1 files changed, 28 insertions, 0 deletions
diff --git a/FSF-2020/calculus-of-several-variables/geometry-of-planes-and-curves/tnb-frame-and-serret-frenet-formulae/file5_fs2.py b/FSF-2020/calculus-of-several-variables/geometry-of-planes-and-curves/tnb-frame-and-serret-frenet-formulae/file5_fs2.py
new file mode 100644
index 0000000..0261fed
--- /dev/null
+++ b/FSF-2020/calculus-of-several-variables/geometry-of-planes-and-curves/tnb-frame-and-serret-frenet-formulae/file5_fs2.py
@@ -0,0 +1,28 @@
+from manimlib.imports import *
+
+class fs1(ThreeDScene):
+    def construct(self):
+
+
+        self.set_camera_orientation(phi = 75*DEGREES, theta=45*DEGREES)
+        dot1 = Dot(np.array([np.cos(-np.pi/3), np.sin(-np.pi/3), -0.4*np.pi/3]) + np.array([0,0.2,0]), radius = 0.16, color=RED)
+        tgt1 = Arrow((0,0,0), (-2,-0.55,0), color = YELLOW).shift(dot1.get_center() + np.array([0.18,0.04,0]))
+        nm1 = Arrow((0,0,0), (0.4,-2,0), color = BLUE).shift(dot1.get_center() + np.array([0,0.26,0])).shift(np.array([0.8,4.76,0])).rotate(-15*DEGREES).scale(0.8)
+        bnm1 = Arrow((0,0,0), (0,2,0), color=GREEN_E).shift(2.1*RIGHT+2*DOWN)
+
+        bnms = Line((0,0,0), (0,0,1.6), color = GREEN_E).shift(np.array([3.1,5.2,0])).scale(0.6)
+        bnmsa = ArrowTip(color = GREEN_E).next_to(bnms, np.array([0,0,1]), buff = 0).rotate(45*DEGREES)
+        bns = VGroup(*[bnms, bnmsa])
+
+        plane1 = Square(color = DARK_BROWN, fill_color = WHITE, fill_opacity=0.3).shift(dot1.get_center() + np.array([-0.4, -0.6, 0])).rotate(13*DEGREES).scale(1.2)
+        point1 = VGroup(*[dot1, tgt1, plane1]).scale(0.8).shift(np.array([1,4.86,0])).rotate(-15*DEGREES)
+        t = TextMobject(r'$T$', color = YELLOW).move_to(ORIGIN).shift(3.2*RIGHT + DOWN)
+        n = TextMobject(r'$N$', color = BLUE).shift(DOWN + RIGHT)
+        b = TextMobject(r'$B$', color = GREEN_E).next_to(bnm1, UP, buff = 0.1)
+        text = VGroup(*[t, n, b])
+        self.add_fixed_in_frame_mobjects(bnm1, text)
+        self.play(FadeIn(point1), FadeIn(text), FadeIn(bnm1))
+        self.wait()
+        self.play(TransformFromCopy(bnms, nm1, run_time = 3))
+        self.wait(2)
+        self.play(FadeOut(VGroup(*[bnms, text, point1, nm1, bnm1])))