1 files changed, 0 insertions, 120 deletions
diff --git a/FSF-2020/approximations-and-optimizations/The-Second-Derivative-Test/file4_Contour_Diagram.py b/FSF-2020/approximations-and-optimizations/The-Second-Derivative-Test/file4_Contour_Diagram.py
deleted file mode 100644
index d3084e2..0000000
--- a/FSF-2020/approximations-and-optimizations/The-Second-Derivative-Test/file4_Contour_Diagram.py
+++ /dev/null
@@ -1,120 +0,0 @@
-from manimlib.imports import*
-
-#---- contour diagram animation
-class ContourDiagram(ThreeDScene):
-    def construct(self):
-
-        heading = TextMobject("CONTOUR DIAGRAM", color = YELLOW).scale(1) 
-
-        axes = ThreeDAxes()  
-        label_x = TextMobject("$x$").shift([5.5,-0.5,0]) #---- x axis
-        label_y = TextMobject("$y$").shift([-0.5,5.5,0]).rotate(-4.5) #---- y axis    
-
-        #---- surface of a paraboloid 
-        surface = ParametricSurface(
-            lambda u, v: np.array([
-                np.cos(v)*u,
-                np.sin(v)*u,
-                u**2
-            ]),v_min = -2, v_max = 2, u_min = -2, u_max = 2, checkerboard_colors = [GREEN_B,GREEN_C,GREEN_D,GREEN_E]).shift([0,0,0]).scale(0.5)
-        
-        #---- first contour projection
-        contour1 = ParametricSurface(
-            lambda u, v: np.array([
-                np.cos(TAU * v),
-                np.sin(TAU * v),
-                2*(1 - 2.5*u)
-            ])).fade(0.5).scale(0.21).shift([0,0,1.01])
-        
-        #---- first contour line
-        c_1 = Circle(color = BLUE).scale(0.21).shift([0,0,0]).rotate(0.1,DOWN)
-
-        #-------------------------------------------------
-
-        #---- second contour projection
-        contour2 = ParametricSurface(
-            lambda u, v: np.array([
-                np.cos(TAU * v),
-                np.sin(TAU * v),
-                2*(1 - 1.6*u)
-            ])).fade(0.5).scale(0.41).shift([0,0,0.3]).set_color(RED)
-
-        #---- second contour line
-        c_2 = Circle(color = RED).scale(0.41).shift([0,0,0]).rotate(0.1,DOWN)
-
-        #-------------------------------------------------
-        
-        #---- third contour projection
-        contour3 = ParametricSurface(
-            lambda u, v: np.array([
-                np.cos(TAU * v),
-                np.sin(TAU * v),
-                2*(1 - 1.5*u)
-            ])).fade(0.5).scale(0.61).shift([0,0,0.4]).set_color(YELLOW)
-        
-        #---- third contour line
-        c_3 = Circle(color = YELLOW).scale(0.61).shift([0,0,0])
-
-        #-------------------------------------------------
-
-        #---- fourth contour projection
-        contour4 = ParametricSurface(
-            lambda u, v: np.array([
-                np.cos(TAU * v),
-                np.sin(TAU * v),
-                2*(1 - 1.5*u)
-            ])).fade(0.7).scale(0.81).shift([0,0,0.7]).set_color(PINK)
-
-        #---- fourth contour line
-        c_4 = Circle(color = PINK).scale(0.81).shift([0,0,0])
-
-        #-------------------------------------------------
-        
-        #---- fifth contour projection
-        contour5 = ParametricSurface(
-            lambda u, v: np.array([
-                np.cos(TAU * v),
-                np.sin(TAU * v),
-                2*(1 - 1.5*u)
-            ])).fade(0.7).scale(1.01).shift([0,0,1]).set_color(PURPLE)
-        
-        #---- fifth contour line
-        c_5 = Circle(color = PURPLE).scale(1.01).shift([0,0,0])
-
-        c_text= TextMobject("Contour Lines").scale(0.5).shift(2*DOWN)
-        s = Square().scale(1.3)
-        
-        self.set_camera_orientation(phi = 75 * DEGREES, theta = 10 * DEGREES)  
-        self.add_fixed_in_frame_mobjects(heading)
-        self.wait(1)
-        self.play(FadeOut(heading))
-        self.wait(1)
-        self.add(axes)
-        self.add(label_x)
-        self.add(label_y)
-        self.play(Write(surface))
-        self.wait(1)
-        self.add(contour1)
-        self.wait(1)
-        self.play(Write(c_1))
-        self.play(ReplacementTransform(contour1,contour2))
-        self.wait(1)
-        self.play(Write(c_2))
-        self.play(ReplacementTransform(contour2,contour3))
-        self.wait(1)
-        self.play(Write(c_3))
-        self.play(ReplacementTransform(contour3,contour4))
-        self.wait(1)
-        self.play(Write(c_4))
-        self.play(ReplacementTransform(contour4,contour5))
-        self.wait(1)
-        self.play(Write(c_5))
-        self.wait(1)
-        self.play(FadeOut(contour5),FadeOut(axes),FadeOut(label_x),FadeOut(label_y),FadeOut(surface),FadeOut(contour5),FadeOut(contour4),FadeOut(contour3),FadeOut(contour2),FadeOut(contour1))
-        self.wait(1)
-        self.move_camera(phi=0 * DEGREES,theta= 90*DEGREES)
-        self.wait(1)
-        self.add_fixed_in_frame_mobjects(c_text)  
-        self.wait(1)
-        self.play(ShowCreation(s),FadeOut(c_text))      
-        self.wait(1)