Countdown: Difference between revisions

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== Overview ==

The countdown lasts for the first 239 frames of the race. During the countdown, [[IV#Maximum speed | max speed]] is set to 0; additionally, bikes are put into a "slow fall" state, where they move downwards at a constant 1.3 u/f instead of being affected by gravity's constant 1.3 u/~~f^2~~ acceleration.

The countdown lasts for the first 239 frames of the race. During the countdown, [[IV#Maximum speed | max speed]] is set to 0; additionally, bikes are put into a "slow fall" state, where they move downwards at a constant 1.3 u/f instead of being affected by gravity's constant 1.3 u/f² acceleration.

Controls are limited during the countdown. Pressing A only affects the start boost charge, while pressing B has no effect. Stick inputs allow bikes to move by [[EV#Leaning | leaning]], and have no effect otherwise. Bikes are also allowed to [[wheelie]] by pressing up; wheelies are automatically cancelled after 15 frames since IV is 0. Wheelies can also cause the bike to go airborne, depending on the length of the bike.

== Start boost ==

As soon as the countdown ends, the vehicle can receive a [[Boost information | boost]] or burn out (~~spin~~ hitstun animation) according to the start boost charge value. It is clamped between 0 and 1, and is updated every frame according to the state of the A button. If A is pressed, the charge is set to [0.02 + 0.982 * (''previous value'')]. If A is not pressed, it is set to [0.96 * (''previous value'')]. These recursive equations can be rewritten as such:

As soon as the countdown ends, the vehicle can receive a [[Boost information | boost]] or burn out (hitstun animation lasting 120 frames) according to the start boost charge value. It is clamped between 0 and 1, and is updated every frame according to the state of the A button. If A is pressed, the charge is set to [0.02 + 0.982 * (''previous value'')]. If A is not pressed, it is set to [0.96 * (''previous value'')]. These recursive equations can be rewritten as such:

If A is pressed,<br>

Line 16:

where <math>n</math> is the number of frames the button is held or released.

The start boost increases max speed by 20%, grants an IV acceleration of 3 u/~~f^2~~, and lasts for a variable number of frames depending on the start boost charge. The possible start boost lengths are listed in the table below.

The start boost increases max speed by 20%, grants an IV acceleration of 3 u/f², and lasts for a variable number of frames depending on the start boost charge. The possible start boost lengths are listed in the table below.

{| class="wikitable" style="text-align:center;"

! Start boost charge

! Boost duration

! Boost duration (frames)

|-

| 0 - 0.85

Line 37:

| 45

|-

| 0.95 - 0.95

| 0.94 - 0.95

| 70

|-

Line 51:

Depending on the length of the bike, there are three main types of start slides.

*'''Short bikes''': Standard Bike S, Bullet Bike, Bit Bike, Quacker, Magikruiser, Dolphin Dasher, Standard Bike L, Shooting Star. They are unable to gain airtime during the countdown. As such, the optimal strategy is to wiggle sideways a short distance, following the optimal leaning pattern for |IV| < 5 u/f. These vehicles share the same optimal slide inputs, as the leaning pattern is the same for both IDBs and ODBs; however, they all slide a slightly different amount, as wheel EV dissipation varies slightly by vehicle.<ref>[https://discord.com/channels/214574342137315328/735589843513638940/1374115991713349722 Wiggle slide]</ref> Dolphin Dasher slides the furthest (by a small amount).

*'''Medium-length bikes''': Jet Bubble, Standard Bike M, Mach Bike, Sugarscoot, Zip Zip, Flame Runner. These bikes can gain a small amount of airtime (12-15 frames) by performing a double wheelie, but only while A is not held. (Holding A increases grip to the ground.) As such, these bikes perform one small double wheelie, then wiggle or perform single wheelies for the rest of the countdown. In theory, each bike should have its own unique optimal slide, but slides have only been made for Flame Runner ~~and Mach Bike.~~<ref>[https://discord.com/channels/214574342137315328/600410593937195069/1224750661988778085 Flame Runner slide]</ref><ref>[https://discord.com/channels/214574342137315328/600410593937195069/1230105156507664386 Mach Bike slide]</ref>

