Merge pull request 'rare_monsters' (#60) from rare_monsters into master

Reviewed-on: #60

data/battle_param/ep1_multi_hard.toml

@@ -229,7 +229,7 @@ lck = 20
 esp = 15
 exp = 40
 
-[EasterRappy]
+[AlRappy]
 atp = 527
 mst = 0
 evp = 90

data/battle_param/ep1_multi_normal.toml

@@ -229,7 +229,7 @@ lck = 10
 esp = 0
 exp = 4
 
-[EasterRappy]
+[AlRappy]
 atp = 184
 mst = 0
 evp = 45

data/battle_param/ep1_multi_ultimate.toml

@@ -229,7 +229,7 @@ lck = 30
 esp = 35
 exp = 256
 
-[EasterRappy]
+[AlRappy]
 atp = 2100
 mst = 0
 evp = 419

data/battle_param/ep1_multi_veryhard.toml

@@ -229,7 +229,7 @@ lck = 35
 esp = 30
 exp = 88
 
-[EasterRappy]
+[AlRappy]
 atp = 913
 mst = 0
 evp = 194

data/battle_param/ep1_rare_monster.toml

@@ -0,0 +1,9 @@
+# 1/10 = 0.1
+# 1/100 = 0.01
+# 1/256 = 0.00390625
+# 1/512 = 0.001953125
+
+Hildebear = 0.001953125
+RagRappy = 0.001953125
+PoisonLily = 0.001953125
+PofuillySlime = 0.001953125

data/battle_param/ep1_solo_hard.toml

@@ -229,7 +229,7 @@ lck = 20
 esp = 15
 exp = 40
 
-[EasterRappy]
+[AlRappy]
 atp = 443
 mst = 0
 evp = 28

data/battle_param/ep1_solo_normal.toml

@@ -229,7 +229,7 @@ lck = 10
 esp = 0
 exp = 4
 
-[EasterRappy]
+[AlRappy]
 atp = 150
 mst = 0
 evp = 5

data/battle_param/ep1_solo_ultimate.toml

@@ -229,7 +229,7 @@ lck = 30
 esp = 30
 exp = 256
 
-[EasterRappy]
+[AlRappy]
 atp = 1800
 mst = 0
 evp = 276

data/battle_param/ep1_solo_veryhard.toml

@@ -229,7 +229,7 @@ lck = 35
 esp = 30
 exp = 88
 
-[EasterRappy]
+[AlRappy]
 atp = 707
 mst = 0
 evp = 55

data/battle_param/ep2_rare_monster.toml

@@ -0,0 +1,9 @@
+# 1/10 = 0.1
+# 1/100 = 0.01
+# 1/256 = 0.00390625
+# 1/512 = 0.001953125
+
+Hildebear = 0.001953125
+RagRappy = 0.001953125
+PoisonLily = 0.001953125
+

data/battle_param/ep4_rare_monster.toml

@@ -0,0 +1,13 @@
+# 1/10 = 0.1
+# 1/100 = 0.01
+# 1/256 = 0.00390625
+# 1/512 = 0.001953125
+
+SandRappyCrater = 0.001953125
+ZuCrater = 0.001953125
+Dorphon = 0.001953125
+SandRappyDesert = 0.001953125
+ZuDesert = 0.001953125
+MerissaA = 0.001953125
+Shambertin = 0.1
+SaintMillion = 0.1

data/battle_param/global_rare_monster.toml

@@ -0,0 +1,11 @@
+# 1/100 = 0.01
+# 1/256 = 0.00390625
+# 1/512 = 0.001953125
+
+# Everything that isn't Kondrieu
+[[Grunt]]
+rate = 0.01
+
+# Kondrieu
+[[Boss]]
+rate = 0.1

data/quests.toml

@@ -32,4 +32,8 @@ dat = "q233-ext-bb.dat"
 [[Retrieval.quests]]
 bin = "q236-ext-bb.bin"
 dat = "q236-ext-bb.dat"
-#drop_table = "q102-drops"
+#drop_table = "q102-drops"
+
+[[Retrieval.quests]]
+bin = "q118-vr-bb.bin"
+dat = "q118-vr-bb.dat"

src/ship/drops/mod.rs

@@ -55,6 +55,17 @@ pub fn load_data_file<T: serde::de::DeserializeOwned>(episode: Episode, difficul
     toml::from_str::<T>(s.as_str()).unwrap()
 }
 
+// this is just copypaste
+pub fn load_rare_monster_file<T: serde::de::DeserializeOwned>(episode: Episode) -> T {
+    // TODO: where does the rare monster toml file actually live
+    let mut path = PathBuf::from("data/battle_param/");
+    path.push(episode.to_string().to_lowercase() + "_rare_monster.toml");
+    
+    let mut f = File::open(path).unwrap();
+    let mut s = String::new();
+    f.read_to_string(&mut s);
+    toml::from_str::<T>(s.as_str()).unwrap()
+}
 
