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from manimlib.imports import *
class line_(ThreeDScene):
def construct(self):
axes = ThreeDAxes()
xlabel = TextMobject(r'$x$').shift(4.5*LEFT + 1.7*DOWN)
ylabel = TextMobject(r'$y$').shift(4.5*RIGHT + 1.8*DOWN)
zlabel = TextMobject(r'$z$').shift(3.3*UP+0.5*RIGHT)
self.set_camera_orientation(phi = 75*DEGREES, theta=45*DEGREES)
pointLabel = TextMobject(r'$P$').shift((2.28,2.12,0)).scale(0.7)
point = Dot(color = RED).shift((1.95,1.9,0))
vlabel = TextMobject(r'$\overrightarrow{v}$').shift((0.5,1.3,0)).scale(0.7)
inf_text = TextMobject(r'Infinitely many lines pass \\ through a single point.').scale(0.6).shift(2*UP + 2.5*LEFT)
pointtext = TextMobject(r'Given a direction vector $\overrightarrow{v}$, \\ a line is obtained as:').scale(0.6).shift(2*UP + 2.5*LEFT)
line = Line((0.7,0.7,0), (2,3,0)).shift(0.06*UP+0.6*RIGHT)
v = Vector((0.8,1,0), color = GREEN_E)
#finalLine = Line((-1.56,0,0.5),(-4,0,2.42), color = YELLOW)
finalLine = Line((1,0.8,0),(3,3,0), color = YELLOW).shift(0.05*LEFT)
self.play(FadeIn(axes))
self.add_fixed_in_frame_mobjects(zlabel, ylabel, xlabel)
self.wait(1)
self.add_fixed_in_frame_mobjects(point, pointLabel)
self.wait(1)
self.add_fixed_in_frame_mobjects(inf_text)
self.wait(1)
self.add_fixed_in_frame_mobjects(line)
for i in range(9):
self.play(ApplyMethod(line.rotate, -np.pi/12), run_time = 0.7)
if i == 8:
self.add_fixed_in_frame_mobjects(pointtext)
self.play(ReplacementTransform(inf_text, pointtext))
self.add_fixed_in_frame_mobjects(v, vlabel)
# if i == 13:
# self.add_fixed_in_frame_mobjects(pointtext)
self.add_fixed_in_frame_mobjects(finalLine)
self.play(FadeIn(finalLine))
self.play(Transform(line, finalLine), run_time = 4)
#self.play(FadeOut(line), FadeIn(finalLine))
self.wait(1.5)
self.play(FadeOut(VGroup(*[axes, xlabel, ylabel, zlabel, finalLine, v, vlabel, point, pointLabel, pointtext, line])))
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