Spikes - Revision history

Lordsnek: Various links

2026-02-19T23:37:56Z

Various links

← Older revision		Revision as of 23:37, 19 February 2026
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	== Glitches ==		== Glitches ==
	there's a small discrepancy in the spike hitbox code: right-facing and down-facing spikes have a 3 pixel hitbox, while left-facing and up-facing spikes have a 2 pixel hitbox. Madeline can walljump off a wall while 3 pixels away from it, so it's possible to get close enough to walljump off the left side of a wall while avoiding left-facing spikes attached to it. This is called a spikejump. Since there is only one safe pixel to walljump off, this trick relies on Madeline's parity.		there's a small discrepancy in the spike hitbox code: right-facing and down-facing spikes have a 3 pixel hitbox, while left-facing and up-facing spikes have a 2 pixel hitbox. Madeline can walljump off a wall while 3 pixels away from it, so it's possible to get close enough to walljump off the left side of a wall while avoiding left-facing spikes attached to it. This is called a spikejump. Since there is only one safe pixel to walljump off, this trick relies on Madeline's [[parity]].


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	As a result, When there's ground under upward-facing spikes, Madeline can sometimes land on the ground while moving upward. This is known as a spike clip<ref name=":0" />. Gravity isn't applied while Madeline is standing on the ground, so she can remain in a spike clip for some time (up to 200 frames under the right conditions). If Madeline's upward speed moves her above the ground, she can perform a gracejump to gain more height than would otherwise be possible. This is known as a boost, and it can be done even when there are no spikes on top of the block.

	The same principle applies for walljumping off a wall; if Madeline reaches a wall while moving in the opposite direciton, she can do a cornerjump. This works even if there are spikes on the block she's walljumping from. Cornerjumps are similar to spikejumps in many ways, but they work on left-facing spikes, and they require Madeline to be moving away from the wall. Madeline can also cornerjump from closer to a wall than she can spikejump, since she doesn't need to avoid the spike's hitbox.		As a result, When there's ground under upward-facing spikes, Madeline can sometimes land on the ground while moving upward. This is known as a [[spike clip]]<ref name=":0" />. Gravity isn't applied while Madeline is standing on the ground, so she can remain in a spike clip for some time (up to 200 frames under the right conditions). If Madeline's upward speed moves her above the ground, she can perform a gracejump to gain more height than would otherwise be possible. This is known as a boost, and it can be done even when there are no spikes on top of the block.

			The same principle applies for walljumping off a wall; if Madeline reaches a wall while moving in the opposite direciton, she can do a cornerjump. This works even if there are spikes on the block she's walljumping from. Cornerjumps are similar to spikejumps in many ways, but they work on left-facing spikes, and they require Madeline to be moving away from the wall. Madeline can also [[cornerjump]] from closer to a wall than she can spikejump, since she doesn't need to avoid the spike's hitbox.

	Although spikes are almost always placed next to a block in Celeste Classic, there are a few situations where they aren't. IN these situations, Madeline can pass through the spikes by being on one side of the spikes on one frame, then the other side on the next frame. COnfusingly, this is also sometimes called a spike clip, despite having little in common with the other type of spike clip. TO disambiguate, this type of spike clip is varyingly called a "2500 clip" (after the only level in the original game where this is possible) or a [direction]-facing spike clip. Due to upward-facing spikes being only 2 pixels tall, it's possible to fall through them with the right spacing even without using a dash. Similarly, left-facing spike clips are easier than right-facing ones, and they can even be done with a walljump and good spacing.		Although spikes are almost always placed next to a block in Celeste Classic, there are a few situations where they aren't. IN these situations, Madeline can pass through the spikes by being on one side of the spikes on one frame, then the other side on the next frame. COnfusingly, this is also sometimes called a spike clip, despite having little in common with the other type of spike clip. TO disambiguate, this type of spike clip is varyingly called a "2500 clip" (after the only level in the original game where this is possible) or a [direction]-facing spike clip. Due to upward-facing spikes being only 2 pixels tall, it's possible to fall through them with the right spacing even without using a dash. Similarly, left-facing spike clips are easier than right-facing ones, and they can even be done with a walljump and good spacing.

Lordsnek: Added a lot to the glitches section. I don't really like my writing style here, and I think there need to be embedded gifs/images. Also, I didn't have time to link to like anything, hopefully I can get to that later

2026-02-19T19:01:01Z

Added a lot to the glitches section. I don't really like my writing style here, and I think there need to be embedded gifs/images. Also, I didn't have time to link to like anything, hopefully I can get to that later

← Older revision		Revision as of 19:01, 19 February 2026
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	== Glitches ==		== Glitches ==
	~~Spikes~~ don't kill the player if she's moving the direction they face<ref name=":0">https://celesteclassic.github.io/glossary/</ref>~~. This means~~ Madeline can move into a spike from behind it without dying. In addition to making it possible to fall through spikes, this also lets Madeline interact with a block that would otherwise be inaccessible due to a spike near it.		there's a small discrepancy in the spike hitbox code: right-facing and down-facing spikes have a 3 pixel hitbox, while left-facing and up-facing spikes have a 2 pixel hitbox. Madeline can walljump off a wall while 3 pixels away from it, so it's possible to get close enough to walljump off the left side of a wall while avoiding left-facing spikes attached to it. This is called a spikejump. Since there is only one safe pixel to walljump off, this trick relies on Madeline's parity.


