Barrel roll: Difference between revisions

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== Overview ==

Barrel roll is activated by colliding with '''barrel roll walls''' (also known as '''soft walls'''). On the regular tracks, soft walls are found at any accessible road edge to prevent vehicles from getting stuck on ~~the edge~~. Barrel roll can only be active when

Barrel roll is activated by colliding with '''barrel roll walls''' (also known as '''soft walls'''). On the regular tracks, soft walls are found at any accessible road edge to prevent vehicles from getting stuck on edges. Barrel roll can only be active when

# the magnitude of vehicle [[Internal velocity|IV]] is below 15 u/f,

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==== Driving on solid OOB ====

Wheelchair enables vehicles to drive around on [[Collision types|solid out of bounds (OOB)]], as OOB detection on this collision checks that your wheels are on or very near to the ground. Wheelchair with Tiny Titan/Classic Dragster has been used in [[Koopa Cape#Unrestricted Flap|Koopa Cape UR Flap]], [[DS Desert Hills#Unrestricted Flap|DS Desert Hills UR Flap]], and [[DS Peach Gardens#Unrestricted Flap|DS Peach Gardens UR Flap]] to navigate around checkpoints while driving on solid OOB. Wheelchair with Dolphin Dasher is part of the theorized optimal strategy for ~~[[DS Peach Gardens#Unrestricted Flap|~~DS Peach Gardens UR Flap]] for the same reason.

Wheelchair enables vehicles to drive around on [[Collision types|solid out of bounds (OOB)]], as OOB detection on this collision checks that your wheels are on or very near to the ground. Wheelchair with Tiny Titan/Classic Dragster has been used in [[Koopa Cape#Unrestricted Flap|Koopa Cape UR Flap]], [[DS Desert Hills#Unrestricted Flap|DS Desert Hills UR Flap]], and [[DS Peach Gardens#Unrestricted Flap|DS Peach Gardens UR Flap]] to navigate around checkpoints while driving on solid OOB. Wheelchair with Dolphin Dasher is part of the theorized optimal strategy for DS Peach Gardens UR Flap for the same reason.

==== Speed redirection ====

While IV is limited in wheelchair, vehicles can gain EV from slopes because the body hitboxes do not have traction with the ground. Separately, when a vehicle flips out of wheelchair, its direction of movement will flip along with it. These two factors together allow a vehicle to redirect instantaneously from moving quickly backwards to moving quickly forwards. This is the optimal strategy for [[DS Yoshi Falls#No Ultra Flap|DS Yoshi Falls NU Flap]] to enter the finish line backwards from the front (after a DLC) and then immediately start traveling forwards.

While IV is limited in wheelchair, vehicles can gain [[External velocity|EV]] from slopes because the body hitboxes do not have traction with the ground. Separately, when a vehicle flips out of wheelchair, its direction of movement will flip along with it. These two factors together allow a vehicle to redirect instantaneously from moving quickly backwards to moving quickly forwards. This is the optimal strategy for [[DS Yoshi Falls#No Ultra Flap|DS Yoshi Falls NU Flap]] to enter the finish line backwards from the front (after a DLC) and then immediately start traveling forwards.

=== Horizontal OOB bypass ===

Horizontal OOB planes count a vehicle out if it travels through the plane in a certain direction. Passing through a horizontal OOB plane while upside down (achievable with barrel roll) allows the player to bypass it without getting counted out. This is used on ~~[[Rainbow Road#Unrestricted Flap|~~Rainbow Road UR Flap]] to complete the full DLC shroomless.

Horizontal OOB planes count a vehicle out if it travels through the plane in a certain direction. Passing through a horizontal OOB plane while upside down (achievable with barrel roll) allows the player to bypass it without getting counted out. This is used on Rainbow Road UR Flap to complete the full DLC shroomless.

=== Extended HWG ===

Colliding with a barrel roll wall sets the "HWG timer" to 10 frames, during which barrel roll can be activated. This timer is so-named because it is also responsible for activating [[horizontal wall glitch]] (HWG). HWG usually lasts for 20 frames, but in certain cases, HWG will continue so long as the timer does not count down to 0. This can be exploited by ~~continually~~ riding a barrel roll wall so that the HWG timer continually resets to 10, thus extending the initial HWG. This is used on [[N64 DK's Jungle Parkway#Unrestricted Flap|N64 DK's Jungle Parkway UR Flap]] to reach the seam to the left of the finish line.

Colliding with a barrel roll wall sets the "HWG timer" to 10 frames, during which barrel roll can be activated. This timer is so-named because it is also responsible for activating [[horizontal wall glitch]] (HWG). HWG usually lasts for 20 frames, but in certain cases, HWG will continue so long as the timer does not count down to 0. This can be exploited by riding a barrel roll wall so that the HWG timer continually resets to 10, thus extending the initial HWG. This is used on [[N64 DK's Jungle Parkway#Unrestricted Flap|N64 DK's Jungle Parkway UR Flap]] to reach the seam to the left of the finish line.

