expansion + better grass colors

src/map.rs

@@ -16,9 +16,8 @@ pub struct Plugin;
 impl bevy::prelude::Plugin for Plugin {
     fn build(&self, app: &mut App) {
         app.add_systems(Startup, setup)
-            .insert_resource(Time::<Fixed>::from_seconds(0.25)) // Time for a day
             .add_systems(PreUpdate, picking_backend.in_set(PickSet::Backend))
-            .add_systems(Update, (update_map_mesh, cells_regeneration))
+            .add_systems(Update, (update_map_mesh, cells_regeneration, expand))
             .insert_resource(ClearColor(Color::srgb(0., 0., 1.)))
             .insert_resource(Seed(thread_rng().gen()));
     }

src/map/cells.rs

@@ -1,10 +1,11 @@
 use std::time::Duration;
 
 use bevy::prelude::*;
+use rand::{seq::IteratorRandom, thread_rng, Rng};
 
 use crate::time::GameTime;
 
-use super::{MapMarker, MeshNeedsUpdate};
+use super::{CellsEntities, MapMarker, MeshNeedsUpdate, Voronoi};
 
 #[derive(Debug, Clone, Copy, PartialEq, Eq)]
 pub enum CellKind {
@@ -33,15 +34,6 @@ pub struct Cell {
     pub vertices: Vec<usize>
 }
 impl Cell {
-    // pub fn new(kind: CellKind, voronoi_id: usize, altitude: u8, moisture: u8, vertices: Vec<usize>) -> Self {
-    //     Self {
-    //         kind,
-    //         voronoi_id,
-    //         altitude,
-    //         moisture,
-    //         vertices
-    //     }
-    // }
     pub fn color(&self, wealth: u8) -> [f32; 4] {
         match self.kind {
             CellKind::Sea => [0., 0., 1., 1.],
@@ -49,7 +41,7 @@ impl Cell {
             CellKind::Forest => [0., 0.5 - (wealth as f32/255.*0.4), 0., 1.],
             CellKind::Dirt => [0.53 - (wealth as f32/255.*0.4), 0.38-(wealth as f32/255.*0.4), 0.29-(wealth as f32/255.*0.4), 1.],
             CellKind::Stone => [0.5, 0.5, 0.5, 1.],
-            CellKind::Grass => [(136./255.) - (wealth as f32/255.*0.4), (204./255.) - (wealth as f32/255.*0.4), (59./255.) - (wealth as f32/255.*0.4), 1.]
+            CellKind::Grass => [(136./255.) - (wealth as f32/255.*0.15), (154./255.) + (wealth as f32/255.*0.1), (59./255.) - (wealth as f32/255.*0.15), 1.]
         }
     }
 }
@@ -84,3 +76,52 @@ pub fn cells_regeneration(
         }
     }
 }
+
+pub fn expand(
+    mut cells: Query<(&mut Cell, Option<&Wealth>)>,
+    map: Query<(&Voronoi, &CellsEntities)>,
+    mut cmds: Commands,
+    t: Res<Time>,
+    gt: Res<GameTime>
+) {
+    let (voronoi, cells_entities) = map.single();
+    let mut random = thread_rng();
+    let mut changes = Vec::new();
+    for (cell, wealth) in cells.iter() {
+        // TODO: search beter numbers, for now they are arbitrary
+        if cell.kind == CellKind::Forest || cell.kind == CellKind::Grass {
+            let wealth = if cell.kind == CellKind::Forest {
+                1.
+            } else {
+                wealth.unwrap().0 as f64/255.
+            };
+            if random.gen_bool((t.elapsed_secs_f64()*(gt.speed as f64)*wealth/(60.*60.*24.*30.)).min(1.)) { // Let say that grass takes 1 months to expand
+                let target = voronoi.0.cell(cell.voronoi_id).iter_neighbors().choose(&mut random).unwrap();
+                changes.push((target, CellKind::Grass));
+            }
+        }
+        if cell.kind == CellKind::Forest {
+            if random.gen_bool((t.elapsed_secs_f64()*(gt.speed as f64)*(wealth.unwrap().0 as f64/255.).sqrt()/(60.*60.*24.*365.*5.)).min(1.)) { // Let say that forest takes 5 years to expand
+                let target = voronoi.0.cell(cell.voronoi_id).iter_neighbors().choose(&mut random).unwrap();
+                changes.push((target, CellKind::Forest));
+            }
+        }
+    }
+    for (v_id, kind) in changes {
+        let target = cells_entities.0[v_id];
+        let (mut cell, _) = cells.get_mut(target).unwrap();
+        if kind == CellKind::Forest && (cell.kind == CellKind::Dirt || cell.kind == CellKind::Grass) {
+            cell.kind = CellKind::Forest;
+            cmds.entity(target).insert((Wealth(0), Regeneration {
+                full_growth_duration: CellKind::Forest.regen_full_growth_duration(),
+                last_update: gt.current
+            }));
+        } else if kind == CellKind::Grass && cell.kind == CellKind::Dirt {
+            cell.kind = CellKind::Grass;
+            cmds.entity(target).insert((Wealth(0), Regeneration {
+                full_growth_duration: CellKind::Grass.regen_full_growth_duration(),
+                last_update: gt.current
+            }));
+        }
+    }
+}

src/time.rs

@@ -7,7 +7,7 @@ impl bevy::prelude::Plugin for Plugin {
     fn build(&self, app: &mut App) {
         app.insert_resource(GameTime {
                 current: Duration::ZERO,
-                speed: 24. * 60. * 60. * 365.
+                speed: 24. * 60. * 60. * 10.
             })
             .add_systems(PreUpdate, update_time);
     }
@@ -16,7 +16,7 @@ impl bevy::prelude::Plugin for Plugin {
 #[derive(Resource)]
 pub struct GameTime {
     pub current: Duration,
-    speed: f32 // = game time / real time
+    pub speed: f32 // = game time / real time
 }
 
 fn update_time(