Defence towers: arrow (piercing), cannon (splash + knockback), magic (mana, slow, chain); 3 levels, repair by imps, heroes attack towers; torture/temple room tools prepared

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

src/gfx.rs

@@ -46,6 +46,8 @@ pub const D_RACK: u32 = 80;
 pub const I_ARROW: u32 = 81;
 pub const I_CANNON: u32 = 82;
 pub const I_MAGIC: u32 = 83;
+pub const T_TEMPLE: u32 = 84; // 4 variants
+pub const D_ALTAR: u32 = 88;
 
 pub struct Gfx {
     pub atlas: Texture2D,
@@ -391,6 +393,31 @@ fn gen_atlas() -> Image {
             Some(stones(x, y, v + 94, (52, 40, 44), (26, 16, 18), 10))
         });
     }
+    // temple: dark marble with a glowing red-gold rune circle
+    for v in 0..4u32 {
+        cv.cell(T_TEMPLE + v, |x, y| {
+            let (dx, dy) = (x as f32 - 7.5, y as f32 - 7.5);
+            let d = (dx * dx + dy * dy).sqrt();
+            if (5.0..6.0).contains(&d) {
+                return Some(c(170, 70, 40));
+            }
+            if d < 1.5 {
+                return Some(c(220, 150, 60));
+            }
+            let vein = ((x as f32 * 0.6 + (y as f32 * 0.7).sin() * 2.0 + v as f32 * 3.0) as i32) % 7 == 0;
+            Some(if vein { c(70, 54, 66) } else { shade((44, 34, 46), (rnd(x, y, v + 95) * 10.0) as i32) })
+        });
+    }
+    // altar with a flame
+    cv.cell(D_ALTAR, |x, y| {
+        if y >= 9 && (3..=12).contains(&x) {
+            Some(if y == 9 { c(150, 140, 150) } else { c(100, 92, 104) })
+        } else if y < 9 && y >= 3 && (x - 7).abs() + (y - 8).abs() / 2 <= 3 {
+            Some(if (x + y) % 3 == 0 { c(255, 220, 80) } else { c(255, 120, 30) })
+        } else {
+            None
+        }
+    });
     // torture wheel
     cv.cell(D_RACK, |x, y| {
         let (dx, dy) = (x as f32 - 7.5, y as f32 - 7.0);
@@ -743,6 +770,7 @@ impl Gfx {
             Kind::Portal => T_PORTALFLOOR + v,
             Kind::Gate => T_GATEFLOOR + v,
             Kind::Torture => T_TORTURE + v,
+            Kind::Temple => T_TEMPLE + v,
             Kind::Tower => T_CLAIM + v,
         }
     }