Add traps

src/components.rs

@@ -217,3 +217,14 @@ pub struct ProvidesFood {}
 #[derive(Component, Debug, Serialize, Deserialize, Clone)]
 pub struct MagicMapper {}
 
+#[derive(Component, Debug, Serialize, Deserialize, Clone)]
+pub struct Hidden {}
+
+#[derive(Component, Debug, Serialize, Deserialize, Clone)]
+pub struct EntryTrigger {}
+
+#[derive(Component, Debug, Serialize, Deserialize, Clone)]
+pub struct EntityMoved {}
+
+#[derive(Component, Debug, Serialize, Deserialize, Clone)]
+pub struct SingleActivation {}

src/damage_system.rs

@@ -1,4 +1,3 @@
-
 use specs::prelude::*;
 
 use crate::components::{CombatStats, Player, SufferDamage};

src/gui.rs

@@ -1,15 +1,15 @@
-use rltk::{Point, VirtualKeyCode};
-use rltk::RGB;
 use rltk::Rltk;
+use rltk::RGB;
+use rltk::{Point, VirtualKeyCode};
 use specs::prelude::*;
 
-use crate::{CombatStats, InBackpack, RunState, State, Viewshed};
-use crate::{Equipped, Map};
-use crate::{HungerClock, HungerState, Name};
 use crate::gamelog::GameLog;
+use crate::rex_assets::RexAssets;
 use crate::Player;
 use crate::Position;
-use crate::rex_assets::RexAssets;
+use crate::{CombatStats, Hidden, InBackpack, RunState, State, Viewshed};
+use crate::{Equipped, Map};
+use crate::{HungerClock, HungerState, Name};
 
 pub fn draw_ui(ecs: &World, ctx: &mut Rltk) {
     ctx.draw_box(
@@ -100,6 +100,7 @@ fn draw_tooltips(ecs: &World, ctx: &mut Rltk) {
     let map = ecs.fetch::<Map>();
     let names = ecs.read_storage::<Name>();
     let positions = ecs.read_storage::<Position>();
+    let hidden = ecs.read_storage::<Hidden>();
 
     let mouse_pos = ctx.mouse_pos();
     if mouse_pos.0 >= map.width || mouse_pos.1 >= map.height {
@@ -107,7 +108,7 @@ fn draw_tooltips(ecs: &World, ctx: &mut Rltk) {
     }
 
     let mut tooltip: Vec<String> = Vec::new();
-    for (name, position) in (&names, &positions).join() {
+    for (name, position, _hidden) in (&names, &positions, !&hidden).join() {
         let idx = map.xy_idx(position.x, position.y);
         if position.x == mouse_pos.0 && position.y == mouse_pos.1 && map.visible_tiles[idx] {
             tooltip.push(name.name.to_string());
@@ -446,10 +447,32 @@ pub fn main_menu(gs: &mut State, ctx: &mut Rltk) -> MainMenuResult {
     let assets = gs.ecs.fetch::<RexAssets>();
     ctx.render_xp_sprite(&assets.menu, 0, 0);
 
-    ctx.draw_box_double(24, 18, 31, 10, RGB::named(rltk::WHEAT), RGB::named(rltk::BLACK));
-    ctx.print_color_centered(20, RGB::named(rltk::YELLOW), RGB::named(rltk::BLACK), "Rust Roguelike Tutorial");
-    ctx.print_color_centered(21, RGB::named(rltk::CYAN), RGB::named(rltk::BLACK), "by Herbert Wolverson");
-    ctx.print_color_centered(22, RGB::named(rltk::GRAY), RGB::named(rltk::BLACK), "Use Up/Down Arrows and Enter");
+    ctx.draw_box_double(
+        24,
+        18,
+        31,
+        10,
+        RGB::named(rltk::WHEAT),
+        RGB::named(rltk::BLACK),
+    );
+    ctx.print_color_centered(
+        20,
+        RGB::named(rltk::YELLOW),
+        RGB::named(rltk::BLACK),
+        "Rust Roguelike Tutorial",
+    );
+    ctx.print_color_centered(
+        21,
+        RGB::named(rltk::CYAN),
+        RGB::named(rltk::BLACK),
+        "by Herbert Wolverson",
+    );
+    ctx.print_color_centered(
+        22,
+        RGB::named(rltk::GRAY),
+        RGB::named(rltk::BLACK),
+        "Use Up/Down Arrows and Enter",
+    );
 
     let mut y = 24;
     if let RunState::MainMenu {

src/hunger_system.rs

@@ -1,6 +1,5 @@
 use specs::prelude::*;
 
