1 files changed, 37 insertions, 0 deletions
diff --git a/FSF-2020/calculus-of-several-variables/div-curl-grad-and-all-that/gradient/file1_missile-example.py b/FSF-2020/calculus-of-several-variables/div-curl-grad-and-all-that/gradient/file1_missile-example.py
new file mode 100644
index 0000000..cd754cd
--- /dev/null
+++ b/FSF-2020/calculus-of-several-variables/div-curl-grad-and-all-that/gradient/file1_missile-example.py
@@ -0,0 +1,37 @@
+from manimlib.imports import *
+import numpy as np
+
+
+def function(coordinate):
+	x,y = coordinate[:2]
+	return np.array([
+		np.sin(x-y),
+		np.exp(y),
+		0
+	])
+def func(coordinate):
+	x,y = coordinate[:2]
+	return np.array([
+		-2*x,
+		y,
+		0])
+
+class Missiles(GraphScene):
+	def construct(self):
+
+		field = VectorField(function)
+		#path = ParametricFunction(lambda x: -2*x)
+
+		dot = SVGMobject("miss").move_to(DL).scale(0.09).set_color(WHITE).rotate(PI/4 + PI)
+		path = ArcBetweenPoints(dot.get_center(), UP+0.2*LEFT)
+
+		self.play(FadeIn(field))
+		self.wait()
+		self.play(FadeIn(dot))
+		self.wait()
+		self.play(MoveAlongPath(dot, path))
+		self.play(ApplyMethod(dot.rotate, PI/4), rate = 0.2)
+		self.play(ApplyMethod(dot.move_to, 3.5*UP), rate = 0.3)
+		#self.play(ApplyMethod(dot.move_to, 3.5*UP))
+		#self.add_fixed_in_frame_mobjects(text_field)
+		self.wait()
+\ No newline at end of file