mirror of
https://github.com/3b1b/manim.git
synced 2025-08-21 05:44:04 +00:00
even more tweaking, added ThumbnailScene
This commit is contained in:
Ben Hambrecht
parent
ae943ba795
commit
16cdc01003
1 changed files with 232 additions and 83 deletions
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@ -43,7 +43,7 @@ NUM_CONES = 7 # in first lighthouse scene
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NUM_VISIBLE_CONES = 5 # ibidem
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ARC_TIP_LENGTH = 0.2
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NUM_LEVELS = 150
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NUM_LEVELS = 15
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AMBIENT_FULL = 0.8
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AMBIENT_DIMMED = 0.5
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AMBIENT_SCALE = 2.0
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@ -56,6 +56,26 @@ SPOTLIGHT_RADIUS = 20.0
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LIGHT_COLOR = YELLOW
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DEGREES = TAU/360
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BASELINE_YPOS = -2.5
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OBSERVER_POINT = np.array([0,BASELINE_YPOS,0])
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LAKE0_RADIUS = 1.5
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INDICATOR_RADIUS = 0.6
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TICK_SIZE = 0.5
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LIGHTHOUSE_HEIGHT = 0.5
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LAKE_COLOR = BLUE
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LAKE_OPACITY = 0.15
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LAKE_STROKE_WIDTH = 5.0
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LAKE_STROKE_COLOR = BLUE
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TEX_SCALE = 0.8
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DOT_COLOR = BLUE
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LIGHT_MAX_INT = 1
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LIGHT_SCALE = 2.5
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LIGHT_CUTOFF = 1
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RIGHT_ANGLE_SIZE = 0.3
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inverse_power_law = lambda maxint,scale,cutoff,exponent: \
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(lambda r: maxint * (cutoff/(r/scale+cutoff))**exponent)
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inverse_quadratic = lambda maxint,scale,cutoff: inverse_power_law(maxint,scale,cutoff,2)
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@ -2355,6 +2375,7 @@ class InscribedAngleScene(ThreeDScene):
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self.unzoomable_mobs.shift,v
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)
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self.force_skipping()
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self.zoomable_mobs = VMobject()
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self.unzoomable_mobs = VMobject()
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@ -2391,7 +2412,7 @@ class InscribedAngleScene(ThreeDScene):
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# first lighthouse
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original_op_func = inverse_quadratic(LIGHT_MAX_INT,AMBIENT_SCALE,LIGHT_CUTOFF)
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ls0 = LightSource(opacity_function = original_op_func, num_levels = 150)
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ls0 = LightSource(opacity_function = original_op_func, num_levels = NUM_LEVELS)
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ls0.move_source_to(OBSERVER_POINT + LAKE0_RADIUS * 2 * UP)
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self.zoomable_mobs.add(ls0, ls0.lighthouse, ls0.ambient_light)
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@ -2734,6 +2755,7 @@ class InscribedAngleScene(ThreeDScene):
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self.new_legs_2 = []
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self.new_hypotenuses = []
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self.revert_to_original_skipping_status()
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construction_step(0)
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indicator_wiggle()
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@ -3046,7 +3068,6 @@ class PondScene(ThreeDScene):
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RIGHT_ANGLE_SIZE = 0.3
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self.cumulated_zoom_factor = 1
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@ -3293,7 +3314,7 @@ class PondScene(ThreeDScene):
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return position
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def split_light_source(i, step, show_steps = True, run_time = 1):
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def split_light_source(i, step, show_steps = True, animate = True, run_time = 1):
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ls_new_loc1 = position_for_index(i,step + 1)
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ls_new_loc2 = position_for_index(i + 2**step,step + 1)
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@ -3324,7 +3345,9 @@ class PondScene(ThreeDScene):
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ls2 = ls1.copy()
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self.add(ls2)
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if animate == True:
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self.add(ls2)
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self.additional_light_sources.append(ls2)
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# check if the light sources are on screen
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@ -3334,7 +3357,7 @@ class PondScene(ThreeDScene):
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onscreen_2 = np.any(np.abs(ls_new_loc2) < 10)
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show_animation = (onscreen_old or onscreen_1 or onscreen_2)
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if show_animation:
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if show_animation or animate:
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self.play(
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ApplyMethod(ls1.move_source_to,ls_new_loc1, run_time = run_time),
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ApplyMethod(ls2.move_source_to,ls_new_loc2, run_time = run_time),
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@ -3411,66 +3434,94 @@ class PondScene(ThreeDScene):
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self.additional_light_sources = []
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self.new_legs_1 = []
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self.new_legs_2 = []
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self.new_hypotenuses = []
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self.new_hypotenuses = []
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for i in range(2**n):
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split_light_source(i,
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step = n,
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show_steps = show_steps,
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run_time = run_time
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if simultaneous_splitting == False:
