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<div class="subTitle">com.threerings.puzzle.drop.util</div>
<h2 title="Interface PieceDropLogic" class="title">Interface PieceDropLogic</h2>
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<pre>public interface <span class="typeNameLabel">PieceDropLogic</span></pre>
<div class="block">An interface to be implemented by games that would like to be able to drop their pieces during
game play.</div>
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<h3>Method Summary</h3>
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<td class="colFirst"><code>boolean</code></td>
<td class="colLast"><code><span class="memberNameLink"><a href="../../../../../com/threerings/puzzle/drop/util/PieceDropLogic.html#boardAlwaysFilled--">boardAlwaysFilled</a></span>()</code>
<div class="block">Should the board always be filled?</div>
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<td class="colFirst"><code>int</code></td>
<td class="colLast"><code><span class="memberNameLink"><a href="../../../../../com/threerings/puzzle/drop/util/PieceDropLogic.html#getConstrainedEdge-com.threerings.puzzle.drop.data.DropBoard-int-int-int-">getConstrainedEdge</a></span>(<a href="../../../../../com/threerings/puzzle/drop/data/DropBoard.html" title="class in com.threerings.puzzle.drop.data">DropBoard</a>&nbsp;board,
int&nbsp;col,
int&nbsp;row,
int&nbsp;dir)</code>
<div class="block">Returns the x-axis coordinate of the specified edge of the given constrained piece.</div>
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<td class="colFirst"><code>boolean</code></td>
<td class="colLast"><code><span class="memberNameLink"><a href="../../../../../com/threerings/puzzle/drop/util/PieceDropLogic.html#isClimbablePiece-boolean-int-boolean-">isClimbablePiece</a></span>(boolean&nbsp;allowConst,
int&nbsp;piece,
boolean&nbsp;pre)</code>
<div class="block">Returns whether the given piece terminates a column climb when determining the height of a
piece column to be dropped.</div>
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<td class="colFirst"><code>boolean</code></td>
<td class="colLast"><code><span class="memberNameLink"><a href="../../../../../com/threerings/puzzle/drop/util/PieceDropLogic.html#isConstrainedPiece-int-">isConstrainedPiece</a></span>(int&nbsp;piece)</code>
<div class="block">Returns whether the given piece has constraints upon it that impact its droppability.</div>
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<td class="colFirst"><code>boolean</code></td>
<td class="colLast"><code><span class="memberNameLink"><a href="../../../../../com/threerings/puzzle/drop/util/PieceDropLogic.html#isDroppablePiece-int-">isDroppablePiece</a></span>(int&nbsp;piece)</code>
<div class="block">Returns whether the given piece is potentially droppable.</div>
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<h4>boardAlwaysFilled</h4>
<pre>boolean&nbsp;boardAlwaysFilled()</pre>
<div class="block">Should the board always be filled?</div>
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<dt><span class="returnLabel">Returns:</span></dt>
<dd>false for normal behavior.</dd>
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<h4>isDroppablePiece</h4>
<pre>boolean&nbsp;isDroppablePiece(int&nbsp;piece)</pre>
<div class="block">Returns whether the given piece is potentially droppable.</div>
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<h4>isConstrainedPiece</h4>
<pre>boolean&nbsp;isConstrainedPiece(int&nbsp;piece)</pre>
<div class="block">Returns whether the given piece has constraints upon it that impact its droppability.</div>
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<h4>isClimbablePiece</h4>
<pre>boolean&nbsp;isClimbablePiece(boolean&nbsp;allowConst,
int&nbsp;piece,
boolean&nbsp;pre)</pre>
<div class="block">Returns whether the given piece terminates a column climb when determining the height of a
piece column to be dropped.</div>
<dl>
<dt><span class="paramLabel">Parameters:</span></dt>
<dd><code>allowConst</code> - whether to allow dropping constrained pieces (though only in the first
encountered constrained block.)</dd>
<dd><code>piece</code> - the piece to consider.</dd>
<dd><code>pre</code> - whether the climbability check is being performed before the height is
incremented, or after.</dd>
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<h4>getConstrainedEdge</h4>
<pre>int&nbsp;getConstrainedEdge(<a href="../../../../../com/threerings/puzzle/drop/data/DropBoard.html" title="class in com.threerings.puzzle.drop.data">DropBoard</a>&nbsp;board,
int&nbsp;col,
int&nbsp;row,
int&nbsp;dir)</pre>
<div class="block">Returns the x-axis coordinate of the specified edge of the given constrained piece.
<p> TODO: This should go away once the sword and sail games have standardized on WEST/EAST
or BLOCK_LEFT/BLOCK_RIGHT to reference block edges.</div>
<dl>
<dt><span class="paramLabel">Parameters:</span></dt>
<dd><code>board</code> - the board to search.</dd>
<dd><code>col</code> - the column of the constrained piece.</dd>
<dd><code>row</code> - the row of the constrained piece.</dd>
<dd><code>dir</code> - the edge direction to find; one of <code>DirectionCodes.LEFT</code> or
<code>DirectionCodes.RIGHT</code>.</dd>
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