portals

kiln-core/src/board.rs

@@ -119,6 +119,11 @@ impl Board {
             return glyph
         }
 
+        // Portal: passable and non-opaque, but visible above the floor.
+        if self.portals.iter().any(|p| p.x == x && p.y == y) {
+            return PortalDef::default_glyph();
+        }
+
         self.floor[y * self.width + x]
     }