Method draw_squiggle

src_classic/utils.py:3395–3430

Draw a squiggly line from p1 to p2.

(
        self,
        p1: point_like,
        p2: point_like,
        breadth=2,
    )

        return p2

    def draw_squiggle(
        self,
        p1: point_like,
        p2: point_like,
        breadth=2,
    ) -> Point:
        """Draw a squiggly line from p1 to p2."""
        p1 = Point(p1)
        p2 = Point(p2)
        S = p2 - p1  # vector start - end
        rad = abs(S)  # distance of points
        cnt = 4 * int(round(rad / (4 * breadth), 0))  # always take full phases
        if cnt < 4:
            raise ValueError("points too close")
        mb = rad / cnt  # revised breadth
        matrix = Matrix(util_hor_matrix(p1, p2))  # normalize line to x-axis
        i_mat = ~matrix  # get original position
        k = 2.4142135623765633  # y of draw_curve helper point

        points = []  # stores edges
        for i in range(1, cnt):
            if i % 4 == 1:  # point "above" connection
                p = Point(i, -k) * mb
            elif i % 4 == 3:  # point "below" connection
                p = Point(i, k) * mb
            else:  # else on connection line
                p = Point(i, 0) * mb
            points.append(p * i_mat)

        points = [p1] + points + [p2]
        cnt = len(points)
        i = 0
        while i + 2 < cnt:
            self.draw_curve(points[i], points[i + 1], points[i + 2])
            i += 2
        return p2

    # ==============================================================================
    # Shape.insert_text