Walker bypasses trap, faller is killed

[SimonN]

trap-inconsistency-Ramond-2016-07-22.txt

Examine the lixes from the right hatch. One bypasses the trap. One is killed by the trap.

Expected instead: Both die, or both survive.

[SimonN]

Equivalent to this bug in C++ Lix: http://asdfasdf.ethz.ch/~simon/bb/topic.php?topic=212

Copy&paste from the description behind that link:

Proposed fix: Put a flag for non-permanent gadgets and flingers in the lookup map. If the lookupmap says the tumber went over a trap, then remember the position of the point where that happened and go through the list of traps to find which one it was.

[SimonN]

• When a walker will fall 7 pixels, he begins with falling 3 pixels in the first frame.
• When a walker will fall 8 pixels, he begins with falling 4 pixels in the first frame.
• When a walker will fall ≥ 9 pixels, he begins with falling 2 pixels in the first frame.

Because of these differences in the first frame, some walkers bypass the trap, others are inside. This is strange code, its purpose is to have smoother movement when the lixes don't stop on landing.

This is not the root cause of the bug, it merely triggers the bug. I still advise the proposed fix from previous post.

[SimonN]

It's still in Lix 0.10.26:

Runners Bypass Exit, Walkers Exit on Lemmings Forums.