+++ /dev/null
-# Starship Fights
-
-## Phases of Battle
-
-Each turn consists of several phases. Each player takes their turn simultaneously.
-
-### Power Phase
-
-Distribute power among the ship's subsystems:
-
-* Weapons - Used to attack other ships
-* Shields - Used to defend against attacks
-* Impulse - Used to move around in space
-* Emitter - Used for special abilities
-
-Power starts off as being evenly split between all four subsystems. The ship's Grid Efficiency
-is how many Power Output (PO) points can be transferred between subsystems in any given Power Phase. Once the
-phase ends, the power distribution stays like it is until it is modified again, i.e. it never automatically
-resets back to the default evenly-shared distribution.
-
-Different ship tiers have different total amounts of power, as well as a certain Grid Efficiency:
-
-1. Escort: 8 PO, 1 GE
-2. *Frigate* (Vestigium only): 12 PO, 1 GE
-3. Destroyer: 12 PO, 2 GE
-4. Cruiser: 16 PO, 3 GE
-5. *Line Ship* (Vestigium only): 20 PO, 3 GE
-6. Battlecruiser: 16 PO, 4 GE
-7. *Heavy Cruiser* (Isarnareykk only): 24 PO, 3 GE
-8. Battleship: 24 PO, 4 GE
-9. *Dreadnought* (Vestigium only): 28 PO, 5 GE
-10. *Colossus* (Masra Draetsen only): 36 PO, 7 GE
-
-The effects that different power levels have is as follows:
-
-* Each unit of Weapon Power is consumed when a ship fires a weapon or charges a Lance battery
- * Weapon power is replenished completely after the End phase ends
-* Each unit of Shield Power is consumed when a ship's shields block an attack
- * Shield power is replenished after the End phase ends
- * Each Blast Marker the ship is touching has a 50% chance of reducing the replenished shield power by 1
-* Engine power modifies the ship's maximum acceleration
- * The normal Engine Power `e_0` is 25% of the total PO
- * The current Engine Power `e_1` is however many points the ship has put into its Engines
- * The movement speed factor is `η = sqrt(e_1 / e_0)`
- * The maximum distance moved during the Movement phase is `a_max = a_max_0 * η` where `a_max_0` is the default max movement
- * The maximum angle turned during the Movement phase is `α_max = α_max_0 * η`
-* Emitter power modifies the power of the ship's Emitter abilities
- * Similar factor: `μ = sqrt(m_1 / m_0)`
- * The reason why the `sqrt` function is used is to represent the diminishing returns of putting more power into a subsystem
-
-### Movement Phase
-
-Ships change their velocity during this phase. Velocity as a property of ships is persistent,
-being modified by the ship's acceleration which is decided during this phase.
-
-The way ships move is as follows, where ship's maximum acceleration is `a_max`, current position is `x_1`, previous position is `x_0`, and current ship facing is `θ`:
-
-1. Ship rotates a certain amount (up to maximum rotation) chosen by the player away from `θ`, this new facing angle is put into `φ`.
-2. A line is drawn starting at `x_1 + (x_1 - x_0)`, this point is put into `x_2`.
-3. The line traverses the vector `a_max * (î cos ((θ + φ) / 2) + ĵ sin ((θ + φ) / /2))` away from `x_2`
-4. The player chooses a point along this line for the ship to travel to, this point is put into `x_new`
-5. `x_1 -> x_0`, then `x_new -> x_1` and `φ -> θ`
-
-### Action Phase
-
-Ships call attacks against other ships during this phase,
-as well as defending themselves or each other from those attacks.
-
-### End Phase
-
-Attacks, defenses, and results of actions are resolved.
-
-Blast markers are created; each successfully-hit attack creates a blast marker within
-a certain radius of the targeted ship.
