Offroad glitch - Revision history

Kierio04: Kierio04 moved page Offroad Glitch to Offroad glitch: Misspelled title: Title not in sentence case

2025-10-09T01:03:24Z

Kierio04 moved page Offroad Glitch to Offroad glitch: Misspelled title: Title not in sentence case

← Older revision		Revision as of 03:03, 9 October 2025
(No difference)

Boumi: small change to test discord notification

2025-02-11T21:50:12Z

small change to test discord notification

← Older revision		Revision as of 23:50, 11 February 2025
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	The '''Offroad Glitch''' is a bug that occurs with specific jump pads, which negates the following speed modifiers:		The '''Offroad Glitch''' is a bug that occurs with specific jump pads, which negates the following speed modifiers :
	* Wheelie bonus		* Wheelie bonus
	* Mini-turbo/trick/zipper boost		* Mini-turbo/trick/zipper boost

Boumi: Add page to Glitches category

2023-08-15T09:32:00Z

Add page to Glitches category

← Older revision		Revision as of 11:32, 15 August 2023
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	</pre>		</pre>
	</tabber>		</tabber>

			[[Category:Glitches]]

Ejay B: Improved clarity of first line

2023-08-09T22:23:20Z

Improved clarity of first line

← Older revision		Revision as of 00:23, 10 August 2023
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	The '''Offroad Glitch''' is a bug with specific jump pads which negates the following speed modifiers.		The '''Offroad Glitch''' is a bug that occurs with specific jump pads, which negates the following speed modifiers:
	* Wheelie bonus		* Wheelie bonus
	* Mini-turbo/trick/zipper boost		* Mini-turbo/trick/zipper boost

Vabold: Use Tabber for Gecko codes

2023-08-09T18:59:53Z

Use Tabber for Gecko codes

← Older revision		Revision as of 20:59, 9 August 2023
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	}		}
	</syntaxhighlight>The following Gecko code fixes this glitch.		</syntaxhighlight>The following Gecko code fixes this glitch.
			<tabber>
			\|-\|PAL=
	<pre>		<pre>
	Fix Offroad Glitch (PAL) [vabold]		Fix Offroad Glitch (PAL) [vabold]
Line 66:		Line 68:
	54000314 9003000C		54000314 9003000C
	60000000 00000000		60000000 00000000
			</pre>
			\|-\|NTSC-U=
			<pre>
	Fix Offroad Glitch (NTSC-U) [vabold]		Fix Offroad Glitch (NTSC-U) [vabold]
	C257BE18 00000003		C257BE18 00000003
Line 72:		Line 76:
	54000314 9003000C		54000314 9003000C
	60000000 00000000		60000000 00000000
			</pre>
			\|-\|NTSC-J=
			<pre>
	Fix Offroad Glitch (NTSC-J) [vabold]		Fix Offroad Glitch (NTSC-J) [vabold]
	C2581FFC 00000003		C2581FFC 00000003
Line 78:		Line 84:
	54000314 9003000C		54000314 9003000C
	60000000 00000000		60000000 00000000
			</pre>
			\|-\|NTSC-K=
			<pre>
	Fix Offroad Glitch (NTSC-K) [vabold]		Fix Offroad Glitch (NTSC-K) [vabold]
	C25706D4 00000003		C25706D4 00000003
Line 85:		Line 93:
	60000000 00000000		60000000 00000000
	</pre>		</pre>
			</tabber>

Vabold: C++ syntax highlighting

2023-08-09T18:54:40Z

C++ syntax highlighting

← Older revision		Revision as of 20:54, 9 August 2023
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	== Relevant code ==		== Relevant code ==
	The following code is written in C++, and has been edited to only include relevant parts. Irrelevant code will be marked with <code>// ...</code>.		The following code is written in C++, and has been edited to only include relevant parts. Irrelevant code will be marked with <code>// ...</code>.<syntaxhighlight lang="cpp" line="1">
	<~~pre~~>
	// This is run when the game recognizes we're interacting with a jump pad		// This is run when the game recognizes we're interacting with a jump pad
	void Kart::KartMove::tryStartJumpPad(int variant) {		void Kart::KartMove::tryStartJumpPad(int variant) {
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	// ...		// ...
	}		}
	</~~pre~~>		</syntaxhighlight><syntaxhighlight lang="c++" line="1">
	<~~pre~~>
	// This is run once every frame generically		// This is run once every frame generically
	void Kart::KartMove::tryEndJumpPad() {		void Kart::KartMove::tryEndJumpPad() {
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	}		}
	}		}
	</~~pre~~>		</syntaxhighlight>The following Gecko code fixes this glitch.

