The dead leave remains for good: a pool of blood and bones, armour bits from heroes, splinters from machines; dust where they fall

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

src/render3d.rs

@@ -1267,6 +1267,7 @@ pub struct R3d {
     dying: Vec<Dying>,                        // units shown dying (see update_dying)
     seen: Vec<Dying>,                         // the units of the last frame (their last looks)
     seen_time: f32,                           // the game time of the last frame
+    remains: Vec<(f32, f32, f32, EK, u32)>,   // what the dead leave (for good): x, z, since, kind, a seed
 }
 
 // a unit that has just died, shown falling for DEATH_T seconds of game time (only the renderer
@@ -1282,6 +1283,7 @@ struct Dying {
     t0: f32,
 }
 const DEATH_T: f32 = 1.4;
+const MAX_REMAINS: usize = 400; // the remains of the dead lying on the floor (the oldest give way)
 
 // The 3D resolution setting refers to a window 1080 device pixels high: smaller windows use a
 // proportionally smaller divisor, so the 3D pixels keep their size relative to the window.
@@ -1331,7 +1333,7 @@ fn chunk_sig(map: &Map, cx: i32, cz: i32) -> u64 {
 
 impl R3d {
     pub fn new() -> R3d {
-        R3d { lit: lit_material(), glow: glow_material(), opaque: opaque_material(), chunks: Vec::new(), ncx: 0, ncz: 0, outlines: true, wall_sub: 3, max_lights: MAX_LIGHTS, pixel_rows: crate::settings::PIXEL_ART_ROWS as u32, target: None, lava: Vec::new(), chunks_hd: false, chunks_holiday: 0, dying: Vec::new(), seen: Vec::new(), seen_time: 0.0 }
+        R3d { lit: lit_material(), glow: glow_material(), opaque: opaque_material(), chunks: Vec::new(), ncx: 0, ncz: 0, outlines: true, wall_sub: 3, max_lights: MAX_LIGHTS, pixel_rows: crate::settings::PIXEL_ART_ROWS as u32, target: None, lava: Vec::new(), chunks_hd: false, chunks_holiday: 0, dying: Vec::new(), seen: Vec::new(), seen_time: 0.0, remains: Vec::new() }
     }
 
     // Changing the wall detail rebuilds all chunks
@@ -1693,11 +1695,12 @@ impl R3d {
                 draw_cube(vec3(x, 0.55, z), vec3(0.07, 0.3, 0.07), None, Color::from_rgba(70, 45, 28, 255));
             }
         }
+        // the materials of the furniture and the buildings in the graphics style's resolution
+        crate::props::set_materials(if self.chunks_hd { &gfx.materials } else { &gfx.materials_px });
         draw_landmarks_solid(g, t);
         draw_towers_solid(g);
-        // the furniture's materials in the graphics style's resolution
-        crate::props::set_materials(if self.chunks_hd { &gfx.materials } else { &gfx.materials_px });
         crate::props::draw_props_solid(g, cam, t);
+        self.draw_remains(g);
         draw_parts_solid(g);
         draw_traps_solid(g, t);
 
@@ -1757,6 +1760,66 @@ impl R3d {
         self.draw_2d(g, gfx, cam, &m, t);
     }
 