 #[derive(Debug, Serialize, Deserialize, Copy, Clone)]
 pub enum MonsterDropType {

src/ship/map/area.rs

@@ -208,6 +208,54 @@ impl MapArea {
             // MapArea::TestMapEp4 => 10,
         }
     }
+
+    pub fn to_episode(self) -> Episode {
+        match self {
+            MapArea::Pioneer2Ep1 => Episode::One,
+            MapArea::Forest1 => Episode::One,
+            MapArea::Forest2 => Episode::One,
+            MapArea::Caves1 => Episode::One,
+            MapArea::Caves2 => Episode::One,
+            MapArea::Caves3 => Episode::One,
+            MapArea::Mines1 => Episode::One,
+            MapArea::Mines2 => Episode::One,
+            MapArea::Ruins1 => Episode::One,
+            MapArea::Ruins2 => Episode::One,
+            MapArea::Ruins3 => Episode::One,
+            MapArea::Dragon => Episode::One,
+            MapArea::DeRolLe => Episode::One,
+            MapArea::VolOpt => Episode::One,
+            MapArea::DarkFalz => Episode::One,
+            MapArea::Pioneer2Ep2 => Episode::Two,
+            MapArea::VrTempleAlpha => Episode::Two,
+            MapArea::VrTempleBeta => Episode::Two,
+            MapArea::VrSpaceshipAlpha => Episode::Two,
+            MapArea::VrSpaceshipBeta => Episode::Two,
+            MapArea::Cca => Episode::Two,
+            MapArea::JungleAreaNorth => Episode::Two,
+            MapArea::JungleAreaEast => Episode::Two,
+            MapArea::Mountain => Episode::Two,
+            MapArea::Seaside => Episode::Two,
+            MapArea::SeabedUpper => Episode::Two,
+            MapArea::SeabedLower => Episode::Two,
+            MapArea::GalGryphon => Episode::Two,
+            MapArea::OlgaFlow => Episode::Two,
+            MapArea::BarbaRay => Episode::Two,
+            MapArea::GolDragon => Episode::Two,
+            MapArea::SeasideNight => Episode::Two,
+            MapArea::Tower => Episode::Two,
+            MapArea::Pioneer2Ep4 => Episode::Four,
+            MapArea::CraterEast => Episode::Four,
+            MapArea::CraterWest => Episode::Four,
+            MapArea::CraterSouth => Episode::Four,
+            MapArea::CraterNorth => Episode::Four,
+            MapArea::CraterInterior => Episode::Four,
+            MapArea::SubDesert1 => Episode::Four,
+            MapArea::SubDesert2 => Episode::Four,
+            MapArea::SubDesert3 => Episode::Four,
+            MapArea::SaintMillion => Episode::Four,
+        }
+    }
 }
 
 

src/ship/map/enemy.rs

@@ -1,5 +1,6 @@
 // TOOD: `pub(super) for most of these?`
 use std::io::{Read};
+use std::collections::HashMap;
 
 use byteorder::{LittleEndian, ReadBytesExt};
 use thiserror::Error;
@@ -9,6 +10,10 @@ use crate::ship::room::Episode;
 
 use crate::ship::map::*;
 
+use rand::{Rng, SeedableRng};
+use serde::{Serialize, Deserialize};
+use crate::ship::drops::{load_rare_monster_file};
+
 #[derive(Debug, Copy, Clone)]
 pub struct RawMapEnemy {
     id: u32,
@@ -37,7 +42,7 @@ pub struct RawMapEnemy {
 impl RawMapEnemy {
     pub fn from_byte_stream<R: Read>(cursor: &mut R) -> Result<RawMapEnemy, std::io::Error> {
         Ok(RawMapEnemy {
-            id: cursor.read_u32::<LittleEndian>()?,
+            id: cursor.read_u32::<LittleEndian>()?, // TODO: is this really u32? shiny monsters are referred to by u16 in the client
             _unknown1: cursor.read_u16::<LittleEndian>()?,
             children: cursor.read_u16::<LittleEndian>()?,
             _map_area: cursor.read_u16::<LittleEndian>()?,
@@ -70,6 +75,38 @@ pub enum MapEnemyError {
     MapAreaError(#[from] MapAreaError),
 }
 
+// making this `pub type` doesn't allow `impl`s to be defined?
+#[derive(Clone, Debug, Serialize, Deserialize)]
+pub struct RareMonsterAppearTable {
+    pub appear_rate: HashMap<MonsterType, f32>,
+}
+
+impl RareMonsterAppearTable {
+    pub fn new(episode: Episode) -> RareMonsterAppearTable {
+        let cfg: HashMap<String, f32> = load_rare_monster_file(episode);
+
+        let appear_rates: HashMap<MonsterType, f32> = cfg
+            .into_iter()
+            .map(|(monster, rate)| {
+                let monster: MonsterType = monster.parse().unwrap(); // TODO: don't unwrap!
+                let appear_rate = rate;
+                (monster, appear_rate)
+            })
+            .collect();
+
+        RareMonsterAppearTable {
+            appear_rate: appear_rates,
+        }
+    }
+
+    pub fn roll_appearance(&self, monster: &MonsterType) -> bool {
+        if rand_chacha::ChaChaRng::from_entropy().gen::<f32>() < *self.appear_rate.get(monster).unwrap_or(&0.0f32) {
+            return true
+        }
+        false
+    }
+}
+
 
