From 4d4f28f4d0e93541e92277f44451aacdc23b8227 Mon Sep 17 00:00:00 2001
From: Kai Stevenson <kai@kaistevenson.com>
Date: Tue, 18 Aug 2026 00:21:44 -0700
Subject: MVP of marching squares

---
 src/sim/cell_sim/chunk.rs | 15 ++++++++++++++-
 1 file changed, 14 insertions(+), 1 deletion(-)

(limited to 'src/sim/cell_sim/chunk.rs')

diff --git a/src/sim/cell_sim/chunk.rs b/src/sim/cell_sim/chunk.rs
index 116a38a..8c3acb4 100644
--- a/src/sim/cell_sim/chunk.rs
+++ b/src/sim/cell_sim/chunk.rs
@@ -1,6 +1,9 @@
 use crate::{
     config::{CELLS_IN_CHUNK, CHUNK_SIZE},
-    sim::cell::cell::Cell,
+    sim::{
+        cell::{cell::Cell, materials::MaterialId},
+        lib::marching_squares::Marchable,
+    },
 };
 
 pub struct Chunk {
@@ -27,3 +30,13 @@ impl Chunk {
         }
     }
 }
+
+impl Marchable for Chunk {
+    fn occupied(&self, x: i32, y: i32) -> bool {
+        if x < 0 || x >= CHUNK_SIZE || y < 0 || y >= CHUNK_SIZE {
+            false
+        } else {
+            self.get_cell_at_local_position(x as u8, y as u8).material != MaterialId::Void
+        }
+    }
+}
-- 
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