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-rw-r--r--src/viewport_func.h2
1 files changed, 2 insertions, 0 deletions
diff --git a/src/viewport_func.h b/src/viewport_func.h
index 027f9c165..dbe965d4f 100644
--- a/src/viewport_func.h
+++ b/src/viewport_func.h
@@ -18,6 +18,8 @@
#include "window_type.h"
#include "tile_type.h"
+static const int TILE_HEIGHT_STEP = 50; ///< One Z unit tile height difference is displayed as 50m.
+
void SetSelectionRed(bool);
void DeleteWindowViewport(Window *w);