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for i in range(2**n):
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split_light_source(i,
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step = n,
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show_steps = show_steps,
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run_time = run_time
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)
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if n == 1 and i == 0:
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# show again where the right angles are
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A = self.light_sources[0].get_center()
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B = self.additional_light_sources[0].get_center()
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C = self.obs_dot.get_center()
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triangle1 = triangle(
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A, C, B
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)
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right_angle1 = right_angle(
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A, C, B, size = 2 * RIGHT_ANGLE_SIZE
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)
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self.play(
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FadeIn(triangle1),
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FadeIn(right_angle1)
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)
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self.wait()
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self.play(
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FadeOut(triangle1),
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FadeOut(right_angle1)
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)
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self.wait()
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H = self.inner_lake.get_center() + self.lake_radius/2 * RIGHT
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L = self.outer_lake.get_center()
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triangle2 = triangle(
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L, H, C
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)
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right_angle2 = right_angle(
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L, H, C, size = 2 * RIGHT_ANGLE_SIZE
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)
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self.play(
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FadeIn(triangle2),
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FadeIn(right_angle2)
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)
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self.wait()
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self.play(
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FadeOut(triangle2),
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FadeOut(right_angle2)
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)
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self.wait()
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else: # simultaneous splitting
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old_lake = self.outer_lake.copy()
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old_ls = self.light_sources.copy()
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old_ls2 = old_ls.copy()
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for submob in old_ls2.submobjects:
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old_ls.add(submob)
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self.remove(self.outer_lake, self.light_sources)
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self.add(old_lake, old_ls)
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for i in range(2**n):
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split_light_source(i,
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step = n,
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show_steps = show_steps,
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run_time = run_time,
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animate = False
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)
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self.play(
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ReplacementTransform(old_ls, self.light_sources, run_time = run_time),
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ReplacementTransform(old_lake, self.outer_lake, run_time = run_time),
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)
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if n == 1 and i == 0:
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# show again where the right angles are
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A = self.light_sources[0].get_center()
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B = self.additional_light_sources[0].get_center()
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C = self.obs_dot.get_center()
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triangle1 = triangle(
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A, C, B
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)
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right_angle1 = right_angle(
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A, C, B, size = 2 * RIGHT_ANGLE_SIZE
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)
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self.play(
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FadeIn(triangle1),
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FadeIn(right_angle1)
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)
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self.wait()
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self.play(
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FadeOut(triangle1),
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FadeOut(right_angle1)
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)
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self.wait()
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H = self.inner_lake.get_center() + self.lake_radius/2 * RIGHT
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L = self.outer_lake.get_center()
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triangle2 = triangle(
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L, H, C
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)
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right_angle2 = right_angle(
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L, H, C, size = 2 * RIGHT_ANGLE_SIZE
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)
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self.play(
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FadeIn(triangle2),
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FadeIn(right_angle2)
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)
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self.wait()
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self.play(
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FadeOut(triangle2),
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FadeOut(right_angle2)
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)
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self.wait()
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# collect the newly created mobs (in arrays)
