Glitchy Ledge Grab - Revision history

Dm ss at 04:21, 29 December 2024

2024-12-29T04:21:07Z

← Older revision		Revision as of 04:21, 29 December 2024
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	A GLG can be triggered in a few ways:		A GLG can be triggered in a few ways:
	* The wall is slightly tilted away away from Mario on the vertical axis, so the lower point (30 units above Mario) is ~~within range of it~~ but ~~not his~~ upper point (150 units above Mario)~~, which~~ triggers a ledge grab check when there is not ~~supposed~~ to be one. This is used in the [[A Button Challenge]] to enter [[The Secret Aquarium]] with 0 A-button presses.<ref>https://www.youtube.com/watch?v=7YhJcF9v7QQ</ref>		* The wall is slightly tilted away away from Mario on the vertical axis, so the lower point (30 units above Mario) is inside the wall, but the upper point (150 units above Mario) is not. This triggers a ledge grab check when there is not intended to be one. This is used in the [[A Button Challenge]] to enter [[The Secret Aquarium]] with 0 A-button presses.<ref>https://www.youtube.com/watch?v=7YhJcF9v7QQ</ref>
	* Mario correctly triggers a ledge grab on a wall he is not completely below, but it detects an unintended floor. This can happen near the edges of non-axis-aligned walls, because the logic for a [[Ledge Grab]] uses a point starting from Mario, but in the direction perpendicular to the wall Mario is inside. This perpendicular line can extend past the wall Mario is inside, and end up inside an unintended floor. This is used in the [[A Button Challenge]] to enter [[Bowser in the Sky]] in 0 A-button presses.<ref>https://www.youtube.com/watch?v=Ii2rvLDd09I&t=1069s</ref><ref>https://www.youtube.com/watch?v=VkfRQ0_vu40</ref>		* Mario correctly triggers a ledge grab on a wall he is not completely below, but it detects an unintended floor. This can happen near the edges of non-axis-aligned walls, because the logic for a [[Ledge Grab]] uses a point starting from Mario, but in the direction perpendicular to the wall Mario is inside. This perpendicular line can extend past the wall Mario is inside, and end up inside an unintended floor. This is used in the [[A Button Challenge]] to enter [[Bowser in the Sky]] in 0 A-button presses.<ref>https://www.youtube.com/watch?v=Ii2rvLDd09I&t=1069s</ref><ref>https://www.youtube.com/watch?v=VkfRQ0_vu40</ref>
	* Mario's lower point is near a wall, and his upper point is aligned exactly with a gap in the wall due to float imprecision. <ref>https://www.youtube.com/watch?v=j5VSzpl-Xdg</ref>		* Mario's lower point is near a wall, and his upper point is aligned exactly with a gap in the wall due to float imprecision. <ref>https://www.youtube.com/watch?v=j5VSzpl-Xdg</ref>

