Silver, ruby and diamond veins; treasury shows its treasures; announced payday

- New veins (appended kinds): silver (common), ruby (rare), diamond (very rare, far from the core);
  treasure caves contain gems; each treasure is worth a different amount per strike and per vein
- Imps carry one kind of treasure at a time
- Treasury tiles hold up to 500 each and show gold coins, silver bars, rubies or diamonds;
  spending empties random treasury tiles, the soul core keeps what does not fit
- Training no longer drains gold continuously: it is billed on the next payday
- Payday is announced 20 s before (message with the cost); the HUD shows a payday countdown and
  the cost of the next payday in red next to the gold counter
- Tests for the treasury and the payday bill

Co-Authored-By: Claude Opus 5.5 <noreply@anthropic.com>

lang/de.lang

@@ -180,7 +180,7 @@ tile.rock = Fels
 tile.indestructible = unzerstörbar
 tile.earth = Erde
 tile.gold = Goldader
-tile.gold_amount = {0} Gold
+tile.gold_amount = Wert: {0} Gold
 tile.floor = Boden
 owner.player = erobert
 owner.hero = Heldengebiet
@@ -401,3 +401,16 @@ tile.bridge = Holzbrücke
 tile.lavabridge = Steinbrücke
 tile.shard = Splitter deines Seelenkerns
 tile.shard_info = Erobere diese Kammer, um den Splitter zurückzuholen.
+
+# treasures and payday
+tile.silver = Silberader
+tile.ruby = Rubinader
+tile.diamond = Diamantader
+res.gold = Gold
+res.silver = Silber
+res.ruby = Rubinen
+res.diamond = Diamanten
+treasury.content = Enthält {0} in {1}
+hud.payday = Zahltag
+msg.payday_soon = Zahltag in {0} Sekunden: Deine Kreaturen wollen {1} Gold.
+hint.payday_short = Für den nächsten Zahltag reicht das Gold nicht. Unbezahlte Kreaturen werden wütend!

lang/en.lang

@@ -181,7 +181,7 @@ tile.rock = Rock
 tile.indestructible = indestructible
 tile.earth = Earth
 tile.gold = Gold Vein
-tile.gold_amount = {0} gold
+tile.gold_amount = Worth {0} gold
 tile.floor = Floor
 owner.player = claimed
 owner.hero = hero territory
@@ -402,3 +402,16 @@ tile.bridge = Wooden bridge
 tile.lavabridge = Stone bridge
 tile.shard = Shard of your soul core
 tile.shard_info = Claim this chamber to take the shard back.
+
+# treasures and payday
+tile.silver = Silver vein
+tile.ruby = Ruby vein
+tile.diamond = Diamond vein
+res.gold = gold
+res.silver = silver
+res.ruby = rubies
+res.diamond = diamonds
+treasury.content = Holds {0} worth of {1}
+hud.payday = Payday
+msg.payday_soon = Payday in {0} seconds: your creatures want {1} gold.
+hint.payday_short = There is not enough gold for the coming payday. Unpaid creatures get angry!

src/game.rs

@@ -6,6 +6,10 @@ use serde::{Deserialize, Serialize};
 pub const CORE_HP: f32 = 2000.0;
 pub const GATE_HP: f32 = 3000.0;
 pub const PAYDAY: f32 = 150.0;
+pub const PAYDAY_WARN: f32 = 20.0; // the payday is announced this many seconds before
+pub const TREASURY_TILE: f32 = 500.0; // value one treasury tile holds
+pub const CORE_STORE: f32 = 2000.0; // value the soul core holds without any treasury
+pub const TRAIN_COST: f32 = 1.5; // gold per second of training (billed on payday)
 pub const FIRST_WAVE: f32 = 300.0;
 pub const WAVE_GAP: f32 = 180.0;
 pub const MAX_SQUAD: usize = 18;
@@ -169,6 +173,8 @@ pub struct Ent {
     pub think: f32,
     pub repath: f32,
     pub carry: i32,
+    #[serde(default)]
+    pub carry_res: u8, // treasure the imp carries (see map::RES_GOLD)
     pub hunger: f32,
     pub energy: f32,
     pub happy: f32,
@@ -220,6 +226,7 @@ impl Ent {
             think: 0.0,
             repath: 0.0,
             carry: 0,
+            carry_res: 0,
             hunger: 0.0,
             energy: 1.0,
             happy: 1.0,
@@ -311,6 +318,14 @@ pub struct Game {
     pub entry_history: Vec<(i32, i32)>, // entry points of recent waves
     #[serde(default)]
     pub planned_entries: Vec<(i32, i32)>, // entry points of the coming/current wave (minimap)
+    #[serde(default)]
+    pub reserve: f32, // value stored in the soul core (the rest lies in the treasury tiles)
+    #[serde(skip)]
+    pub incoming: Vec<(u8, f32)>, // treasures added since the last treasury update
+    #[serde(default)]
+    pub training_bill: f32, // training costs, paid on the next payday
+    #[serde(default)]
+    pub payday_warned: bool,
     #[serde(skip)]
     pub hints: bool, // show hint messages (setting)
     #[serde(skip, default = "hint_times")]
@@ -407,6 +422,10 @@ impl Game {
             planned_entries: Vec::new(),
             hints: true,
             hint_t: hint_times(),
+            reserve: 0.0,
+            incoming: Vec::new(),
+            training_bill: 0.0,
+            payday_warned: false,
         };
         let (cx, cy) = g.map.core;
         // the soul core starts surrounded by a one tile wide ring of treasury
@@ -533,16 +552,97 @@ impl Game {
     }
 