+    // what the dead leave, for good: a pool of blood and a few bones (heroes: dented armour and
+    // a broken blade; machines, stone and clockwork: splinters and rubble instead of blood);
+    // dust puffs where a body hits the ground
+    fn draw_remains(&self, g: &Game) {
+        for &(x, z, since, kind, seed) in &self.remains {
+            let age = g.time - since;
+            if age < 0.0 || !g.map.shown(idx(x as i32, z as i32)) {
+                continue;
+            }
+            let hero = crate::gfx::is_hero_kind(kind);
+            let sink = 0.0;
+            let lifeless = matches!(kind, EK::Ram | EK::Catapult | EK::Gargoyle | EK::Cogling);
+            let off0 = |k: u32| ((((seed.wrapping_mul(2654435761) ^ k.wrapping_mul(40503)) >> 7) % 1000) as f32 / 1000.0 - 0.5) * 0.4;
+            if lifeless {
+                let wood = if matches!(kind, EK::Ram | EK::Catapult) { Color::from_rgba(110, 76, 44, 255) } else { Color::from_rgba(96, 94, 100, 255) };
+                for k in 0..5u32 {
+                    crate::props::auto_cube(vec3(x + off0(k + 20) * 1.2, 0.02, z + off0(k + 30) * 1.2), vec3(0.09, 0.04, 0.05 + (k % 2) as f32 * 0.08), wood);
+                }
+                continue;
+            }
+            // the pool of blood, spread a little in the first seconds
+            let spread = (age / 2.0).min(1.0);
+            for k in 0..4u32 {
+                let r = (0.12 + off0(k + 40).abs() * 0.4) * (0.5 + 0.5 * spread);
+                draw_cube(vec3(x + off0(k + 50) * 0.6, 0.006 + k as f32 * 0.001, z + off0(k + 60) * 0.6), vec3(r, 0.004, r * 0.8), None, Color::from_rgba(92, 10, 14, 255));
+            }
+            let off = off0;
+            let bone = Color::from_rgba(214, 204, 182, 255);
+            let iron = Color::from_rgba(120, 122, 132, 255);
+            for k in 0..3u32 {
+                let p = vec3(x + off(k * 2), 0.02 - sink, z + off(k * 2 + 1));
+                if k % 2 == 0 {
+                    crate::props::auto_cube(p, vec3(0.16, 0.03, 0.03), bone);
+                } else {
+                    crate::props::auto_cube(p, vec3(0.03, 0.03, 0.14), bone);
+                }
+            }
+            if hero {
+                crate::props::auto_cube(vec3(x + off(7), 0.04 - sink, z + off(8)), vec3(0.1, 0.07, 0.1), iron);
+                crate::props::auto_cube(vec3(x + off(9), 0.015 - sink, z + off(10)), vec3(0.2, 0.02, 0.03), iron);
+            } else {
+                crate::props::auto_cube(vec3(x + off(7), 0.04 - sink, z + off(8)), vec3(0.08, 0.07, 0.08), bone);
+            }
+        }
+        // dust where the dying hit the ground
+        for d in &self.dying {
+            let el = g.time - d.t0;
+            if !(0.3..1.2).contains(&el) {
+                continue;
+            }
+            let f = (el - 0.3) / 0.9;
+            for k in 0..6 {
+                let a = k as f32 * 1.05 + d.id as f32;
+                let r = 0.15 + f * 0.35;
+                let p = vec3(d.x + a.cos() * r, 0.05 + f * 0.15, d.z + a.sin() * r);
+                draw_cube(p, Vec3::splat(0.06 + f * 0.08), None, Color::new(0.55, 0.5, 0.45, 0.5 * (1.0 - f)));
+            }
+        }
+    }
+
     // units that vanished since the last frame died (or left): they are shown falling for a
     // moment; a new game, a loaded one or a jump in time starts afresh
     fn update_dying(&mut self, g: &Game) {
@@ -1768,14 +1831,23 @@ impl R3d {
             .collect();
         if g.time < self.seen_time || g.time > self.seen_time + 2.0 {
             self.dying.clear();
+            self.remains.clear();
         } else {
             let gone: Vec<Dying> = self.seen.iter().filter(|d| !now.iter().any(|e| e.id == d.id)).copied().collect();
             // many at once: not deaths but a change of the map
             if gone.len() <= 24 {
-                self.dying.extend(gone.into_iter().map(|d| Dying { t0: g.time, ..d }));
+                for d in gone {
+                    self.dying.push(Dying { t0: g.time, ..d });
+                    // the remains appear when the body has sunk
+                    self.remains.push((d.x, d.z, g.time + DEATH_T, d.kind, d.id));
+                }
             }
         }
         self.dying.retain(|d| g.time - d.t0 < DEATH_T);
+        // they stay; only the oldest give way when there are very many
+        if self.remains.len() > MAX_REMAINS {
+            self.remains.drain(..self.remains.len() - MAX_REMAINS);
+        }
         self.seen = now;
         self.seen_time = g.time;
     }