-
 use crate::{GameLog, Heals, HungerClock, HungerState, RunState, SufferDamage};
 
 pub struct HungerSystem {}

src/inventory_system.rs

@@ -1,8 +1,13 @@
 use specs::prelude::*;
 
-use crate::{AreaOfEffect, CombatStats, Confusion, Consumable, Equippable, Equipped, HungerClock, HungerState, InBackpack, InflictsDamage, MagicMapper, Map, Name, Position, ProvidesFood, ProvidesHealing, Ranged, RunState, SufferDamage, WantsToDropItem, WantsToPickupItem, WantsToRemoveItem, WantsToUseItem};
 use crate::gamelog::GameLog;
 use crate::particle_system::ParticleBuilder;
+use crate::{
+    AreaOfEffect, CombatStats, Confusion, Consumable, Equippable, Equipped, HungerClock,
+    HungerState, InBackpack, InflictsDamage, MagicMapper, Map, Name, Position, ProvidesFood,
+    ProvidesHealing, Ranged, RunState, SufferDamage, WantsToDropItem, WantsToPickupItem,
+    WantsToRemoveItem, WantsToUseItem,
+};
 
 pub struct ItemCollectionSystem {}
 
@@ -71,7 +76,7 @@ impl<'a> System<'a> for ItemUseSystem {
         ReadStorage<'a, ProvidesFood>,
         WriteStorage<'a, HungerClock>,
         ReadStorage<'a, MagicMapper>,
-    WriteExpect<'a, RunState>
+        WriteExpect<'a, RunState>,
     );
 
     fn run(&mut self, data: Self::SystemData) {
@@ -98,7 +103,7 @@ impl<'a> System<'a> for ItemUseSystem {
             provides_food,
             mut hunger_clocks,
             magic_mapper,
-            mut run_state
+            mut run_state,
         ) = data;
 
         for (entity, use_item) in (&entities, &wants_use).join() {
@@ -144,8 +149,10 @@ impl<'a> System<'a> for ItemUseSystem {
 
             if let Some(_mapper) = magic_mapper.get(use_item.item) {
                 used_item = true;
-                game_log.entries.push("The map is revealed to you!".to_string());
-                    *run_state = RunState::MagicMapReveal {row: 0};
+                game_log
+                    .entries
+                    .push("The map is revealed to you!".to_string());
+                *run_state = RunState::MagicMapReveal { row: 0 };
             }
 
             if let Some(_item_edible) = provides_food.get(use_item.item) {

src/main.rs

@@ -20,6 +20,7 @@ use crate::inventory_system::{
     ItemCollectionSystem, ItemDropSystem, ItemRemoveSystem, ItemUseSystem,
 };
 use crate::particle_system::ParticleSpawnSystem;
+use crate::trigger_system::TriggerSystem;
 
 mod components;
 mod damage_system;
@@ -36,10 +37,11 @@ mod particle_system;
 mod player;
 mod random_table;
 mod rect;
+mod rex_assets;
 mod save_load_system;
 mod spawner;
 mod visibility_system;
-mod rex_assets;
+mod trigger_system;
 
 #[derive(PartialEq, Copy, Clone)]
 pub enum RunState {
@@ -60,7 +62,9 @@ pub enum RunState {
     NextLevel,
     ShowRemoveItem,
     GameOver,
-    MagicMapReveal { row: i32 },
+    MagicMapReveal {
+        row: i32,
+    },
 }
 
 pub struct State {
@@ -210,6 +214,9 @@ impl State {
         let mut mob = MonsterAI {};
         mob.run_now(&self.ecs);
 
+        let mut trigger = TriggerSystem {};
+        trigger.run_now(&self.ecs);
+
         let mut map_index = MapIndexingSystem {};
         map_index.run_now(&self.ecs);
 
@@ -262,11 +269,14 @@ impl GameState for State {
 
                 let positions = self.ecs.read_storage::<Position>();
                 let renderables = self.ecs.read_storage::<Renderable>();
+                let hidden = self.ecs.read_storage::<Hidden>();
                 let map = self.ecs.fetch::<Map>();
 
