Wrong cart rotation on slopes

[richard627z]

The minecart passes through the railway when it goes up. It can not go up correctly.

[appgurueu]

1. Which MTG version?
2. Steps to reproduce?

[richard627z]

It is the latest version.

The details are below.

The two minecarts also pass through each other.

It seems like the collision detection problem.

2.mp4

[appgurueu]

The two minecarts also pass through each other.

I believe this is intended; the minecart being incorrectly rotated is definitely not intended.

The cart failing to climb the slope however may be intended: Have you tried pushing the cart harder / a couple more times / while climbing the slope to get it over it? Or using accelerator rails?

[richard627z]

Thanks.

I think it will be great if it can act like this in Minecraft. The cart will go back if it can not climb the slope rather than being stuck.

cart.mp4

[MidnightPhantom]

Same happens with me too

[appgurueu]

I have confirmed this issue.

[Wuzzy2]

The issue description is terrible. Here's the real bug description:

The real bug description

If you punch a cart to move it up towards a slope, but the cart is too slow to take the whole slope, it will stop at the slope (expected) but then it rotates the wrong way (as seen in screenshot).
The cart must be so slow that it stops right at the slope.
If a cart goes the slope upwards at the full speed, it works fine. If the cart fails to take the slope, but returns far enough to go back on the straight level track again (so that is no longer on the slope), it also works fine.
Tested in 5.5.1.

Analysis

I believe the bug happens because the cart internally "turns around" when it stops at the slope. And then the cart is both at the slope but rotated the other way so that it thinks it goes down the slope.

I therefore believe the fix would be to force to believe the cart is going downwards when it is at the slope but at 0 (or near-0) speed. Either that, or make the cart stand upright (pick whatever seems better for you).

[Wuzzy2]

It appears 38307da might have already fixed this. @SmallJoker

[appgurueu]

It appears 38307da might have already fixed this. @SmallJoker

It only partially fixed this; it still looks very wrong and the cart doesn't roll downwards as it should.