add_the_fork_trail: Add the fork trail to a frame drawing
In ghuiber/bicycle: Design a bicycle frame

Description Usage Arguments Value See Also

Once you have the fork rake, you might as well visualize the trail. Warning: this requires a frame design tibble df that has the columns added by find_ht_extension_and_add_true_fork(). A minimal df tibble as drawn by wrap_frame_dims() will not be sufficient. If all went well, when we draw a fork starting at the bottom end of the HT extension, with a given rake and cta length, it will end up exactly at the top end of the rake line.

add_the_fork_trail(
  x,
  df,
  wheel_diameter = 622,
  c = I("black"),
  alpha_factor = 1
)

`x`	An existing ggplot object. At a minimum, it's a scatter plot of the rear dropout center. But it can be a bicycle frame of a previous design already drawn, onto which you can now overlay a new design using the dims in `df` for easy comparison.
`df`	A frame design tibble, such as the minimal one drawn by `wrap_frame_dims()` or the one augmented by `find_ht_extension_and_add_true_fork()`.
`wheel_diameter`	Wheel diameter in millimeters; 622 is the bead seat diameter of a 700c wheel. To see the effect of the tire width, add 2 x tire width in millimeters – i.e. specify `wheel_diameter = 622 + 2 * 32` for a 32 mm tire.
`c`	The color of the line segments.
`alpha_factor`	The transparency of the line segments, `alpha`.