Add height level support to matrices in Sector.

src/org/apollo/game/model/area/Sector.java

@@ -52,7 +52,7 @@ public final class Sector {
 	/**
 	 * The CollisionMatrix.
 	 */
-	private final CollisionMatrix matrix = new CollisionMatrix(SECTOR_SIZE, SECTOR_SIZE);
+	private final CollisionMatrix[] matrices = CollisionMatrix.createMatrices(Position.HEIGHT_LEVELS, SECTOR_SIZE, SECTOR_SIZE);
 
 	/**
 	 * Creates a new sector.
@@ -207,13 +207,15 @@ public final class Sector {
 	 * Returns whether or not an Entity of the specified {@link EntityType type} can traverse the tile at the specified
 	 * coordinate pair.
 	 * 
-	 * @param x The x coordinate.
+	 * @param position The {@link Position} of the tile.
-	 * @param y The y coordinate.
 	 * @param entity The {@link EntityType}.
 	 * @param direction The {@link Direction} the Entity is approaching from.
 	 * @return {@code true} if the tile at the specified coordinate pair is traversable, {@code false} if not.
 	 */
-	public boolean traversable(int x, int y, EntityType entity, Direction direction) {
+	public boolean traversable(Position position, EntityType entity, Direction direction) {
+		CollisionMatrix matrix = matrices[position.getHeight()];
+		int x = position.getLocalX(), y = position.getLocalY();
+
 		return matrix.traversable(x, y, entity, direction);
 	}
 

src/org/apollo/game/model/area/collision/CollisionMatrix.java

@@ -15,6 +15,20 @@ import com.google.common.base.Preconditions;
  */
 public final class CollisionMatrix {
 
+	/**
+	 * Creates an array of CollisionMatrix objects, all of the specified width and length.
+	 * 
+	 * @param count The length of the array to create.
+	 * @param width The width of each CollisionMatrix.
+	 * @param length The length of each CollisionMatrix.
+	 * @return The array of CollisionMatrix objects.
+	 */
+	public static CollisionMatrix[] createMatrices(int count, int width, int length) {
+		CollisionMatrix[] matrices = new CollisionMatrix[count];
+		Arrays.setAll(matrices, index -> new CollisionMatrix(width, length));
+		return matrices;
+	}
+
 	/**
 	 * Indicates that all types of traversal are allowed.
 	 */
@@ -174,7 +188,7 @@ public final class CollisionMatrix {
 	 * @return {@code true} if the tile at the specified coordinate pair is traversable, {@code false} if not.
 	 */
 	public boolean traversable(int x, int y, EntityType entity, Direction direction) {
-		CollisionFlag[] flags = (entity == EntityType.PROJECTILE) ? CollisionFlag.projectiles() : CollisionFlag.mobs();
+		CollisionFlag[] flags = CollisionFlag.forType(entity);
 		int north = 0, east = 1, south = 2, west = 3;
 
 		switch (direction) {