Fix rendering inside rendered figures

1 files changed, 4 insertions, 2 deletions

diff --git a/src/main.rs b/src/main.rs
index 80f95b8..f670989 100644
--- a/src/main.rs
+++ b/src/main.rs
@@ -146,8 +146,10 @@ impl Field {
                 continue;
             }
             let color = figure.cells[i] & !GHOST_MASK;
-            if color != 0 {
-                self.cells[f_x as usize + f_y as usize * FIELD_COLS] = figure.cells[i];
+            let current = f_x as usize + f_y as usize * FIELD_COLS;
+            let ghost_or_empty = (self.cells[current] & GHOST_MASK != 0) || self.cells[current] == 0;
+            if color != 0 && ghost_or_empty {
+                self.cells[current] = figure.cells[i];
             }
         }
     }