*'''Medium-length bikes''': Jet Bubble, Standard Bike M, Mach Bike, Sugarscoot, Zip Zip, Flame Runner. These bikes can gain a small amount of airtime (12-15 frames) by performing a double wheelie, but only while A is not held. (Holding A increases grip to the ground.) As such, these bikes perform one small double wheelie, then wiggle or perform single wheelies for the rest of the countdown. In theory, each bike should have its own unique optimal slide, but slides have only been made for Flame Runner,<ref>[https://discord.com/channels/214574342137315328/600410593937195069/1224750661988778085 Flame Runner slide]</ref>, Mach Bike,<ref>[https://discord.com/channels/214574342137315328/600410593937195069/1230105156507664386 Mach Bike slide]</ref> and Zip Zip.<ref>[https://discord.com/channels/214574342137315328/735589843513638940/1440023652174135398 Zip Zip slide]</ref>

*'''Long bikes''': Sneakster, Wario Bike, Spear, Phantom. These bikes can go airborne at will by performing both single (12-15 frames), and double wheelies (20+ frames). For each bike, the optimal strategy is to perform one single wheelie to rotate and move a small amount, then two double wheelies to slide very far. An optimal strat slide has been made for each long bike. Spear slides the furthest,<ref>[https://discord.com/channels/214574342137315328/600410593937195069/1261061431990812682 Spear slide]</ref> followed by Sneakster,<ref>[https://discord.com/channels/214574342137315328/1406282264932782242/1430861007139639366 Sneakster slide]</ref> Wario Bike,<ref>[https://discord.com/channels/214574342137315328/600410593937195069/1261030328869453864 Wario Bike slide]</ref> and Phantom.<ref>[https://discord.com/channels/214574342137315328/735589843513638940/1433516103786696845 Phantom slide]</ref>

On all bikes, performing a wheelie shortly before the end of the countdown causes the bike's pitch to quickly decrease during the start boost, due to the acceleration. With the right inputs during the slide, the bike can get airtime pockets during the boost, as late as during the boost deceleration. These airtime pockets can be used for a [[Drift#Slipdrift | slipdrift]], known as a '''start slip''', or a [[Wheelie#Slipchain | slipchain]].

=== Start curve ===

After performing a start slide, the optimal strategy is to turn in the same direction to realign, known as a start curve. Start curves actually save a few milliseconds over realigning and driving in a straight line, due to EV to IV conversion causing the bike to gain a small amount of extra speed. To ~~gain the most amount of speed possible~~, it is better to keep turning in the direction of the slide and delay the wheelie as much as possible, then turn in the opposite direction to realign, even if this ~~causes~~ a suboptimal driving line.

After performing a start slide, the optimal strategy is to turn in the same direction to realign, known as a start curve. Start curves actually save a few milliseconds over realigning and driving in a straight line, due to EV to IV conversion causing the bike to gain a small amount of extra speed. To optimize start curves, it is better to keep turning in the direction of the slide and delay the wheelie as much as possible, then turn in the opposite direction to realign, even if this leads to a suboptimal driving line. This ensures the increased IV due to EV conversion is preserved as long as possible during the acceleration.

On slippery road, EV to IV conversion works differently, allowing bikes to gain slightly more IV during the start curve. As such, there are different optimal start slides for regular and slippery road; for the latter, sacrificing a bit of distance for more rotation saves time during the start curve.

On slippery road, EV to IV conversion works differently, allowing bikes to gain slightly more IV during the start curve. As such, there are different optimal start slides for regular and slippery road; for the latter, sacrificing a bit of distance for more rotation saves time during the start curve.<ref>[https://discord.com/channels/214574342137315328/735589843513638940/1268880123332005941 Spear slide on slippery road]</ref> On slippery road only, the traction stat has a very small effect on the movement of start slides; it is the only character stat to affect start slides.

