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Merged
blkerby merged 3 commits into from
Apr 9, 2025
Merged

Mother Brain left-to-right clips #2013

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e40398b
Mother Brain left-to-right clips
blkerby Apr 8, 2025
963e794
fix Rinka Wall Ice Clip strat
blkerby Apr 8, 2025
a96780e
add FIXME for L->R zebetite traversal
blkerby Apr 8, 2025
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12 changes: 12 additions & 0 deletions helpers.json
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Original file line number Diff line number Diff line change
Expand Up @@ -33,6 +33,18 @@
"requires": [ "Gravity" ],
"devNote": "In the original game Gravity provides full immunity, but some randomizers also require Varia."
},
{
"name": "h_fullEnemyDamageReduction",
"requires": [
"Gravity"
],
"note": [
"Suit requirements in order to have 75% damage reduction from enemies."
],
"devNote": [
"In the vanilla game, Gravity alone provides 75% damage reduction, but some randomizer may require both suits."
]
},
{
"name": "h_AllItemsSpawned",
"requires": [ "never" ],
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17 changes: 17 additions & 0 deletions logicalRequirements.md
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Expand Up @@ -354,6 +354,23 @@ __Example:__
]}
```

#### resourceMaxCapacity object
A `resourceMaxCapacity` object represents the need for Samus to have a capacity that does not exceed a set amount of a specific resource. It can have the following properties:
* _type:_ The type of resource. Can have the following values:
* Missile
* Super
* PowerBomb
* RegularEnergy
* ReserveEnergy
* _count:_ The amount of capacity that Samus must not exceed.

A `resourceMaxCapacity` requirement generally includes an implicit requirement of `canRiskPermanentLossOfAccess`. In some randomizer contexts, this may be unnecessary, for example if it is known that the player cannot have collected items that would exceed the expected capacity, or if it is possible for the player to disable the extra items.

__Example:__
```json
{"resourceMaxCapacity": [{"type": "RegularEnergy", "count": 299}]}
```

#### resourceAvailable object
A `resourceAvailable` object represents the need for Samus to be holding at least a set amount of a specific resource. It has the following properties:
* _type:_ The type of resource. Can have the following values:
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190 changes: 188 additions & 2 deletions region/tourian/main/Mother Brain Room.json
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Expand Up @@ -92,6 +92,15 @@
"mapTileMask": [
[1, 2, 1, 1]
]
},
{
"id": 8,
"name": "Standing on Top Left of Mother Brain Tank",
"nodeType": "junction",
"nodeSubType": "junction",
"mapTileMask": [
[2, 1, 1, 1]
]
}
],
"obstacles": [
Expand Down Expand Up @@ -175,7 +184,8 @@
"from": 1,
"to": [
{"id": 1},
{"id": 3}
{"id": 3},
{"id": 8}
]
},
{
Expand Down Expand Up @@ -236,6 +246,13 @@
{"id": 6},
{"id": 7}
]
},
{
"from": 8,
"to": [
{"id": 1},
{"id": 3}
]
}
],
"strats": [
Expand Down Expand Up @@ -291,6 +308,27 @@
"gModeRegainMobility": {},
"flashSuitChecked": true
},
{
"link": [1, 1],
"name": "Come in With R-Mode",
"entranceCondition": {
"comeInWithRMode": {}
},
"requires": [],
"clearsObstacles": ["A"],
"flashSuitChecked": true
},
{
"link": [1, 3],
"name": "Mother Brain Knockback",
"requires": [
"f_MotherBrainGlassBroken"
],
"note": [
"When the glass is broken, touching Mother Brain from the left will instantly transport Samus to the right.",
"This gives Samus i-frames and knockback but does not cause damage."
]
},
{
"id": 6,
"link": [1, 3],
Expand All @@ -304,6 +342,89 @@
"h_BypassMotherBrainRoom"
]
},
{
"link": [1, 8],
"name": "Suitless Crystal Flash Stand-Up With Ice",
"requires": [
{"notable": "Moondance Clip"},
{"not": "f_MotherBrainGlassBroken"},
"canTrickyDodgeEnemies",
"canTrickyUseFrozenEnemies",
"canCrystalFlash"
],
"note": [
"Freeze all 3 Rinkas at close to the same time, ",
"then quickly jump into the morph nook at the top-left of Mother Brain,",
"and perform a Crystal Flash to stand up.",
"If executed correctly, the Rinkas will not respawn during the Crystal Flash, so Samus will not take damage."
