1 files changed, 42 insertions, 0 deletions
diff --git a/FSF-2020/calculus-of-several-variables/div-curl-grad-and-all-that/Curl and Div/DivCurl_file6_macro-micro-curl.py b/FSF-2020/calculus-of-several-variables/div-curl-grad-and-all-that/Curl and Div/DivCurl_file6_macro-micro-curl.py
new file mode 100644
index 0000000..02c75a3
--- /dev/null
+++ b/FSF-2020/calculus-of-several-variables/div-curl-grad-and-all-that/Curl and Div/DivCurl_file6_macro-micro-curl.py
@@ -0,0 +1,42 @@
+from manimlib.imports import *
+import numpy as np
+
+def curl(coordinate):
+	x,y = coordinate[:2]
+	return np.array([
+			-y,
+			x,
+			0
+	])
+
+
+class Subtle(Scene):
+	def construct(self):
+		vf1 = VectorField(curl)
+		pinwheel = SVGMobject("geo").move_to(np.array([2, 0, 0])).scale(0.3).set_stroke(width = 0.3).set_color_by_gradient(["#adf802",  YELLOW_C]).move_to(np.array([2.3, 0, 0]))
+		self.add(pinwheel)
+
+		label1 = TexMobject(r"\textit{Microscopic curl}").shift(3*DOWN).add_background_rectangle()
+		label2 = TexMobject(r"\textit{Macroscopic curl}").shift(3*DOWN)
+
+		ball1 = Dot(checkerboard_colors = [BLUE_E, PURPLE_E], resolution = [2,2], radius = 0.4).move_to(np.array([-1, -1, 0]))
+		ball2 = Sphere(checkerboard_colors = [BLUE_E, TEAL], resolution = [16, 16], radius = 0.3).move_to(np.array([2, 0, 0]))
+		circ = Circle(radius = 2)
+
+
+		self.add(vf1)
+		self.wait()
+		self.play(ShowCreation(pinwheel))
+		self.bring_to_front(pinwheel)
+		self.play(Rotating(pinwheel), ShowCreation(label1))
+		self.wait(2)
+		#self.add(ball1)
+		move_submobjects_along_vector_field(pinwheel, curl)
+		self.play(FadeOut(label1), ShowCreation(label2))
+		self.play(Indicate(label2))
+
+		self.wait(5)
+
+
+
+