Dm ss at 04:19, 29 December 2024

2024-12-29T04:19:26Z

← Older revision		Revision as of 04:19, 29 December 2024
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	{{stub}}		{{stub}}
	[[File:GLG.gif\|thumb\|GLG at [[The Secret Aquarium\|SA]] Entrance]]		[[File:GLG.gif\|thumb\|GLG at [[The Secret Aquarium\|SA]] Entrance]]
	A '''glitchy ledge grab''' or '''GLG''' is a kind of [[Ledge Grab\|ledge grab]] that goes higher than a normal ledge grab. While a regular ledge grab can only allow Mario to ascend up to 150 units, a glitchy ledge grab allows Mario to ascend up to 238 units. This can allow Mario to reach areas he could not normally~~, particularly~~ in the context of challenges such as the [[A Button Challenge]].		A '''glitchy ledge grab''' or '''GLG''' is a kind of [[Ledge Grab\|ledge grab]] that goes higher than a normal ledge grab. While a regular ledge grab can only allow Mario to ascend up to 150 units, a glitchy ledge grab allows Mario to ascend up to 238 units. This can allow Mario to reach areas he could not normally in the context of challenges such as the [[A Button Challenge]].
	==Details==		==Details==
	~~If Mario is moving in the air with non-positive vertical speed,~~ the ~~game checks whether Mario can grab a ledge with two~~ conditions~~. First, the game checks a 50 unit radius around~~ Mario~~'s position~~ to ~~see if there is~~ a ~~wall 30 units above Mario's position and no wall 150 units above Mario's position. Then~~, the game ~~checks if there is~~ a ~~ledge Mario can~~ grab ~~on by looking at his x and z coordinates before being displaced~~ by ~~the wall and his y coordinate plus 160 units, looking~~ for ~~the highest~~ floor ~~below those coordinates, and checking whether that floor is~~ at ~~least 100~~ units above Mario. <ref>https://github.com/n64decomp/sm64/blob/master/src/game/mario_step.c</ref>~~. Additionally~~, ~~when~~ the ~~game~~ looks for a floor, ~~it includes a~~ 78 ~~unit buffer giving~~ the floor search ~~an effective~~ height of ~~238 units~~. A glitchy ledge grab ~~occurs when those two conditions are satisfied in unusual ways~~, so Mario ~~is able to~~ grab a ledge ~~he normally wouldn't be able to~~. A GLG can be triggered in a few ways:		When the conditions required for Mario to perform a [[Ledge Grab]] are met, the game searches for a potential floor to grab onto by searching downwards for a floor hitbox starting at 160 units above Mario's vertical position.<ref>https://github.com/n64decomp/sm64/blob/master/src/game/mario_step.c</ref> Importantly, the search looks for any part of a floor hitbox, not only the top of one. Under normal conditions, the top of the floor hitbox will always be below the 160 unit search height, otherwise the required condition of there being no wall 150 units above Mario would not be met. Floor hitboxes are 78 units tall. This means that if the floor search, starting at a relative height of 160 were to somehow encounter the middle or bottom of a floor hitbox, Mario would ledge grab the found floor, despite the top of that floor being above the 160 height search start. This is a glitchy ledge grab. If the search starting at an offset of 160 units encounters the bottom-most portion of a floor, then Mario would grab the ledge at an offset of 160 + 78 units, creating a maximum attainable ledge grab height of 238 units.
	* The wall is slightly tilted, so ~~Mario's~~ lower point is within range of it but not his upper point, which triggers a ledge grab check when there is not supposed to be one (used in the [[A Button Challenge]] to enter [[The Secret Aquarium]] ~~0xA)~~ <ref>https://www.youtube.com/watch?v=7YhJcF9v7QQ</ref>
	* Mario~~'s lower point is near~~ a wall, but it detects the ~~wrong floor~~ because of a ~~difference~~ in the ~~orientation of~~ the wall ~~hitbox and~~ the ~~direction the game uses to find the x~~,~~z position the~~ floor is ~~searched in (~~used in the [[A Button Challenge]] to ~~go to~~ [[Bowser in the Sky]] ~~0xA)~~ <ref>https://www.youtube.com/watch?v=Ii2rvLDd09I&t=1069s</ref>		A GLG can be triggered in a few ways:
	* Mario's lower point touches a wall that ends as intended, but it detects the wrong floor because the floor search starts 238 units above Mario, which is high enough to find an unintended floor.		* The wall is slightly tilted away away from Mario on the vertical axis, so the lower point (30 units above Mario) is within range of it but not his upper point (150 units above Mario), which triggers a ledge grab check when there is not supposed to be one. This is used in the [[A Button Challenge]] to enter [[The Secret Aquarium]] with 0 A-button presses.<ref>https://www.youtube.com/watch?v=7YhJcF9v7QQ</ref>
			* Mario correctly triggers a ledge grab on a wall he is not completely below, but it detects an unintended floor. This can happen near the edges of non-axis-aligned walls, because the logic for a [[Ledge Grab]] uses a point starting from Mario, but in the direction perpendicular to the wall Mario is inside. This perpendicular line can extend past the wall Mario is inside, and end up inside an unintended floor. This is used in the [[A Button Challenge]] to enter [[Bowser in the Sky]] in 0 A-button presses.<ref>https://www.youtube.com/watch?v=Ii2rvLDd09I&t=1069s</ref><ref>https://www.youtube.com/watch?v=VkfRQ0_vu40</ref>
	* Mario's lower point is near a wall, and his upper point is aligned exactly with a gap in the wall due to float imprecision. <ref>https://www.youtube.com/watch?v=j5VSzpl-Xdg</ref>		* Mario's lower point is near a wall, and his upper point is aligned exactly with a gap in the wall due to float imprecision. <ref>https://www.youtube.com/watch?v=j5VSzpl-Xdg</ref>

