Battle-for-Tismo/shared/data/units.js

// Unit archetypes. `military` units fight, capture cities and may enter an
// enemy military unit's tile. `attack` is the damage dealt per combat round and
// `defense` the damage absorbed per round; a defender's defense is doubled (the
// 100% defensive bonus). `range` is how many tiles away the unit can strike
// (1 is melee).

export const PROTO_UNITS = [
  {
    id: "modern_infantry",
    name: "Modern infantry",
    maxHp: 500,
    cost: 100_000_000,
    upkeep: 5000,
    moveable: true,
    speed: 0.5,
    military: true,
    // Marks the unit for the infantry research effects (weapons, body armour).
    infantry: true,
    attack: 100,
    defense: 40,
    range: 1,
    traversableTerrains: ["Land"],
    icon: "icon_modern_infantry.svg",
  },
  {
    id: "worker",
    name: "Worker",
    maxHp: 100,
    cost: 0,
    upkeep: 0,
    moveable: true,
    speed: 0.5,
    military: false,
    attack: 0,
    defense: 0,
    range: 1,
    traversableTerrains: ["Land"],
    icon: "icon_settler.svg",
  },
  {
    id: "artillery",
    name: "Artillery",
    maxHp: 400,
    cost: 300_000_000,
    upkeep: 12_000,
    moveable: true,
    speed: 0.25,
    military: true,
    // Marks the unit for the artillery research effect.
    artillery: true,
    attack: 250,
    // Barely armoured: nearly every hit gets through.
    defense: 5,
    // Outranges infantry, so melee units cannot strike back from two tiles.
    range: 2,
    traversableTerrains: ["Land"],
    icon: "icon_artillery.svg",
  },
  {
    id: "jet_fighter",
    name: "Jet fighter",
    maxHp: 300,
    cost: 400_000_000,
    upkeep: 20_000,
    moveable: true,
    speed: 5,
    military: true,
    attack: 300,
    defense: 20,
    range: 1,
    traversableTerrains: ["Land", "Sea", "Ice"],
    // Aircraft only operate near a friendly airport: `enduranceHours` is how
    // long they may stay aloft and `missionRange` the furthest they may be
    // ordered from home. Both are per-type so a future plane can differ. The
    // fighter's 10-tile reach needs 4 hours aloft for the round trip, leaving
    // an hour of reserve.
    air: true,
    enduranceHours: 5,
    missionRange: 40,
    requiresBuilding: "airport",
    icon: "icon_jet_fighter.svg",
  },
  {
    id: "bomber",
    name: "Bomber",
    maxHp: 350,
    cost: 500_000_000,
    upkeep: 25_000,
    moveable: true,
    speed: 5,
    military: true,
    attack: 450,
    defense: 10,
    // A bomber strikes from `range` tiles away and never joins the melee.
    range: 0,
    traversableTerrains: ["Land", "Sea", "Ice"],
    air: true,
    enduranceHours: 10,
    missionRange: 50,
    strike: true,
    requiresBuilding: "airport",
    icon: "icon_bomber.svg",
  },
  {
    id: "battleship",
    name: "Battleship",
    maxHp: 800,
    cost: 600_000_000,
    upkeep: 30_000,
    moveable: true,
    speed: 0.5,
    military: true,
    attack: 400,
    defense: 120,
    range: 2,
    naval: true,
    traversableTerrains: ["Sea"],
    requiresBuilding: "shipyard",
    icon: "icon_battleship.svg",
  },
  {
    id: "mobile_radar",
    name: "Mobile radar",
    maxHp: 200,
    cost: 50_000_000,
    upkeep: 5000,
    moveable: true,
    speed: 0.5,
    military: false,
    attack: 0,
    defense: 0,
    range: 0,
    // Watches four tiles out, cannot fight, is taken by any unit that walks
    // onto it, and a lone one is destroyed outright by a single ranged hit.
    vision: 4,
    capturable: true,
    destroyedByRangedAlone: true,
    traversableTerrains: ["Land"],
    icon: "icon_radar.svg",
  },
  {
    id: "launch",
    name: "Launch",
    maxHp: 150,
    cost: 20_000_000,
    upkeep: 2000,
    moveable: true,
    speed: 0.5,
    military: false,
    attack: 0,
    defense: 0,
    range: 0,
    // Transports one infantry unit and is defenceless on its own.
    transportCapacity: 1,
    transportKind: "infantry",
    capturable: true,
    naval: true,
    traversableTerrains: ["Sea"],
    requiresBuilding: "port",
    icon: "icon_launch.svg",
  },
];

// Only units in this list can be trained from the city screen.
export const TRAINABLE_UNIT_IDS = [
  "modern_infantry",
  "artillery",
  "jet_fighter",
  "bomber",
  "battleship",
  "mobile_radar",
  "launch",
];

export function protoUnitById(id) {
  return PROTO_UNITS.find((u) => u.id === id) || null;
}