     pub fn gold_cap(&self) -> f32 {
-        2000.0 + 500.0 * self.counts[0] as f32
+        CORE_STORE + TREASURY_TILE * self.counts[0] as f32
     }
 
     pub fn add_gold(&mut self, amount: f32) -> f32 {
+        self.add_res(amount, RES_GOLD)
+    }
+
+    // adds treasure of one kind (as far as there is room); returns the value accepted
+    pub fn add_res(&mut self, amount: f32, res: u8) -> f32 {
         let cap = self.gold_cap();
         let acc = amount.min((cap - self.gold).max(0.0));
         self.gold += acc;
+        if acc > 0.0 {
+            self.incoming.push((res, acc));
+        }
         acc
     }
 
+    // what the next payday costs: wages of all creatures plus the training bill
+    pub fn next_payday_cost(&self) -> f32 {
+        let wages: f32 = self.ents.iter().filter(|e| e.alive && e.creature()).map(|e| st(e.kind).wage as f32 * (1.0 + 0.1 * (e.level - 1) as f32)).sum();
+        wages + self.training_bill
+    }
+
+    // The gold counter is the truth; the treasury tiles show where it lies. Added treasure fills
+    // tiles of the same kind first, then empty ones, the rest goes into the core. Spending takes
+    // from random treasury tiles first, then from the core.
+    pub fn sync_treasury(&mut self) {
+        let mut tiles = Vec::new();
+        let mut stored = 0.0;
+        for i in 0..self.map.t.len() {
+            let t = &mut self.map.t[i];
+            if t.kind == Kind::Treasury && t.owner == Owner::Player {
+                tiles.push(i);
+                stored += t.gold as f32;
+            } else if t.gold != 0 && t.vein().is_none() && t.kind != Kind::Treasury {
+                t.gold = 0; // a sold treasury tile loses its content
+                t.res = 0;
+            }
+        }
+        let diff = self.gold - (self.reserve + stored);
+        let incoming = std::mem::take(&mut self.incoming);
+        if diff < -0.5 {
+            let mut need = -diff;
+            while need > 0.5 {
+                let full: Vec<usize> = tiles.iter().copied().filter(|&i| self.map.t[i].gold > 0).collect();
+                if full.is_empty() {
+                    break;
+                }
+                let i = full[(self.rng.next() as usize) % full.len()];
+                let t = &mut self.map.t[i];
+                let take = (t.gold as f32).min(need.ceil());
+                t.gold -= take as i32;
+                need -= take;
+            }
+            self.reserve = (self.reserve - need.max(0.0)).max(0.0);
+        } else if diff > 0.5 {
+            let mut left = diff;
+            let mut parts: Vec<(u8, f32)> = incoming;
+            let typed: f32 = parts.iter().map(|p| p.1).sum();
+            if typed < left {
+                parts.push((RES_GOLD, left - typed));
+            }
+            for (res, amount) in parts {
+                let mut a = amount.min(left);
+                left -= a;
+                // tiles holding this treasure first, then empty tiles
+                for pass in 0..2 {
+                    for &i in &tiles {
+                        if a <= 0.5 {
+                            break;
+                        }
+                        let t = &mut self.map.t[i];
+                        let fits = if pass == 0 { t.gold > 0 && t.res == res } else { t.gold <= 0 };
+                        if !fits {
+                            continue;
+                        }
+                        let room = TREASURY_TILE - t.gold as f32;
+                        let put = a.min(room).floor();
+                        if put >= 1.0 {
+                            t.gold += put as i32;
+                            t.res = res;
+                            a -= put;
+                        }
+                    }
+                }
+                self.reserve += a.max(0.0);
+            }
+        }
+    }
+
     pub fn portals_owned(&self) -> usize {
         (0..self.map.portals.len()).filter(|&k| self.map.portal_owned(k)).count()
     }
@@ -624,6 +724,7 @@ impl Game {
         if self.state == 0 && !self.paused {
             self.step(dt);
         }
+        self.sync_treasury();
         for f in self.fx.iter_mut() {
             f.t += dt;
         }
@@ -651,8 +752,20 @@ impl Game {
         }
 