-                let mut data = (&positions, &renderables).join().collect::<Vec<_>>();
+                let mut data = (&positions, &renderables, !&hidden)
+                    .join()
+                    .collect::<Vec<_>>();
                 data.sort_by(|&a, &b| b.1.render_order.cmp(&a.1.render_order));
-                for (pos, render) in data.iter() {
+                for (pos, render, _hidden) in data.iter() {
                     let idx = map.xy_idx(pos.x, pos.y);
                     if map.visible_tiles[idx] {
                         ctx.set(pos.x, pos.y, render.fg, render.bg, render.glyph)
@@ -287,8 +297,12 @@ impl GameState for State {
                 self.run_systems();
                 new_run_state = RunState::MonsterTurn;
                 match *self.ecs.fetch::<RunState>() {
-                    RunState::MagicMapReveal { .. } => { new_run_state = RunState::MagicMapReveal { row: 0 } }
-                    _ => { new_run_state = RunState::MonsterTurn; }
+                    RunState::MagicMapReveal { .. } => {
+                        new_run_state = RunState::MagicMapReveal { row: 0 }
+                    }
+                    _ => {
+                        new_run_state = RunState::MonsterTurn;
+                    }
                 }
             }
             RunState::MonsterTurn => {
@@ -422,9 +436,7 @@ impl GameState for State {
                     }
                 }
             }
-            RunState::MagicMapReveal {
-                row
-            } => {
+            RunState::MagicMapReveal { row } => {
                 let mut map = self.ecs.fetch_mut::<Map>();
                 for x in 0..MAP_WIDTH {
                     let idx = map.xy_idx(x as i32, row);
@@ -433,7 +445,7 @@ impl GameState for State {
                 if row as usize == MAP_HEIGHT - 1 {
                     new_run_state = RunState::MonsterTurn;
                 } else {
-                    new_run_state = RunState::MagicMapReveal {row: row + 1}
+                    new_run_state = RunState::MagicMapReveal { row: row + 1 }
                 }
             }
         }
@@ -493,6 +505,10 @@ fn main() -> rltk::BError {
     gs.ecs.register::<Heals>();
     gs.ecs.register::<ProvidesFood>();
     gs.ecs.register::<MagicMapper>();
+    gs.ecs.register::<Hidden>();
+    gs.ecs.register::<EntryTrigger>();
+    gs.ecs.register::<EntityMoved>();
+    gs.ecs.register::<SingleActivation>();
 
     gs.ecs.insert(SimpleMarkerAllocator::<SerializeMe>::new());
 

src/monster_ai_system.rs

@@ -5,7 +5,7 @@ use crate::particle_system::ParticleBuilder;
 use crate::{
     components::{Monster, Position, Viewshed, WantsToMelee},
     map::Map,
-    Confusion, RunState,
+    Confusion, EntityMoved, RunState,
 };
 
 pub struct MonsterAI {}
@@ -24,6 +24,7 @@ impl<'a> System<'a> for MonsterAI {
         WriteStorage<'a, WantsToMelee>,
         WriteStorage<'a, Confusion>,
         WriteExpect<'a, ParticleBuilder>,
+        WriteStorage<'a, EntityMoved>,
     );
 
     fn run(&mut self, data: Self::SystemData) {
@@ -39,6 +40,7 @@ impl<'a> System<'a> for MonsterAI {
             mut wants_to_melee,
             mut confused,
             mut particle_builder,
+            mut entity_moved,
         ) = data;
 
         if *runstate != RunState::MonsterTurn {
@@ -96,6 +98,10 @@ impl<'a> System<'a> for MonsterAI {
                     idx = map.xy_idx(pos.x, pos.y);
                     map.blocked[idx] = true;
                     viewshed.dirty = true;
+
+                    entity_moved
+                        .insert(entity, EntityMoved {})
+                        .expect("Unable to insert entity moved");
                 }
             }
         }

src/player.rs

@@ -8,7 +8,8 @@ use crate::gamelog::GameLog;
 use crate::{
     components::{CombatStats, Player, Position, Viewshed, WantsToMelee},
     map::Map,
-    HungerClock, HungerState, Item, Monster, RunState, State, TileType, WantsToPickupItem,
+    EntityMoved, HungerClock, HungerState, Item, Monster, RunState, State, TileType,
+    WantsToPickupItem,
 };
 
 pub fn try_move_player(delta_x: i32, delta_y: i32, ecs: &mut World) {
@@ -19,6 +20,7 @@ pub fn try_move_player(delta_x: i32, delta_y: i32, ecs: &mut World) {
     let entities = ecs.entities();
     let mut wants_to_melee = ecs.write_storage::<WantsToMelee>();
     let map = ecs.fetch::<Map>();
+    let mut entity_moved = ecs.write_storage::<EntityMoved>();
 
     for (entity, _player, pos, viewshed) in
         (&entities, &mut players, &mut positions, &mut viewsheds).join()
@@ -54,6 +56,10 @@ pub fn try_move_player(delta_x: i32, delta_y: i32, ecs: &mut World) {
             let mut ppos = ecs.write_resource::<Point>();
             ppos.x = pos.x;
             ppos.y = pos.y;
+
+            entity_moved
+                .insert(entity, EntityMoved {})
+                .expect("Unable to insert marker");
         }
     }
 }

src/rex_assets.rs

@@ -12,7 +12,7 @@ impl RexAssets {
         rltk::link_resource!(SMALL_DUNGEON, "../resources/SmallDungeon_80x50.xp");
 
