_string_config: dict = dict(),
         font_size: int = 48,
         alignment: str = R"\centering",
diff --git a/manimlib/mobject/svg/special_tex.py b/manimlib/mobject/svg/special_tex.py
@@ -1,6 +1,6 @@
 from __future__ import annotations
 
-from manimlib.constants import MED_SMALL_BUFF, WHITE, GREY_C
+from manimlib.constants import MED_SMALL_BUFF, DEFAULT_MOBJECT_COLOR, GREY_C
 from manimlib.constants import DOWN, LEFT, RIGHT, UP
 from manimlib.constants import FRAME_WIDTH
 from manimlib.constants import MED_LARGE_BUFF, SMALL_BUFF
@@ -46,7 +46,7 @@ def fade_all_but(self, index: int, opacity: float = 0.25, scale_factor=0.7) -> N
 
 class TexTextFromPresetString(TexText):
     tex: str = ""
-    default_color: ManimColor = WHITE
+    default_color: ManimColor = DEFAULT_MOBJECT_COLOR
 
     def __init__(self, **kwargs):
         super().__init__(
diff --git a/manimlib/mobject/svg/string_mobject.py b/manimlib/mobject/svg/string_mobject.py
@@ -6,7 +6,7 @@
 from scipy.optimize import linear_sum_assignment
 from scipy.spatial.distance import cdist
 
-from manimlib.constants import WHITE
+from manimlib.constants import DEFAULT_MOBJECT_COLOR
 from manimlib.logger import log
 from manimlib.mobject.svg.svg_mobject import SVGMobject
 from manimlib.mobject.types.vectorized_mobject import VMobject
@@ -46,11 +46,11 @@ class StringMobject(SVGMobject, ABC):
     def __init__(
         self,
         string: str,
-        fill_color: ManimColor = WHITE,
+        fill_color: ManimColor = DEFAULT_MOBJECT_COLOR,
         fill_border_width: float = 0.5,
-        stroke_color: ManimColor = WHITE,
+        stroke_color: ManimColor = DEFAULT_MOBJECT_COLOR,
         stroke_width: float = 0,
-        base_color: ManimColor = WHITE,
+        base_color: ManimColor = DEFAULT_MOBJECT_COLOR,
         isolate: Selector = (),
         protect: Selector = (),
         # When set to true, only the labelled svg is
@@ -60,7 +60,7 @@ def __init__(
         **kwargs
     ):
         self.string = string
-        self.base_color = base_color or WHITE
+        self.base_color = base_color or DEFAULT_MOBJECT_COLOR
         self.isolate = isolate
         self.protect = protect
         self.use_labelled_svg = use_labelled_svg
diff --git a/manimlib/mobject/types/vectorized_mobject.py b/manimlib/mobject/types/vectorized_mobject.py
@@ -5,6 +5,7 @@
 import numpy as np
 
 from manimlib.constants import GREY_A, GREY_C, GREY_E
+from manimlib.constants import DEFAULT_VMOBJECT_FILL_COLOR, DEFAULT_VMOBJECT_STROKE_COLOR
 from manimlib.constants import BLACK
 from manimlib.constants import DEFAULT_STROKE_WIDTH
 from manimlib.constants import DEG
@@ -53,9 +54,6 @@
     from manimlib.typing import ManimColor, Vect3, Vect4, Vect3Array, Self
     from moderngl.context import Context
 
-DEFAULT_STROKE_COLOR = GREY_A
-DEFAULT_FILL_COLOR = GREY_C
-
 
 class VMobject(Mobject):
     data_dtype: np.dtype = np.dtype([
@@ -99,9 +97,9 @@ def __init__(
         fill_border_width: float = 0.0,
         **kwargs
     ):
-        self.fill_color = fill_color or color or DEFAULT_FILL_COLOR
+        self.fill_color = fill_color or color or DEFAULT_VMOBJECT_FILL_COLOR
         self.fill_opacity = fill_opacity
-        self.stroke_color = stroke_color or color or DEFAULT_STROKE_COLOR
+        self.stroke_color = stroke_color or color or DEFAULT_VMOBJECT_STROKE_COLOR
         self.stroke_opacity = stroke_opacity
         self.stroke_width = stroke_width
         self.stroke_behind = stroke_behind
diff --git a/manimlib/mobject/vector_field.py b/manimlib/mobject/vector_field.py
@@ -6,7 +6,7 @@
 from scipy.integrate import solve_ivp
 
 from manimlib.constants import FRAME_HEIGHT, FRAME_WIDTH
-from manimlib.constants import WHITE
+from manimlib.constants import DEFAULT_MOBJECT_COLOR
 from manimlib.animation.indication import VShowPassingFlash
 from manimlib.mobject.types.vectorized_mobject import VGroup
 from manimlib.mobject.types.vectorized_mobject import VMobject
@@ -351,7 +351,7 @@ def __init__(
         cutoff_norm: float = 15,
         # Style info
         stroke_width: float = 1.0,
-        stroke_color: ManimColor = WHITE,
+        stroke_color: ManimColor = DEFAULT_MOBJECT_COLOR,
         stroke_opacity: float = 1,
         color_by_magnitude: bool = True,
         magnitude_range: Tuple[float, float] = (0, 2.0),
diff --git a/manimlib/scene/interactive_scene.py b/manimlib/scene/interactive_scene.py
@@ -245,6 +245,10 @@ def remove(self, *mobjects: Mobject):
         super().remove(*mobjects)
         self.regenerate_selection_search_set()
 
+    def remove_all_except(self, *mobjects_to_keep : Mobject):
+        super().remove_all_except(*mobjects_to_keep)
+        self.regenerate_selection_search_set()
+
     # Related to selection
 
     def toggle_selection_mode(self):
diff --git a/manimlib/scene/scene.py b/manimlib/scene/scene.py
@@ -33,6 +33,7 @@
 from manimlib.utils.family_ops import recursive_mobject_remove
 from manimlib.utils.iterables import batch_by_property
 from manimlib.utils.sounds import play_sound
+from manimlib.utils.color import color_to_rgba
 from manimlib.window import Window
 
 from typing import TYPE_CHECKING
@@ -380,6 +381,11 @@ def remove(self, *mobjects_to_remove: Mobject):
         new_mobjects, _ = recursive_mobject_remove(self.mobjects, to_remove)
         self.mobjects = new_mobjects
 
+    @affects_mobject_list
+    def remove_all_except(self, *mobjects_to_keep : Mobject):
+        self.clear()
+        self.add(*mobjects_to_keep)
+
     def bring_to_front(self, *mobjects: Mobject):
         self.add(*mobjects)
         return self
@@ -867,6 +873,11 @@ def focus(self) -> None:
             return
         self.window.focus()
 
+    def set_background_color(self, background_color, background_opacity=1) -> None:
+        self.camera.background_rgba = list(color_to_rgba(
+            background_color, background_opacity
+        ))
+
 
 class SceneState():
     def __init__(self, scene: Scene, ignore: list[Mobject] | None = None):