         self.payday -= dt;
+        if !self.payday_warned && self.payday <= PAYDAY_WARN {
+            self.payday_warned = true;
+            let cost = self.next_payday_cost();
+            if cost >= 1.0 {
+                self.msg("msg.payday_soon", vec![(self.payday.ceil() as i32).to_string(), (cost.ceil() as i32).to_string()]);
+                self.sfx_ui(Sfx::FlagSet);
+                if cost > self.gold {
+                    self.hint(22, "hint.payday_short");
+                }
+            }
+        }
         if self.payday <= 0.0 {
             self.payday = PAYDAY;
+            self.payday_warned = false;
             self.do_payday();
         }
 
@@ -790,6 +903,11 @@ impl Game {
                 self.ents[i].happy -= 0.45;
             }
         }
+        // training costs collected since the last payday
+        let bill = self.training_bill.min(self.gold).max(0.0);
+        self.gold -= bill;
+        total += bill;
+        self.training_bill = 0.0;
         if paid + unpaid > 0 {
             self.sfx_ui(Sfx::Payday);
             if unpaid > 0 {
@@ -1532,6 +1650,13 @@ impl Game {
                     e.job = Job::None;
                     return;
                 }
+                // an imp carries one kind of treasure: other loads are delivered first
+                if tile.vein().map_or(false, |r| e.carry > 0 && r != e.carry_res) {
+                    self.unreserve(me);
+                    e.job = Job::None;
+                    self.start_deliver(e);
+                    return;
+                }
                 let (tx, ty) = xy(t);
                 e.face = sgn(tx as f32 + 0.5 - e.x);
                 e.working = true;
@@ -1542,10 +1667,11 @@ impl Game {
                     let fxy = (e.y + ty as f32 + 0.5) * 0.5;
                     let tl = &mut self.map.t[t];
                     let done;
-                    if tl.kind == Kind::Gold {
+                    if let Some(res) = tl.vein() {
-                        let take = tl.gold.min(25);
+                        let take = tl.gold.min(RES_STRIKE[res as usize]);
                         tl.gold -= take;
                         e.carry += take;
+                        e.carry_res = res;
                         done = tl.gold <= 0;
                         self.fx(5, fxx, fxy, 0.0, 0.0, 0.5, 0xff30d0ff);
                         self.sfx(Sfx::GoldDig, fxx, fxy);
@@ -1644,7 +1770,7 @@ impl Game {
             Job::Deliver => {
                 if self.is_deposit(cur) {
                     let amount = e.carry as f32;
-                    let got = self.add_gold(amount);
+                    let got = self.add_res(amount, e.carry_res);
                     if got < amount {
                         self.hint(3, "hint.treasury_full");
                     }
@@ -1859,13 +1985,14 @@ impl Game {
                 }
             }
             Job::Train(t) => {
-                if cur != t || self.map.t[t].kind != Kind::Training || self.gold < 1.0 {
+                // training is billed on payday; it stops when the bill would exceed the gold
+                if cur != t || self.map.t[t].kind != Kind::Training || self.training_bill + 1.0 > self.gold {
                     self.unreserve(me);
                     e.job = Job::None;
                     return;
                 }
                 e.working = true;
-                self.gold -= 1.5 * dt;
+                self.training_bill += TRAIN_COST * dt;
                 e.xp += 7.0 * dt;
                 e.timer -= dt;
                 if e.timer <= 0.0 {
@@ -3359,6 +3486,51 @@ mod tests {
         assert_eq!(g.map.hero_cost()(idx(rx + 1, cy)), None);
     }
 
