Fading

声明

这一页翻译自elteoremadebeethoven的 manim_3feb_docs

部分为鹤翔万里补充

注意

旧版的各种 FadeInFrom 和 FadeOutFrom 等方法已经全部整合在 FadeIn 和 FadeOut 中，以参数的形式给出，使得类的使用更加简洁

FadeOut

class manimlib.animation.fading.FadeOut(mobject: Mobject, shift: np.ndarray = array([0., 0., 0.]), scale: float = 1, **kwargs)

淡出

• scale : 缩放倍数

• shift : 移动向量

FadeOutExample

class FadeOutExample(Scene):
    def construct(self):
        mobjects = VGroup(
            Circle(),
            Circle(fill_opacity=1),
            Text("Text").scale(2)
        )
        mobjects.scale(1.5)
        mobjects.arrange(RIGHT, buff=2)

        self.add(mobjects)
        self.wait(0.3)

        self.play(
            *[FadeOut(mob) for mob in mobjects]
        )

        self.wait()

FadeIn

class manimlib.animation.fading.FadeIn(mobject: Mobject, shift: np.ndarray = array([0., 0., 0.]), scale: float = 1, **kwargs)

淡入

• scale : 缩放倍数

• shift : 移动向量

FadeInExample

class FadeInExample(Scene):
    def construct(self):
        mobjects = VGroup(
            Circle(),
            Circle(fill_opacity=1),
            Text("Text").scale(2)
        )
        mobjects.scale(1.5)
        mobjects.arrange(RIGHT, buff=2)

        self.play(
            *[FadeIn(mob) for mob in mobjects]
        )

        self.wait()

FadeInFromExample

class FadeInFromExample(Scene):
    def construct(self):
        mobjects = VGroup(
            Circle(),
            Circle(fill_opacity=1),
            Text("Text").scale(2)
        )
        mobjects.scale(1.5)
        mobjects.arrange(RIGHT, buff=2)

        directions = [UP, LEFT, DOWN, RIGHT]

        for direction in directions:
            self.play(
                *[FadeIn(mob, shift=direction) for mob in mobjects]
            )

        self.wait()

FadeOutAndShiftExample

class FadeOutAndShiftExample(Scene):
    def construct(self):
        mobjects = VGroup(
            Circle(),
            Circle(fill_opacity=1),
            Text("Text").scale(2)
        )
        mobjects.scale(1.5)
        mobjects.arrange(RIGHT, buff=2)

        directions = [UP, LEFT, DOWN, RIGHT]

        self.add(mobjects)
        self.wait(0.3)

        for direction in directions:
            self.play(
                *[FadeOut(mob, shift=direction) for mob in mobjects]
            )

        self.wait()

FadeInFromLargeExample

class FadeInFromLargeExample(Scene):
    def construct(self):
        mobjects = VGroup(
            Circle(),
            Circle(fill_opacity=1),
            Text("Text").scale(2)
        )
        mobjects.scale(1.5)
        mobjects.arrange(RIGHT, buff=2)

        scale_factors = [0.3, 0.8, 1, 1.3, 1.8]

        for scale_factor in scale_factors:
            t_scale_factor = Text(
                f"scale_factor = {scale_factor}", font="monospace")
            t_scale_factor.to_edge(UP)

            self.add(t_scale_factor)

            self.play(
                *[FadeIn(mob, scale=scale_factor) for mob in mobjects]
            )

            self.remove(t_scale_factor)

        self.wait(0.3)

FadeInFromPoint

class manimlib.animation.fading.FadeInFromPoint(mobject: Mobject, point: np.ndarray, **kwargs)

从传入的一个坐标点淡入

• scale : 缩放倍数

• shift : 移动向量

FadeInFromPointExample

class FadeInFromPointExample(Scene):
    def construct(self):
        mobjects = VGroup(
            Circle(),
            Circle(fill_opacity=1),
            Text("Text").scale(2)
        )
        mobjects.scale(1.5)
        mobjects.arrange(RIGHT, buff=2)

        self.wait()
        self.play(
            *[FadeInFromPoint(mob, UP*3) for mob in mobjects]
        )
        self.wait()

FadeOutToPoint

class manimlib.animation.fading.FadeOutToPoint(mobject: Mobject, point: np.ndarray, **kwargs)

淡出到指定的坐标点

• scale : 缩放倍数

• shift : 移动向量

FadeOutToPointExample

class FadeOutToPointExample(Scene):
    def construct(self):
        mobjects = VGroup(
            Circle(),
            Circle(fill_opacity=1),
            Text("Text").scale(2)
        )
        mobjects.scale(1.5)
        mobjects.arrange(RIGHT, buff=2)

        self.add(mobjects)
        self.wait()
        self.play(
            *[FadeOutToPoint(mob, DOWN*3) for mob in mobjects]
        )
        self.wait()

FadeTransform

class manimlib.animation.fading.FadeTransform(mobject: Mobject, target_mobject: Mobject, **kwargs)

渐变

get_all_mobjects() → list[Mobject]

Ordering must match the ording of arguments to interpolate_submobject

FadeTransformExample

class FadeTransformExample(Scene):
    def construct(self):
        m_a = Rectangle(width=6, height=2, color=BLUE, fill_opacity=1)
        m_b = Text("Rectangle").scale(3)
        self.add(m_a)
        self.wait()
        self.play(FadeTransform(m_a, m_b))
        self.wait()

FadeTransformPieces

class manimlib.animation.fading.FadeTransformPieces(mobject: Mobject, target_mobject: Mobject, **kwargs)

子物件分别渐变为目标

FadeTransformPiecesExample

class FadeTransformPiecesExample(Scene):
    def construct(self):
        m_a = VGroup(*[
            Circle(radius=0.4)
            .move_to((np.random.random(3)-0.5) * 3)
            for i in range(6)
        ])
        m_b = Text("Circle").scale(3)
        self.add(m_a)
        self.wait()
        self.play(FadeTransformPieces(m_a, m_b))
        self.wait()

VFadeIn

class manimlib.animation.fading.VFadeIn(mobject: manimlib.mobject.mobject.Mobject, **kwargs)

淡入

VFadeOut

class manimlib.animation.fading.VFadeOut(mobject: manimlib.mobject.mobject.Mobject, **kwargs)

淡出

VFadeInThenOut

class manimlib.animation.fading.VFadeInThenOut(mobject: manimlib.mobject.mobject.Mobject, **kwargs)

淡入后淡出

Fade和VFade的区别：

FadeIn 的边从细变粗，从暗变亮。 VFadeIn 的边始终是正常粗细，从暗变亮。

FadeOut 和 VFadeOut 无区别