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2536b7fafb* feat: preserve original Tex colors * added test for preserving tex color * fix: fixed breaking change to tex color inheritance * updated docstring and comment * Update manim/mobject/text/tex_mobject.py Co-authored-by: Aarush Deshpande <110117391+JasonGrace2282@users.noreply.github.com> * [pre-commit.ci] auto fixes from pre-commit.com hooks for more information, see https://pre-commit.ci --------- Co-authored-by: Aarush Deshpande <110117391+JasonGrace2282@users.noreply.github.com> Co-authored-by: pre-commit-ci[bot] <66853113+pre-commit-ci[bot]@users.noreply.github.com>
56 lines
1.8 KiB
Python
56 lines
1.8 KiB
Python
from manim import *
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from manim.utils.testing.frames_comparison import frames_comparison
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__module_test__ = "tex_mobject"
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@frames_comparison
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def test_color_inheritance(scene):
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"""Test that Text and MarkupText correctly inherit colour from
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their parent class.
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"""
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VMobject.set_default(color=RED)
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tex = Tex("test color inheritance")
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mathtex = MathTex("test color inheritance")
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vgr = VGroup(tex, mathtex).arrange()
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VMobject.set_default()
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scene.add(vgr)
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@frames_comparison
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def test_set_opacity_by_tex(scene):
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"""Test that set_opacity_by_tex works correctly."""
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tex = MathTex("f(x) = y", substrings_to_isolate=["f(x)"])
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tex.set_opacity_by_tex("f(x)", 0.2, 0.5)
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scene.add(tex)
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def test_preserve_tex_color():
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"""Test that Tex preserves original tex colors."""
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template = TexTemplate(preamble=r"\usepackage{xcolor}")
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Tex.set_default(tex_template=template)
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txt = Tex(r"\textcolor{red}{Hello} World")
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assert len(txt[0].submobjects) == 10
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assert all(char.fill_color.to_hex() == "#FF0000" for char in txt[0][:5]) # "Hello"
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assert all(
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char.fill_color.to_hex() == WHITE.to_hex() for char in txt[0][-5:]
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) # "World"
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txt = Tex(r"\textcolor{red}{Hello} World", color=BLUE)
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assert len(txt[0].submobjects) == 10
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assert all(char.fill_color.to_hex() == "#FF0000" for char in txt[0][:5]) # "Hello"
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assert all(
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char.fill_color.to_hex() == BLUE.to_hex() for char in txt[0][-5:]
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) # "World"
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Tex.set_default(color=GREEN)
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txt = Tex(r"\textcolor{red}{Hello} World")
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assert len(txt[0].submobjects) == 10
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assert all(char.fill_color.to_hex() == "#FF0000" for char in txt[0][:5]) # "Hello"
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assert all(
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char.fill_color.to_hex() == GREEN.to_hex() for char in txt[0][-5:]
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) # "World"
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Tex.set_default()
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