+    fn treasury_total(g: &Game) -> f32 {
+        g.reserve + g.map.t.iter().filter(|t| t.kind == Kind::Treasury && t.owner == Owner::Player).map(|t| t.gold as f32).sum::<f32>()
+    }
+
+    #[test]
+    fn treasury_shows_its_treasures() {
+        let mut g = Game::new(3, 64, 64);
+        g.update(0.01);
+        // the starting gold lies in the treasury ring
+        assert!((treasury_total(&g) - g.gold).abs() < 2.0);
+        assert_eq!(g.reserve, 0.0);
+        // rubies fill their own tiles
+        g.add_res(1200.0, 2);
+        g.update(0.01);
+        let rubies: i32 = g.map.t.iter().filter(|t| t.kind == Kind::Treasury && t.res == 2).map(|t| t.gold).sum();
+        assert_eq!(rubies, 1200);
+        assert!(g.map.t.iter().all(|t| t.gold <= TREASURY_TILE as i32 || t.vein().is_some()));
+        // spending empties tiles (randomly), the total always matches the gold counter
+        g.gold -= 1700.0;
+        g.update(0.01);
+        assert!((treasury_total(&g) - g.gold).abs() < 2.0);
+        // more than the treasury holds: the core keeps the rest
+        g.gold = g.gold_cap();
+        g.update(0.01);
+        assert!((treasury_total(&g) - g.gold).abs() < 2.0);
+        assert!(g.reserve > 0.0 && g.reserve <= CORE_STORE + 1.0);
+    }
+
+    #[test]
+    fn training_is_billed_on_payday() {
+        let mut g = Game::new(3, 64, 64);
+        g.spawn(EK::Kobold, false, 10.0, 10.0, 1);
+        g.training_bill = 50.0;
+        let cost = g.next_payday_cost();
+        assert_eq!(cost, 50.0 + st(EK::Kobold).wage as f32);
+        let gold = g.gold;
+        g.payday = PAYDAY_WARN + 0.05;
+        g.update(0.1);
+        assert!(g.payday_warned);
+        g.payday = 0.01;
+        g.update(0.1);
+        assert_eq!(g.training_bill, 0.0);
+        assert!((gold - g.gold - cost).abs() < 1.0);
+    }
+
     #[test]
     fn some_imps_always_claim() {
         // lots of digging work: still at least 10% (min. one) of the imps claim the dug-out floor

src/gfx.rs

@@ -6,7 +6,7 @@ use macroquad::prelude::*;
 
 pub const CELL: f32 = 16.0;
 const ATLAS_COLS: u32 = 16;
-const ATLAS_ROWS: u32 = 8;
+const ATLAS_ROWS: u32 = 9;
 
 // atlas indices (4 variants each)
 pub const T_ROCK: u32 = 0;
@@ -56,6 +56,12 @@ pub const T_FORTWALL: u32 = 108; // 4 variants: knight fortress masonry
 pub const D_SHARD: u32 = 112; // shard of the soul core
 pub const D_BANNER: u32 = 113; // knight banner
 pub const I_BRIDGE: u32 = 114;
+pub const T_SILVER: u32 = 115; // 2 variants each: veins in the earth
+pub const T_RUBY: u32 = 117;
+pub const T_DIAMOND: u32 = 119;
+pub const D_SILVER: u32 = 121; // treasury content
+pub const D_RUBY: u32 = 122;
+pub const D_DIAMOND: u32 = 123;
 
 pub struct Gfx {
     pub atlas: Texture2D,
@@ -643,6 +649,58 @@ fn gen_atlas() -> Image {
             None
         }
     });
+    // ---- more treasures: veins (earth with embedded pieces) and treasury piles
+    let vein = |x: i32, y: i32, v: u32, seed: u32, hi: Color, mid: Color, lo: Color, size: f32| -> Color {
+        let mut best = 99.0f32;
+        for k in 0..5 {
+            let nx = 2 + (hash(k, 1, v + seed) % 12) as i32;
+            let ny = 2 + (hash(k, 2, v + seed) % 12) as i32;
+            best = best.min((((x - nx).abs() + (y - ny).abs()) as f32) - if k % 2 == 0 { 0.5 } else { 0.0 });
+        }
+        if best < size * 0.4 {
+            hi
+        } else if best < size {
+            mid
+        } else if best < size + 0.8 {
+            lo
+        } else {
+            earth_px(x, y, v + seed)
+        }
+    };
+    for v in 0..2u32 {
+        cv.cell(T_SILVER + v, |x, y| Some(vein(x, y, v, 170, c(245, 245, 255), c(180, 186, 200), c(100, 104, 118), 2.0)));
+        cv.cell(T_RUBY + v, |x, y| Some(vein(x, y, v, 180, c(255, 150, 170), c(210, 30, 60), c(110, 16, 36), 1.6)));
+        cv.cell(T_DIAMOND + v, |x, y| Some(vein(x, y, v, 190, c(255, 255, 255), c(150, 230, 255), c(70, 140, 190), 1.4)));
+    }
+    // treasury heaps, same dome shape as the gold pile: silver bars, rubies, diamonds
+    let heap = |x: i32, y: i32| -> Option<f32> {
+        let dx = (x as f32 - 7.5) / 7.0;
+        let dy = (y as f32 - 11.0) / 5.0;
+        let d = dx * dx + dy * dy;
+        if d < 1.0 && y <= 14 {
+            Some(d)
+        } else {
+            None
+        }
+    };
+    cv.cell(D_SILVER, |x, y| {
+        let d = heap(x, y)?;
+        // bars: 4 px wide bricks in rows of 2
+        let row = y / 2;
+        let off = if row % 2 == 1 { 2 } else { 0 };
+        Some(if y % 2 == 0 { c(240, 242, 250) } else if (x + off) % 4 == 0 { c(110, 114, 128) } else if d > 0.6 { c(150, 156, 172) } else { c(196, 200, 216) })
+    });
+    let gems = |x: i32, y: i32, seed: u32, hi: Color, mid: Color, lo: Color| -> Option<Color> {
+        let d = heap(x, y)?;
+        // facetted stones: diamond shaped cells of 4 px
+        let (u, v) = (x + y, x - y + 16);
+        let (cu, cv) = (u / 4, v / 4);
+        let e = (u % 4 == 0) || (v % 4 == 0);
+        let h = hash(cu, cv, seed) % 3;
+        Some(if e { lo } else if h == 0 || (u % 4 == 1 && v % 4 == 1) { hi } else if d > 0.65 { lo } else { mid })
+    };
+    cv.cell(D_RUBY, |x, y| gems(x, y, 200, c(255, 150, 170), c(215, 30, 60), c(120, 12, 36)));
+    cv.cell(D_DIAMOND, |x, y| gems(x, y, 210, c(255, 255, 255), c(170, 232, 255), c(80, 150, 200)));
     cv.img
 }
 
