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from manimlib.imports import *
class MultivariableFunc(Scene):
def construct(self):
topic = TextMobject("Multivariable Functions")
topic.set_color_by_gradient(RED, ORANGE, YELLOW, GREEN, BLUE, PURPLE)
topic.scale(2)
self.play(Write(topic))
self.wait(1)
self.play(FadeOut(topic))
circle = Circle()
circle.scale(3)
eqn1 = TextMobject(r"f(x,y) = $x^2y$")
eqn1.set_color(YELLOW)
number1 = TextMobject("(2,1)")
number1.move_to(3*UP+ 3*LEFT)
number1.scale(1.2)
number1.set_color(GREEN)
output1 = TextMobject("4")
output1.scale(1.5)
output1.set_color(BLUE)
eqn1_1 = TextMobject(r"f(2,1) = $2^2(1)$")
eqn1_1.set_color(YELLOW)
self.play(ShowCreation(circle),Write(eqn1))
self.wait(1)
self.play(ApplyMethod(number1.move_to, 0.6*LEFT))
self.play(FadeOut(number1))
self.play(Transform(eqn1, eqn1_1))
self.wait(1)
self.play(ApplyMethod(output1.move_to, 3*DOWN+4*RIGHT))
self.wait(1)
self.play(FadeOut(output1))
eqn2 = TextMobject(r"f(x,y,z) = $x^2y+2yz$")
eqn2.set_color(YELLOW)
number2 = TextMobject("(2,1,3)")
number2.move_to(3*UP+ 3*LEFT)
number2.scale(1.2)
number2.set_color(GREEN)
output2 = TextMobject("8")
output2.scale(1.5)
output2.set_color(BLUE)
eqn2_1 = TextMobject(r"f(2,1,3) = $2^2(1) + 2(1)(3)$")
eqn2_1.set_color(YELLOW)
eqn2_2 = TextMobject(r"f(2,1,3) = $2 + 6$")
eqn2_2.set_color(YELLOW)
self.play(FadeOut(eqn1))
self.play(Write(eqn2))
self.wait(1)
self.play(ApplyMethod(number2.move_to, 1.2*LEFT))
self.play(FadeOut(number2))
self.play(Transform(eqn2, eqn2_1))
self.wait(1)
self.play(Transform(eqn2, eqn2_2))
self.wait(1)
self.play(ApplyMethod(output2.move_to, 3*DOWN+4*RIGHT))
self.wait(1)
self.play(FadeOut(output2),FadeOut(eqn2),FadeOut(circle))
self.wait(2)
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