1 files changed, 42 insertions, 0 deletions
diff --git a/FSF-2020/calculus-of-several-variables/multivariable-functions-and-paritial-derivatives/multivariable-functions/file3_plot_sphere.py b/FSF-2020/calculus-of-several-variables/multivariable-functions-and-paritial-derivatives/multivariable-functions/file3_plot_sphere.py
new file mode 100644
index 0000000..baf08b1
--- /dev/null
+++ b/FSF-2020/calculus-of-several-variables/multivariable-functions-and-paritial-derivatives/multivariable-functions/file3_plot_sphere.py
@@ -0,0 +1,42 @@
+from manimlib.imports import *
+
+class Sphere(ThreeDScene):
+    def construct(self):
+        axes = ThreeDAxes() # creates a 3D Axis
+
+        sphere = ParametricSurface(
+            lambda u, v: np.array([
+                np.sin(u)*np.cos(v),
+                np.sin(u)*np.sin(v),
+                np.cos(u)
+            ]),u_min=0,u_max=PI,v_min=0,v_max=2*PI,checkerboard_colors=[RED_D, RED_E],
+            resolution=(15, 32)).scale(2)
+
+
+
+        #self.set_camera_orientation(phi=0 * DEGREES,theta=270*DEGREES)
+
+        text3d = TextMobject(r"$f(x,y) \rightarrow Point(x,y,z)$")
+        text3d1 = TextMobject(r"$f(x,y) \rightarrow Point(x,y, 1 - x^2 - y^2)$")
+        self.add_fixed_in_frame_mobjects(text3d)
+        text3d.scale(0.7)
+        text3d1.scale(0.7)
+        text3d.to_corner(UL)
+        text3d1.to_corner(UL)
+        text3d.set_color_by_gradient(RED, ORANGE, YELLOW, GREEN, BLUE, PURPLE)
+        text3d1.set_color_by_gradient(RED, ORANGE, YELLOW, GREEN, BLUE, PURPLE) 
+        self.play(Write(text3d))
+        self.wait(1)
+        
+        self.play(Transform(text3d,text3d1))
+        self.add_fixed_in_frame_mobjects(text3d1)
+        self.play(FadeOut(text3d))
+
+        
+        self.set_camera_orientation(phi=75 * DEGREES)
+        self.begin_ambient_camera_rotation(rate=0.3)
+
+
+        self.add(axes)
+        self.play(Write(sphere))
+        self.wait(5)
+\ No newline at end of file