@@ -1010,6 +1068,9 @@ impl Gfx {
             Kind::Earth if reinforced => T_REINF + v,
             Kind::Earth => T_EARTH + v,
             Kind::Gold => T_GOLD + v,
+            Kind::Silver => T_SILVER + (v & 1),
+            Kind::Ruby => T_RUBY + (v & 1),
+            Kind::Diamond => T_DIAMOND + (v & 1),
             Kind::Floor => {
                 if claimed {
                     T_CLAIM + v

src/map.rs

@@ -54,10 +54,13 @@ pub enum Kind {
     Bridge,     // wooden bridge over water (walkable)
     LavaBridge, // stone bridge over lava (walkable)
     Shard,      // floor with a shard of the soul core (campaign)
+    Silver,     // silver vein: common, little value
+    Ruby,       // ruby vein: rare, valuable
+    Diamond,    // diamond vein: very rare, very valuable
 }
 
 // order matters for the packed savegame codec: only append new kinds
-const KINDS: [Kind; 20] = [
+const KINDS: [Kind; 23] = [
     Kind::Rock,
     Kind::Earth,
     Kind::Gold,
@@ -78,8 +81,16 @@ const KINDS: [Kind; 20] = [
     Kind::Bridge,
     Kind::LavaBridge,
     Kind::Shard,
+    Kind::Silver,
+    Kind::Ruby,
+    Kind::Diamond,
 ];
 
+// treasures (veins, treasury content, imp loads): 0 gold, 1 silver, 2 ruby, 3 diamond
+pub const RES_GOLD: u8 = 0;
+// value taken per pick strike for each treasure
+pub const RES_STRIKE: [i32; 4] = [25, 20, 40, 60];
+
 #[derive(Clone, Copy, PartialEq, Eq, Debug, Serialize, Deserialize)]
 pub enum Owner {
     None,
@@ -112,17 +123,29 @@ pub struct Tile {
     pub var: u8, // texture variant
     #[serde(rename = "rf", default)]
     pub reinforced: bool, // wall reinforced by imps
+    #[serde(rename = "rs", default)]
+    pub res: u8, // treasury: kind of treasure stored here (see RES_GOLD)
 }
 
