这是一个manim错误还是我做错了什么，以使简单的Square Fill_color失败？
这是我的代码。我希望两个正方形都会填充绿色，但只有Square1是正确的。运行Windows 10和Manim社区v0.15.2。这是一个小虫吗？ Square2的评论显示了如何规避错误。
from manim import *
class MovingTriangle(Scene):
def construct(self):
square1 = Square(side_length=1,color=RED,fill_color=RED, fill_opacity=1)
square1.color = GREEN
square1.fill_color = GREEN
square1.fill_opacity = 1
square1.stroke_color = GREEN
square2 = Square(side_length=1) # if parms for any color added in this constructor then square2 would work (fill green)
square2.color = GREEN
square2.fill_color = GREEN
square2.fill_opacity = 1
square2.stroke_color = GREEN
square2.next_to(square1, RIGHT)
self.add(square1, square2)
self.wait()
Here is my code. I would expect both squares to be filled GREEN but only square1 is correct. Running Windows 10 and manim community v0.15.2. Is this a manim bug?
The comment for square2 shows how to circumvent the bug.
from manim import *
class MovingTriangle(Scene):
def construct(self):
square1 = Square(side_length=1,color=RED,fill_color=RED, fill_opacity=1)
square1.color = GREEN
square1.fill_color = GREEN
square1.fill_opacity = 1
square1.stroke_color = GREEN
square2 = Square(side_length=1) # if parms for any color added in this constructor then square2 would work (fill green)
square2.color = GREEN
square2.fill_color = GREEN
square2.fill_opacity = 1
square2.stroke_color = GREEN
square2.next_to(square1, RIGHT)
self.add(square1, square2)
self.wait()
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评论（2）
我真的不会称其为错误，但我同意这种行为有些意外。仅通过设置
fill_color属性来设置mobject的颜色； there is some additional stuff going on (see for example目前，最好设置构造函数中的颜色，或使用专用
set_color，set_fill，set_stroke，或set_style方法。I wouldn't really call it a bug, but I agree that the behavior is somewhat unexpected. Setting the color of a mobject just by setting the
fill_colorattribute is not supported; there is some additional stuff going on (see for example the implementation ofVMobject.set_fill) before the color of the mobject is actually changed when rendering (most notably, the call toupdate_rgbas_array).For now it is best to set the colors in the constructor, or to use the dedicated
set_color,set_fill,set_stroke, orset_stylemethods.找到了解决方案。您需要明确设置
obacity = 1.0，因为默认情况下，大多数vmobjects都没有填充不透明度。Found a solution. You need to explicitly set
opacity = 1.0since by default most VMobjects have no fill opacity.