Macrepeh: Rewrite

2022-12-04T20:53:10Z

Rewrite

← Older revision		Revision as of 20:53, 4 December 2022
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	{{stub}}		{{stub}}
	[[File:GLG.gif\|thumb\|GLG at [[The Secret Aquarium\|SA]] Entrance]]		[[File:GLG.gif\|thumb\|GLG at [[The Secret Aquarium\|SA]] Entrance]]
	A '''glitchy ledge grab''' or '''GLG''' is a kind of [[Ledge Grab\|ledge grab]] that goes higher than a normal ledge grab.		A '''glitchy ledge grab''' or '''GLG''' is a kind of [[Ledge Grab\|ledge grab]] that goes higher than a normal ledge grab. While a regular ledge grab can only allow Mario to ascend up to 150 units, a glitchy ledge grab allows Mario to ascend up to 238 units. This can allow Mario to reach areas he could not normally, particularly in the context of challenges such as the [[A Button Challenge]].
	==Details==		==Details==
	~~A GLG~~ can ~~ascend slightly more than 238 [[~~unit]]s ~~up, compared~~ to ~~only~~ 150 units ~~from a regular ledge grab~~.		If Mario is moving in the air with non-positive vertical speed, the game checks whether Mario can grab a ledge with two conditions. First, the game checks a 50 unit radius around Mario's position to see if there is a wall 30 units above Mario's position and no wall 150 units above Mario's position. Then, the game checks if there is a ledge Mario can grab on by looking at his x and z coordinates before being displaced by the wall and his y coordinate plus 160 units, looking for the highest floor below those coordinates, and checking whether that floor is at least 100 units above Mario. <ref>https://github.com/n64decomp/sm64/blob/master/src/game/mario_step.c</ref>. Additionally, when the game looks for a floor, it includes a 78 unit buffer giving the floor search an effective height of 238 units. A glitchy ledge grab occurs when those two conditions are satisfied in unusual ways, so Mario is able to grab a ledge he normally wouldn't be able to. A GLG can be triggered in a few ways:
			* The wall is slightly tilted, so Mario's lower point is within range of it but not his upper point, which triggers a ledge grab check when there is not supposed to be one (used in the [[A Button Challenge]] to enter [[The Secret Aquarium]] 0xA) <ref>https://www.youtube.com/watch?v=7YhJcF9v7QQ</ref>
	~~The~~ game ~~does two~~ ledge grab ~~checks~~, ~~one~~ at Mario~~'s lower body and one at his upper body~~<ref>https://~~discordapp~~.com/~~channels~~/~~267091686423789568~~/~~309838966125756416~~/~~495070903177314305~~</ref>. ~~When Mario's lower body touches a [[wall]] and not his upper body~~, the game looks for a floor ~~to grab onto. This happens when~~ it ~~is within 50 units from his feet, but more than 50 units from his head. Alternatively, 30 units up there is~~ a ~~wall but 150~~ units ~~up there is not one, this time measuring from Mario's feet~~. A glitchy ledge grab is when those two ~~things don't line up quite right~~, so Mario is able to grab a ledge he normally wouldn't be able to. A GLG can be triggered ~~because~~:		* Mario's lower point is near a wall, but it detects the wrong floor because of a difference in the orientation of the wall hitbox and the direction the game uses to find the x,z position the floor is searched in (used in the [[A Button Challenge]] to go to [[Bowser in the Sky]] 0xA) <ref>https://www.youtube.com/watch?v=Ii2rvLDd09I&t=1069s</ref>
	* The wall is slightly tilted, so Mario's lower ~~body touches~~ it but not his upper ~~body~~, which triggers a ledge grab check when there ~~isn't~~ supposed to be one (used in the [[A Button Challenge]] to enter [[The Secret Aquarium]] 0xA)		* Mario's lower point touches a wall that ends as intended, but it detects the wrong floor because the floor search starts 238 units above Mario, which is high enough to find an unintended floor.
	* Mario's lower ~~body touches~~ a wall, but it detects the wrong floor because of the direction ~~it searches~~ in (used in the [[A Button Challenge]] to go to [[Bowser in the Sky]] 0xA)		* Mario's lower point is near a wall, and his upper point is aligned exactly with a gap in the wall due to float imprecision. <ref>https://www.youtube.com/watch?v=j5VSzpl-Xdg</ref>
	* Mario's lower ~~body~~ touches a wall, but it detects the wrong floor because the floor search starts 238 units above Mario, which is ~~too~~ high