	The following Gecko code fixes this glitch.
	<pre>		<pre>
	Fix Offroad Glitch (PAL) [vabold]		Fix Offroad Glitch (PAL) [vabold]

Vabold: Create initial page

2023-08-09T18:08:04Z

Create initial page

New page

The '''Offroad Glitch''' is a bug with specific jump pads which negates the following speed modifiers.
* Wheelie bonus
* Mini-turbo/trick/zipper boost
* KCL flags
* Shock speed
* Crush speed

== Technical description ==
To perform the glitch, land from a variant 3 jump pad without touching a variant 4 jump pad. [[Mushroom Gorge]] is the only Nintendo track where this is possible, and can be easily activated by using the [[Mushroom]] item on the first ramp to skip the red mushroom, or by driving backwards and backing up into the ramp.

When in this state, offroad becomes indistinguishable from slippery road. Even though KCL speed is negated, KCL rotation is still accounted for, and the rotation for offroad matches the rotation for slippery road in all cases.

Mushroom Gorge uses two exclusive jump pad variants: 3 and 4. Variant 3 is assigned to the ramps, and variant 4 is assigned to the mushrooms. These variants are unique because they unconditionally negate the above speed modifiers, and their intended behavior is to restore them when touching the ground. However, the game developers mistakenly believed that variant 4 would always be activated before landing.

== Relevant code ==
The following code is written in C++, and has been edited to only include relevant parts. Irrelevant code will be marked with <code>// ...</code>.
<pre>
// This is run when the game recognizes we're interacting with a jump pad
void Kart::KartMove::tryStartJumpPad(int variant) {
// After various checks, generically set the flag for jump pads
KartState *state = mAccessor->getState();
state->bitfield0 |= FLAG_JUMP_PAD;
// ...
if (variant >= 3 && variant <= 4) {
// ...
// Set the flag for negating the speed factors
state->mFlags |= JUMP_PAD_FIXED_SPEED;
}
if (variant == 4) {
// Set the flag for mushroom-specific jump pads
state->mFlags |= JUMP_PAD_MUSHROOM_TRIGGER;
// ...
}
// ...
}
</pre>
<pre>
// This is run once every frame generically
void Kart::KartMove::tryEndJumpPad() {
KartState *state = mAccessor->getState();
// Check to see if the flag for mushroom-specific jump pads is set
if (state->mFlags & JUMP_PAD_MUSHROOM_TRIGGER) {
// If so, check to see if we just landed on the ground
if (state->mFlags & GROUND_START) {
// Unset the mushroom-specific jump pad flag
state->mFlags &= ~JUMP_PAD_MUSHROOM_TRIGGER;
// The game falsely assumes that JUMP_PAD_FIXED_SPEED can only be set if the mushroom trigger is set
// As we see above, this is not always the case, leading to the offroad glitch
// Unset the fixed speed flag here and only here
state->mFlags &= ~JUMP_PAD_FIXED_SPEED;
// ...
}
// ...
}

// Check to see if we just landed on the ground and that the mushroom-specific jump pad flag is not set
if (state->mFlags & GROUND_START !(state->mFlags & JUMP_PAD_MUSHROOM_TRIGGER)) {
// ...
// Unset the flag for jump pads
state->mFlags &= ~JUMP_PAD;
}
}
</pre>

The following Gecko code fixes this glitch.
<pre>
Fix Offroad Glitch (PAL) [vabold]
C258267C 00000003
90030004 8003000C
54000314 9003000C
60000000 00000000

Fix Offroad Glitch (NTSC-U) [vabold]
C257BE18 00000003
90030004 8003000C
54000314 9003000C
60000000 00000000

Fix Offroad Glitch (NTSC-J) [vabold]
C2581FFC 00000003
90030004 8003000C
54000314 9003000C
60000000 00000000

Fix Offroad Glitch (NTSC-K) [vabold]
C25706D4 00000003
90030004 8003000C
54000314 9003000C
60000000 00000000
</pre>