A complete guide to Super Metroid speedrunning - User contributions [en]

Vertical Speed

2021-06-09T05:30:03Z

Idlechild: Bomb Jump HGBFS was listed as 34.62464, but mathematically it should be 35.62464. Testing on practice rom confirms 35.62464.

== Introduction ==

There are two memory addresses for vertical speed. The first can either have a value of 1 or 2, where 1 is for rising and 2 is for falling. The second is for the vertical speed, and is always used regardless of the first's value.

Rising speed starts with a value which decreases by 7168 subpixels per frame. After the value goes under zero, the first address will switch from 1 to 2, and Samus will start to fall.

The values can be read as "pixels.subpixels."

The maximum amount of subpixels is 65536. You simply divide the decimal (subpixel) amount by 65536 to find the fraction of pixels involved.

"Ramp" means the amount of frames the source takes to reach the amount listed in the column.

"HGBFS" stands for "height gained before falling starts."

Crouching before jumping will cause Samus to begin her jump eight pixels higher than if she did not crouch.

[[Moonfall]] is a glitch that underflows the fall speed, allowing you to continuously gain speed without hitting the cap. When doing a moonfall, the address used for direction has a value of 0.

== Speed Values ==

'''Falling'''

{| class="wikitable sortable" style="text-align:center" cellpadding="20"
|-
! Movement !! Amount !! Ramp !! Notes
|-
| Falling || 5.02048 || 46 || 7168 subpixel increase per frame
|}

'''Falling (underwater without [[Gravity Suit]] equipped)'''

{| class="wikitable sortable" style="text-align:center" cellpadding="20"
|-
! Movement !! Amount !! Ramp !! Notes
|-
| Falling || 5 || 60 || 2048 subpixel increase per frame
|}

'''Rising'''

{| class="wikitable sortable" style="text-align:center" cellpadding="20"
|-
! Movement !! Amount !! Ramp !! HGBFS !! Notes
|-
| Jump / [[Space Jump]] || 4.57344 || 46 || 111.06144 || Same values apply to [[Spring Ball]]
|-
| Jump / [[Space Jump]] ([[Hi-Jump Boots]]) || 6.00000 || 56 || 167.37888 || Same values apply to [[Spring Ball]]
|-
| [[Walljump]] || 4.40960 || 44 || 100.7168 ||
|-
| [[Walljump]] ([[Hi-Jump Boots]]) || 5.32768 || 52 || 140.62464 ||
|-
| [[Bomb Jump]] || 2.49152 || 27 || 35.62464 ||
|-
| [[Shinespark]] || 14.? || 2 || N/A || 7.07168 for first frame, then 14.? for all frames after (before crashing occurs); subpixel speed per frame is either random or uses an indiscernible pattern
|}

'''Rising (underwater without Gravity Suit equipped)'''

{| class="wikitable sortable" style="text-align:center" cellpadding="20"
|-
! Movement !! Amount !! Ramp !! HGBFS !! Notes
|-
| Jump || 1.49152 || ? || ? ||
|-
| Jump ([[Hi-Jump Boots]]) || ? || ? || ? ||
|-
| [[Walljump]] || ? || ? || ? ||
|-
| [[Walljump]] ([[Hi-Jump Boots]]) || ? || ? || ? ||
|-
| [[Shinespark]] || 14.? || 2 || N/A || 7.07168 for first frame, then 14.? for all frames after (before crashing occurs); subpixel speed per frame is either random or uses an indiscernible pattern
|}

== Compared with Run Speed ==

[[File:GalamozJumpSpeed.png|617px]]

[https://pastebin.com/GEyywzs1 Writeup from FreyasSpirit on why this chart is non-linear]

== See also ==

* [[General Movement]]
* [[Horizontal Speed]]
* [https://imgur.com/a/VP5jP Original source for the jump speed chart]

Vertical Speed

2021-06-09T05:17:52Z

Idlechild: The math got flipped for walljump HGBFS value; it was listed at 101.58368 but it should be 100.7168.

== Introduction ==

There are two memory addresses for vertical speed. The first can either have a value of 1 or 2, where 1 is for rising and 2 is for falling. The second is for the vertical speed, and is always used regardless of the first's value.

Rising speed starts with a value which decreases by 7168 subpixels per frame. After the value goes under zero, the first address will switch from 1 to 2, and Samus will start to fall.

The values can be read as "pixels.subpixels."

The maximum amount of subpixels is 65536. You simply divide the decimal (subpixel) amount by 65536 to find the fraction of pixels involved.

"Ramp" means the amount of frames the source takes to reach the amount listed in the column.

"HGBFS" stands for "height gained before falling starts."

Crouching before jumping will cause Samus to begin her jump eight pixels higher than if she did not crouch.

[[Moonfall]] is a glitch that underflows the fall speed, allowing you to continuously gain speed without hitting the cap. When doing a moonfall, the address used for direction has a value of 0.

== Speed Values ==

'''Falling'''

{| class="wikitable sortable" style="text-align:center" cellpadding="20"
|-
! Movement !! Amount !! Ramp !! Notes
|-
| Falling || 5.02048 || 46 || 7168 subpixel increase per frame
|}

'''Falling (underwater without [[Gravity Suit]] equipped)'''

{| class="wikitable sortable" style="text-align:center" cellpadding="20"
|-
! Movement !! Amount !! Ramp !! Notes
|-
| Falling || 5 || 60 || 2048 subpixel increase per frame
|}

'''Rising'''

{| class="wikitable sortable" style="text-align:center" cellpadding="20"
|-
! Movement !! Amount !! Ramp !! HGBFS !! Notes
|-
| Jump / [[Space Jump]] || 4.57344 || 46 || 111.06144 || Same values apply to [[Spring Ball]]
|-
| Jump / [[Space Jump]] ([[Hi-Jump Boots]]) || 6.00000 || 56 || 167.37888 || Same values apply to [[Spring Ball]]
|-
| [[Walljump]] || 4.40960 || 44 || 100.7168 ||
|-
| [[Walljump]] ([[Hi-Jump Boots]]) || 5.32768 || 52 || 140.62464 ||
|-
| [[Bomb Jump]] || 2.49152 || 27 || 34.62464 ||
|-
| [[Shinespark]] || 14.? || 2 || N/A || 7.07168 for first frame, then 14.? for all frames after (before crashing occurs); subpixel speed per frame is either random or uses an indiscernible pattern
|}

'''Rising (underwater without Gravity Suit equipped)'''

{| class="wikitable sortable" style="text-align:center" cellpadding="20"
|-
! Movement !! Amount !! Ramp !! HGBFS !! Notes
|-
| Jump || 1.49152 || ? || ? ||
|-
| Jump ([[Hi-Jump Boots]]) || ? || ? || ? ||
|-
| [[Walljump]] || ? || ? || ? ||
|-
| [[Walljump]] ([[Hi-Jump Boots]]) || ? || ? || ? ||
|-
| [[Shinespark]] || 14.? || 2 || N/A || 7.07168 for first frame, then 14.? for all frames after (before crashing occurs); subpixel speed per frame is either random or uses an indiscernible pattern
|}

== Compared with Run Speed ==

[[File:GalamozJumpSpeed.png|617px]]

[https://pastebin.com/GEyywzs1 Writeup from FreyasSpirit on why this chart is non-linear]

== See also ==

* [[General Movement]]
* [[Horizontal Speed]]
* [https://imgur.com/a/VP5jP Original source for the jump speed chart]