Multiple timing issues while playing ADS scripts

[jno6809]

The timing is not completely faithful to the original yet. In a few cases this causes glitches to appear:

• in WALKSTUF.ADS, scene Waves are moving the wrong direction #1 : the skier girl is drawn in front of Johnny's head while she passes in front of him
• in BUILDING.ADS, scene Sound pops on some hardware #2: the planes sometimes go behind Johnny while they should appear in front

I suspect these are related to the way ADS threads are created and deleted and their layers re-ordered accordingly, but I haven't guessed the logic yet. This is an issue where the disassembly of the original could help.

[xesf]

This may be related with the way new scenes are added to the available slot. The slot may make them out order if other scenes haven't finished yet, but new ones are inserted in between.

[jno6809]

Hi Alexandre!
Yes, it very probably is. And I think it depends, too, on the way previously running threads are freed, and how many total threads are available.
I've put some time already in trying to understand BUILDING.ADS #2, without success. I'm convinced that understanding this one (the most complex one) would be the key. The path of each plane is made of three successive threads, while Johnny is a single thread constantly looping to its beginning. Though, planes going from right to left should always appear behind Johnny, while those going from left to right should appear in front of him.
Note that a first need is to synchronize Johnny's moves with the course of the planes. Even that is not obvious, since the sum of the various delays don't match...