 #[derive(Debug, Copy, Clone)]
 pub struct MapEnemy {
@@ -80,21 +117,23 @@ pub struct MapEnemy {
     pub player_hit: [bool; 4],
     pub dropped_item: bool,
     pub gave_exp: bool,
+    pub shiny: bool,
 }
 
 impl MapEnemy {
     pub fn from_raw(enemy: RawMapEnemy, episode: &Episode, map_area: &MapArea /*, battleparam */) -> Result<MapEnemy, MapEnemyError> {
         // TODO: rare enemies ep1-4, tower lilys, event rappies, ult variants?
+        // TODO: check what "skin" actually does. some unexpected enemies have many (panarms, slimes, lilys)
         let monster = match map_area {
             MapArea::Forest1 | MapArea::Forest2 | MapArea::Dragon | 
             MapArea::Caves1  | MapArea::Caves2  | MapArea::Caves3 | MapArea::DeRolLe | 
             MapArea::Mines1  | MapArea::Mines2  | MapArea::VolOpt | 
             MapArea::Ruins1  | MapArea::Ruins2  | MapArea::Ruins3 | MapArea::DarkFalz => {
                 match (enemy, episode) {
-                    (RawMapEnemy {id: 64, ..}, _) => MonsterType::Hildebear,
-                    // (RawMapEnemy {id: 64, ..}, _) => MonsterType::Hildeblue,
-                    (RawMapEnemy {id: 65, ..}, _) => MonsterType::RagRappy,
-                    // (RawMapEnemy {id: 65, ..}, _) => MonsterType::AlRappy,
+                    (RawMapEnemy {id: 64, skin: 0, ..}, _) => MonsterType::Hildebear,
+                    (RawMapEnemy {id: 64, skin: 1, ..}, _) => MonsterType::Hildeblue,
+                    (RawMapEnemy {id: 65, skin: 0, ..}, _) => MonsterType::RagRappy,
+                    (RawMapEnemy {id: 65, skin: 1, ..}, _) => MonsterType::AlRappy,
                     (RawMapEnemy {id: 66, ..}, _) => MonsterType::Monest,
                     (RawMapEnemy {id: 67, field2: 0, ..}, _) => MonsterType::SavageWolf,
                     (RawMapEnemy {id: 67, ..}, _) => MonsterType::BarbarousWolf,
@@ -103,13 +142,16 @@ impl MapEnemy {
                     (RawMapEnemy {id: 68, skin: 2, ..}, _) => MonsterType::Gigobooma,
                     (RawMapEnemy {id: 96, ..}, _) => MonsterType::GrassAssassin,
                     (RawMapEnemy {id: 97, ..}, _) => MonsterType::PoisonLily,
-                    // (RawMapEnemy {id: 97, ..}, _) => MonsterType::NarLily,
+                    // (RawMapEnemy {id: 97, skin: 0, ..}, _) => MonsterType::PoisonLily,
+                    // (RawMapEnemy {id: 97, skin: 1, ..}, _) => MonsterType::NarLily,
                     (RawMapEnemy {id: 98, ..}, _) => MonsterType::NanoDragon,
                     (RawMapEnemy {id: 99, skin: 0, ..}, _) => MonsterType::EvilShark,
                     (RawMapEnemy {id: 99, skin: 1, ..}, _) => MonsterType::PalShark,
                     (RawMapEnemy {id: 99, skin: 2, ..}, _) => MonsterType::GuilShark,
                     (RawMapEnemy {id: 100, ..}, _) => MonsterType::PofuillySlime,
-                    // (RawMapEnemy {id: 100, ..}, _) => MonsterType::PouillySlime,
+                    // (RawMapEnemy {id: 100, skin: 0, ..}, _) => MonsterType::PofuillySlime,
+                    // (RawMapEnemy {id: 100, skin: 1, ..}, _) => MonsterType::PouillySlime,
+                    // (RawMapEnemy {id: 100, skin: 2, ..}, _) => MonsterType::PofuillySlime,
                     (RawMapEnemy {id: 101, ..}, _) => MonsterType::PanArms,
                     (RawMapEnemy {id: 128, skin: 0, ..}, _) => MonsterType::Dubchic,
                     (RawMapEnemy {id: 128, skin: 1, ..}, _) => MonsterType::Gillchic,
@@ -122,6 +164,7 @@ impl MapEnemy {
                     (RawMapEnemy {id: 160, ..}, _) => MonsterType::Delsaber,
                     (RawMapEnemy {id: 161, ..}, _) => MonsterType::ChaosSorcerer,
                     (RawMapEnemy {id: 162, ..}, _) => MonsterType::DarkGunner,
+                    (RawMapEnemy {id: 163, ..}, _) => MonsterType::DeathGunner,
                     (RawMapEnemy {id: 164, ..}, _) => MonsterType::ChaosBringer,
                     (RawMapEnemy {id: 165, ..}, _) => MonsterType::DarkBelra,
                     (RawMapEnemy {id: 166, skin: 0, ..}, _) => MonsterType::Dimenian,
@@ -143,17 +186,16 @@ impl MapEnemy {
             MapArea::JungleAreaNorth | MapArea::JungleAreaEast | MapArea::Mountain | MapArea::Seaside | MapArea::SeasideNight | MapArea::Cca | MapArea::GalGryphon |
             MapArea::SeabedUpper | MapArea::SeabedLower | MapArea::OlgaFlow => {
                 match (enemy, episode) {
-                    (RawMapEnemy {id: 64, ..}, _) => MonsterType::Hildebear,
-                    // (RawMapEnemy {id: 64, ..}, _) => MonsterType::Hildeblue,
-                    (RawMapEnemy {id: 65, ..}, _) => MonsterType::RagRappy,
-                    // (RawMapEnemy {id: 65, ..}, _) => MonsterType::EventRappy,
+                    (RawMapEnemy {id: 64, skin: 0, ..}, _) => MonsterType::Hildebear,
+                    (RawMapEnemy {id: 64, skin: 1, ..}, _) => MonsterType::Hildeblue,
+                    (RawMapEnemy {id: 65, skin: 0, ..}, _) => MonsterType::RagRappy,
+                    (RawMapEnemy {id: 65, skin: 1, ..}, _) => MonsterType::EventRappy,
                     (RawMapEnemy {id: 66, ..}, _) => MonsterType::Monest,
                     (RawMapEnemy {id: 67, field2: 0, ..}, _) => MonsterType::SavageWolf,
                     (RawMapEnemy {id: 67, ..}, _) => MonsterType::BarbarousWolf,
                     (RawMapEnemy {id: 96, ..}, _) => MonsterType::GrassAssassin,
-                    (RawMapEnemy {id: 97, ..}, _) => MonsterType::PoisonLily,
-                    // (RawMapEnemy {id: 97, ..}, _) => MonsterType::NarLily,
-                    // (RawMapEnemy {id: 97, ..}, _) => MonsterType::DelLily,
+                    (RawMapEnemy {id: 97, skin: 0, ..}, _) => MonsterType::PoisonLily,
+                    (RawMapEnemy {id: 97, skin: 1, ..}, _) => MonsterType::NarLily,
                     (RawMapEnemy {id: 101, ..}, _) => MonsterType::PanArms,
                     (RawMapEnemy {id: 128, skin: 0, ..}, _) => MonsterType::Dubchic,
                     (RawMapEnemy {id: 128, skin: 1, ..}, _) => MonsterType::Gillchic,
@@ -213,38 +255,38 @@ impl MapEnemy {
 
