Michael Bayne
33f55d5a8d
creating new source files. git-svn-id: svn+ssh://src.earth.threerings.net/vilya/trunk@209 c613c5cb-e716-0410-b11b-feb51c14d237
81 lines
2.8 KiB
Java
81 lines
2.8 KiB
Java
//
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// $Id$
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//
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// Vilya library - tools for developing networked games
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// Copyright (C) 2002-2007 Three Rings Design, Inc., All Rights Reserved
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// http://www.threerings.net/code/vilya/
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//
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// This library is free software; you can redistribute it and/or modify it
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// under the terms of the GNU Lesser General Public License as published
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// by the Free Software Foundation; either version 2.1 of the License, or
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// (at your option) any later version.
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//
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// This library is distributed in the hope that it will be useful,
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// but WITHOUT ANY WARRANTY; without even the implied warranty of
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// MERCHANTABILITY or FITNESS FOR A PARTICULAR PURPOSE. See the GNU
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// Lesser General Public License for more details.
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//
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// You should have received a copy of the GNU Lesser General Public
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// License along with this library; if not, write to the Free Software
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// Foundation, Inc., 59 Temple Place, Suite 330, Boston, MA 02111-1307 USA
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package com.threerings.puzzle.drop.util;
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import com.threerings.util.DirectionCodes;
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import com.threerings.puzzle.drop.data.DropBoard;
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/**
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* An interface to be implemented by games that would like to be able to
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* drop their pieces during game play.
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*/
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public interface PieceDropLogic
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{
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/**
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* Should the board always be filled?
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*
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* @return false for normal behavior.
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*/
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public boolean boardAlwaysFilled ();
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/**
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* Returns whether the given piece is potentially droppable.
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*/
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public boolean isDroppablePiece (int piece);
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/**
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* Returns whether the given piece has constraints upon it that
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* impact its droppability.
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*/
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public boolean isConstrainedPiece (int piece);
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/**
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* Returns whether the given piece terminates a column climb when
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* determining the height of a piece column to be dropped.
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*
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* @param allowConst whether to allow dropping constrained pieces
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* (though only in the first encountered constrained block.)
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* @param piece the piece to consider.
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* @param pre whether the climbability check is being performed
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* before the height is incremented, or after.
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*/
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public boolean isClimbablePiece (
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boolean allowConst, int piece, boolean pre);
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/**
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* Returns the x-axis coordinate of the specified edge of the
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* given constrained piece.
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*
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* <p> TODO: This should go away once the sword and sail games
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* have standardized on WEST/EAST or BLOCK_LEFT/BLOCK_RIGHT to
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* reference block edges.
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*
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* @param board the board to search.
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* @param col the column of the constrained piece.
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* @param row the row of the constrained piece.
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* @param dir the edge direction to find; one of {@link
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* DirectionCodes#LEFT} or {@link DirectionCodes#RIGHT}.
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*/
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public int getConstrainedEdge (DropBoard board, int col, int row, int dir);
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}
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