== Start slide repository ==

@@ Line 2: / Line 2: @@
 == Overview ==
-The countdown lasts for the first 239 frames of the race. During the countdown, [[IV#Maximum speed | max speed]] is set to 0; additionally, bikes are put into a "slow fall" state, where they move downwards at a constant 1.3 u/f instead of being affected by gravity's constant 1.3 u/f^2 acceleration.
+The countdown lasts for the first 239 frames of the race. During the countdown, [[IV#Maximum speed | max speed]] is set to 0; additionally, bikes are put into a "slow fall" state, where they move downwards at a constant 1.3 u/f instead of being affected by gravity's constant 1.3 u/f² acceleration.
 Controls are limited during the countdown. Pressing A only affects the start boost charge, while pressing B has no effect. Stick inputs allow bikes to move by [[EV#Leaning | leaning]], and have no effect otherwise. Bikes are also allowed to [[wheelie]] by pressing up; wheelies are automatically cancelled after 15 frames since IV is 0. Wheelies can also cause the bike to go airborne, depending on the length of the bike.
 == Start boost ==
-As soon as the countdown ends, the vehicle can receive a [[Boost information | boost]] or burn out (spin hitstun animation) according to the start boost charge value. It is clamped between 0 and 1, and is updated every frame according to the state of the A button. If A is pressed, the charge is set to [0.02 + 0.982 * (''previous value'')]. If A is not pressed, it is set to [0.96 * (''previous value'')]. These recursive equations can be rewritten as such:
+As soon as the countdown ends, the vehicle can receive a [[Boost information | boost]] or burn out (hitstun animation lasting 120 frames) according to the start boost charge value. It is clamped between 0 and 1, and is updated every frame according to the state of the A button. If A is pressed, the charge is set to [0.02 + 0.982 * (''previous value'')]. If A is not pressed, it is set to [0.96 * (''previous value'')]. These recursive equations can be rewritten as such:
 If A is pressed,<br>
@@ Line 16: / Line 16: @@
 where <math>n</math> is the number of frames the button is held or released.
-The start boost increases max speed by 20%, grants an IV acceleration of 3 u/f^2, and lasts for a variable number of frames depending on the start boost charge. The possible start boost lengths are listed in the table below.
+The start boost increases max speed by 20%, grants an IV acceleration of 3 u/f², and lasts for a variable number of frames depending on the start boost charge. The possible start boost lengths are listed in the table below.
 {| class="wikitable"  style="text-align:center;"
 ! Start boost charge
-! Boost duration
+! Boost duration (frames)
 |-
 | 0 - 0.85
@@ Line 37: / Line 37: @@
 | 45
 |-
-| 0.95 - 0.95
+| 0.94 - 0.95
 | 70
 |-
@@ Line 51: / Line 51: @@
 Depending on the length of the bike, there are three main types of start slides.
 *'''Short bikes''': Standard Bike S, Bullet Bike, Bit Bike, Quacker, Magikruiser, Dolphin Dasher, Standard Bike L, Shooting Star. They are unable to gain airtime during the countdown. As such, the optimal strategy is to wiggle sideways a short distance, following the optimal leaning pattern for |IV| < 5 u/f. These vehicles share the same optimal slide inputs, as the leaning pattern is the same for both IDBs and ODBs; however, they all slide a slightly different amount, as wheel EV dissipation varies slightly by vehicle.<ref>[https://discord.com/channels/214574342137315328/735589843513638940/1374115991713349722 Wiggle slide]</ref> Dolphin Dasher slides the furthest (by a small amount).
-*'''Medium-length bikes''': Jet Bubble, Standard Bike M, Mach Bike, Sugarscoot, Zip Zip, Flame Runner. These bikes can gain a small amount of airtime (12-15 frames) by performing a double wheelie, but only while A is not held. (Holding A increases grip to the ground.) As such, these bikes perform one small double wheelie, then wiggle or perform single wheelies for the rest of the countdown. In theory, each bike should have its own unique optimal slide, but slides have only been made for Flame Runner and Mach Bike.<ref>[https://discord.com/channels/214574342137315328/600410593937195069/1224750661988778085 Flame Runner slide]</ref><ref>[https://discord.com/channels/214574342137315328/600410593937195069/1230105156507664386 Mach Bike slide]</ref>