             MapArea::CraterEast | MapArea::CraterWest | MapArea::CraterSouth | MapArea::CraterNorth | MapArea::CraterInterior => {
                 match (enemy, episode) {
-                    (RawMapEnemy {id: 65, ..}, Episode::Four) => MonsterType::SandRappyCrater,
-                    // (RawMapEnemy {id: 65, ..}, Episode::Four) => MonsterType::DelRappyCrater,
+                    (RawMapEnemy {id: 65, skin: 0, ..}, Episode::Four) => MonsterType::SandRappyCrater,
+                    (RawMapEnemy {id: 65, skin: 1, ..}, Episode::Four) => MonsterType::DelRappyCrater,
                     (RawMapEnemy {id: 272, ..}, _) => MonsterType::Astark,
                     (RawMapEnemy {id: 273, field2: 0, ..}, _) => MonsterType::SatelliteLizardCrater,
                     (RawMapEnemy {id: 273, ..}, _) => MonsterType::YowieCrater,
-                    (RawMapEnemy {id: 276, ..}, _) => MonsterType::ZuCrater,
-                    // (RawMapEnemy {id: 276, ..}, _) => MonsterType::PazuzuCrater,
+                    (RawMapEnemy {id: 276, skin: 0, ..}, _) => MonsterType::ZuCrater,
+                    (RawMapEnemy {id: 276, skin: 1, ..}, _) => MonsterType::PazuzuCrater,
                     (RawMapEnemy {id: 277, skin: 0, ..}, _) => MonsterType::Boota,
                     (RawMapEnemy {id: 277, skin: 1, ..}, _) => MonsterType::ZeBoota,
                     (RawMapEnemy {id: 277, skin: 2, ..}, _) => MonsterType::BaBoota,
-                    (RawMapEnemy {id: 278, ..}, _) => MonsterType::Dorphon,
-                    // (RawMapEnemy {id: 278, ..}, _) => MonsterType::DorphonEclair,
+                    (RawMapEnemy {id: 278, skin: 0, ..}, _) => MonsterType::Dorphon,
+                    (RawMapEnemy {id: 278, skin: 1, ..}, _) => MonsterType::DorphonEclair,
                     _ => return Err(MapEnemyError::UnknownEnemyId(enemy.id))
                 }
             },
             MapArea::SubDesert1 | MapArea::SubDesert2 | MapArea::SubDesert3 | MapArea::SaintMillion => {
                 match (enemy, episode) {
-                    (RawMapEnemy {id: 65, ..}, Episode::Four) => MonsterType::SandRappyDesert,
-                    // (RawMapEnemy {id: 65, ..}, Episode::Four) => MonsterType::DelRappyDesert,
+                    (RawMapEnemy {id: 65, skin: 0, ..}, Episode::Four) => MonsterType::SandRappyDesert,
+                    (RawMapEnemy {id: 65, skin: 1, ..}, Episode::Four) => MonsterType::DelRappyDesert,
                     (RawMapEnemy {id: 273, field2: 0, ..}, _) => MonsterType::SatelliteLizardDesert,
                     (RawMapEnemy {id: 273, ..}, _) => MonsterType::YowieDesert,
-                    (RawMapEnemy {id: 274, ..}, _) => MonsterType::MerissaA,
-                    // (RawMapEnemy {id: 274, ..}, _) => MonsterType::MerissaAA,
+                    (RawMapEnemy {id: 274, skin: 0, ..}, _) => MonsterType::MerissaA,
+                    (RawMapEnemy {id: 274, skin: 1, ..}, _) => MonsterType::MerissaAA,
                     (RawMapEnemy {id: 275, ..}, _) => MonsterType::Girtablulu,
-                    (RawMapEnemy {id: 276, ..}, _) => MonsterType::ZuDesert,
-                    // (RawMapEnemy {id: 276, ..}, _) => MonsterType::PazuzuDesert,
+                    (RawMapEnemy {id: 276, skin: 0, ..}, _) => MonsterType::ZuDesert,
+                    (RawMapEnemy {id: 276, skin: 1, ..}, _) => MonsterType::PazuzuDesert,
                     (RawMapEnemy {id: 279, skin: 0, ..}, _) => MonsterType::Goran,
                     (RawMapEnemy {id: 279, skin: 1, ..}, _) => MonsterType::PyroGoran,
                     (RawMapEnemy {id: 279, skin: 2, ..}, _) => MonsterType::GoranDetonator,
                     (RawMapEnemy {id: 281, skin: 0, ..}, _) => MonsterType::SaintMillion,
-                    (RawMapEnemy {id: 281, skin: 1, ..}, _) => MonsterType::Shambertin,
-                    // (RawMapEnemy {id: 281, skin: 1, ..}, _) => MonsterType::Kondrieu,
+                    (RawMapEnemy {id: 281, skin: 1, ..}, _) => MonsterType::Shambertin, // TODO: don't guess the skin
+                    (RawMapEnemy {id: 281, skin: 2, ..}, _) => MonsterType::Kondrieu, // TODO: don't guess the skin
                     _ => return Err(MapEnemyError::UnknownEnemyId(enemy.id))
                 }
             },
@@ -258,6 +300,7 @@ impl MapEnemy {
             dropped_item: false,
             gave_exp: false,
             player_hit: [false; 4],
+            shiny: false,
         })
     }
 
