growing

class janim.anims.growing.GrowFromPoint(item: Points, point: ndarray, *, hide_src: bool = True, **kwargs)

基类：Transform

从指定的位置放大显现

GrowFromPointExample

from janim.imports import *

class GrowFromPointExample(Timeline):
    def construct(self):
        group = Group(
            Square(fill_alpha=0.5),
            Circle(fill_alpha=0.5),
            Text('Text', font_size=48),
            color=BLUE
        )
        group.points.arrange(buff=LARGE_BUFF)

        directions=[UP,LEFT,DOWN,RIGHT]

        for direction in directions:
            self.play(
                *[
                    GrowFromPoint(item, item.points.box.center + direction * 3)
                    for item in group
                ]
            )

        self.forward()

class janim.anims.growing.GrowFromCenter(item: Points, **kwargs)

基类：GrowFromPoint

从物件的中心放大显现

GrowFromCenterExample

from janim.imports import *

class GrowFromCenterExample(Timeline):
    def construct(self):
        group = Group(
            Square(fill_alpha=0.5),
            Circle(fill_alpha=0.5),
            Text('Text', font_size=48),
            color=BLUE
        )
        group.points.arrange(buff=LARGE_BUFF)

        self.play(*map(GrowFromCenter, group))

        self.forward()

class janim.anims.growing.GrowFromEdge(item: Points, edge: ndarray, **kwargs)

基类：GrowFromPoint

从物件的指定边角放大显现

GrowFromEdgeExample

from janim.imports import *

class GrowFromEdgeExample(Timeline):
def construct(self):
    group = Group(
        Square(fill_alpha=0.5),
        Circle(fill_alpha=0.5),
        Text('Text', font_size=48),
        color=BLUE
    )
    group.points.arrange(buff=LARGE_BUFF)

    directions=[UP,LEFT,DOWN,RIGHT]

    for direction in directions:
        self.play(
            *[
                GrowFromEdge(item, direction)
                for item in group
            ]
        )

    self.forward()

class janim.anims.growing.SpinInFromNothing(item: Points, *, path_arc=3.141592653589793, **kwargs)

基类：GrowFromCenter

从物件的中心旋转半圈放大显现

SpinInFromNothingExample

from janim.imports import *

class SpinInFromNothingExample(Timeline):
    def construct(self):
        group = Group(
            Square(fill_alpha=0.5),
            Circle(fill_alpha=0.5),
            Text('Text', font_size=48),
            color=BLUE
        )
        group.points.arrange(buff=LARGE_BUFF)

        self.play(
            *map(SpinInFromNothing, group),
            duration=2
        )
        self.forward()

class janim.anims.growing.GrowArrowByBoundFunc(arrow: Arrow, bound_func: Callable[[float], tuple[float, float]], *, hide_at_begin: bool = True, show_at_end: bool = True, **kwargs)

基类：Animation

GrowArrow 和 GrowDoubleArrow 的基类

class janim.anims.growing.GrowArrow(arrow: Arrow, **kwargs)

基类：GrowArrowByBoundFunc

显示箭头的显现过程，从开头到结尾画出，并自动调整箭头标志位置

GrowArrowExample

from janim.imports import *

class GrowArrowExample(Timeline):
    def construct(self):
        group = Group(
            Arrow(ORIGIN, RIGHT * 6),
            Vector(RIGHT * 6, color=YELLOW)
        )
        group.points.arrange(DOWN, buff=2)

        self.play(
            *map(GrowArrow, group),
            duration=2
        )

        self.forward()

class janim.anims.growing.GrowDoubleArrow(arrow: Arrow, start_ratio: float = 0.5, **kwargs)

基类：GrowArrowByBoundFunc

显示箭头的显现过程，默认从中间向两边显现，并自动调整箭头标志位置

• 传入 start_ratio （默认 0.5） 可以调整开始的位置

GrowDoubleArrowExample

from janim.imports import *

class GrowDoubleArrowExample(Timeline):
    def construct(self):
        group = DoubleArrow(ORIGIN, RIGHT * 7) * 3
        group.points.arrange(DOWN, buff=LARGE_BUFF)

        self.play(
            GrowDoubleArrow(group[0], start_ratio=0.2),
            GrowDoubleArrow(group[1]),
            GrowDoubleArrow(group[2], start_ratio=0.8),
            duration=2
        )
        self.forward()