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c25b89c210* make sure animations from _AnimationBuilder are built before adding to AnimationGroup * add test for _AnimationBuilder in group * black * delegate building of animation to prepare_animation * black * remove unused import * rewrite loop as list comprehension Co-authored-by: friedkeenan <friedkeenan@protonmail.com> Co-authored-by: friedkeenan <friedkeenan@protonmail.com>
87 lines
3.7 KiB
Python
87 lines
3.7 KiB
Python
from manim.animation.animation import Animation
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from manim.animation.composition import AnimationGroup, Succession
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from manim.animation.fading import FadeIn, FadeInFrom, FadeOutAndShift
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from manim.constants import DOWN
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from manim.mobject.geometry import Line, Square, Circle
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def test_succession_timing():
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"""Test timing of animations in a succession."""
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line = Line()
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animation_1s = FadeInFrom(line, direction=DOWN, run_time=1.0)
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animation_4s = FadeOutAndShift(line, direction=DOWN, run_time=4.0)
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succession = Succession(animation_1s, animation_4s)
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assert succession.get_run_time() == 5.0
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succession.begin()
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assert succession.active_index == 0
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# The first animation takes 20% of the total run time.
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succession.interpolate(0.199)
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assert succession.active_index == 0
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succession.interpolate(0.2)
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assert succession.active_index == 1
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succession.interpolate(0.8)
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assert succession.active_index == 1
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# At 100% and more, no animation must be active anymore.
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succession.interpolate(1.0)
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assert succession.active_index == 2
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assert succession.active_animation is None
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succession.interpolate(1.2)
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assert succession.active_index == 2
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assert succession.active_animation is None
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def test_succession_in_succession_timing():
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"""Test timing of nested successions."""
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line = Line()
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animation_1s = FadeInFrom(line, direction=DOWN, run_time=1.0)
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animation_4s = FadeOutAndShift(line, direction=DOWN, run_time=4.0)
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nested_succession = Succession(animation_1s, animation_4s)
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succession = Succession(
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FadeInFrom(line, direction=DOWN, run_time=4.0),
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nested_succession,
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FadeInFrom(line, direction=DOWN, run_time=1.0),
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)
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assert nested_succession.get_run_time() == 5.0
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assert succession.get_run_time() == 10.0
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succession.begin()
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succession.interpolate(0.1)
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assert succession.active_index == 0
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# The nested succession must not be active yet, and as a result hasn't set active_animation yet.
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assert not hasattr(nested_succession, "active_animation")
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succession.interpolate(0.39)
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assert succession.active_index == 0
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assert not hasattr(nested_succession, "active_animation")
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# The nested succession starts at 40% of total run time
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succession.interpolate(0.4)
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assert succession.active_index == 1
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assert nested_succession.active_index == 0
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# The nested succession second animation starts at 50% of total run time.
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succession.interpolate(0.49)
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assert succession.active_index == 1
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assert nested_succession.active_index == 0
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succession.interpolate(0.5)
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assert succession.active_index == 1
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assert nested_succession.active_index == 1
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# The last animation starts at 90% of total run time. The nested succession must be finished at that time.
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succession.interpolate(0.89)
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assert succession.active_index == 1
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assert nested_succession.active_index == 1
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succession.interpolate(0.9)
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assert succession.active_index == 2
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assert nested_succession.active_index == 2
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assert nested_succession.active_animation is None
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# After 100%, nothing must be playing anymore.
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succession.interpolate(1.0)
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assert succession.active_index == 3
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assert succession.active_animation is None
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assert nested_succession.active_index == 2
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assert nested_succession.active_animation is None
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def test_animationbuilder_in_group():
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sqr = Square()
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circ = Circle()
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animation_group = AnimationGroup(sqr.animate.shift(DOWN).scale(2), FadeIn(circ))
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assert all(isinstance(anim, Animation) for anim in animation_group.animations)
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succession = Succession(sqr.animate.shift(DOWN).scale(2), FadeIn(circ))
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assert all(isinstance(anim, Animation) for anim in succession.animations)
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