@@ -269,7 +312,56 @@ impl MapEnemy {
             dropped_item: false,
             gave_exp: false,
             player_hit: [false; 4],
+            shiny: false,
+        }
+    }
+
+    pub fn set_shiny(self) -> MapEnemy {
+        MapEnemy {
+            shiny: true,
+            ..self
+        }
+    }
+
+    pub fn has_rare_appearance(self) -> bool {
+        matches!(self.monster,
+            MonsterType::RagRappy | MonsterType::Hildebear |
+            MonsterType::PoisonLily | MonsterType::PofuillySlime |
+            MonsterType::SandRappyCrater | MonsterType::ZuCrater | MonsterType::Dorphon |
+            MonsterType::SandRappyDesert | MonsterType::ZuDesert | MonsterType::MerissaA |
+            MonsterType::SaintMillion | MonsterType::Shambertin
+        )
+    }
+    
+    /*
+    TODO: distinguish between a `random` rare monster and a `set/guaranteed` rare monster? (does any acceptable quest even have this?)
+    guaranteed rare monsters don't count towards the limit
+    */
+    pub fn set_rare_appearance(self) -> MapEnemy {
+        match (self.monster, self.map_area.to_episode()) {
+            (MonsterType::RagRappy, Episode::One) => {MapEnemy {monster: MonsterType::AlRappy, shiny:true, ..self}},
+            (MonsterType::RagRappy, Episode::Two) => {MapEnemy {monster: MonsterType::EventRappy, shiny:true, ..self}},
+            (MonsterType::Hildebear, _) => {MapEnemy {monster: MonsterType::Hildeblue, shiny:true, ..self}},
+            (MonsterType::PoisonLily, _) => {MapEnemy {monster: MonsterType::NarLily, shiny:true, ..self}},
+            (MonsterType::PofuillySlime, _) => {MapEnemy {monster: MonsterType::PouillySlime, shiny:true, ..self}},
+            (MonsterType::SandRappyCrater, _) => {MapEnemy {monster: MonsterType::DelRappyCrater, shiny:true, ..self}},
+            (MonsterType::ZuCrater, _) => {MapEnemy {monster: MonsterType::PazuzuCrater, shiny:true, ..self}},
+            (MonsterType::Dorphon, _) => {MapEnemy {monster: MonsterType::DorphonEclair, shiny:true, ..self}},
+            (MonsterType::SandRappyDesert, _) => {MapEnemy {monster: MonsterType::DelRappyDesert, shiny:true, ..self}},
+            (MonsterType::ZuDesert, _) => {MapEnemy {monster: MonsterType::PazuzuDesert, shiny:true, ..self}},
+            (MonsterType::MerissaA, _) => {MapEnemy {monster: MonsterType::MerissaAA, shiny:true, ..self}},
+            (MonsterType::SaintMillion, _) => {MapEnemy {monster: MonsterType::Kondrieu, shiny:true, ..self}},
+            (MonsterType::Shambertin, _) => {MapEnemy {monster: MonsterType::Kondrieu, shiny:true, ..self}},
+            _ => {self},
+        }
+    }
+    
+    // in theory this should only be called on monsters we know can have rare types
+    pub fn roll_appearance_for_mission(self, rare_monster_table: &RareMonsterAppearTable) -> MapEnemy {
+        if rare_monster_table.roll_appearance(&self.monster) {
+            return self.set_rare_appearance()
         }
+        self
     }
 }
 