         RexAssets {
-            menu: XpFile::from_resource("../resources/SmallDungeon_80x50.xp").unwrap()
+            menu: XpFile::from_resource("../resources/SmallDungeon_80x50.xp").unwrap(),
         }
     }
 }

src/save_load_system.rs

@@ -81,7 +81,11 @@ pub fn save_game(ecs: &mut World) {
             HungerClock,
             Heals,
             ProvidesFood,
-            MagicMapper
+            MagicMapper,
+            Hidden,
+            EntryTrigger,
+            EntityMoved,
+            SingleActivation
         );
     }
 
@@ -165,7 +169,11 @@ pub fn load_game(ecs: &mut World) {
             HungerClock,
             Heals,
             ProvidesFood,
-            MagicMapper
+            MagicMapper,
+            Hidden,
+            EntryTrigger,
+            EntityMoved,
+            SingleActivation
         );
     }
 

src/spawner.rs

@@ -4,7 +4,7 @@ use rltk::{FontCharType, RandomNumberGenerator, RGB};
 use specs::prelude::*;
 use specs::saveload::{MarkedBuilder, SimpleMarker};
 
-use crate::{AreaOfEffect, BlocksTile, CombatStats, Confusion, Consumable, DefenseBonus, EquipmentSlot, Equippable, HungerClock, HungerState, InflictsDamage, Item, MagicMapper, MAP_WIDTH, MAX_MONSTER, MeleePowerBonus, Monster, Name, Player, Position, ProvidesFood, ProvidesHealing, Ranged, Renderable, SerializeMe, Viewshed};
+use crate::{AreaOfEffect, BlocksTile, CombatStats, Confusion, Consumable, DefenseBonus, EntryTrigger, EquipmentSlot, Equippable, Hidden, HungerClock, HungerState, InflictsDamage, Item, MagicMapper, MAP_WIDTH, MAX_MONSTER, MeleePowerBonus, Monster, Name, Player, Position, ProvidesFood, ProvidesHealing, Ranged, Renderable, SerializeMe, SingleActivation, Viewshed};
 use crate::random_table::RandomTable;
 use crate::rect::Rect;
 
@@ -127,6 +127,7 @@ pub fn spawn_room(ecs: &mut World, room: &Rect, map_depth: i32) {
             "Sabatons" => sabatons(ecs, x, y),
             "Rations" => rations(ecs, x, y),
             "Magic Mapping Scroll" => magic_mapper_scroll(ecs, x, y),
+            "Bear Trap" => bear_trap(ecs, x, y),
             _ => {}
         }
     }
@@ -230,6 +231,7 @@ pub fn room_table(map_depth: i32) -> RandomTable {
         .add("Sabatons", map_depth - 4)
         .add("Rations", 10)
         .add("Magic Mapping Scroll", 2)
+        .add("Bear Trap", 2)
 }
 
 fn dagger(ecs: &mut World, x: i32, y: i32) {
@@ -439,3 +441,23 @@ fn magic_mapper_scroll(ecs: &mut World, x: i32, y: i32) {
         .marked::<SimpleMarker<SerializeMe>>()
         .build();
 }
+
+fn bear_trap(ecs: &mut World, x: i32, y: i32) {
+    ecs.create_entity()
+        .with(Position { x, y })
+        .with(Renderable {
+            glyph: rltk::to_cp437('^'),
+            render_order: 2,
+            fg: RGB::named(rltk::RED),
+            bg: RGB::named(rltk::BLACK),
+        })
+        .with(Name {
+            name: "Bear Trap".to_string(),
+        })
+        .with(Hidden {})
+        .with(EntryTrigger {})
+        .with(InflictsDamage { damage: 6 })
+        .with(SingleActivation {})
+        .marked::<SimpleMarker<SerializeMe>>()
+        .build();
+}

