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-rw-r--r--src/tile.cpp3
1 files changed, 3 insertions, 0 deletions
diff --git a/src/tile.cpp b/src/tile.cpp
index 2d658ff1..53ae88b3 100644
--- a/src/tile.cpp
+++ b/src/tile.cpp
@@ -3,6 +3,9 @@
namespace floormat {
+// no avoiding it with rotations
+static_assert(iTILE_SIZE2.x() == iTILE_SIZE2.y());
+
bool operator==(const tile_proto& a, const tile_proto& b) noexcept {
return a.ground() == b.ground() &&
a.wall_north() == b.wall_north() &&