Ejemplo n.º 1
0
    def coords_to_vector(self,
                         vector,
                         coords_start=2 * RIGHT + 2 * UP,
                         clean_up=True):
        starting_mobjects = list(self.mobjects)
        array = Matrix(vector)
        array.shift(coords_start)
        arrow = Vector(vector)
        x_line = Line(ORIGIN, vector[0] * RIGHT)
        y_line = Line(x_line.get_end(), arrow.get_end())
        x_line.set_color(X_COLOR)
        y_line.set_color(Y_COLOR)
        x_coord, y_coord = array.get_mob_matrix().flatten()

        self.play(Write(array, run_time=1))
        self.wait()
        self.play(
            ApplyFunction(
                lambda x: self.position_x_coordinate(x, x_line, vector),
                x_coord))
        self.play(ShowCreation(x_line))
        self.play(
            ApplyFunction(
                lambda y: self.position_y_coordinate(y, y_line, vector),
                y_coord), FadeOut(array.get_brackets()))
        y_coord, brackets = self.get_mobjects_from_last_animation()
        self.play(ShowCreation(y_line))
        self.play(ShowCreation(arrow))
        self.wait()
        if clean_up:
            self.clear()
            self.add(*starting_mobjects)
Ejemplo n.º 2
0
    def coords_to_vector(self, vector, coords_start=2 * RIGHT + 2 * UP, clean_up=True):
        starting_mobjects = list(self.mobjects)
        array = Matrix(vector)
        array.shift(coords_start)
        arrow = Vector(vector)
        x_line = Line(ORIGIN, vector[0] * RIGHT)
        y_line = Line(x_line.get_end(), arrow.get_end())
        x_line.set_color(X_COLOR)
        y_line.set_color(Y_COLOR)
        x_coord, y_coord = array.get_mob_matrix().flatten()

        self.play(Write(array, run_time=1))
        self.wait()
        self.play(ApplyFunction(
            lambda x: self.position_x_coordinate(x, x_line, vector),
            x_coord
        ))
        self.play(ShowCreation(x_line))
        self.play(
            ApplyFunction(
                lambda y: self.position_y_coordinate(y, y_line, vector),
                y_coord
            ),
            FadeOut(array.get_brackets())
        )
        y_coord, brackets = self.get_mobjects_from_last_animation()
        self.play(ShowCreation(y_line))
        self.play(ShowCreation(arrow))
        self.wait()
        if clean_up:
            self.clear()
            self.add(*starting_mobjects)
Ejemplo n.º 3
0
    def vector_to_coords(self, vector, integer_labels=True, clean_up=True):
        starting_mobjects = list(self.mobjects)
        show_creation = False
        if isinstance(vector, Arrow):
            arrow = vector
            vector = arrow.get_end()[:2]
        else:
            arrow = Vector(vector)
            show_creation = True
        array = vector_coordinate_label(arrow, integer_labels=integer_labels)
        x_line = Line(ORIGIN, vector[0] * RIGHT)
        y_line = Line(x_line.get_end(), arrow.get_end())
        x_line.set_color(X_COLOR)
        y_line.set_color(Y_COLOR)
        x_coord, y_coord = array.get_mob_matrix().flatten()
        x_coord_start = self.position_x_coordinate(
            x_coord.copy(), x_line, vector
        )
        y_coord_start = self.position_y_coordinate(
            y_coord.copy(), y_line, vector
        )
        brackets = array.get_brackets()

        if show_creation:
            self.play(ShowCreation(arrow))
        self.play(
            ShowCreation(x_line),
            Write(x_coord_start),
            run_time=1
        )
        self.play(
            ShowCreation(y_line),
            Write(y_coord_start),
            run_time=1
        )
        self.wait()
        self.play(
            Transform(x_coord_start, x_coord, submobject_mode="all_at_once"),
            Transform(y_coord_start, y_coord, submobject_mode="all_at_once"),
            Write(brackets, run_time=1),
        )
        self.wait()

        self.remove(x_coord_start, y_coord_start, brackets)
        self.add(array)
        if clean_up:
            self.clear()
            self.add(*starting_mobjects)
        return array, x_line, y_line