src/ship/map/maps.rs

@@ -30,24 +30,30 @@ fn objects_from_map_data(path: PathBuf, episode: &Episode, map_area: &MapArea) -
 
 fn parse_enemy(episode: &Episode, map_area: &MapArea, raw_enemy: RawMapEnemy) -> Vec<Option<MapEnemy>> {
     let enemy = MapEnemy::from_raw(raw_enemy, episode, map_area);
+
     enemy
         .map_or(vec![None], |monster| {
             let mut monsters = vec![Some(monster)];
-
+            
             match monster.monster {
                 MonsterType::Monest => {
                     for _ in 0..30 {
                         monsters.push(Some(MapEnemy::new(MonsterType::Mothmant, monster.map_area)));
                     }
                 },
+                MonsterType::PanArms => {
+                    monsters.push(Some(MapEnemy::new(MonsterType::Hidoom, monster.map_area)));
+                    monsters.push(Some(MapEnemy::new(MonsterType::Migium, monster.map_area)));
+                },
                 MonsterType::PofuillySlime => {
-                    for _ in 0..4 {
+                    for _ in 0..5 {
                         monsters.push(Some(MapEnemy::new(MonsterType::PofuillySlime, monster.map_area)));
                     }
                 },
-                MonsterType::PanArms => {
-                    monsters.push(Some(MapEnemy::new(MonsterType::Hidoom, monster.map_area)));
-                    monsters.push(Some(MapEnemy::new(MonsterType::Migium, monster.map_area)));
+                MonsterType::PouillySlime => {
+                    for _ in 0..5 {
+                        monsters.push(Some(MapEnemy::new(MonsterType::PofuillySlime, monster.map_area)));
+                    }
                 },
                 MonsterType::SinowBeat => {
                     for _ in 0..4 {
@@ -180,7 +186,7 @@ pub struct Maps {
 }
 
 impl Maps {
-    pub fn new(room_mode: RoomMode) -> Maps {
+    pub fn new(room_mode: RoomMode, rare_monster_table: &enemy::RareMonsterAppearTable) -> Maps {
         let map_variants = match (room_mode.episode(), room_mode.single_player()) {
             (Episode::One, 0) => {
                 vec![MapVariant::new(MapArea::Pioneer2Ep1, MapVariantMode::Online),
@@ -272,16 +278,19 @@ impl Maps {
             _ => unreachable!()
         };
 
-        let maps = Maps {
-            enemy_data: map_variants.iter().fold(Vec::new(), |mut enemy_data, map_variant| {
-                enemy_data.append(&mut enemy_data_from_map_data(map_variant, &room_mode.episode()));
-                enemy_data
-            }),
-            object_data: map_variants.iter().map(|map_variant| {
-                objects_from_map_data(map_variant.obj_file().into(), &room_mode.episode(), &map_variant.map)
-            }).flatten().collect(),
-            map_variants,
+        let mut maps = Maps {
+            enemy_data: map_variants.iter()
+                        .fold(Vec::new(), |mut enemy_data, map_variant| {
+                            enemy_data.append(&mut enemy_data_from_map_data(map_variant, &room_mode.episode()));
+                            enemy_data
+                        }),
+            object_data: map_variants.iter()
+                        .map(|map_variant| {
+                            objects_from_map_data(map_variant.obj_file().into(), &room_mode.episode(), &map_variant.map)
+                        }).flatten().collect(),
+                        map_variants,
         };
+        maps.roll_monster_appearance(rare_monster_table);
         maps
     }
 
@@ -305,9 +314,49 @@ impl Maps {
             })
     }
 
-    pub fn set_quest_data(&mut self, enemies: Vec<Option<MapEnemy>>, objects: Vec<Option<MapObject>>) {
+    pub fn set_quest_data(&mut self, enemies: Vec<Option<MapEnemy>>, objects: Vec<Option<MapObject>>, rare_monster_appear_table: &RareMonsterAppearTable) {
         self.enemy_data = enemies;
+        self.roll_monster_appearance(rare_monster_appear_table);
         self.object_data = objects;
     }
-}
 
+    pub fn get_rare_monster_list(&self) -> Vec<u16> {
+        let mut rare_monsters = vec![0xFFFF; 16];
+        let shiny: Vec<(usize, &Option<MapEnemy>)> = self.enemy_data.iter()
+            .enumerate()
+            .filter(|(_,m)| {
+                if m.is_some() {
+                    m.unwrap().shiny
+                } else {
+                    false
+                }
+            })
+            .collect();
+        for monster in &shiny {
+            if let Some(j) = rare_monsters.iter().position(|&x| x == 0xFFFF) {
+                rare_monsters[j] = monster.0 as u16;
+            } else {
+                break
+            }
+        }
+        rare_monsters
+    }
+
+    pub fn roll_monster_appearance(&mut self, rare_monster_table: &RareMonsterAppearTable) {
+        self.enemy_data = self.enemy_data
+                            .iter()
+                            // .map(|&x| if x.is_some() && x.unwrap().has_rare_appearance() {
+                            .map(|&x|
+                                if let Some(monster) = x {
+                                    if monster.has_rare_appearance() {
+                                        Some(monster.roll_appearance_for_mission(rare_monster_table))
+                                    } else {
+                                        Some(monster)
+                                    }
+                                } else {
+                                    x
+                                }
+                            )
+                            .collect();
+    }
+}

