work in progress
First we will define some variables and provide the memory location the game uses to reference them.
| variable name | memory location | description |
|---|
| x speed | 7e0408,2s | positive is moving to the right |
| y speed | 7e040a,2s | positive is falling |
| x pos | 7e0404,2u | the farther to the right the higher
|
| y pos | 7e0406,2u | the lower the higher
|
| str len | 7e0604,1s | the amount of line out, possible to make negative somehow
|
| str stretch | 7e0602,1u | the length of the line stretched
|
| x hook | 7e0500,2u | x location of tip of hook (in pixels)
|
| y hook | 7e0502,2u | |
| x dim(pixels) | 7e040c,2u | x dim / 64 |
| y dim(pixels) | 7e040e,2u | |
Note this is not the actual order things are evaluated in
Movement
Every frame:
- x dim = x dim + x speed
- y dim = y dim + y speed
- if hit wall x speed = 0
- if hit floor/ceiling y speed = 0
Gravity
Speed limits
- if any dimensions speed > 384 then that dimensions speed = 384
Horizontal Control
- note horizontal control will not exceed a speed of 96
- if on ground and pressing left/right then
- if moving x speed += 8
- else x speed += 16
- if in air and pressing left/right then speed += 4
Vertical Control
- if just jumped y speed = -256
- if just walked off a cliff y speed = 80
Friction
- if in air x speed -= 1 (once every 4 frames)
- if on ground x speed -= 8 (unless walking under 96)
- if on ground and crouching x speed -= 16 (instead of 8)
Rope
- rope travels at 4 pixels per second
- returns at 8 pixels per second
- max rope length = ~104, at this length it will begin to return
- min rope length = unknown (possible to get negative using sea horse in f36)
- breaks when a certain force or length is reached
Rope control
- After holding down (and not left/right) for about 10 frames rope will suck in at 2 per second
- After holding up (and not left/right) for about 10 frames rope will release at 2 per second TODO: Double check)
- Cannot pull in rope if force is too strong (unknown exact value / formula)
Rope forces
- if str stretch > str len then do nothing
- else a realistic forumla is used, exact formula not known but it is something like this:
- xspeed += sin(angle) * (str stretch - str len) * 2
- yspeed += cos(angle) * (str stretch - str len) * 2
- max acceleration (due to rope) = 60
- TODO: Be more accurate, I forget what the number 72 has to do with this
Miscellaneous
- if near ladder / exit door and press up/down then x speed = 56 in that direction
- if get off ladder then x speed = 64
- the fish hook is a solid object and has length, it is what causes you to move away from the wall when bouncing up and down
down,
clip,
lag