@@ Line 2: / Line 2: @@
 == Overview ==
-Barrel roll is activated by colliding with '''barrel roll walls''' (also known as '''soft walls'''). On the regular tracks, soft walls are found at any accessible road edge to prevent vehicles from getting stuck on the edge. Barrel roll can only be active when
+Barrel roll is activated by colliding with '''barrel roll walls''' (also known as '''soft walls'''). On the regular tracks, soft walls are found at any accessible road edge to prevent vehicles from getting stuck on edges. Barrel roll can only be active when
 # the magnitude of vehicle [[Internal velocity|IV]] is below 15 u/f,
@@ Line 21: / Line 21: @@
 ==== Driving on solid OOB ====
-Wheelchair enables vehicles to drive around on [[Collision types|solid out of bounds (OOB)]], as OOB detection on this collision checks that your wheels are on or very near to the ground. Wheelchair with Tiny Titan/Classic Dragster has been used in [[Koopa Cape#Unrestricted Flap|Koopa Cape UR Flap]], [[DS Desert Hills#Unrestricted Flap|DS Desert Hills UR Flap]], and [[DS Peach Gardens#Unrestricted Flap|DS Peach Gardens UR Flap]] to navigate around checkpoints while driving on solid OOB. Wheelchair with Dolphin Dasher is part of the theorized optimal strategy for [[DS Peach Gardens#Unrestricted Flap|DS Peach Gardens UR Flap]] for the same reason.
+Wheelchair enables vehicles to drive around on [[Collision types|solid out of bounds (OOB)]], as OOB detection on this collision checks that your wheels are on or very near to the ground. Wheelchair with Tiny Titan/Classic Dragster has been used in [[Koopa Cape#Unrestricted Flap|Koopa Cape UR Flap]], [[DS Desert Hills#Unrestricted Flap|DS Desert Hills UR Flap]], and [[DS Peach Gardens#Unrestricted Flap|DS Peach Gardens UR Flap]] to navigate around checkpoints while driving on solid OOB. Wheelchair with Dolphin Dasher is part of the theorized optimal strategy for DS Peach Gardens UR Flap for the same reason.
 ==== Speed redirection ====
-While IV is limited in wheelchair, vehicles can gain EV from slopes because the body hitboxes do not have traction with the ground. Separately, when a vehicle flips out of wheelchair, its direction of movement will flip along with it. These two factors together allow a vehicle to redirect instantaneously from moving quickly backwards to moving quickly forwards. This is the optimal strategy for [[DS Yoshi Falls#No Ultra Flap|DS Yoshi Falls NU Flap]] to enter the finish line backwards from the front (after a DLC) and then immediately start traveling forwards.
+While IV is limited in wheelchair, vehicles can gain [[External velocity|EV]] from slopes because the body hitboxes do not have traction with the ground. Separately, when a vehicle flips out of wheelchair, its direction of movement will flip along with it. These two factors together allow a vehicle to redirect instantaneously from moving quickly backwards to moving quickly forwards. This is the optimal strategy for [[DS Yoshi Falls#No Ultra Flap|DS Yoshi Falls NU Flap]] to enter the finish line backwards from the front (after a DLC) and then immediately start traveling forwards.
 === Horizontal OOB bypass ===
-Horizontal OOB planes count a vehicle out if it travels through the plane in a certain direction. Passing through a horizontal OOB plane while upside down (achievable with barrel roll) allows the player to bypass it without getting counted out. This is used on [[Rainbow Road#Unrestricted Flap|Rainbow Road UR Flap]] to complete the full DLC shroomless.
+Horizontal OOB planes count a vehicle out if it travels through the plane in a certain direction. Passing through a horizontal OOB plane while upside down (achievable with barrel roll) allows the player to bypass it without getting counted out. This is used on Rainbow Road UR Flap to complete the full DLC shroomless.
 === Extended HWG ===
-Colliding with a barrel roll wall sets the "HWG timer" to 10 frames, during which barrel roll can be activated. This timer is so-named because it is also responsible for activating [[horizontal wall glitch]] (HWG). HWG usually lasts for 20 frames, but in certain cases, HWG will continue so long as the timer does not count down to 0. This can be exploited by continually riding a barrel roll wall so that the HWG timer continually resets to 10, thus extending the initial HWG. This is used on [[N64 DK's Jungle Parkway#Unrestricted Flap|N64 DK's Jungle Parkway UR Flap]] to reach the seam to the left of the finish line.
+Colliding with a barrel roll wall sets the "HWG timer" to 10 frames, during which barrel roll can be activated. This timer is so-named because it is also responsible for activating [[horizontal wall glitch]] (HWG). HWG usually lasts for 20 frames, but in certain cases, HWG will continue so long as the timer does not count down to 0. This can be exploited by riding a barrel roll wall so that the HWG timer continually resets to 10, thus extending the initial HWG. This is used on [[N64 DK's Jungle Parkway#Unrestricted Flap|N64 DK's Jungle Parkway UR Flap]] to reach the seam to the left of the finish line.