| from manim import * | |
| import manim.mobject.geometry.tips as tips | |
| # https://discord.com/channels/581738731934056449/1370706466541011055/1370728872416514141 | |
| class reasonablyTipped(Scene): | |
| def construct(self): | |
| def add_tip( | |
| line, | |
| shorten=True, | |
| tip_shape: type[tips.ArrowTip] | None = None, | |
| tip_length: float | None = None, | |
| tip_width: float | None = None, | |
| ): | |
| tip = line.get_unpositioned_tip( | |
| tip_length=tip_length, | |
| tip_shape = tip_shape, | |
| tip_width = tip_width, | |
| ) | |
| tipangle = Line(tip.base, tip.tip_point).get_angle() | |
| angle = Line(line.point_from_proportion(0.999),line.point_from_proportion(1.0)).get_angle() | |
| tip.rotate(angle-tipangle,about_point=tip.base) | |
| tip.shift(line.get_end()-tip.tip_point) | |
| if shorten==True: | |
| points = line.get_all_points() | |
| points[-1]=tip.base | |
| line.set_points(points) | |
| line.add(tip) | |
| return line | |
| Line.add_tip = add_tip | |
| npl = NumberPlane().add_coordinates() | |
| self.add(npl) | |
| line1 = Line([5,3,0],[2,2,0]).add_tip(tip_length=0.2) | |
| line2 = Line([5,3,0],[5,0,0]).add_tip(tip_length=0.5) | |
| line3 = Line().add_points_as_corners( | |
| [[6,-1,0],[5,-2,0],[4,-1,0],[3,-2,0],[2,-1,0]] | |
| ).add_tip_nodist(tip_length=0.5) | |
| self.add(line1,line2,line3) | |
| line1a = Line([-5,3,0],[-2,2,0]).add_tip(shorten=False, tip_length=0.2) | |
| line2a = Line([-5,3,0],[-5,0,0]).add_tip(shorten=False, tip_length=0.5) | |
| line3a = Line().add_points_as_corners( | |
| [[-6,-1,0],[-5,-2,0],[-4,-1,0],[-3,-2,0],[-2,-1,0]] | |
| ).add_tip_nodist(shorten=False, tip_length=0.5) | |
| self.add(line1a,line2a,line3a) |
When adding a tip to a line in ManimCE using .add_tip() then the complete line
object is adjusted to a new shorter length to make space for the tip. Nice for straight
lines, but not so nice if you have a line object with corners.
This is a rough attempt to add a tip without this distorsion.
