roguelike-game/src/spawner.rs

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Rust
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use crate::components::*;
use crate::{map::MAP_WIDTH, random_table::RandomTable, Map, Rect, TileType};
use rltk::{RandomNumberGenerator, RGB};
use specs::prelude::*;
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use specs::saveload::{MarkedBuilder, SimpleMarker};
use std::collections::HashMap;
/// Spawns the player and returns their entity object
pub fn player(ecs: &mut World, player_x: i32, player_y: i32) -> Entity {
ecs.create_entity()
.with(Position {
x: player_x,
y: player_y,
})
.with(Renderable {
glyph: rltk::to_cp437('@'),
fg: RGB::named(rltk::YELLOW),
bg: RGB::named(rltk::BLACK),
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render_order: 0,
})
.with(Player {})
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.with(Viewshed::default())
.with(Name::from("Player"))
.with(CombatStats {
max_hp: 30,
hp: 30,
defense: 2,
power: 5,
})
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.with(HungerClock {
state: HungerState::WellFed,
duration: 20,
})
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.marked::<SimpleMarker<SerializeMe>>()
.build()
}
const MAX_MONSTERS: i32 = 4;
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fn room_table(map_depth: i32) -> RandomTable {
RandomTable::new()
.add("Goblin", 10)
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.add("Orc", 1 + map_depth)
.add("Health Potion", 7)
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.add("Fireball Scroll", 2 + map_depth)
.add("Confusion Scroll", 2 + map_depth)
.add("Magic Missile Scroll", 4)
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.add("Dagger", 3)
.add("Shield", 3)
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.add("Longsword", map_depth - 1)
.add("Tower Shield", map_depth - 1)
.add("Rations", 10)
.add("Magic Mapping Scroll", 2)
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.add("Bear Trap", 2)
}
/// fills a room with stuff!
#[allow(clippy::map_entry)]
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pub fn spawn_room(ecs: &mut World, room: &Rect, map_depth: i32) {
let mut possible_targets: Vec<usize> = Vec::new();
// Borrow scope - to keep access to the map separated
{
let map = ecs.fetch::<Map>();
for y in room.y1 + 1..room.y2 {
for x in room.x1 + 1..room.x2 {
let idx = map.xy_idx(x, y);
if map.tiles[idx] == TileType::Floor {
possible_targets.push(idx);
}
}
}
}
spawn_region(ecs, &possible_targets, map_depth);
}
pub fn spawn_region(ecs: &mut World, area: &[usize], map_depth: i32) {
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let spawn_table = room_table(map_depth);
let mut spawn_points: HashMap<usize, String> = HashMap::new();
let mut areas: Vec<usize> = Vec::from(area);
// Scope to keep the borrow checker happy
{
let mut rng = ecs.write_resource::<RandomNumberGenerator>();
let num_spawns = i32::min(
areas.len() as i32,
rng.roll_dice(1, MAX_MONSTERS + 3) + (map_depth - 1) - 3,
);
if num_spawns == 0 {
return;
}
for _i in 0..num_spawns {
let array_index = if areas.len() == 1 {
0usize
} else {
(rng.roll_dice(1, areas.len() as i32) - 1) as usize
};
let map_idx = areas[array_index];
spawn_points.insert(map_idx, spawn_table.roll(&mut rng));
areas.remove(array_index);
}
}
// Actually spawn the monsters
for spawn in spawn_points.iter() {
spawn_entity(ecs, &spawn);
}
}
/// Spawns a named entity (name in tuple.1) at the location in (tuple.0)
fn spawn_entity(ecs: &mut World, spawn: &(&usize, &String)) {
let x = (*spawn.0 % MAP_WIDTH) as i32;
let y = (*spawn.0 / MAP_WIDTH) as i32;
match spawn.1.as_ref() {