 impl Tile {
     pub fn new(kind: Kind) -> Tile {
-        Tile { kind, owner: Owner::None, hp: 0.0, gold: 0, marked: false, reserved: 0, food: 0.0, bed: 0, var: 0, reinforced: false }
+        Tile { kind, owner: Owner::None, hp: 0.0, gold: 0, marked: false, reserved: 0, food: 0.0, bed: 0, var: 0, reinforced: false, res: 0 }
     }
     pub fn solid(&self) -> bool {
-        matches!(self.kind, Kind::Rock | Kind::Earth | Kind::Gold)
+        matches!(self.kind, Kind::Rock | Kind::Earth | Kind::Gold | Kind::Silver | Kind::Ruby | Kind::Diamond)
     }
     pub fn diggable(&self) -> bool {
-        matches!(self.kind, Kind::Earth | Kind::Gold)
+        matches!(self.kind, Kind::Earth | Kind::Gold | Kind::Silver | Kind::Ruby | Kind::Diamond)
+    }
+    // the treasure of a vein (None for everything else)
+    pub fn vein(&self) -> Option<u8> {
+        match self.kind {
+            Kind::Gold => Some(0),
+            Kind::Silver => Some(1),
+            Kind::Ruby => Some(2),
+            Kind::Diamond => Some(3),
+            _ => None,
+        }
     }
     pub fn walkable(&self) -> bool {
         matches!(
@@ -329,7 +352,7 @@ impl Map {
                     if d <= (r as f32 + 0.5).powi(2) - rng.f() * r as f32 {
                         let tl = &mut t[y as usize * w + x as usize];
                         tl.kind = k;
-                        if k == Kind::Gold {
+                        if tl.vein().is_some() {
                             tl.gold = rng.range(gold.0, gold.1);
                         }
                     }
@@ -346,6 +369,21 @@ impl Map {
             let r = rng.range(1, 2);
             blob(&mut t, &mut rng, cx, cy, r, Kind::Gold, (250, 550));
         }
+        // more treasures: silver is common, rubies are rare, diamonds very rare and far away
+        for _ in 0..scale(7.0) {
+            let (cx, cy) = (rng.range(4, wi - 5), rng.range(4, hi - 5));
+            let r = rng.range(1, 2);
+            blob(&mut t, &mut rng, cx, cy, r, Kind::Silver, (200, 400));
+        }
+        for _ in 0..scale(3.0) {
+            let (cx, cy) = (rng.range(wi / 4, wi - 5), rng.range(4, hi - 5));
+            blob(&mut t, &mut rng, cx, cy, 1, Kind::Ruby, (500, 800));
+        }
+        for _ in 0..scale(1.2).max(1) {
+            let (cx, cy) = (rng.range(wi / 3, wi - 5), rng.range(4, hi - 5));
+            let r = rng.range(0, 1);
+            blob(&mut t, &mut rng, cx, cy, r, Kind::Diamond, (1000, 1500));
+        }
         // guaranteed gold near the start
         for k in 0..3 {
             let cx = core.0 + rng.range(-3, 9);
@@ -374,6 +412,22 @@ impl Map {
         // treasure caves: a cave surrounded by very rich gold veins (guarded by heroes, see Game::new)
         for &(cx, cy) in &treasures {
             blob(&mut t, &mut rng, cx, cy, 4, Kind::Gold, (1000, 1600));
+            // some of the riches are gems
+            for y in cy - 4..=cy + 4 {
+                for x in cx - 4..=cx + 4 {
+                    if inner(x, y) && t[y as usize * w + x as usize].kind == Kind::Gold {
+                        let r = rng.f();
+                        let tl = &mut t[y as usize * w + x as usize];
+                        if r < 0.08 {
+                            tl.kind = Kind::Diamond;
+                            tl.gold = rng.range(1200, 1800);
+                        } else if r < 0.3 {
+                            tl.kind = Kind::Ruby;
+                            tl.gold = rng.range(800, 1200);
+                        }
+                    }
+                }
+            }
             room(&mut t, cx - 2, cy - 2, cx + 2, cy + 2, Owner::None);
         }
         // starting area and core
@@ -404,7 +458,7 @@ impl Map {
             }
         }
         for tl in t.iter_mut() {
-            if tl.kind == Kind::Gold {
+            if tl.vein().is_some() {
                 tl.hp = 6.0;
             }
         }
@@ -477,7 +531,7 @@ impl Map {
             match tl.kind {
                 Kind::Earth if tl.reinforced => Some(70),
                 Kind::Earth => Some(7),
-                Kind::Gold => Some(12),
+                Kind::Gold | Kind::Silver | Kind::Ruby | Kind::Diamond => Some(12),
                 Kind::Rock | Kind::Core | Kind::Tower | Kind::Water | Kind::Lava => None,
                 _ => Some(1),
             }
@@ -552,7 +606,7 @@ fn tile_record(t: &Tile) -> [u8; REC] {
     let mut r = [0u8; REC];
     r[0] = KINDS.iter().position(|&k| k == t.kind).unwrap_or(0) as u8;
     r[1] = OWNERS.iter().position(|&o| o == t.owner).unwrap_or(0) as u8;
-    r[2] = t.marked as u8 | (t.reinforced as u8) << 1;
+    r[2] = t.marked as u8 | (t.reinforced as u8) << 1 | (t.res & 3) << 2;
     r[3..7].copy_from_slice(&t.hp.to_le_bytes());
     r[7..11].copy_from_slice(&t.gold.to_le_bytes());
     r[11..15].copy_from_slice(&t.food.to_le_bytes());
@@ -616,6 +670,7 @@ fn tiles_de<'de, D: Deserializer<'de>>(d: D) -> Result<Vec<Tile>, D::Error> {
                     owner: *OWNERS.get(r[1] as usize).unwrap_or(&Owner::None),
                     marked: r[2] & 1 != 0,
                     reinforced: r[2] & 2 != 0,
+                    res: (r[2] >> 2) & 3,
                     hp: f32::from_le_bytes(f(3)),
                     gold: i32::from_le_bytes(f(7)),
                     food: f32::from_le_bytes(f(11)),

src/render3d.rs

@@ -14,7 +14,7 @@ pub const WALL_H: f32 = 0.95;
 const CHUNK: i32 = 16;
 pub const MAX_LIGHTS: usize = 24;
 const ATLAS_W: f32 = 256.0;
-const ATLAS_H: f32 = 128.0;
+const ATLAS_H: f32 = 144.0;
 const DISP_AMP: f32 = 0.11; // wall surface irregularity
 
