mirror of
https://github.com/3b1b/manim.git
synced 2025-09-01 00:48:45 +00:00
Trying to make light cones update correctly
This commit is contained in:
Ben Hambrecht
parent
738d6974b7
commit
afc0c0d5ae
1 changed files with 43 additions and 21 deletions
|
|
@ -48,6 +48,7 @@ LIGHT_CONE_NUM_SECTORS = 30
|
|||
NUM_CONES = 50 # in first lighthouse scene
|
||||
NUM_VISIBLE_CONES = 5 # ibidem
|
||||
ARC_TIP_LENGTH = 0.2
|
||||
DIM_OPACITY = 0.2
|
||||
|
||||
|
||||
def show_line_length(line):
|
||||
|
|
@ -95,6 +96,7 @@ class LightScreen(VMobject):
|
|||
|
||||
def update_light_cone(self,lc):
|
||||
lower_angle, upper_angle = self.viewing_angles()
|
||||
#print lower_angle, upper_angle
|
||||
self.light_cone.update_opening(start_angle = lower_angle,
|
||||
stop_angle = upper_angle)
|
||||
return self
|
||||
|
|
@ -133,6 +135,11 @@ class LightScreen(VMobject):
|
|||
self.shadow.add_control_points([outpoint2,outpoint1,self.screen.points[0]])
|
||||
self.shadow.mark_paths_closed = True
|
||||
|
||||
def move_source_to(self,new_point):
|
||||
self.light_source = new_point
|
||||
#self.update_light_cone(self.light_cone)
|
||||
|
||||
|
||||
|
||||
class LightCone(VGroup):
|
||||
CONFIG = {
|
||||
|
|
@ -173,6 +180,7 @@ class LightCone(VGroup):
|
|||
return
|
||||
source = self.submobjects[0].get_arc_center()
|
||||
self.shift(point - source)
|
||||
self.generate_points()
|
||||
|
||||
def update_opening(self, start_angle, stop_angle):
|
||||
self.start_angle = start_angle
|
||||
|
|
@ -754,27 +762,31 @@ class SingleLightHouseScene(PiCreatureScene):
|
|||
light_screen.screen.color = WHITE
|
||||
light_screen.screen.fill_opacity = 1
|
||||
light_screen.update_light_cone(light_cone)
|
||||
self.play(
|
||||
FadeIn(light_screen, run_time = 2),
|
||||
# dim the light that misses the screen
|
||||
ApplyMethod(candle.set_brightness,0.3),
|
||||
ApplyMethod(light_screen.update_shadow,light_screen.shadow),
|
||||
FadeIn(light_cone),
|
||||
)
|
||||
# self.play(
|
||||
# FadeIn(light_screen, run_time = 2),
|
||||
# # dim the light that misses the screen
|
||||
# ApplyMethod(candle.set_brightness,0.3),
|
||||
# ApplyMethod(light_screen.update_shadow,light_screen.shadow),
|
||||
# FadeIn(light_cone),
|
||||
# )
|
||||
|
||||
|
||||
lc_updater = lambda lc: light_screen.update_light_cone(lc)
|
||||
sh_updater = lambda sh: light_screen.update_shadow(sh)
|
||||
|
||||
ca1 = ContinualUpdateFromFunc(light_screen.light_cone,
|
||||
lc_updater)
|
||||
ca15 = ContinualUpdateFromFunc(light_screen,
|
||||
lc_updater)
|
||||
ca2 = ContinualUpdateFromFunc(light_screen.shadow,
|
||||
sh_updater)
|
||||
|
||||
self.add(ca1, ca2)
|
||||
self.add(ca1, ca15, ca2)
|
||||
self.add_foreground_mobject(morty)
|
||||
|
||||
pointing_screen_at_source = ApplyMethod(screen.rotate_in_place,TAU/6)
|
||||
self.play(pointing_screen_at_source)
|
||||
pointing_screen_at_source = ApplyMethod(screen.rotate,TAU/6)
|
||||
#self.play(pointing_screen_at_source)
|
||||
#self.wait()
|
||||
|
||||
arc_angle = light_cone.angle
|
||||
# draw arc arrows to show the opening angle
|
||||
|
|
@ -791,7 +803,7 @@ class SingleLightHouseScene(PiCreatureScene):
|
|||
angle_indicator.next_to(angle_arc,RIGHT)
|
||||
self.add_foreground_mobject(angle_indicator)
|
||||
|
||||
angle_update_func = lambda x: light_cone.angle/TAU*360
|
||||
angle_update_func = lambda x: light_cone.angle/TAU * 360
|
||||
ca3 = ContinualChangingDecimal(angle_indicator,angle_update_func)
|
||||
self.add(ca3)
|
||||
|
||||
|
|
@ -799,8 +811,18 @@ class SingleLightHouseScene(PiCreatureScene):
|
|||
ca4 = AngleUpdater(angle_arc, light_screen.light_cone)
|
||||
self.add(ca4)
|
||||
|
||||
rotating_screen = ApplyMethod(light_screen.screen.rotate_in_place, TAU/6, run_time=3, rate_func = wiggle)
|
||||
self.play(rotating_screen)
|
||||
rotating_screen = ApplyMethod(light_screen.screen.rotate,
|
||||
TAU/8, run_time=1.5)
|
||||
#self.wait(2)
|
||||
rotating_screen_2 = ApplyMethod(light_screen.screen.rotate,
|
||||
-TAU/4, run_time=3, rate_func = there_and_back)
|
||||
#self.wait(2)
|
||||
rotating_screen_3 = ApplyMethod(light_screen.screen.rotate,
|
||||
TAU/8, run_time=1.5)
|
||||
|
||||
#self.play(rotating_screen)
|
||||
#self.play(rotating_screen_2)
|
||||
#self.play(rotating_screen_3)
|
||||
|
||||
#rotating_screen_back = ApplyMethod(light_screen.screen.rotate_in_place, -TAU/6) #, run_time=3, rate_func = wiggle)
|
||||
#self.play(rotating_screen_back)
|
||||
|
|
@ -815,14 +837,14 @@ class SingleLightHouseScene(PiCreatureScene):
|
|||
globe.move_to([2,0,0])
|
||||
sun_position = [-100,0,0]
|
||||
self.play(
|
||||
ApplyMethod(lighthouse.move_to,sun_position),
|
||||
ApplyMethod(candle.move_to,sun_position),
|
||||
ApplyMethod(light_cone.move_source_to,sun_position),
|
||||
FadeOut(angle_arc),
|
||||
FadeOut(angle_indicator),
|
||||
FadeIn(globe),
|
||||
ApplyMethod(light_screen.move_to,[0,0,0]),
|
||||
ApplyMethod(morty.move_to,[1,0,0])
|
||||
#ApplyMethod(lighthouse.move_to,sun_position),
|
||||
#ApplyMethod(candle.move_to,sun_position),
|
||||
ApplyMethod(light_screen.move_source_to,sun_position),
|
||||
#FadeOut(angle_arc),
|
||||
#FadeOut(angle_indicator),
|
||||
#FadeIn(globe),
|
||||
#ApplyMethod(light_screen.move_to,[0,0,0]),
|
||||
#ApplyMethod(morty.move_to,[1,0,0])
|
||||
|
||||
)
|
||||
|
||||
|
|
|
|||
Loading…
Add table
Reference in a new issue