Sidescroller - Minecart - Railsystem - How to move along rails with intersections?

Hey Folks,

i am currently programming a little sidescroller game where the player can build rails and use a "minecart" to fasttravel. The rails are placed on a 128 x 128 grid.

For the minecart movement i tested

- Platform behavior

- Physics beahvior

- Move to behavior

Platform behavior worked the best so far but brings big troubles with intersections

Physicsbeahvior is to wonky to be used here, also collision detection might be a problem.

I found this construct.net/en/forum/construct-3/how-do-i-8/keep-object-train-curve-rail-143038 thread whcih describes a move to behavior, which seems to be the best aproach, but even this seems to be a bit choppy when used at higher speeds meaning the "breaking" looks a "bit" off. Also it seems to be more suitable for a path which does not change... But with intersections is a different storry.

So if the player presses down and there is an option to go straight or down the down path should be chosen.

How would you solve this? Is there even a good approach to this? What would be your starting point?

Physics seem to be nice, as the cart would roll down when on a hill or slow down when going up but it does not seem to be useable.

Kind regards

Joschi

I imagine platform would be most suitable. What issues are you having with intersections and how did you set them up?

This is mostly a case where left and right are constantly activated and speed set, while using jumpthrough for "rail" platforms and the fallthrough action should get you most of the way there, unless you are aiming for other specific behavior.

Diagonals and high speeds can cause other issues you may need to work around that I'm not familiar with though.

Jea i tested a lot with those already but did not get a good result as mentioned... I have to simulate the "jumps" as the minecart cant really jump haha :D Well, i guess i could change it so, that the minecart can actually jump and you dont have those diagonal rails connecting... Not the best solution imho but it would be a solution i guess.

Well yea you go upwards till you hit a wall (1)

Thing is jump through does not work wenn you "run" into a ceiling haha :D

One way solids are actually some starting point, i will play arround with it more, unfortunately most of the examples from the old posts are not there anymore :(

Thanks!

Sorry it's been a while since I worked with the platformer behavior. Messed around with it a bit and this is a more difficult problem than I originally thought. Platforming mechanics are always deceptively simple but actually quite complicated.

To approach this I would probably want some additional hitboxes and special logic for "stairs".

Additionally I think I'd have everything above the bottom of the character hitbox to not be solid until the bottom of the player collision box rises above the horizontal level of the top of any given platform.