]
},
{
"link": [1, 8],
"name": "G-Mode Morph Crystal Flash Stand-Up With Full Suit Protection",
"entranceCondition": {
"comeInWithGMode": {
"mode": "any",
"morphed": true
}
},
"requires": [
{"notable": "Moondance Clip"},
{"not": "f_MotherBrainGlassBroken"},
"h_canArtificialMorphMovement",
"h_canArtificialMorphCrystalFlash",
"h_fullEnemyDamageReduction",
{"resourceCapacity": [{"type": "RegularEnergy", "count": 299}]},
{"resourceAtMost": [{"type": "Energy", "count": 800}]}
],
"flashSuitChecked": true,
"note": [
"Use artificial morph to go inside the nook at the top-left of Mother Brain,",
"then perform a Crystal Flash to stand up.",
"Samus will take rapid damage from the Rinkas during the Crystal Flash but will be able to survive",
"with the help of 75% damage reduction from suit protection."
],
"devNote": [
"We don't bother modeling the obstacle 'A' state here.",
"The strat will end with R-mode if direct G-mode was used.",
"But it doesn't matter, since this strat requires an E-Tank,",
"which means that R-mode (for 'light pillar' during the Mother Brain 2 fight) wouldn't be useful."
]
},
{
"link": [1, 8],
"name": "G-Mode Morph Crystal Flash Interrupt",
"entranceCondition": {
"comeInWithGMode": {
"mode": "direct",
"morphed": true
}
},
"requires": [
{"notable": "Moondance Clip"},
{"not": "f_MotherBrainGlassBroken"},
"h_canArtificialMorphMovement",
"h_canArtificialMorphCrystalFlash",
{"resourceMaxCapacity": [{"type": "RegularEnergy", "count": 299}]},
{"autoReserveTrigger": {"minReserveEnergy": 100}},
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@osse101 osse101 Apr 8, 2025

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  • The main use is to gain a flash suit and I don't believe that is tied to Moondance Clip when exiting out the left. Though, that is a trick that can be added to half the rooms with enemies.
  • I guess the Mother Brain encounter logic ensures you have the health to do the fight after autoReserveTrigger

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@blkerby blkerby Apr 8, 2025 •
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Yeah, I don't know that the flash suit would be useful here, but it is a side effect so I included it. The main use of the strat would be to break the glass from the left with artificial morph without needing suits. With the "disableable etanks" QoL, it would be possible to turn off all the ETanks while the CF fills reserves, then pause and turn them back on right before the reserve triggers. So in that case, with 4 reserve tanks and 3 E-Tanks you could end with 399 energy minus the Rinka hit and spike hit (if wall ice clipping through to the right), so enough to do the fight with Varia. But with breaking the glass on the left, leaving and coming back after refilling is also an option.

If the goal were to leave with a flash suit, I imagine it could be done without artificial morph movement, by doing the CF on the door ledge. That could be a separate strat sometime. Like you said, there will be a lot of strats like that.

One interesting thing that isn't addressed in this PR but is in the back of my mind is that after getting to the right of the tank (node 3), initiating the fight is not the only option, as you could also traverse the room in reverse and leave out the right door. Currently the logic for that would require the Zebetites to already be destroyed, but that can be refined later.

{"enemyDamage": {"enemy": "Rinka", "type": "contact", "hits": 1}},
{"gainFlashSuit": {}}
],
"flashSuitChecked": true,
"note": [
"Enter in R-mode or direct G-mode, and perform a Crystal Flash in the morph nook to the top-left of Mother Brain.",
"During the Crystal Flash, allow the Rinkas to damage Samus down and trigger an auto-reserve refill,",
"which will interrupt the Crystal Flash."
],
"detailNote": [
"The interruption of the Crystal Flash (due to the R-mode forced standup) limits the damage that Samus takes during it;",
"After the reserve trigger, Samus will take just one more Rinka hit."
],
"devNote": [
"Having a small amount of E-Tanks ensures the reserve tanks can be filled by the Crystal Flash before the auto-reserve trigger.",
"FIXME: A larger amount of E-Tanks can also work, but the reserves will not completely fill, so less energy would remain at the end."
