[018]Line/DashedLine

Line: draw simple line

        grid = self.get_grid(-7, 7, 1, -4, 4, 1)
        self.add(grid)

        line = Line(stroke_color=RED, stroke_width=8)

        self.add(line)
        self.wait()

---

Line: draw line between two points

        a = np.array([-1,1,0])
        b = np.array([1, -1, 0])

        line = Line(a,b)
        self.add(line)
        self.wait()

 

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Line: stroke_color, stroke_width

line = Line(stroke_color=RED, stroke_width=6)

 

 

 

    def change_stroke_width(self):
        def get_line(w):
            line = Line(stroke_width=w)
            t = Text(str(w), size=0.3, stroke_width=0).next_to(line, LEFT, buff=0.2)
            return VGroup(t,line)

        lines = VGroup(*[get_line(w) for w in range(1,11)])

        lines.to_edge(UP, buff=0.5).arrange(DOWN, buff=0.5)
        self.add(lines)
        self.wait()

---

DashedLine

    line_1 = DashedLine(LEFT, RIGHT*2)

    line_2 = DashedLine(LEFT, RIGHT)
    line_2.set_length(3)

    line_3 = DashedLine(LEFT, UR, color=RED, opacity=0.7, stroke_width=10)
    line_3.set_length(3)

---

DashedLine: dash_length

        n = [0.01, 0.05, 0.1, 0.15, 0.2, 0.25, 0.3]

        group = VGroup()
        for k in n:
            text = Text("dash_length=" + str(k), size=0.2, stroke_width=0)
            line = DashedLine(LEFT*3,RIGHT, dash_length=k)
            line.next_to(text,RIGHT)
            group.add(VGroup(text,line))

        group.to_edge(UP,buff=1)
        group.arrange(DOWN, buff=0.5)

        self.add(group)
        self.wait()