Brighter torches with animated flames, smoke and sparks

Co-Authored-By: Claude Opus 5.5 <noreply@anthropic.com>

src/particles.rs

@@ -191,6 +191,7 @@ impl Game {
             self.impact(&f);
         }
         self.spawn_lava_particles(dt);
+        self.spawn_torch_smoke(dt);
         // particles
         for p in self.parts.iter_mut() {
             p.t += dt;
@@ -395,6 +396,25 @@ impl Game {
         }
     }
 
+    // a thin wisp of smoke above every known torch, now and then a spark
+    fn spawn_torch_smoke(&mut self, dt: f32) {
+        let spots: Vec<(f32, f32)> = self.torches.iter().filter(|t| self.map.shown(t.wall)).map(|t| t.pos()).collect();
+        for (x, y) in spots {
+            if self.parts.len() >= PARTS_MAX - 100 {
+                break;
+            }
+            if self.vrng.f() < 1.1 * dt {
+                let v = ((self.vrng.f() - 0.5) * 0.08, (self.vrng.f() - 0.5) * 0.08, 0.32 + self.vrng.f() * 0.12);
+                let life = 1.8 + self.vrng.f() * 0.6;
+                self.part(SMOKE, (x, y, 1.0), v, life, abgr(70, 62, 58), 0.05);
+            }
+            if self.vrng.f() < 0.25 * dt {
+                let v = ((self.vrng.f() - 0.5) * 0.3, (self.vrng.f() - 0.5) * 0.3, 0.9);
+                self.part(EMBER, (x, y, 0.95), v, 0.9, abgr(255, 170, 60), 0.025);
+            }
+        }
+    }
+
     fn spawn_lava_particles(&mut self, dt: f32) {
         if self.parts.len() >= PARTS_MAX {
             return;
@@ -466,6 +486,7 @@ mod tests {
     #[test]
     fn projectiles_trail_and_explode_and_arrows_stick() {
         let mut g = Game::new(3, 64, 64);
+        g.torches.clear(); // no torch smoke in the count below
         let (cx, cy) = g.map.core;
         let (x, y) = (cx as f32 + 1.5, cy as f32 - 1.5);
         g.shot(x, y, 0.5, x + 3.0, y, 0.45, 0.3, 0xffffffff);