]
},
{
"id": 7,
"link": [2, 2],
Expand Down Expand Up @@ -917,6 +1038,60 @@
{"enemyDamage": {"enemy": "Rinka", "type": "contact", "hits": 1}}
],
"setsFlags": ["f_KilledZebetites4"]
},
{
"link": [8, 1],
"name": "Moondance Clip Break Glass",
"requires": [
{"notable": "Moondance Clip"},
"Wave",
"canTrickyDodgeEnemies",
{"or": [
"Ice",
"canBeExtremelyPatient"
]},
"canMoondance",
{"enemyDamage": {"enemy": "Rinka", "type": "contact", "hits": 1}},
{"ammo": {"type": "Missile", "count": 18}}
],
"setsFlags": ["f_MotherBrainGlassBroken"],
"note": [
"To be able to break the glass and leave out the left side, Samus must be at a specific horizontal X pixel position ($63).",
"Therefore, the Crystal Flash should have been performed at this position;",
"For the moondance, moonfalls must be performed only left-to-right, or Samus will fall out.",
"After 176 moonfalls, Samus will clip down into the tank.",
"Angle down and fire 18 Missiles into Mother Brain to break the tank.",
"If Samus is correctly positioned, she will then fall out and be free to move to the left."
],
"detailNote": [
"If Samus is at position $62 (a pixel to the left of the correct position),",
"it is possible for a Rinka hit to knock back Samus into position $63."
],
"devNote": [
"FIXME: Using some Supers in place of Missiles could be possible,",
"but if too many are used it might trigger the fight cutscene."
]
},
{
"link": [8, 3],
"name": "Moondance Clip Rinka Wall Ice Clip",
"requires": [
{"notable": "Moondance Clip"},
"Wave",
"canTrickyDodgeEnemies",
"canMoondance",
"canWallIceClip",
{"spikeHits": 1}
],
"note": [
"Perform a moondance while killing the Rinkas, carefully avoiding being hit by them.",
"After 176 moonfalls, Samus will clip down into the tank.",
"Samus will be unable to turn around and will be invulnerable to Rinka hits.",
"Freeze a Rinka several pixels in front of Samus, to cause Samus to clip horizontally.",
"This will work regardless of whether Samus is facing left or right.",
"When Samus is close enough to the end, quickly turn around back and forth to wiggle out,",
"to avoid taking too much damage from the invisible spikes in the air."
]
}
],
"notables": [
Expand Down Expand Up @@ -956,11 +1131,22 @@
"Note that Zebetites cause i-frames but deal no damage.",
"With Ice+Wave, the Rinka can be frozen from above. With Ice+Plasma, Samus must crouch while freezing the Rinka from below."
]
},
{
"id": 5,
"name": "Moondance Clip",
"note": [
"Perform a Crystal Flash to stand up in the nook at the top-left of the Mother Brain tank.",
"Then moondance to clip down into the tank.",
"Use frozen Rinkas to clip through Mother Brain to the right.",
"Alternatively, with precise positioning, break the glass from the left side."
]
}
],
"nextStratId": 40,
"nextNotableId": 5,
"nextNotableId": 6,
"devNote": [
"FIXME: Add strats for destroying or clipping past Zebetites left-to-right.",
"FIXME: Maybe we can split MB into several events to properly indicate the ammo requirements?",
"FIXME: It is possible to Grapple teleport from Moat to the left of Mother Brain, through currently it has no known use."
]
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35 changes: 35 additions & 0 deletions schema/m3-requirements.schema.json
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Expand Up @@ -450,6 +450,41 @@
}
}
},
"resourceMaxCapacity": {
"type": "array",
"title": "Resource Max Capacity",
"description": "Fulfilled by having at most the given capacity for all given resource types",
"items": {
"type": "object",
"required": [
"type",
"count"
],
"minItems": 1,
"maxItems": 5,
"additionalProperties": false,
"properties": {
"type": {
"type": "string",
"enum": [
"Missile",
"Super",
"PowerBomb",
"RegularEnergy",
"ReserveEnergy"
],
"title": "Resource Type",
"description": "The type of resource held."
},
"count": {
"type": "integer",
"minimum": 0,
"title": "Resource Count",
"description": "The amount of resource capacity that Samus must not exceed."
}
}
}
},
"resourceAvailable": {
"type": "array",
"title": "Resource Available",
Expand Down