Vertical Speed - Revision history

EXAKTScience at 06:00, 26 August 2026

2026-08-26T06:00:24Z

2026-08-26T05:59:42Z

Undo revision 10611 by EXAKTScience (talk)

2026-08-25T23:01:51Z

‎Speed Values

2026-08-25T23:01:10Z

‎Speed Values

2026-08-25T22:39:41Z

‎Speed Values

2026-08-25T22:39:17Z

‎Speed Values

2026-08-25T22:20:18Z

‎Introduction

2026-04-10T18:18:22Z

Update jump velocity plots (show discrete frames) and add tile and water variants

2023-01-06T16:28:07Z

fun facts on shinespark subpixel

2023-01-06T02:14:35Z

adding moar values

@@ Line 35: / Line 35: @@
 '''Acceleration'''
-In the various mediums of (air, water, lava/acid), Samus experiences a different acceleration. This changes Samus' speed downwards by this same amount every frame. There are a couple exceptions, for example if she is at her fall speed cap (see next section) or when changing directions (where her speed is first zeroed). The numbers shown are in pixels per frame
+In the various mediums of (air, water, lava/acid), Samus experiences a different acceleration. This changes Samus' speed downwards by this same amount every frame. There are a couple exceptions, for example if she is at her fall speed cap (see next section) or when changing directions (where her speed is first zeroed).
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@@ Line 35: / Line 35: @@
 '''Acceleration'''
-In the various mediums of (air, water, lava/acid), Samus experiences a different acceleration. This changes Samus' speed downwards by this same amount every frame. There are a couple exceptions, for example if she is at her fall speed cap (see next section) or when changing directions (where her speed is first zeroed).
+In the various mediums of (air, water, lava/acid), Samus experiences a different acceleration. This changes Samus' speed downwards by this same amount every frame. There are a couple exceptions, for example if she is at her fall speed cap (see next section) or when changing directions (where her speed is first zeroed). The numbers shown are in pixels per frame
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@@ Line 19: / Line 19: @@
 '''Acceleration of Gravity'''
-The acceleration of gravity is the amount that Samus's speed changes each frame, decreasing it if she is moving upward and increasing it when she is moving downward. There are some exceptions; for example, if she is at her fall speed cap (see next section), or when changing directions (where her speed is first zeroed). The values shown are in pixels per frame per frame and all assume that Samus does not have the ||Gravity Suit|| equipped
+The acceleration of gravity is the amount that Samus's speed changes each frame, decreasing it if she is moving upward and increasing it when she is moving downward. There are some exceptions; for example, if she is at her fall speed cap (see next section), or when changing directions (where her speed is first zeroed). The values shown are in pixels per frame per frame and all assume that Samus does not have the [[Gravity Suit]] equipped
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 == Speed Values ==
-'''Acceleration'''
+'''Acceleration of Gravity'''
-In the various mediums of (air, water, lava/acid), Samus experiences a different acceleration. This changes Samus' speed downwards by this same amount every frame. There are a couple exceptions, for example if she is at her fall speed cap (see next section) or when changing directions (where her speed is first zeroed).
+The acceleration of gravity is the amount that Samus's speed changes each frame, decreasing it if she is moving upward and increasing it when she is moving downward. There are some exceptions; for example, if she is at her fall speed cap (see next section), or when changing directions (where her speed is first zeroed). The values shown are in pixels per frame per frame and all assume that Samus does not have the ||Gravity Suit|| equipped
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@@ Line 25: / Line 25: @@
   ! Region !! Medium !! Acceleration
   |-
-  | NTSC || Air || 0.07168
+  | NTSC || Air || 0.1C
   |-
-  | NTSC || Water || 0.02048
+  | NTSC || Water || 0.08
   |-
-  | NTSC || Lava/acid || 0.02304
+  | NTSC || Lava/acid || 0.9
   |-
-  | PAL || Air || 0.10240
+  | PAL || Air || 0.28
   |-
-  | PAL || Water || 0.02457
+  | PAL || Water || 0.0999
   |-
-  | PAL || Lava/acid || 0.02764
+  | PAL || Lava/acid || 0.0ACC
 |}

@@ Line 3: / Line 3: @@
 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.
+Values in the table are in hexadecimal, so 0.1 is equivalent to 1/16 of a pixel
-The values can be read as "pixels.subpixels."
+"Ramp" means the number of frames the source takes to reach the amount listed in the column.
 "HGBFS" stands for "height gained before falling starts."

@@ Line 165: / Line 165: @@
 == Compared with Run Speed ==
-[[File:GalamozJumpSpeed.png|617px]]
+'''Air Physics'''
 [https://pastebin.com/GEyywzs1 Writeup from FreyasSpirit on why this chart is non-linear]
@@ Line 173: / Line 191: @@
 * [[General Movement]]
 * [[Horizontal Speed]]

@@ Line 142: / Line 142: @@
 |}
-Note shinesparks have a cap on the pixel value of 14 (in both NTSC and PAL, in any medium). The subpixel value continues to change, following some pattern that I forgot and could not quickly find.
+Note shinesparks have a cap on the pixel value of 14 (in both NTSC and PAL, in any medium). The first frame will be 7 pixels, and all remaining will be 14 pixels. The subpixel, though, continues to accelerate with a quadratic relationship with respect to the given acceleration values in region and medium above. Thus, for example, on NTSC in air, the subpixel acceleration is:  7168, 14336, 21504, 28672... This gives subpixel veloctiy values of 7168, 21504, 43008, 6144... For most RTA purposes, this is effectively random:  Some frames will move Samus 14 pixels, and some 15 pixels.
 == Compared with Run Speed ==