"Goblin" => goblin(ecs, x, y),
"Orc" => orc(ecs, x, y),
"Health Potion" => health_potion(ecs, x, y),
"Fireball Scroll" => fireball_scroll(ecs, x, y),
"Confusion Scroll" => confusion_scroll(ecs, x, y),
"Magic Missile Scroll" => magic_missile_scroll(ecs, x, y),
"Dagger" => dagger(ecs, x, y),
"Shield" => shield(ecs, x, y),
"Longsword" => longsword(ecs, x, y),
"Tower Shield" => tower_shield(ecs, x, y),
"Rations" => rations(ecs, x, y),
"Magic Mapping Scroll" => magic_mapping_scroll(ecs, x, y),
"Bear Trap" => bear_trap(ecs, x, y),
_ => {}
}
}
fn orc(ecs: &mut World, x: i32, y: i32) {
monster(ecs, x, y, rltk::to_cp437('o'), "Orc");
}
fn goblin(ecs: &mut World, x: i32, y: i32) {
monster(ecs, x, y, rltk::to_cp437('g'), "Goblin");
}
fn monster<S: ToString>(ecs: &mut World, x: i32, y: i32, glyph: rltk::FontCharType, name: S) {
ecs.create_entity()
.with(Position { x, y })
.with(Renderable {
glyph,
fg: RGB::named(rltk::RED),
bg: RGB::named(rltk::BLACK),
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render_order: 1,
})
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.with(Viewshed::default())
.with(Monster {})
.with(Name::from(name))
.with(BlocksTile {})
.with(CombatStats {
max_hp: 16,
hp: 16,
defense: 1,
power: 4,
})
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.marked::<SimpleMarker<SerializeMe>>()
.build();
}
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fn health_potion(ecs: &mut World, x: i32, y: i32) {
ecs.create_entity()
.with(Position { x, y })
.with(Renderable {
glyph: rltk::to_cp437('¡'),
fg: RGB::named(rltk::MAGENTA),
bg: RGB::named(rltk::BLACK),
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render_order: 2,
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})
.with(Name::from("Health Potion"))
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.with(Item {})
.with(Consumable {})
.with(ProvidesHealing { heal_amount: 8 })
.marked::<SimpleMarker<SerializeMe>>()
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.build();
}
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fn magic_missile_scroll(ecs: &mut World, x: i32, y: i32) {
ecs.create_entity()
.with(Position { x, y })
.with(Renderable {
glyph: rltk::to_cp437(')'),
fg: RGB::named(rltk::CYAN),
bg: RGB::named(rltk::BLACK),
render_order: 2,
})
.with(Name::from("Magic Missile Scroll"))
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.with(Item {})
.with(Consumable {})
.with(Ranged { range: 6 })
.with(InflictsDamage { damage: 20 })
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.marked::<SimpleMarker<SerializeMe>>()
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.build();
}
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fn fireball_scroll(ecs: &mut World, x: i32, y: i32) {
ecs.create_entity()
.with(Position { x, y })
.with(Renderable {
glyph: rltk::to_cp437(')'),
fg: RGB::named(rltk::ORANGE),
bg: RGB::named(rltk::BLACK),
render_order: 2,
})
.with(Name::from("Fireball Scroll"))
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.with(Item {})
.with(Consumable {})
.with(Ranged { range: 6 })
.with(InflictsDamage { damage: 20 })
.with(AreaOfEffect { radius: 3 })
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.marked::<SimpleMarker<SerializeMe>>()
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.build();
}
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fn confusion_scroll(ecs: &mut World, x: i32, y: i32) {
ecs.create_entity()
.with(Position { x, y })
.with(Renderable {
glyph: rltk::to_cp437(')'),
fg: RGB::named(rltk::PINK),
bg: RGB::named(rltk::BLACK),
render_order: 2,
})
.with(Name::from("Confusion Scroll"))