	==References==		==References==

Galoomba: /* Details */

2022-06-13T11:11:55Z

Details

← Older revision		Revision as of 11:11, 13 June 2022
Line 3:		Line 3:
	A '''glitchy ledge grab''' or '''GLG''' is a kind of [[Ledge Grab\|ledge grab]] that goes higher than a normal ledge grab.		A '''glitchy ledge grab''' or '''GLG''' is a kind of [[Ledge Grab\|ledge grab]] that goes higher than a normal ledge grab.
	==Details==		==Details==
	A GLG can ascend slightly more than 238 [[unit]]s up, compared to only 150 units from a regular ledge grab. The game does two ledge grab checks, one at Mario's lower body and one at his upper body<ref>https://discordapp.com/channels/267091686423789568/309838966125756416/495070903177314305</ref>. When Mario's lower body touches a [[wall]] and not his upper body, the game looks for a floor to grab onto. This happens when it is within 50 units from his feet, but more than 50 units from his head. Alternatively, 30 units up there is a wall but 150 units up there is not one, this time measuring from Mario's feet. A glitchy ledge grab is when those two things don't line up quite right, so Mario is able to grab a ledge he normally wouldn't be able to. A GLG can be triggered because:		A GLG can ascend slightly more than 238 [[unit]]s up, compared to only 150 units from a regular ledge grab.

			The game does two ledge grab checks, one at Mario's lower body and one at his upper body<ref>https://discordapp.com/channels/267091686423789568/309838966125756416/495070903177314305</ref>. When Mario's lower body touches a [[wall]] and not his upper body, the game looks for a floor to grab onto. This happens when it is within 50 units from his feet, but more than 50 units from his head. Alternatively, 30 units up there is a wall but 150 units up there is not one, this time measuring from Mario's feet. A glitchy ledge grab is when those two things don't line up quite right, so Mario is able to grab a ledge he normally wouldn't be able to. A GLG can be triggered because:
	* The wall is slightly tilted, so Mario's lower body touches it but not his upper body, which triggers a ledge grab check when there isn't supposed to be one (used in the [[A Button Challenge]] to enter [[The Secret Aquarium]] 0xA)		* The wall is slightly tilted, so Mario's lower body touches it but not his upper body, which triggers a ledge grab check when there isn't supposed to be one (used in the [[A Button Challenge]] to enter [[The Secret Aquarium]] 0xA)
	* Mario's lower body touches a wall, but it detects the wrong floor because of the direction it searches in (used in the [[A Button Challenge]] to go to [[Bowser in the Sky]] 0xA)		* Mario's lower body touches a wall, but it detects the wrong floor because of the direction it searches in (used in the [[A Button Challenge]] to go to [[Bowser in the Sky]] 0xA)
	* Mario's lower body touches a wall, but it detects the wrong floor because the floor search starts 238 units above Mario, which is too high		* Mario's lower body touches a wall, but it detects the wrong floor because the floor search starts 238 units above Mario, which is too high