src/ship/map/mod.rs

@@ -1,5 +1,5 @@
 pub mod area;
-mod enemy;
+pub mod enemy;
 mod object;
 mod variant;
 mod maps;

src/ship/packet/builder/room.rs

@@ -6,6 +6,7 @@ use crate::ship::location::{ClientLocation, RoomId, AreaClient, ClientLocationEr
 use crate::ship::room::RoomState;
 use crate::ship::items::ItemManager;
 use crate::ship::packet::builder::{player_header, player_info};
+use std::convert::TryInto;
 
 pub fn join_room(id: ClientId,
                  clients: &Clients,
@@ -71,3 +72,8 @@ pub fn add_to_room(_id: ClientId,
     })
 }
 
+pub fn build_rare_monster_list(rare_monster_vec: Vec<u16>) -> RareMonsterList {
+    RareMonsterList {
+        ids: rare_monster_vec.try_into().unwrap_or([0xFFFFu16; 16]),
+    }
+}

src/ship/packet/handler/quest.rs

@@ -68,7 +68,7 @@ pub fn quest_detail(id: ClientId, questdetailrequest: &QuestDetailRequest, quest
     Ok(Box::new(vec![(id, SendShipPacket::QuestDetail(qd))].into_iter()))
 }
 
-pub fn load_quest(id: ClientId, questmenuselect: &QuestMenuSelect, quests: &QuestList, clients: &mut Clients, client_location: &ClientLocation, rooms: &mut Rooms)
+pub fn player_chose_quest(id: ClientId, questmenuselect: &QuestMenuSelect, quests: &QuestList, clients: &mut Clients, client_location: &ClientLocation, rooms: &mut Rooms)
                   -> Result<Box<dyn Iterator<Item = (ClientId, SendShipPacket)> + Send>, ShipError> {
     let (_, category_quests) = quests.iter()
         .nth(questmenuselect.category as usize)
@@ -83,7 +83,7 @@ pub fn load_quest(id: ClientId, questmenuselect: &QuestMenuSelect, quests: &Ques
     let room = rooms.get_mut(room_id.0)
         .ok_or_else(|| ShipError::InvalidRoom(room_id.0 as u32))?.as_mut()
         .ok_or_else(|| ShipError::InvalidRoom(room_id.0 as u32))?;
-    room.maps.set_quest_data(quest.enemies.clone(), quest.objects.clone());
+    room.maps.set_quest_data(quest.enemies.clone(), quest.objects.clone(), &room.rare_monster_table);
     room.map_areas = quest.map_areas.clone();
 
     let bin = quest::quest_header(questmenuselect, &quest.bin_blob, "bin");

src/ship/packet/handler/room.rs

@@ -149,13 +149,17 @@ pub fn done_bursting(id: ClientId,
                      rooms: &mut Rooms)
                      -> Box<dyn Iterator<Item = (ClientId, SendShipPacket)> + Send> {
     let area = client_location.get_area(id).unwrap();
+    let mut rare_monster_list: Option<Vec<u16>> = None;
     if let RoomLobby::Room(room_id) = area {
         if let Some(room) = rooms.get_mut(room_id.0).unwrap().as_mut() {
             room.bursting = false;
-        }
+            rare_monster_list = Some(room.maps.get_rare_monster_list());
+        };
     }
     let area_client = client_location.get_local_client(id).unwrap(); // TODO: unwrap
-    Box::new(client_location.get_client_neighbors(id).unwrap().into_iter() // TODO: unwrap
+
+    let mut result: Box<dyn Iterator<Item=(ClientId, SendShipPacket)> + Send> = Box::new(
+        client_location.get_client_neighbors(id).unwrap().into_iter() // TODO: unwrap
              .map(move |client| {
                  vec![
                      (client.client, SendShipPacket::Message(Message::new(GameMessage::BurstDone(BurstDone {
@@ -163,7 +167,17 @@ pub fn done_bursting(id: ClientId,
                          target: 0
                      })))),
                  ]
-             }).flatten())
+             })
+             .flatten()
+    );
+
+    // TODO: check how often `done_bursting` is called. ie: make sure it's only used when joining a room and not each time a player warps in a pipe
+    if let Some(rare_list) = rare_monster_list {
+        let rare_monster_packet = SendShipPacket::RareMonsterList(builder::room::build_rare_monster_list(rare_list));
+        result = Box::new(result.chain(vec![(id, rare_monster_packet)])); // TODO: make sure we arent clobbering `result` here
+    }
+
+    result
 }
 
 pub fn request_room_list(id: ClientId,

src/ship/room.rs

@@ -1,13 +1,15 @@
 use std::collections::HashMap;
 use std::convert::{From, Into, TryFrom, TryInto};
 