src/trigger_system.rs

@@ -0,0 +1,62 @@
+use specs::prelude::*;
+
+use crate::{EntityMoved, EntryTrigger, GameLog, Hidden, InflictsDamage, Map, Name, Position, SingleActivation, SufferDamage};
+use crate::particle_system::ParticleBuilder;
+
+pub struct TriggerSystem {}
+
+impl<'a> System<'a> for TriggerSystem {
+    type SystemData = (
+        ReadExpect<'a, Map>,
+        WriteStorage<'a, EntityMoved>,
+        ReadStorage<'a, Position>,
+        ReadStorage<'a, EntryTrigger>,
+        WriteStorage<'a, Hidden>,
+        ReadStorage<'a, Name>,
+        Entities<'a>,
+        WriteExpect<'a, GameLog>,
+        ReadStorage<'a, InflictsDamage>,
+        WriteExpect<'a, ParticleBuilder>,
+        WriteStorage<'a, SufferDamage>,
+        WriteStorage<'a, SingleActivation>
+    );
+
+    fn run(&mut self, data: Self::SystemData) {
+        let (map, mut entity_moved, position, entry_trigger, mut hidden, names, entities, mut game_log, inflicts_damage, mut particle_builder, mut inflict_damage, mut single_activation) = data;
+
+        let mut remove_entities: Vec<Entity> = Vec::new();
+        for (entity, mut _entity_moved, pos) in (&entities, &mut entity_moved, &position).join() {
+            let idx = map.xy_idx(pos.x, pos.y);
+
+            for entity_id in map.tile_content[idx].iter() {
+                if *entity_id == entity {
+                    continue;
+                }
+
+                if let Some(_trigger) = entry_trigger.get(*entity_id) {
+                    if let Some(name) = names.get(*entity_id) {
+                        game_log.entries.push(format!("{} triggers", name.name))
+                    }
+
+                    hidden.remove(*entity_id);
+
+                    if let Some(damage) = inflicts_damage.get(*entity_id) {
+                        particle_builder.request(pos.x, pos.y, rltk::RGB::named(rltk::ORANGE), rltk::RGB::named(rltk::BLACK), rltk::to_cp437('‼'), 200.0);
+                        SufferDamage::new_damage(&mut inflict_damage, entity, damage.damage);
+                    }
+
+                    if let Some(_sa) = single_activation.get(*entity_id) {
+                        remove_entities.push(*entity_id);
+                    }
+                }
+            }
+        }
+
+        for trap in remove_entities.iter() {
+            entities.delete(*trap).expect("Could not delete trap");
+        }
+
+        entity_moved.clear();
+    }
+}
+

src/visibility_system.rs

@@ -1,10 +1,7 @@
-use rltk::{field_of_view, Point};
+use rltk::{field_of_view, Point, RandomNumberGenerator};
 use specs::prelude::*;
 
-use crate::{
-    components::{Player, Position, Viewshed},
-    map::Map,
-};
+use crate::{components::{Player, Position, Viewshed}, GameLog, Hidden, map::Map, Name};
 
 pub struct VisibilitySystem {}
 
@@ -15,10 +12,14 @@ impl<'a> System<'a> for VisibilitySystem {
         WriteStorage<'a, Viewshed>,
         WriteStorage<'a, Position>,
         ReadStorage<'a, Player>,
+        WriteStorage<'a, Hidden>,
+        WriteExpect<'a, RandomNumberGenerator>,
+        ReadStorage<'a, Name>,
+        WriteExpect<'a, GameLog>
     );
 
     fn run(&mut self, data: Self::SystemData) {
-        let (mut map, entities, mut viewshed, pos, player) = data;
+        let (mut map, entities, mut viewshed, pos, player, mut hidden, mut rng, names, mut game_log) = data;
         for (ent, viewshed, pos) in (&entities, &mut viewshed, &pos).join() {
             if !viewshed.dirty {
                 continue;
@@ -39,6 +40,17 @@ impl<'a> System<'a> for VisibilitySystem {
                     let idx = map.xy_idx(vis.x, vis.y);
                     map.revealed_tiles[idx] = true;
                     map.visible_tiles[idx] = true;
+
+                    for e in map.tile_content[idx].iter() {
+                        if let Some(_maybe_hidden) = hidden.get(*e) {
+                            if rng.roll_dice(1, 24) == 1 {
+                                if let Some(name) = names.get(*e) {
+                                    game_log.entries.push(format!("You spotted a {}.", &name.name));
+                                }
+                                hidden.remove(*e);
+                            }
+                        }
+                    }
                 }
             }
         }