val shipInstance = gameState.ships[ship] ?: return GameEvent.InvalidAction("That ship does not exist")
if (!shipInstance.validatePowerMode(data.powerMode)) return GameEvent.InvalidAction("Invalid power distribution")
+ val prevShieldDamage = shipInstance.powerMode.shields - shipInstance.shieldAmount
+
val newShipInstance = shipInstance.copy(
powerMode = data.powerMode,
isDoneCurrentPhase = true,
weaponAmount = data.powerMode.weapons,
- shieldAmount = data.powerMode.shields,
+ shieldAmount = (data.powerMode.shields - prevShieldDamage).coerceAtLeast(0),
)
val newShips = gameState.ships + mapOf(ship to newShipInstance)
val newChatEntries = mutableListOf<ChatEntry>()
when (phase) {
- is GamePhase.Power -> {
- newShips = newShips.mapValues { (_, ship) ->
- ship.copy(
- weaponAmount = ship.powerMode.weapons,
- shieldAmount = ship.powerMode.shields,
- )
- }
- }
is GamePhase.Move -> {
+ // Auto-move drifting ships
newShips = newShips.mapValues { (_, ship) ->
if (ship.isDoneCurrentPhase) ship
else ship.copy(position = ship.position.drift)
}
+
+ // Ships that move off the battlefield are considered to disengage
newShips = newShips.mapNotNull fleeingShips@{ (id, ship) ->
val r = ship.position.currentLocation.vector
val mx = start.battlefieldWidth / 2
id to ship
}.toMap()
+
+ // Identify enemy ships
newShips = newShips.mapValues { (_, ship) ->
if (ship.isIdentified) ship
else if (newShips.values.any { it.owner != ship.owner && (it.position.currentLocation - ship.position.currentLocation).length <= SHIP_SENSOR_RANGE })
is GamePhase.Attack -> {
val strikeWingDamage = mutableMapOf<ShipHangarWing, Double>()
+ // Apply damage to ships from strike craft
newShips = newShips.mapNotNull strikeBombard@{ (id, ship) ->
if (ship.bomberWings.isEmpty())
return@strikeBombard id to ship
}
}
}.toMap()
+
+ // Apply damage to strike craft wings
newShips = newShips.mapValues { (shipId, ship) ->
val newArmaments = ship.armaments.weaponInstances.mapValues { (weaponId, weapon) ->
if (weapon is ShipWeaponInstance.Hangar)
armaments = ShipInstanceArmaments(newArmaments)
)
}
+
+ // Recall strike craft and regenerate weapon and shield powers
newShips = newShips.mapValues { (_, ship) ->
ship.copy(
+ weaponAmount = ship.powerMode.weapons,
+ shieldAmount = (ship.shieldAmount..ship.powerMode.shields).random(),
+
fighterWings = emptyList(),
bomberWings = emptyList(),
usedArmaments = emptySet(),
}
enum class ShipSubsystem {
- WEAPONS, SHIELDS, ENGINES, EMITTER;
+ WEAPONS, SHIELDS, ENGINES, BATTERY;
val displayName: String
get() = name.lowercase().replaceFirstChar { it.uppercase() }
WEAPONS -> "#FF6633"
SHIELDS -> "#6699FF"
ENGINES -> "#FFCC33"
- EMITTER -> "#33FF66"
+ BATTERY -> "#33FF66"
}
val imageUrl: String
val weapons: Int,
val shields: Int,
val engines: Int,
- val emitter: Int,
+ val battery: Int,
) {
operator fun plus(delta: Map<ShipSubsystem, Int>) = copy(
weapons = weapons + (delta[ShipSubsystem.WEAPONS] ?: 0),
shields = shields + (delta[ShipSubsystem.SHIELDS] ?: 0),
engines = engines + (delta[ShipSubsystem.ENGINES] ?: 0),
- emitter = emitter + (delta[ShipSubsystem.EMITTER] ?: 0),
+ battery = battery + (delta[ShipSubsystem.BATTERY] ?: 0),
)
operator fun minus(delta: Map<ShipSubsystem, Int>) = this + delta.mapValues { (_, d) -> -d }
ShipSubsystem.WEAPONS -> weapons
ShipSubsystem.SHIELDS -> shields
ShipSubsystem.ENGINES -> engines
- ShipSubsystem.EMITTER -> emitter
+ ShipSubsystem.BATTERY -> battery
}
val total: Int
- get() = weapons + shields + engines + emitter
+ get() = weapons + shields + engines + battery
infix fun distanceTo(other: ShipPowerMode) = ShipSubsystem.values().sumOf { subsystem -> abs(this[subsystem] - other[subsystem]) }
}
--- /dev/null
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+++ /dev/null
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h3 { +"Subsystem Powering" }
p {
- +"Ships have two particular attributes that are closely related: Reactor Power and Energy Flow. Reactor Power is how much power the ship's generators generate, and starts off as being split evenly between the ship's four subsystems: Weapons, Shields, Engines, and Emitters. Weapons Power is expended when firing Cannons or charging Lances; Shields Power is expended whenever the ship's shields are impacted by enemy fire; Engines Power modifies the speed and turn rate of the ship; finally, Emitter Power modifies the ship's special techno-science abilities. The ship's Energy Flow statistic determines how many transfers can be made between subsystems during the Power Distribution phase of a turn."
+ +"Ships have two particular attributes that are closely related: Reactor Power and Energy Flow. Reactor Power is how much power the ship's generators generate, and starts off as being split evenly between the ship's four subsystems: Weapons, Shields, Engines, and Battery. Weapons Power is expended when firing Cannons or charging Lances; Shields Power is expended whenever the ship's shields are impacted by enemy fire; Engines Power modifies the speed and turn rate of the ship; finally, Battery Power modifies the ship's special techno-science abilities. The ship's Energy Flow statistic determines how many transfers can be made between subsystems during the Power Distribution phase of a turn."
}
h3 { +"Turn Structure" }
p {
projects / starship-fights / commitdiff
