Behold Vilya, Ring of Air and repository for our game and virtual worldly

extensions to the distributed environment provided by Narya. git-svn-id: svn+ssh://src.earth.threerings.net/vilya/trunk@1 c613c5cb-e716-0410-b11b-feb51c14d237
2006-06-23 17:58:11 +00:00
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+//
+// $Id: DropBoardUtil.java 4191 2006-06-13 22:42:20Z ray $
+//
+// Narya library - tools for developing networked games
+// Copyright (C) 2002-2004 Three Rings Design, Inc., All Rights Reserved
+// http://www.threerings.net/code/narya/
+//
+// This library is free software; you can redistribute it and/or modify it
+// under the terms of the GNU Lesser General Public License as published
+// by the Free Software Foundation; either version 2.1 of the License, or
+// (at your option) any later version.
+//
+// This library is distributed in the hope that it will be useful,
+// but WITHOUT ANY WARRANTY; without even the implied warranty of
+// MERCHANTABILITY or FITNESS FOR A PARTICULAR PURPOSE.  See the GNU
+// Lesser General Public License for more details.
+//
+// You should have received a copy of the GNU Lesser General Public
+// License along with this library; if not, write to the Free Software
+// Foundation, Inc., 59 Temple Place, Suite 330, Boston, MA 02111-1307 USA
+
+package com.threerings.puzzle.drop.util;
+
+import com.threerings.util.DirectionCodes;
+
+public class DropBoardUtil
+    implements DirectionCodes
+{
+    /**
+     * Returns the orientation resulting from rotating the block in the
+     * given direction the specified number of times.
+     *
+     * @param orient the current orientation.
+     * @param dir the direction to rotate in; one of <code>CW</code> or
+     * <code>CCW</code>.
+     * @param count the number of rotations to perform.
+     *
+     * @return the rotated orientation.
+     */
+    public static int getRotatedOrientation (int orient, int dir, int count)
+    {
+        for (int ii = 0; ii < (count % 4); ii++) {
+            orient = getRotatedOrientation(orient, dir);
+        }
+        return orient;
+    }
+
+    /**
+     * Returns the orientation resulting from rotating the block in
+     * the given direction.
+     *
+     * @param orient the current orientation.
+     * @param dir the direction to rotate in; one of <code>CW</code> or
+     * <code>CCW</code>.
+     *
+     * @return the rotated orientation.
+     */
+    public static int getRotatedOrientation (int orient, int dir)
+    {
+        return (orient + ((dir == CW) ? 2 : 6)) % DIRECTION_COUNT;
+    }
+}