 // ------------------------------------------------------------------ camera
@@ -480,7 +480,7 @@ fn block_shell(mk: &mut MB, map: &Map, x: i32, z: i32, n: usize, fill: [u8; 4],
     }
 }
 
-fn build_chunk(map: &Map, amb: &[f32], cx: i32, cz: i32, gold_fill: f32, atlas: &Texture2D, wall_sub: usize) -> [Option<Mesh>; 4] {
+fn build_chunk(map: &Map, amb: &[f32], cx: i32, cz: i32, atlas: &Texture2D, wall_sub: usize) -> [Option<Mesh>; 4] {
     let mut mb = MB::new();
     let ov = MB::new(); // textured overlays (currently unused)
     let mut ln = MB::new();
@@ -609,9 +609,12 @@ fn build_chunk(map: &Map, amb: &[f32], cx: i32, cz: i32, gold_fill: f32, atlas:
                     Kind::Library if z % 2 == 0 => mb.cross(xf + 0.5, zf + 0.5, 0.9, 0.85, D_SHELF, dc),
                     Kind::Torture if (x + z) % 2 == 1 => mb.cross(xf + 0.5, zf + 0.5, 0.8, 0.8, D_RACK, dc),
                     Kind::Temple if x % 3 == 1 && z % 3 == 1 => mb.cross(xf + 0.5, zf + 0.5, 0.8, 0.8, D_ALTAR, dc),
-                    Kind::Treasury if gold_fill > 0.02 => {
+                    // each treasury tile shows what it holds (up to TREASURY_TILE)
-                        let s = 0.35 + 0.55 * gold_fill;
+                    Kind::Treasury if t.gold > 10 => {
-                        mb.cross(xf + 0.5, zf + 0.5, s, s * 0.8, D_COINS, dc);
+                        let fill = (t.gold as f32 / TREASURY_TILE).clamp(0.0, 1.0);
+                        let s = 0.35 + 0.55 * fill;
+                        let sprite = [D_COINS, D_SILVER, D_RUBY, D_DIAMOND][(t.res & 3) as usize];
+                        mb.cross(xf + 0.5, zf + 0.5, s, s * 0.8, sprite, dc);
                     }
                     _ => {}
                 }
@@ -763,7 +766,7 @@ fn rgba(u: u32) -> Color {
     Color::from_rgba(u as u8, (u >> 8) as u8, (u >> 16) as u8, (u >> 24) as u8)
 }
 
-fn chunk_sig(map: &Map, cx: i32, cz: i32, fill_bucket: u8) -> u64 {
+fn chunk_sig(map: &Map, cx: i32, cz: i32) -> u64 {
     let mut h: u64 = 1469598103934665603;
     for z in cz * CHUNK - 3..(cz + 1) * CHUNK + 3 {
         for x in cx * CHUNK - 3..(cx + 1) * CHUNK + 3 {
@@ -771,7 +774,7 @@ fn chunk_sig(map: &Map, cx: i32, cz: i32, fill_bucket: u8) -> u64 {
                 Some(t) => {
                     let extra = match t.kind {
                         Kind::Farm => t.food as u64,
-                        Kind::Treasury => fill_bucket as u64,
+                        Kind::Treasury => (t.gold / 50) as u64 | (t.res as u64) << 5,
                         _ => 0,
                     };
                     (t.kind as u64) | (t.owner as u64) << 5 | (t.marked as u64) << 7 | (t.reinforced as u64) << 8 | extra << 9
@@ -817,19 +820,17 @@ impl R3d {
     // Rebuilds visible chunks whose content changed (off-screen chunks are updated when they appear)
     fn update_chunks(&mut self, g: &Game, gfx: &Gfx, m: &Mat4) {
         self.ensure_chunks();
-        let fill = (g.gold / g.gold_cap()).clamp(0.0, 1.0);
-        let bucket = (fill * 6.0) as u8;
         let mut amb: Option<Vec<f32>> = None;
         for cz in 0..self.ncz {
             for cx in 0..self.ncx {
                 if !Self::chunk_visible(m, cx, cz) {
                     continue;
                 }
-                let sig = chunk_sig(&g.map, cx, cz, bucket);
+                let sig = chunk_sig(&g.map, cx, cz);
                 let ch = &mut self.chunks[(cz * self.ncx + cx) as usize];
                 if ch.sig != sig {
                     let a = amb.get_or_insert_with(|| ambient_field(&g.map));
-                    let [m, o, l, k] = build_chunk(&g.map, a, cx, cz, bucket as f32 / 6.0, &gfx.atlas, self.wall_sub);
+                    let [m, o, l, k] = build_chunk(&g.map, a, cx, cz, &gfx.atlas, self.wall_sub);
                     ch.mesh = m;
                     ch.overlay = o;
                     ch.lines = l;
@@ -1525,6 +1526,9 @@ pub fn minimap_color(tile: &Tile) -> [u8; 4] {
         Kind::Earth if tile.reinforced => [120, 70, 70, 255],
         Kind::Earth => [86, 60, 40, 255],
         Kind::Gold => [220, 180, 50, 255],
+        Kind::Silver => [190, 195, 210, 255],
+        Kind::Ruby => [220, 40, 70, 255],
+        Kind::Diamond => [170, 235, 255, 255],
         Kind::Floor => match tile.owner {
             Owner::Player => [140, 60, 80, 255],
             Owner::Hero => [170, 175, 190, 255],