			Since spikes don't kill the player if she's moving the direction they face<ref name=":0">https://celesteclassic.github.io/glossary/</ref>, Madeline can move into a spike from behind it without dying. In addition to making it possible to fall through spikes, this also lets Madeline interact with a block that would otherwise be inaccessible due to a spike near it.


			As a result, When there's ground under upward-facing spikes, Madeline can sometimes land on the ground while moving upward. This is known as a spike clip<ref name=":0" />. Gravity isn't applied while Madeline is standing on the ground, so she can remain in a spike clip for some time (up to 200 frames under the right conditions). If Madeline's upward speed moves her above the ground, she can perform a gracejump to gain more height than would otherwise be possible. This is known as a boost, and it can be done even when there are no spikes on top of the block.

			The same principle applies for walljumping off a wall; if Madeline reaches a wall while moving in the opposite direciton, she can do a cornerjump. This works even if there are spikes on the block she's walljumping from. Cornerjumps are similar to spikejumps in many ways, but they work on left-facing spikes, and they require Madeline to be moving away from the wall. Madeline can also cornerjump from closer to a wall than she can spikejump, since she doesn't need to avoid the spike's hitbox.

			Although spikes are almost always placed next to a block in Celeste Classic, there are a few situations where they aren't. IN these situations, Madeline can pass through the spikes by being on one side of the spikes on one frame, then the other side on the next frame. COnfusingly, this is also sometimes called a spike clip, despite having little in common with the other type of spike clip. TO disambiguate, this type of spike clip is varyingly called a "2500 clip" (after the only level in the original game where this is possible) or a [direction]-facing spike clip. Due to upward-facing spikes being only 2 pixels tall, it's possible to fall through them with the right spacing even without using a dash. Similarly, left-facing spike clips are easier than right-facing ones, and they can even be done with a walljump and good spacing.




	When there is ground under upward-facing spikes, Madeline can sometimes land on the ground while moving upward. Gravity isn't applied while Madeline is standing on the ground, so she can often stand on the ground for a long time. This is known as a spike clip<ref name=":0" />. If Madeline's upward speed moves her above the ground, she can perform a gracejump to gain more height than would otherwise be possible. This is known as a boost, and it can also be done if there are no spikes on top of the block.
	[[Category: Mechanics]]		[[Category: Mechanics]]
	[[Category: Stub]]		[[Category: Stub]]

Lordsnek: Don't have time to finish, started glitches section but it's really bad rn

2026-02-19T16:45:20Z

Don't have time to finish, started glitches section but it's really bad rn

← Older revision		Revision as of 16:45, 19 February 2026
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	Spikes are obstacles in Celeste Classic that can kill Madeline when she touches them. Spikes are one of two ways the player can die in the base game, along with the bottom of the screen. There are four types of spikes that point in each of the cardinal directions. Spikes are typically placed next to a block so that their prongs face outward.		Spikes are obstacles in [[Celeste Classic]] that can kill [[Madeline]] when she touches them. Spikes are one of two ways the player can die in the base game, along with the bottom of the screen. There are four types of spikes that point in each of the cardinal directions. Spikes are typically placed next to a block so that their prongs face outward.

	== Original Code ==		== Original Code ==
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	end		end
	</pre>		</pre>

			== Glitches ==
			Spikes don't kill the player if she's moving the direction they face<ref name=":0">https://celesteclassic.github.io/glossary/</ref>. This means Madeline can move into a spike from behind it without dying. In addition to making it possible to fall through spikes, this also lets Madeline interact with a block that would otherwise be inaccessible due to a spike near it.


			When there is ground under upward-facing spikes, Madeline can sometimes land on the ground while moving upward. Gravity isn't applied while Madeline is standing on the ground, so she can often stand on the ground for a long time. This is known as a spike clip<ref name=":0" />. If Madeline's upward speed moves her above the ground, she can perform a gracejump to gain more height than would otherwise be possible. This is known as a boost, and it can also be done if there are no spikes on top of the block.
	[[Category: Mechanics]]		[[Category: Mechanics]]
	[[Category: Stub]]		[[Category: Stub]]

Lordsnek: Added basic summary, original code segment

2026-02-19T16:22:44Z

Added basic summary, original code segment

New page

Spikes are obstacles in Celeste Classic that can kill Madeline when she touches them. Spikes are one of two ways the player can die in the base game, along with the bottom of the screen. There are four types of spikes that point in each of the cardinal directions. Spikes are typically placed next to a block so that their prongs face outward.

== Original Code ==
<pre>
function spikes_at(x,y,w,h,xspd,yspd)
for i=max(0,flr(x/8)),min(15,(x+w-1)/8) do
for j=max(0,flr(y/8)),min(15,(y+h-1)/8) do
local tile=tile_at(i,j)
if tile==17 and ((y+h-1)%8>=6 or y+h==j*8+8) and yspd>=0 then
return true
elseif tile==27 and y%8<=2 and yspd<=0 then
return true
elseif tile==43 and x%8<=2 and xspd<=0 then
return true
elseif tile==59 and ((x+w-1)%8>=6 or x+w==i*8+8) and xspd>=0 then
return true
end
end
end
return false
end
</pre>
[[Category: Mechanics]]
[[Category: Stub]]