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.with(Item {})
.with(Consumable {})
.with(Ranged { range: 6 })
.with(Confusion { turns: 4 })
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.marked::<SimpleMarker<SerializeMe>>()
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.build();
}
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fn dagger(ecs: &mut World, x: i32, y: i32) {
ecs.create_entity()
.with(Position { x, y })
.with(Renderable {
glyph: rltk::to_cp437('/'),
fg: RGB::named(rltk::CYAN),
bg: RGB::named(rltk::BLACK),
render_order: 2,
})
.with(Name::from("Dagger"))
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.with(Item {})
.with(Equippable {
slot: EquipmentSlot::Melee,
})
.with(MeleePowerBonus { power: 2 })
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.marked::<SimpleMarker<SerializeMe>>()
.build();
}
fn shield(ecs: &mut World, x: i32, y: i32) {
ecs.create_entity()
.with(Position { x, y })
.with(Renderable {
glyph: rltk::to_cp437('('),
fg: RGB::named(rltk::CYAN),
bg: RGB::named(rltk::BLACK),
render_order: 2,
})
.with(Name::from("Shield"))
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.with(Item {})
.with(Equippable {
slot: EquipmentSlot::Shield,
})
.with(DefenseBonus { defense: 1 })
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.marked::<SimpleMarker<SerializeMe>>()
.build();
}
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fn longsword(ecs: &mut World, x: i32, y: i32) {
ecs.create_entity()
.with(Position { x, y })
.with(Renderable {
glyph: rltk::to_cp437('/'),
fg: RGB::named(rltk::CYAN),
bg: RGB::named(rltk::BLACK),
render_order: 2,
})
.with(Name::from("Longsword"))
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.with(Item {})
.with(Equippable {
slot: EquipmentSlot::Melee,
})
.with(MeleePowerBonus { power: 4 })
.marked::<SimpleMarker<SerializeMe>>()
.build();
}
fn tower_shield(ecs: &mut World, x: i32, y: i32) {
ecs.create_entity()
.with(Position { x, y })
.with(Renderable {
glyph: rltk::to_cp437('('),
fg: RGB::named(rltk::CYAN),
bg: RGB::named(rltk::BLACK),
render_order: 2,
})
.with(Name::from("Tower Shield"))
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.with(Item {})
.with(Equippable {
slot: EquipmentSlot::Shield,
})
.with(DefenseBonus { defense: 3 })
.marked::<SimpleMarker<SerializeMe>>()
.build();
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}
fn rations(ecs: &mut World, x: i32, y: i32) {
ecs.create_entity()
.with(Position { x, y })
.with(Renderable {
glyph: rltk::to_cp437('%'),
fg: RGB::named(rltk::GREEN),
bg: RGB::named(rltk::BLACK),
render_order: 2,
})
.with(Name::from("Rations"))
.with(Item {})
.with(ProvidesFood {})
.with(Consumable {})
.marked::<SimpleMarker<SerializeMe>>()
.build();
}
fn magic_mapping_scroll(ecs: &mut World, x: i32, y: i32) {
ecs.create_entity()
.with(Position { x, y })
.with(Renderable {
glyph: rltk::to_cp437(')'),
fg: RGB::named(rltk::CYAN3),
bg: RGB::named(rltk::BLACK),
render_order: 2,
})
.with(Name::from("Scroll of Magic Mapping"))
.with(Item {})
.with(MagicMapper {})
.with(Consumable {})
.marked::<SimpleMarker<SerializeMe>>()
.build();
}
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fn bear_trap(ecs: &mut World, x: i32, y: i32) {
ecs.create_entity()
.with(Position { x, y })
.with(Renderable {
glyph: rltk::to_cp437('^'),
fg: RGB::named(rltk::RED),
bg: RGB::named(rltk::BLACK),
render_order: 2,
})
.with(Name::from("Bear Trap"))
.with(Hidden {})
.with(EntryTrigger {})
.with(InflictsDamage { damage: 6 })
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.with(SingleActivation {})
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.marked::<SimpleMarker<SerializeMe>>()
.build();
}