cleanup: move res/com/ind Zone Pop() functions to TileConstants

git-svn-id: https://micropolis.googlecode.com/svn/trunk/micropolis-java@687 d9718cc8-9f43-0410-858b-315f434eb58c

src/micropolisj/engine/MapScanner.java

@@ -778,7 +778,7 @@ class MapScanner
 	{
 		city.comZoneCount++;
 
-		int tpop = city.commercialZonePop(cchr9);
+		int tpop = commercialZonePop(cchr);
 		city.comPop += tpop;
 
 		int trafficGood;
@@ -890,7 +890,7 @@ class MapScanner
 		city.indZoneCount++;
 		setSmoke(powerOn);
 
-		int tpop = city.industrialZonePop(cchr9);
+		int tpop = industrialZonePop(cchr);
 		city.indPop += tpop;
 
 		int trafficGood;
@@ -949,7 +949,7 @@ class MapScanner
 		}
 		else
 		{
-			tpop = city.residentialZonePop(cchr9);
+			tpop = residentialZonePop(cchr);
 		}
 
 		city.resPop += tpop;

src/micropolisj/engine/Micropolis.java

@@ -1508,32 +1508,6 @@ public class Micropolis
 		return count;
 	}
 
-	// counts the population in a certain type of residential zone
-	// a.k.a. RZPop
-	int residentialZonePop(char tile)
-	{
-		int czDen = ((tile - RZB) / 9) % 4;
-		return czDen * 8 + 16;
-	}
-
-	int commercialZonePop(int tile)
-	{
-		if (tile == COMCLR)
-			return 0;
-
-		int czDen = ((tile - CZB) / 9) % 5 + 1;
-		return czDen;
-	}
-
-	int industrialZonePop(int tile)
-	{
-		if (tile == INDCLR)
-			return 0;
-
-		int czDen = ((tile - IZB) / 9) % 4 + 1;
-		return czDen;
-	}
-
 	// called every several cycles; this takes the census data collected in this
 	// cycle and records it to the history
 	//

src/micropolisj/engine/TileConstants.java

@@ -445,4 +445,48 @@ public class TileConstants
 		}
 		return (char)tile;
 	}
+
+	/**
+	 * Determine the population level of a Residential zone
+	 * tile. Note: the input tile MUST be a full-size res zone,
+	 * it cannot be an empty zone.
+	 * @return int multiple of 8 between 16 and 40.
+	 */
+	public static int residentialZonePop(int tile)
+	{
+		tile &= LOMASK;
+		int czDen = ((tile - RZB) / 9) % 4;
+		return czDen * 8 + 16;
+	}
+
+	/**
+	 * Determine the population level of a Commercial zone
+	 * tile.
+	 * The input tile MAY be an empty zone.
+	 * @return int between 0 and 5.
+	 */
+	public static int commercialZonePop(int tile)
+	{
+		tile &= LOMASK;
+		if (tile == COMCLR)
+			return 0;
+
+		int czDen = ((tile - CZB) / 9) % 5 + 1;
+		return czDen;
+	}
+
+	/**
+	 * Determine the population level of an Industrial zone tile.
+	 * The input tile MAY be an empty zone.
+	 * @return int between 0 and 4.
+	 */
+	public static int industrialZonePop(int tile)
+	{
+		tile &= LOMASK;
+		if (tile == INDCLR)
+			return 0;
+
+		int czDen = ((tile - IZB) / 9) % 4 + 1;
+		return czDen;
+	}
 }