VGrooveJoint¶

Qualified name: manim\_pymunk.constraints.VGrooveJoint

class VGrooveJoint(a_mob, b_mob, groove_a_local=array([1., 0., 0.]), groove_b_local=array([2., 0., 0.]), anchor_b_local=array([0., 0., 0.]), groove_a_appearance=Dot, groove_b_appearance=Dot, anchor_b_appearance=Dot, groove_line_class=<class 'manim.mobject.geometry.line.Line'>, groove_line_config={'color': ManimColor('#F7D96F'), 'stroke_width': 2}, **kwargs)[source]¶

Bases: VConstraint

Initializes a Groove Joint constraint between two Mobjects.

A Groove Joint constrains a point on the second body to a line segment (the “groove”) on the first body. The groove is defined by two points relative to the first body’s center, and the anchor point is relative to the second body’s center.

Parameters¶

a_mob: The Mobject that contains the groove (the rail/track).
b_mob: The Mobject that contains the sliding anchor (the slider).
groove_a_local: The start point of the groove, in a_mob’s local coordinates.
groove_b_local: The end point of the groove, in a_mob’s local coordinates.
anchor_b_local: The anchor point on b_mob that slides within the groove, in local coordinates.
groove_a_appearance: Visual Mobject representing the start of the groove.
groove_b_appearance: Visual Mobject representing the end of the groove.
anchor_b_appearance: Visual Mobject representing the sliding anchor on the second body.
groove_line_class: The Manim class used to draw the groove line (e.g., Line or DashedLine).
groove_line_config: Configuration dictionary for the styling of the groove line.

Examples¶

Example: VGrooveJointExample ¶

from manim import *

from manim_pymunk import *

class VGrooveJointExample(SpaceScene):
    def construct(self):

        static_dot = Dot()

        square_1 = Square().move_to(static_dot)
        square_2 = Square().move_to(static_dot.get_center() + RIGHT * 4).scale(0.3)

        constraints = [
            VGrooveJoint(
                square_1,
                square_2,
                groove_a_local=RIGHT * 2,
                groove_b_local=RIGHT * 4,
            ),
            VPinJoint(static_dot, square_1),
        ]

        self.add_static_body(static_dot)
        self.add_dynamic_body(square_1, angular_velocity=PI * 2)
        self.add_dynamic_body(square_2)

        self.add_shapes_filter(static_dot, square_1, square_2, group=2)
        self.add_constraints(*constraints)
        self.wait(6)

from manim_pymunk import *

class VGrooveJointExample(SpaceScene):
    def construct(self):

        static_dot = Dot()

        square_1 = Square().move_to(static_dot)
        square_2 = Square().move_to(static_dot.get_center() + RIGHT * 4).scale(0.3)

        constraints = [
            VGrooveJoint(
                square_1,
                square_2,
                groove_a_local=RIGHT * 2,
                groove_b_local=RIGHT * 4,
            ),
            VPinJoint(static_dot, square_1),
        ]

        self.add_static_body(static_dot)
        self.add_dynamic_body(square_1, angular_velocity=PI * 2)
        self.add_dynamic_body(square_2)

        self.add_shapes_filter(static_dot, square_1, square_2, group=2)
        self.add_constraints(*constraints)
        self.wait(6)

Methods

`install`	Verify the validity of constraint parameters.
`mob_updater`	Visual control updater

Attributes

`always`	Call a method on a mobject every frame.
`animate`	Used to animate the application of any method of `self`.
`animation_overrides`
`color`
`depth`	The depth of the mobject.
`fill_color`	If there are multiple colors (for gradient) this returns the first one
`height`	The height of the mobject.
`n_points_per_curve`
`sheen_factor`
`stroke_color`
`width`	The width of the mobject.

_abc_impl = <_abc._abc_data object>¶

_bezier_t_values: npt.NDArray[float]¶

_original__init__(a_mob, b_mob, groove_a_local=array([1., 0., 0.]), groove_b_local=array([2., 0., 0.]), anchor_b_local=array([0., 0., 0.]), groove_a_appearance=Dot, groove_b_appearance=Dot, anchor_b_appearance=Dot, groove_line_class=<class 'manim.mobject.geometry.line.Line'>, groove_line_config={'color': ManimColor('#F7D96F'), 'stroke_width': 2}, **kwargs)¶

Initialize self. See help(type(self)) for accurate signature.

Parameters:

a_mob (Mobject)
b_mob (Mobject)
groove_a_local (list[float, float, float])
groove_b_local (list[float, float, float])
anchor_b_local (list[float, float, float])
groove_a_appearance (Mobject)
groove_b_appearance (Mobject)
anchor_b_appearance (Mobject)
groove_line_class (Line | None)
groove_line_config (dict)

animation_overrides = {}¶

background_image: Image | str | None¶

background_stroke_color: ManimColor¶

background_stroke_opacity: float¶

background_stroke_width: float¶

cap_style: CapStyleType¶

close_new_points: bool¶

constraint: GrooveJoint | None¶

install(space)[source]¶

Verify the validity of constraint parameters.

Parameters:: space (Space)

joint_type: LineJointType¶

make_smooth_after_applying_functions: bool¶

mob_updater(mob, dt)[source]¶: Visual control updater

n_points_per_cubic_curve: int¶

pre_function_handle_to_anchor_scale_factor: float¶

shade_in_3d: bool¶

submobjects: list[VMobject]¶

tolerance_for_point_equality: float¶

Parameters:

a_mob (Mobject)
b_mob (Mobject)
groove_a_local (list[float, float, float])
groove_b_local (list[float, float, float])
anchor_b_local (list[float, float, float])
groove_a_appearance (Mobject)
groove_b_appearance (Mobject)
anchor_b_appearance (Mobject)
groove_line_class (Line | None)
groove_line_config (dict)