	==References==		==References==
	<references />		<references />

MMMMMMMMMMMMM: MMMMMMMMMMMMM moved page Glitchy ledge grab to Glitchy Ledge Grab over redirect: actually, Ledge Grab is an action

2021-05-11T01:44:01Z

MMMMMMMMMMMMM moved page Glitchy ledge grab to Glitchy Ledge Grab over redirect: actually, Ledge Grab is an action

← Older revision	Revision as of 01:44, 11 May 2021
(No difference)

MMMMMMMMMMMMM: MMMMMMMMMMMMM moved page Glitchy Ledge Grab to Glitchy ledge grab: Sentence casify the wiki

2021-05-11T01:35:34Z

MMMMMMMMMMMMM moved page Glitchy Ledge Grab to Glitchy ledge grab: Sentence casify the wiki

← Older revision

Revision as of 01:35, 11 May 2021

JoshDuMan: This page needs some TLC

2019-06-30T06:41:48Z

This page needs some TLC

← Older revision		Revision as of 06:41, 30 June 2019
Line 3:		Line 3:
	A '''glitchy ledge grab''' or '''GLG''' is a kind of [[Ledge Grab\|ledge grab]] that goes higher than a normal ledge grab.		A '''glitchy ledge grab''' or '''GLG''' is a kind of [[Ledge Grab\|ledge grab]] that goes higher than a normal ledge grab.
	==Details==		==Details==
	A GLG can ascend ~~229~~ [[unit]]s up, compared to only 150 units from a regular ledge grab. The game does two ledge grab checks, one at Mario's lower body and one at his upper body<ref>https://discordapp.com/channels/267091686423789568/309838966125756416/495070903177314305</ref>. When Mario's lower body touches a [[wall]] and not his upper body, the game looks for a floor to grab onto.This happens when it is within 50 units from his feet, but more than 50 units from his head. Alternatively, 30 units up there is a wall but 150 units up there is not one, this time measuring from Mario's feet. A glitchy ledge grab is when those two things don't line up quite right, so Mario is able to grab a ledge he normally wouldn't be able to. A GLG can be triggered because:		A GLG can ascend slightly more than 238 [[unit]]s up, compared to only 150 units from a regular ledge grab. The game does two ledge grab checks, one at Mario's lower body and one at his upper body<ref>https://discordapp.com/channels/267091686423789568/309838966125756416/495070903177314305</ref>. When Mario's lower body touches a [[wall]] and not his upper body, the game looks for a floor to grab onto. This happens when it is within 50 units from his feet, but more than 50 units from his head. Alternatively, 30 units up there is a wall but 150 units up there is not one, this time measuring from Mario's feet. A glitchy ledge grab is when those two things don't line up quite right, so Mario is able to grab a ledge he normally wouldn't be able to. A GLG can be triggered because:
	* The wall is slightly tilted, so Mario's lower body touches it but not his upper body, which triggers a ledge grab check when there isn't supposed to be one (used in the [[A Button Challenge]] to enter [[The Secret Aquarium]] 0xA)		* The wall is slightly tilted, so Mario's lower body touches it but not his upper body, which triggers a ledge grab check when there isn't supposed to be one (used in the [[A Button Challenge]] to enter [[The Secret Aquarium]] 0xA)
	* Mario's lower body touches a wall, but it detects the wrong floor because of the direction it searches in (used in the [[A Button Challenge]] to go to [[Bowser in the Sky]] 0xA)		* Mario's lower body touches a wall, but it detects the wrong floor because of the direction it searches in (used in the [[A Button Challenge]] to go to [[Bowser in the Sky]] 0xA)