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@ -3627,8 +3678,44 @@ class PondScene(ThreeDScene):
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scale = 2**(max_it - 4)
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TEX_SCALE *= scale
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for i in range(3,max_it + 1):
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construction_step(i, show_steps = False, run_time = 4.0/2**i)
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# for i in range(3,max_it + 1):
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# construction_step(i, show_steps = False, run_time = 4.0/2**i,
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# simultaneous_splitting = True)
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# simultaneous expansion of light sources from now on
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self.play(FadeOut(self.inner_lake))
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for n in range(3,max_it + 1):
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new_lake = self.outer_lake.copy().scale(2,about_point = self.obs_dot.get_center())
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for ls in self.light_sources_array:
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lsp = ls.copy()
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self.light_sources.add(lsp)
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self.add(lsp)
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self.light_sources_array.append(lsp)
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new_lake_center = new_lake.get_center()
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new_lake_radius = 0.5 * new_lake.get_width()
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shift_list = (Transform(self.outer_lake,new_lake),)
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for i in range(2**n):
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theta = -TAU/4 + (i + 0.5) * TAU / 2**n
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v = np.array([np.cos(theta), np.sin(theta),0])
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pos1 = new_lake_center + new_lake_radius * v
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pos2 = new_lake_center - new_lake_radius * v
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shift_list += (self.light_sources.submobjects[i].move_source_to,pos1)
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shift_list += (self.light_sources.submobjects[i+2**n].move_source_to,pos2)
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self.play(*shift_list)
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return
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#self.revert_to_original_skipping_status()
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@ -3836,8 +3923,8 @@ class FinalSumManipulationScene(PiCreatureScene):
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self.wait()
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ls_template = LightSource(
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radius = 4,
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num_levels = 40,
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radius = 1,
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num_levels = 10,
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max_opacity_ambient = 0.5,
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opacity_function = inverse_quadratic(1,0.75,1)
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)
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@ -3854,14 +3941,18 @@ class FinalSumManipulationScene(PiCreatureScene):
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number_at_center = 0,
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stroke_width = LAKE_STROKE_WIDTH,
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stroke_color = LAKE_STROKE_COLOR,
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numbers_to_show = odd_range,
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#numbers_to_show = full_range,
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number_scale_val = 0.5,
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numbers_with_elongated_ticks = [],
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unit_size = unit_length,
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tick_frequency = 1,
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line_to_number_buff = MED_LARGE_BUFF,
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include_tip = True
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line_to_number_buff = MED_SMALL_BUFF,
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include_tip = True,
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label_direction = UP,
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)
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self.number_line1.next_to(2.5 * UP + 3 * LEFT, RIGHT, buff = 0.3)
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self.number_line1.add_numbers()
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odd_lights = VMobject()
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for i in odd_range:
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@ -3871,7 +3962,7 @@ class FinalSumManipulationScene(PiCreatureScene):
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odd_lights.add(ls)
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self.play(
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ShowCreation(self.number_line1),
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ShowCreation(self.number_line1, run_time = 5),
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)
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self.wait()
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@ -3899,6 +3990,7 @@ class FinalSumManipulationScene(PiCreatureScene):
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result1 = TexMobject("{\pi^2\over 8} =", fill_color = LIGHT_COLOR,
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stroke_color = LIGHT_COLOR)
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result1.next_to(self.number_line1, LEFT, buff = 0.5)
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result1.shift(0.87 * vertical_spacing)
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self.play(Write(result1))
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@ -3907,6 +3999,7 @@ class FinalSumManipulationScene(PiCreatureScene):
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self.number_line2 = self.number_line1.copy()
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self.number_line2.numbers_to_show = full_range
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self.number_line2.shift(2 * vertical_spacing)
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self.number_line2.add_numbers()
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full_lights = VMobject()
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@ -3918,18 +4011,30 @@ class FinalSumManipulationScene(PiCreatureScene):
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full_lights.add(ls)
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self.play(
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ShowCreation(self.number_line2),
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ShowCreation(self.number_line2, run_time = 5),
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)
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self.wait()
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full_lighthouses = VMobject()