+*'''Medium-length bikes''': Jet Bubble, Standard Bike M, Mach Bike, Sugarscoot, Zip Zip, Flame Runner. These bikes can gain a small amount of airtime (12-15 frames) by performing a double wheelie, but only while A is not held. (Holding A increases grip to the ground.) As such, these bikes perform one small double wheelie, then wiggle or perform single wheelies for the rest of the countdown. In theory, each bike should have its own unique optimal slide, but slides have only been made for Flame Runner,<ref>[https://discord.com/channels/214574342137315328/600410593937195069/1224750661988778085 Flame Runner slide]</ref>, Mach Bike,<ref>[https://discord.com/channels/214574342137315328/600410593937195069/1230105156507664386 Mach Bike slide]</ref> and Zip Zip.<ref>[https://discord.com/channels/214574342137315328/735589843513638940/1440023652174135398 Zip Zip slide]</ref>
 *'''Long bikes''': Sneakster, Wario Bike, Spear, Phantom. These bikes can go airborne at will by performing both single (12-15 frames), and double wheelies (20+ frames). For each bike, the optimal strategy is to perform one single wheelie to rotate and move a small amount, then two double wheelies to slide very far. An optimal strat slide has been made for each long bike. Spear slides the furthest,<ref>[https://discord.com/channels/214574342137315328/600410593937195069/1261061431990812682 Spear slide]</ref> followed by Sneakster,<ref>[https://discord.com/channels/214574342137315328/1406282264932782242/1430861007139639366 Sneakster slide]</ref> Wario Bike,<ref>[https://discord.com/channels/214574342137315328/600410593937195069/1261030328869453864 Wario Bike slide]</ref> and Phantom.<ref>[https://discord.com/channels/214574342137315328/735589843513638940/1433516103786696845 Phantom slide]</ref>
+On all bikes, performing a wheelie shortly before the end of the countdown causes the bike's pitch to quickly decrease during the start boost, due to the acceleration. With the right inputs during the slide, the bike can get airtime pockets during the boost, as late as during the boost deceleration. These airtime pockets can be used for a [[Drift#Slipdrift | slipdrift]], known as a '''start slip''', or a [[Wheelie#Slipchain | slipchain]].
 === Start curve ===
-After performing a start slide, the optimal strategy is to turn in the same direction to realign, known as a start curve. Start curves actually save a few milliseconds over realigning and driving in a straight line, due to EV to IV conversion causing the bike to gain a small amount of extra speed. To gain the most amount of speed possible, it is better to keep turning in the direction of the slide and delay the wheelie as much as possible, then turn in the opposite direction to realign, even if this causes a suboptimal driving line.
+After performing a start slide, the optimal strategy is to turn in the same direction to realign, known as a start curve. Start curves actually save a few milliseconds over realigning and driving in a straight line, due to EV to IV conversion causing the bike to gain a small amount of extra speed. To optimize start curves, it is better to keep turning in the direction of the slide and delay the wheelie as much as possible, then turn in the opposite direction to realign, even if this leads to a suboptimal driving line. This ensures the increased IV due to EV conversion is preserved as long as possible during the acceleration.
-On slippery road, EV to IV conversion works differently, allowing bikes to gain slightly more IV during the start curve. As such, there are different optimal start slides for regular and slippery road; for the latter, sacrificing a bit of distance for more rotation saves time during the start curve.
+On slippery road, EV to IV conversion works differently, allowing bikes to gain slightly more IV during the start curve. As such, there are different optimal start slides for regular and slippery road; for the latter, sacrificing a bit of distance for more rotation saves time during the start curve.<ref>[https://discord.com/channels/214574342137315328/735589843513638940/1268880123332005941 Spear slide on slippery road]</ref> On slippery road only, the traction stat has a very small effect on the movement of start slides; it is the only character stat to affect start slides.
 == Start slide repository ==
 <references/>