+use thiserror::Error;
+
 use rand::Rng;
 use crate::ship::map::Maps;
 use crate::ship::drops::DropTable;
 use crate::entity::character::SectionID;
 use crate::ship::monster::{load_monster_stats_table, MonsterType, MonsterStats};
 use crate::ship::map::area::MapAreaLookup;
-use thiserror::Error;
+use crate::ship::map::enemy::RareMonsterAppearTable;
 
 #[derive(Debug, Error)]
 #[error("")]
@@ -168,6 +170,7 @@ pub struct RoomState {
     pub bursting: bool,
     pub monster_stats: Box<HashMap<MonsterType, MonsterStats>>,
     pub map_areas: MapAreaLookup,
+    pub rare_monster_table: Box<RareMonsterAppearTable>,
     // items on ground
     // enemy info
 }
@@ -232,13 +235,16 @@ impl RoomState {
             }
         };
 
+        let rare_monster_table = RareMonsterAppearTable::new(room_mode.episode());
+
         Ok(RoomState {
             monster_stats: Box::new(load_monster_stats_table(&room_mode).map_err(|_| RoomCreationError::CouldNotLoadMonsterStats(room_mode))?),
             mode: room_mode,
             random_seed: rand::thread_rng().gen(),
+            rare_monster_table: Box::new(rare_monster_table.clone()),
             name: String::from_utf16_lossy(&create_room.name).trim_matches(char::from(0)).into(),
             password: create_room.password,
-            maps: Maps::new(room_mode),
+            maps: Maps::new(room_mode, &rare_monster_table), // TODO: rare_monster_table here feels janky. is there some way to call the the RoomState.rare_monster_table we already created?
             section_id,
             drop_table: Box::new(DropTable::new(room_mode.episode(), room_mode.difficulty(), section_id)),
             bursting: false,

src/ship/ship.rs

@@ -195,6 +195,7 @@ pub enum SendShipPacket {
     DoneLoadingQuest(DoneLoadingQuest),
     BankItemList(BankItemList),
     RedirectClient(RedirectClient),
+    RareMonsterList(RareMonsterList),
     AcknowledgeTrade(AcknowledgeTrade),
     CancelTrade(CancelTrade),
     TradeSuccessful(TradeSuccessful),
@@ -235,6 +236,7 @@ impl SendServerPacket for SendShipPacket {
             SendShipPacket::DoneLoadingQuest(pkt) => pkt.as_bytes(),
             SendShipPacket::BankItemList(pkt) => pkt.as_bytes(),
             SendShipPacket::RedirectClient(pkt) => pkt.as_bytes(),
+            SendShipPacket::RareMonsterList(pkt) => pkt.as_bytes(),
             SendShipPacket::AcknowledgeTrade(pkt) => pkt.as_bytes(),
             SendShipPacket::CancelTrade(pkt) => pkt.as_bytes(),
             SendShipPacket::TradeSuccessful(pkt) => pkt.as_bytes(),
@@ -397,7 +399,6 @@ impl<EG: EntityGateway> ShipServerStateBuilder<EG> {
             ip: self.ip.unwrap_or_else(|| Ipv4Addr::new(127,0,0,1)),
             port: self.port.unwrap_or(SHIP_PORT),
             shops: Box::new(ItemShops::default()),
-
             blocks: Blocks(blocks),
 
             auth_token: self.auth_token.unwrap_or_else(|| AuthToken("".into())),
@@ -408,7 +409,6 @@ impl<EG: EntityGateway> ShipServerStateBuilder<EG> {
     }
 }
 
-
 pub struct Block {
     client_location: Box<ClientLocation>,
     pub rooms: Box<Rooms>,
@@ -623,7 +623,7 @@ impl<EG: EntityGateway> ServerState for ShipServerState<EG> {
             },
             RecvShipPacket::QuestMenuSelect(questmenuselect) => {
                 let block = self.blocks.with_client(id, &self.clients)?;
-                handler::quest::load_quest(id, questmenuselect, &self.quests, &mut self.clients, &block.client_location, &mut block.rooms)?
+                handler::quest::player_chose_quest(id, questmenuselect, &self.quests, &mut self.clients, &block.client_location, &mut block.rooms)?
             },
             RecvShipPacket::MenuDetail(_menudetail) => {
                 //unreachable!();

tests/test_rooms.rs

@@ -95,3 +95,23 @@ async fn test_item_ids_reset_when_rejoining_rooms() {
         _ => panic!(),
     }
 }
+
+#[async_std::test]
+async fn test_load_rare_monster_default_appear_rates() {
+    let mut entity_gateway = InMemoryGateway::default();
+    let (_user1, _char1) = new_user_character(&mut entity_gateway, "a1", "a").await;
+    let mut ship = Box::new(ShipServerState::builder()
+        .gateway(entity_gateway.clone())
+        .build());
+    log_in_char(&mut ship, ClientId(1), "a1", "a").await;
+    join_lobby(&mut ship, ClientId(1)).await;
+    create_room(&mut ship, ClientId(1), "room", "").await;
+    
+    // assume episode 1
+    let room = ship.blocks.0[0].rooms[0].as_ref().unwrap();
+    println!("rare monster table: {:?}", room.rare_monster_table);
+    let rates = &*room.rare_monster_table;
+    for (_monster, rate) in rates.clone().appear_rate {
+        assert_eq!(rate, 0.001953125f32); // 1/512 = 0.001953125
+    }
+}