Update and rename file1_flux_through_sphere.py to file1_flux_through_circle.py

2 files changed, 43 insertions, 50 deletions

diff --git a/FSF-2020/calculus-of-several-variables/triple-and-surface-integrals/flux/file1_flux_through_circle.py b/FSF-2020/calculus-of-several-variables/triple-and-surface-integrals/flux/file1_flux_through_circle.py
new file mode 100644
index 0000000..e418a96
--- /dev/null
+++ b/FSF-2020/calculus-of-several-variables/triple-and-surface-integrals/flux/file1_flux_through_circle.py
@@ -0,0 +1,43 @@
+from manimlib.imports import *
+def pendulum_vector_field_func(point):
+    #theta, omega = point[:2]
+    return np.array([
+        point[0],
+        point[1],
+        point[2],
+    ])
+class F2D(Scene):
+    CONFIG = {
+        # "func": cylinder_flow_vec or_field,
+        "flow_time": 5,
+    }
+    def initialize_vector_field(self):
+        self.vector_field = VectorField(
+            pendulum_vector_field_func,
+        )
+        self.vector_field.sort(get_norm)
+    def construct(self):
+        # plane = NumberPlane(color=RED)
+        # plane.add(plane.get_axis_labels()) 
+        # self.add(plane)  
+        self.initialize_vector_field()
+
+        field = self.vector_field
+        c1=Circle(radius=3,color=BLUE)
+        self.play(ShowCreation(field), run_time=7)
+        self.play(ShowCreation(c1))
+        self.wait(3)
+        lines = StreamLines(
+            pendulum_vector_field_func,
+            virtual_time=3,
+            min_magnitude=0,
+            max_magnitude=2,
+        )
+        self.add(AnimatedStreamLines(
+            lines,
+            line_anim_class=ShowPassingFlash
+        ))
+        self.wait(2)
+        phase_point = VectorizedPoint(1*UP+1*RIGHT)
+        self.add(move_along_vector_field(phase_point, pendulum_vector_field_func))
+        self.wait(2)
diff --git a/FSF-2020/calculus-of-several-variables/triple-and-surface-integrals/flux/file1_flux_through_sphere.py b/FSF-2020/calculus-of-several-variables/triple-and-surface-integrals/flux/file1_flux_through_sphere.py
deleted file mode 100644
index e07715e..0000000
--- a/FSF-2020/calculus-of-several-variables/triple-and-surface-integrals/flux/file1_flux_through_sphere.py
+++ /dev/null
@@ -1,50 +0,0 @@
-from manimlib.imports import *
-class fluxsphere(ThreeDScene):
-    
-
-    def construct(self):
-        s = Sphere(checkerboard_colors=[BLUE_D,BLUE_D])
-        s.scale(2.3)
-
-        n = VGroup(
-            *[self.n(*self.func(u, v))
-              for u in np.arange(0, PI, 0.4)
-              for v in np.arange(0, TAU, 0.8)]
-        )
-
-        
-
-        self.move_camera(0.8 * PI / 2, -0.45 * PI)
-        self.play(Write(s))
-        # self.play(Write(f))
-        self.play(ShowCreation(n), run_time=4)
-        # self.add(n)
-        self.begin_ambient_camera_rotation(rate=0.1)
-        self.wait(5)
-
-
-    def func(self, u, v):
-        return [
-            np.cos(v) * np.sin(u),
-            np.sin(v) * np.sin(u),
-            np.cos(u)
-        ]
-
-    def vect(self, x, y, z):
-        return np.array([
-            x, y, z
-        ])
-
-    def n(self, x, y, z):
-        vect = np.array([
-            x,
-            y,
-            z
-        ])
-
-        mag = math.sqrt(vect[0] ** 2 + vect[1] ** 2 + vect[2] ** 2)
-        v = Vector(
-            (1.5/mag) * vect,
-            color=RED_B,
-            stroke_width=4).shift(2*x * RIGHT + 2*y * UP + 2*z * OUT)
-        return v