Add missing reeds_shepp curve type in reeds_shepp_path_planning.py

[oridong]

why there is curve type SLS from function " straight_left_straight(x, y, phi) ". I read the paper but this type doesn't exist. Does this code implement the algorithm completely? maybe it lacks the last five base words in the picture

[AtsushiSakai]

@oridong Hi. I don't remember it... maybe I used another paper or oss for implementation, not original paper.

maybe it lacks the last five base words in the picture

Yes, you are right. These should be implemented. Your PR is welcome : )

[lentychang]

Just for extra info:

Following your references, I found from table in page 135 in this dissertation, they propose more effective way to categorize all 48 combinations since these combinations don't all appear at same time. They can be categorized based on the orientation of car and orientation of steering angle (if I understand correctly).

[videh25]

Hey @AtsushiSakai ,

I am trying to solve this issue. Can you please share the material you referred for writing this code?

Will be very helpful.