ChouxZi3: added glitch nav

2019-04-23T10:41:54Z

added glitch nav

← Older revision		Revision as of 10:41, 23 April 2019
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	<references />		<references />
	[[Category:Glitches]]		[[Category:Glitches]]

			{{Glitches}}

ChouxZi3: shell mario is next

2019-03-14T14:17:01Z

shell mario is next

← Older revision		Revision as of 14:17, 14 March 2019
Line 1:		Line 1:
	{{stub}}		{{stub}}
			[[File:GLG.gif\|thumb\|GLG at [[The Secret Aquarium\|SA]] Entrance]]
	A '''glitchy ledge grab''' or '''GLG''' is a kind of [[Ledge Grab\|ledge grab]] that goes higher than a normal ledge grab.		A '''glitchy ledge grab''' or '''GLG''' is a kind of [[Ledge Grab\|ledge grab]] that goes higher than a normal ledge grab.
	==Details==		==Details==

MMMMMMMMMMMMM: migrate doc

2018-10-26T12:23:36Z

migrate doc

← Older revision		Revision as of 12:23, 26 October 2018
Line 2:		Line 2:
	A '''glitchy ledge grab''' or '''GLG''' is a kind of [[Ledge Grab\|ledge grab]] that goes higher than a normal ledge grab.		A '''glitchy ledge grab''' or '''GLG''' is a kind of [[Ledge Grab\|ledge grab]] that goes higher than a normal ledge grab.
	==Details==		==Details==
	A GLG can ascend 229 [[unit]]s up, compared to only 150 units from a regular ledge grab. The game does two ledge grab checks, one at Mario's lower body and one at his upper body<ref>https://discordapp.com/channels/267091686423789568/309838966125756416/495070903177314305</ref>. When Mario's lower body touches a [[wall]] and not his upper body, the game looks for a floor to grab onto. A glitchy ledge grab is when those two things don't line up quite right, so Mario is able to grab a ledge he normally wouldn't be able to. A GLG can be triggered because:		A GLG can ascend 229 [[unit]]s up, compared to only 150 units from a regular ledge grab. The game does two ledge grab checks, one at Mario's lower body and one at his upper body<ref>https://discordapp.com/channels/267091686423789568/309838966125756416/495070903177314305</ref>. When Mario's lower body touches a [[wall]] and not his upper body, the game looks for a floor to grab onto.This happens when it is within 50 units from his feet, but more than 50 units from his head. Alternatively, 30 units up there is a wall but 150 units up there is not one, this time measuring from Mario's feet. A glitchy ledge grab is when those two things don't line up quite right, so Mario is able to grab a ledge he normally wouldn't be able to. A GLG can be triggered because:
	* The wall is slightly tilted, so Mario's lower body touches it but not his upper body, which triggers a ledge grab check when there isn't supposed to be one (used in the [[A Button Challenge]] to enter [[The Secret Aquarium]] 0xA)		* The wall is slightly tilted, so Mario's lower body touches it but not his upper body, which triggers a ledge grab check when there isn't supposed to be one (used in the [[A Button Challenge]] to enter [[The Secret Aquarium]] 0xA)
	* Mario's lower body touches a wall, but it detects the wrong floor because of the direction it searches in (used in the [[A Button Challenge]] to go to [[Bowser in the Sky]] 0xA)		* Mario's lower body touches a wall, but it detects the wrong floor because of the direction it searches in (used in the [[A Button Challenge]] to go to [[Bowser in the Sky]] 0xA)