src/ui.rs

@@ -420,13 +420,21 @@ impl Ui {
         let wave_col = if g.wave_timer < 30.0 { RED } else { TXT };
         let vol = if settings.muted { tr("hud.off") } else { format!("{}%", (settings.volume * 100.0).round() as i32) };
         let mut segs: Vec<Vec<Part>> = vec![
-            vec![txt(tr("hud.gold"), GOLD), Part::Gap, txt(format!("{}/{}", g.gold as i32, g.gold_cap() as i32), TXT)],
+            vec![
+                txt(tr("hud.gold"), GOLD),
+                Part::Gap,
+                txt(format!("{}/{}", g.gold as i32, g.gold_cap() as i32), TXT),
+                Part::Gap,
+                // what the next payday costs, in red
+                txt(format!("-{}", g.next_payday_cost().ceil() as i32), RED),
+            ],
             vec![txt(tr("hud.mana"), MANA), Part::Gap, Part::Bar(g.mana / MANA_MAX, MANA), Part::Gap, txt(format!("{:<3}", g.mana as i32), TXT)],
             vec![txt(tr("hud.core"), RED), Part::Gap, Part::Bar(g.core_hp / CORE_HP, RED)],
             vec![txt(tr("hud.gate"), BLUE), Part::Gap, Part::Bar(g.gate_hp / GATE_HP, BLUE)],
             vec![txt(tr("hud.creatures"), TXT), Part::Gap, txt(format!("{}/{}", g.creature_count(), cap), TXT)],
             vec![txt(tr("hud.workers"), TXT), Part::Gap, txt(g.worker_count().to_string(), TXT)],
             vec![txt(trf("hud.wave", &[(g.wave + 1).to_string()]), wave_col), Part::Gap, txt(mmss(g.wave_timer), TXT)],
+            vec![txt(tr("hud.payday"), if g.payday <= PAYDAY_WARN { RED } else { GOLD }), Part::Gap, txt(mmss(g.payday), TXT)],
             vec![txt(tr("hud.army"), TXT), Part::Gap, txt((g.army_value() as i32).to_string(), TXT)],
         ];
         if !g.hand.is_empty() {
@@ -970,8 +978,9 @@ pub fn hover_info(g: &Game, ent: Option<usize>, tile: Option<(i32, i32)>) -> Vec
             out.push((tr("tile.reinforced_info"), DIM));
         }
         Kind::Earth => out.push((tr("tile.earth"), FRAME_HI)),
-        Kind::Gold => {
+        Kind::Gold | Kind::Silver | Kind::Ruby | Kind::Diamond => {
-            out.push((tr("tile.gold"), GOLD));
+            let key = ["tile.gold", "tile.silver", "tile.ruby", "tile.diamond"][t.vein().unwrap_or(0) as usize];
+            out.push((tr(key), GOLD));
             out.push((trf("tile.gold_amount", &[t.gold.to_string()]), GOLD));
         }
         Kind::Floor => {
@@ -1021,6 +1030,10 @@ pub fn hover_info(g: &Game, ent: Option<usize>, tile: Option<(i32, i32)>) -> Vec
                 out.push((tr(ROOM_NAMES[r]), FRAME_HI));
                 match k {
                     Kind::Farm => out.push((trf("farm.food", &[(t.food as i32).to_string()]), GREEN)),
+                    Kind::Treasury if t.gold > 0 => {
+                        let what = ["res.gold", "res.silver", "res.ruby", "res.diamond"][(t.res & 3) as usize];
+                        out.push((trf("treasury.content", &[t.gold.to_string(), tr(what)]), GOLD));
+                    }
                     Kind::Lair => out.push((tr(if t.bed != 0 { "lair.taken" } else { "lair.free" }), DIM)),
                     Kind::Torture => {
                         let used = g.ents.iter().filter(|e| e.alive && e.hero && e.captive != 0).count();