--- /dev/null	Thu Jan 01 00:00:00 1970 +0000
+++ b/hedgewars/uAILandMarks.pas	Wed Jul 25 22:46:03 2012 +0400
@@ -0,0 +1,71 @@
+unit uAILandMarks;
+
+interface
+const markWasHere = $01;
+
+procedure addMark(X, Y: LongInt; mark: byte);
+function  checkMark(X, Y: LongInt; mark: byte) : boolean;
+procedure clearAllMarks;
+procedure clearMarks(mark: byte);
+
+procedure initModule;
+procedure freeModule;
+
+implementation
+uses uVariables;
+
+const gr = 2;
+
+var marks: array of array of byte;
+    WIDTH, HEIGHT: Longword;
+
+procedure addMark(X, Y: LongInt; mark: byte);
+begin
+    if((X and LAND_WIDTH_MASK) = 0) and ((Y and LAND_HEIGHT_MASK) = 0) then
+        begin
+        X:= X shr gr;
+        Y:= Y shr gr;
+        marks[Y, X]:= marks[Y, X] or mark
+        end
+end;
+
+function  checkMark(X, Y: LongInt; mark: byte) : boolean;
+begin
+    checkMark:= ((X and LAND_WIDTH_MASK) = 0) 
+        and ((Y and LAND_HEIGHT_MASK) = 0) 
+        and ((marks[Y shr gr, X shr gr] and mark) <> 0)
+end;
+
+procedure clearAllMarks;
+var 
+    Y, X: Longword;
+begin
+    for Y:= 0 to Pred(HEIGHT) do
+        for X:= 0 to Pred(WIDTH) do
+            marks[Y, X]:= 0
+end;
+
+procedure clearMarks(mark: byte);
+var 
+    Y, X: Longword;
+begin
+    for Y:= 0 to Pred(HEIGHT) do
+        for X:= 0 to Pred(WIDTH) do
+            marks[Y, X]:= marks[Y, X] and (not mark)
+end;
+
+
+procedure initModule;
+begin
+    WIDTH:= LAND_WIDTH shr gr;
+    HEIGHT:= LAND_HEIGHT shr gr;
+    
+    SetLength(marks, HEIGHT, WIDTH);
+end;
+
+procedure freeModule;
+begin
+    SetLength(marks, 0, 0);
+end;
+
+end.