Basic Questions & Answers thread

I am struggling to understand the S3K disassembly with a lack of notes and labels, so I will ask here: when the gravity is reversed in S3K, how are the left and right controls kept consistent for the ceiling? It's not just a matter of simply reversing the y velocity, right?

 

Yeah, it basically is. There are some checks for managing angles while upside down as well, like in Call_Player_AnglePos, which I would believe helps contribute to the controls not being reversed (comments added by me):



And of course, collision detection with floors and ceilings are reversed as well.

 

Okay, so there's some stuff going on with the angles as well. Good to know.

What do you mean by this? Are the player's sensors reversed?

 

That's basically how it works, yeah. I mean, his feet sensors have to point upward in order to properly collide with ceilings after all.

 

How I can do to make Sonic run in the intro of the level?
Like in Sonic Megamix:

 

Code (Text):

1. move.w    #$800,obInertia(a0)

at the start of Sonic_Main.