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from manimlib.imports import *
import math
import pylatex
class intro(GraphScene,Scene):
CONFIG = {
"x_min": -9,
"x_max": 9,
"y_min": -5,
"y_max": 5,
"graph_origin": ORIGIN+DOWN,
"function_color": RED,
"axes_color": GREEN,
"x_axis_label": "$x$",
"y_axis_label": "$\delta (x)$",
"y_axis_height":4,
"x_axis_width":7
}
def setup(self):
GraphScene.setup(self)
Scene.setup(self)
def construct(self):
introText=TextMobject("Dirac","Delta","Function")
introText.set_color_by_tex_to_color_map({"Dirac":BLUE,"Delta":YELLOW})
introText.scale(0.8)
self.play(Write(introText))
self.wait(0.5)
self.play(ApplyMethod(introText.shift,3*UP))
formulaa=TextMobject("$\delta (x)=\infty$","$x=0$")
formulab=TextMobject("$\delta (x)=0$","$x\\neq 0$")
formulaa.set_color_by_tex_to_color_map({"$x=0$":RED})
formulab.set_color_by_tex_to_color_map({"$x\\neq 0$":RED})
formulaa.scale(0.8)
formulab.scale(0.8)
formulab.shift(0.5*DOWN)
self.play(FadeIn(formulaa),FadeIn(formulab))
self.wait(1)
self.play(FadeOut(formulaa),FadeOut(formulab))
x_each_unit = self.x_axis_width / (self.x_max - self.x_min)
y_each_unit = self.y_axis_height / (self.y_max - self.y_min)
self.setup_axes(animate=True)
self.wait(0.8)
functionUpLine=Line(start=self.graph_origin,end=self.graph_origin+UP*y_each_unit*5,color=RED)
functionDownLine=Line(start=self.graph_origin+UP*y_each_unit*5,end=self.graph_origin,color=RED)
functinLeftLine=Line(start=self.graph_origin+LEFT*x_each_unit*9,end=self.graph_origin,color=RED)
functionRightLine=Line(start=self.graph_origin,end=self.graph_origin+RIGHT*x_each_unit*9,color=RED)
functionUpLine.shift(0.02*LEFT)
functionRightLine.shift(0.02*RIGHT)
self.play(ShowCreation(functinLeftLine))
self.play(ShowCreation(functionUpLine))
self.play(ShowCreation(functionDownLine))
self.play(ShowCreation(functionRightLine))
self.wait(1.5)
self.play(FadeOut(self.axes),FadeOut(introText),FadeOut(functinLeftLine),FadeOut(functionRightLine),FadeOut(functionUpLine),FadeOut(functionDownLine))
self.wait(0.5)
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