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supply.py
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supply.py
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from manimlib.imports import *
class Intro(Scene):
def construct(self):
w = SVGMobject("./img/covid20.svg")
self.add(w)
self.wait()
class DemandTitle(Scene):
def construct(self):
part = TextMobject("Part 1")
part.scale(1.5)
part.shift(2 * UP)
title = TextMobject("Demand", color=RED)
title.scale(1.5)
self.play(Write(part))
self.play(Write(title))
self.wait()
class Demand(Scene):
def construct(self):
l = 5.5
pad = 1.5
f1 = TextMobject("Demand:", color=RED)
f1.shift(l * LEFT + (pad + 0.75) * UP)
f1.scale(1.25)
f2 = TextMobject("Fact 2:")
f2.shift(l * LEFT + (pad - 0.75) * DOWN)
f2.scale(1.25)
fact1 = TextMobject(
r"The amount of some good or service \\ \
consumers are willing to buy at \\ \
a specific price", alignment=r"")
fact1.shift(pad * UP + 1 * RIGHT)
fact1.scale(1.25)
self.play(FadeInFromDown(f1))
self.play(Write(fact1))
self.wait()
class Supply(Scene):
def construct(self):
l = 5.5
pad = 1.5
f1 = TextMobject("Supply:", color=BLUE)
f1.shift(l * LEFT + (pad + 0.75) * UP)
f1.scale(1.25)
fact1 = TextMobject(
r"The amount of some good or service \\ \
manufacturers are willing to supply at \\ \
a specific price", alignment=r"")
fact1.shift(pad * UP + 1 * RIGHT)
fact1.scale(1.25)
self.play(FadeInFromDown(f1))
self.play(Write(fact1))
self.wait()
class DemandGraph(Scene):
def construct(self):
axes = Axes(
x_min=0,
x_max=6,
y_min=0,
y_max=5,
axis_config={
"include_tip": False
}
)
line = FunctionGraph(self.func,
x_min=0, x_max=6, color=RED)
grp = VGroup(axes, line)
grp.center()
xlbl = TextMobject("Quantity")
xlbl.shift(3 * DOWN)
ylbl = TextMobject(r"Price (\$)")
ylbl.rotate(PI/2)
ylbl.shift(4 * LEFT + 0.5 * UP)
self.play(Write(axes))
self.play(Write(line))
self.play(FadeInFromDown(xlbl), FadeInFromDown(ylbl))
self.wait()
@staticmethod
def func(x):
return -0.5 * x + 4
class SupplyGraph(Scene):
def construct(self):
axes = Axes(
x_min=0,
x_max=6,
y_min=0,
y_max=5,
axis_config={
"include_tip": False
}
)
line = FunctionGraph(self.func,
x_min=0, x_max=6, color=BLUE)
grp = VGroup(axes, line)
grp.center()
xlbl = TextMobject("Quantity")
xlbl.shift(3 * DOWN)
ylbl = TextMobject(r"Price (\$)")
ylbl.rotate(PI/2)
ylbl.shift(4 * LEFT + 0.5 * UP)
self.play(Write(axes))
self.play(Write(line))
self.play(FadeInFromDown(xlbl), FadeInFromDown(ylbl))
self.wait()
@staticmethod
def func(x):
return 0.425 * x + 0.785
class SupplyAndDemand(Scene):
def construct(self):
axes = Axes(
x_min=0,
x_max=6,
y_min=0,
y_max=5,
axis_config={
"include_tip": False
}
)
supply = FunctionGraph(self.supply,
x_min=0, x_max=6, color=BLUE)
demand = FunctionGraph(self.demand, x_min=0, x_max=6, color=RED)
point = Dot(point=[3.475, 2.262, 0], color=YELLOW)
grp = VGroup(axes, supply, demand, point)
grp.center()
xlbl = TextMobject("Quantity")
xlbl.shift(3 * DOWN)
ylbl = TextMobject(r"Price (\$)")
ylbl.rotate(PI/2)
ylbl.shift(4 * LEFT + 0.5 * UP)
self.play(Write(axes))
self.play(Write(demand))
self.play(Write(supply))
self.play(FadeInFromDown(xlbl), FadeInFromDown(ylbl))
self.wait()
self.play(Write(point))
self.wait()
@staticmethod
def demand(x):
return -0.5 * x + 4
@staticmethod
def supply(x):
return 0.425 * x + 0.785