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full_ambient_lights = VMobject()
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for ls in full_lights:
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full_lighthouses.add(ls.lighthouse)
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full_ambient_lights.add(ls.ambient_light)
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self.play(
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LaggedStart(FadeIn, full_lighthouses, lag_ratio = 0.2, run_time = 3),
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)
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for ls in full_lights.submobjects:
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self.play(
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FadeIn(ls.lighthouse, run_time = 0.1),#5 * switch_on_time),
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SwitchOn(ls.ambient_light, run_time = 0.1)#5 * switch_on_time),
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)
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self.play(
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LaggedStart(SwitchOn, full_ambient_lights, lag_ratio = 0.2, run_time = 3)
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)
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# for ls in full_lights.submobjects:
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# self.play(
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# FadeIn(ls.lighthouse, run_time = 0.1),#5 * switch_on_time),
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# SwitchOn(ls.ambient_light, run_time = 0.1)#5 * switch_on_time),
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# )
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@ -3964,13 +4069,13 @@ class FinalSumManipulationScene(PiCreatureScene):
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self.play(
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Transform(even_lights,full_lights)
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Transform(even_lights,full_lights, run_time = 2)
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)
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self.wait()
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for i in range(5):
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for i in range(6):
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self.play(
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Transform(even_lights[i], even_lights_copy[i])
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)
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@ -4013,11 +4118,6 @@ class FinalSumManipulationScene(PiCreatureScene):
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four_thirds_label.scale(0.7)
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four_thirds_label.next_to(four_thirds_arrow.get_center(), LEFT)
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self.play(
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ReplacementTransform(three_quarters_arrow, four_thirds_arrow),
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ReplacementTransform(three_quarters_label, four_thirds_label)
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)
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self.wait()
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self.play(
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FadeOut(quarter_label),
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@ -4028,6 +4128,11 @@ class FinalSumManipulationScene(PiCreatureScene):
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)
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self.wait()
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self.play(
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ReplacementTransform(three_quarters_arrow, four_thirds_arrow),
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ReplacementTransform(three_quarters_label, four_thirds_label)
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)
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self.wait()
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full_terms = VMobject()
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for i in range(1,8): #full_range:
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@ -4041,6 +4146,8 @@ class FinalSumManipulationScene(PiCreatureScene):
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term.move_to(self.number_line2.number_to_point(i))
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full_terms.add(term)
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#return
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self.play(
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FadeOut(self.number_line1),
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FadeOut(odd_lights),
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@ -4053,6 +4160,7 @@ class FinalSumManipulationScene(PiCreatureScene):
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v = (sum_vertical_spacing + 0.5) * UP
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self.play(
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odd_terms.shift, v,
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result1.shift, v,
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four_thirds_arrow.shift, v,
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four_thirds_label.shift, v,
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odd_terms.shift, v,
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@ -4198,6 +4306,47 @@ class ArcHighlightOverlayScene(Scene):
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class ThumbnailScene(Scene):
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def construct(self):
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equation = TexMobject("1+{1\over 4}+{1\over 9}+{1\over 16}+{1\over 25}+\dots")
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equation.scale(2.)
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equation.to_edge(UP)
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q_mark = TexMobject("?").scale(5)
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q_mark.next_to(equation)
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lake_radius = 2
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lake_center = DOWN
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op_scale = 0.5
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lake = Circle(
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fill_color = LAKE_COLOR,
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fill_opacity = LAKE_OPACITY,
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radius = lake_radius,
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stroke_color = LAKE_STROKE_COLOR,
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stroke_width = LAKE_STROKE_WIDTH,
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)
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lake.move_to(lake_center)
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for i in range(8):
|
||||
theta = -TAU/4 + (i + 0.5) * TAU/8
|
||||
pos = lake_center + lake_radius * np.array([np.cos(theta), np.sin(theta), 0])
|
||||
ls = LightSource(
|
||||
radius = 5.0,
|
||||
num_levels = 100,
|
||||
max_opacity_ambient = 0.8,
|
||||
opacity_function = inverse_quadratic(1,op_scale,1)
|
||||
)
|
||||
ls.move_source_to(pos)
|
||||
lake.add(ls.ambient_light, ls.lighthouse)
|
||||
|
||||
self.add(lake)
|
||||
|
||||
self.add(equation) #, q_mark)
|
||||
|
||||
self.wait()
|
||||
|
||||
|
||||
|
||||
|
||||
|
|
|
|||
Loading…
Add table
Reference in a new issue