rigid_mechanics#
A gravity simulation space.
Most objects can be made into a rigid body (moves according to gravity and collision) or a static body (stays still within the scene).
To use this feature, the SpaceScene must be used, to access
the specific functions of the space.
Note
This feature utilizes the pymunk package. Although unnecessary, it might make it easier if you knew a few things on how to use it.
A low frame rate might cause some objects to pass static objects as they don’t register collisions finely enough. Trying to increase the config frame rate might solve the problem.
Examples
Example: TwoObjectsFalling ¶
from manim import *
from manim_physics import *
# use a SpaceScene to utilize all specific rigid-mechanics methods
class TwoObjectsFalling(SpaceScene):
def construct(self):
circle = Circle().shift(UP)
circle.set_fill(RED, 1)
circle.shift(DOWN + RIGHT)
rect = Square().shift(UP)
rect.rotate(PI / 4)
rect.set_fill(YELLOW_A, 1)
rect.shift(UP * 2)
rect.scale(0.5)
ground = Line([-4, -3.5, 0], [4, -3.5, 0])
wall1 = Line([-4, -3.5, 0], [-4, 3.5, 0])
wall2 = Line([4, -3.5, 0], [4, 3.5, 0])
walls = VGroup(ground, wall1, wall2)
self.add(walls)
self.play(
DrawBorderThenFill(circle),
DrawBorderThenFill(rect),
)
self.make_rigid_body(rect, circle) # Mobjects will move with gravity
self.make_static_body(walls) # Mobjects will stay in place
self.wait(5)
# during wait time, the circle and rect would move according to the simulate updater
from manim_physics import *
# use a SpaceScene to utilize all specific rigid-mechanics methods
class TwoObjectsFalling(SpaceScene):
def construct(self):
circle = Circle().shift(UP)
circle.set_fill(RED, 1)
circle.shift(DOWN + RIGHT)
rect = Square().shift(UP)
rect.rotate(PI / 4)
rect.set_fill(YELLOW_A, 1)
rect.shift(UP * 2)
rect.scale(0.5)
ground = Line([-4, -3.5, 0], [4, -3.5, 0])
wall1 = Line([-4, -3.5, 0], [-4, 3.5, 0])
wall2 = Line([4, -3.5, 0], [4, 3.5, 0])
walls = VGroup(ground, wall1, wall2)
self.add(walls)
self.play(
DrawBorderThenFill(circle),
DrawBorderThenFill(rect),
)
self.make_rigid_body(rect, circle) # Mobjects will move with gravity
self.make_static_body(walls) # Mobjects will stay in place
self.wait(5)
# during wait time, the circle and rect would move according to the simulate updater
Classes
An Abstract object for gravity. |
|
A basis scene for all of rigid mechanics. |
Functions